CN211045708U - Radiating elements, antenna assemblies and base station antennas - Google Patents

Abstract

The utility model relates to a radiation element, which comprises: a first radiator, the first radiator has a first dipole arm and a second dipole arm, the first dipole arm and the second dipole arm the pole arms respectively comprise a narrow arm section and a widened arm section; a second radiator having a third dipole arm and a fourth dipole arm, the third dipole arm and the fourth dipole arm The pole arms respectively include narrow arm sections and widened arm sections; a first feed line configured to feed the first dipole arm, the second dipole arm, the third dipole arm and the fourth dipole arm a pole arm feeding a first polarized radio frequency signal; and a second feed line configured to feed the first dipole arm, the second dipole arm, the third dipole arm and the fourth dipole arm The second polarized radio frequency signal. The radiation element according to the present invention can effectively improve the radiation pattern of the antenna. In addition, the utility model also relates to an antenna assembly and a base station antenna.

Description

Radiating elements, antenna assemblies and base station antennas

technical field

The utility model generally relates to radio communication, and more particularly, to a radiating element, an antenna assembly and a base station antenna for a cellular communication system.

Background technique

Cellular communication systems are well known in the art. In a cellular communication system, a geographic area is divided into a series of areas called "cells" served by various base stations. A base station may include one or more base station antennas configured to provide two-way radio frequency ("RF") communication with mobile subscribers within a cell served by the base station.

In many cases, each base station is divided into "sectors". In the most common configuration, a hexagonal cell is divided into three 120° sectors, each served by one or more base station antennas, with an azimuth half-power beamwidth (HPBW) of approximately 65°. Typically, base station antennas are mounted on a tower structure with the radiation patterns (also referred to herein as "antenna beams") produced by the base station antennas directed outward. Base station antennas are typically implemented as linear or planar phased arrays of radiating elements.

To accommodate increasing cellular traffic, cellular operators have added cellular service in various new frequency bands. While in some cases it is possible to use linear arrays of so-called "broadband" or "ultra-broadband" radiating elements to provide service in multiple frequency bands, in other cases it is necessary to use linear arrays or planes of different radiating elements arrays to support services in different frequency bands.

Increased sectorization (eg, dividing a cell into six, nine, or even twelve sectors) becomes more common as the number of frequency bands increases, and the number of base station antennas deployed at a typical base station is The number has increased significantly. However, there are often limitations on the number of base station antennas that can be deployed at a given base station due to local zoning regulations and/or antenna tower weight and wind load limitations, among other reasons. In order to increase capacity without further increasing the number of base station antennas, so-called multi-band base station antennas have been introduced, in which multiple linear arrays of radiating elements are included in a single antenna. A very common multi-band base station antenna includes a linear array of "low-band" radiating elements for serving in some or all of the 617/698-960MHz bands, and for use in the 1427/1695-2690MHz bands Two linear arrays of "high-band" radiating elements that serve some or all of them. Linear arrays of these low-band and high-band radiating elements are typically mounted in a side-by-side fashion.

There is also great interest in base station antennas that may include two linear arrays of low-band radiating elements and two (or four) linear arrays of high-band radiating elements. These antennas may be used in a variety of applications, including 4x4 multiple-input multiple-output ("MIMO") applications, or as a Multiband antennas for different high frequency bands (eg, 1800MHz high frequency band linear array and 2100 MHz high frequency band linear array). However, implementing such an antenna in a commercially acceptable manner is challenging, as low-band radiating elements that are at least 200 mm wide are typically required to achieve a 65° azimuth HPBW antenna beam in the low-frequency band. However, when two arrays of low-band radiating elements are placed side by side with a high-band linear array between them, a base station antenna with a width of about 500mm may be required. Such large antennas may have very high wind loads, may be very heavy, and/or may be expensive to manufacture. Operators prefer RRVV base station antennas with a width of about 430mm or less (eg 400mm, 380mm).

To implement an antenna with two low-band linear arrays and two high-band linear arrays, the size of the low-band radiating elements can be reduced and/or the lateral spacing between the linear arrays can be reduced. Unfortunately, as linear arrays of radiating elements are arranged closer together, the degree of signal coupling between linear arrays may increase. For example, coupling interference between low-band radiating elements or between high-band radiating elements may increase; the low-band radiating elements may have a larger scattering effect on the high-band radiating elements in the lower region. This "parasitic" coupling can lead to an undesired increase in HPBW. Similarly, a reduction in the size of any low-band radiating element will generally result in an increase in HPBW.

和

极化方式发送和接收RF信号。此类辐射元件通常称为

极化辐射元件。常规的

极化辐射元件包括

极化偶极辐射器和

极化偶极辐射器，它们分别连接到第一和第二馈电网络。The radiating elements used in modern base station antennas typically transmit and receive RF signals with linear polarization. Most base station antennas have dual polarized radiating elements that transmit and receive RF signals in two orthogonal linear polarizations. While a small percentage of modern base station antennas include radiating elements that transmit and receive RF signals in both vertical and horizontal polarization, the vast majority of dual-polarized radiating elements are configured to

and

Polarized transmission and reception of RF signals. Such radiating elements are often referred to as

Polarized radiating element. regular

Polarized radiating elements include

polarized dipole radiators and

polarized dipole radiators, which are connected to the first and second feed networks, respectively.

Utility model content

Therefore, the purpose of the present invention is to provide a radiating element, an antenna assembly and a related base station antenna that can overcome at least one defect in the prior art.

According to a first aspect of the present invention, a radiation element is provided, the radiation element includes: a first radiator, the first radiator has a first dipole arm and a second dipole arm, wherein the first radiator A dipole arm and a second dipole arm respectively include a narrow arm section and a widened arm section; a second radiator, the second radiator has a third dipole arm and a fourth dipole arm, wherein the The third dipole arm and the fourth dipole arm respectively include a narrow arm section and a widened arm section; a first feed line, the first feed line is configured to feed the first dipole arm and the second dipole arm , the third dipole arm and the fourth dipole arm feed the radio frequency signal of the first polarization; and the second feed line, the second feed line is configured to feed the first dipole arm, the second dipole arm, the third The dipole arm and the fourth dipole arm feed a second polarized radio frequency signal.

The radiation element according to the present invention can effectively improve the radiation pattern of the antenna.

In some embodiments, the first feed line includes a first stripline section and a second stripline section, the first stripline section configured to feed the first dipole arm and the fourth dipole arm the pole arm feeds the radio frequency signal of the first polarization, the second stripline section is configured to feed the radio frequency signal of the first polarization to the second dipole arm and the third dipole arm; and the second feed line including a third stripline section and a fourth stripline section, the third stripline section is configured to feed the first dipole arm and the third dipole arm with a radio frequency signal of the second polarization, so The fourth stripline section is configured to feed the second dipole arm and the fourth dipole arm with a radio frequency signal of the second polarization.

In some embodiments, the radiating element includes: a first conductive structure on which the first dipole arm is mounted; and a second conductive structure on which the second dipole arm is mounted a third conductive structure on which the third dipole arm is mounted; and a fourth conductive structure on which the fourth dipole arm is mounted.

In some embodiments, the first stripline section is arranged in a feed gap between the first conductive structure and the fourth conductive structure, and the second stripline section is arranged in the second conductive structure and the third conductive structure in the feeding gap; and the third stripline section is arranged in the feeding gap between the first conductive structure and the third conductive structure, and the fourth stripline The segment is arranged in the feed gap between the second conductive structure and the fourth conductive structure.

In some embodiments, each dipole arm includes a first conductive path and a second conductive path, respectively, the first conductive path and the second conductive path including at least one narrow arm segment and at least one widened arm segment, respectively.

In some embodiments, the first conductive path and the second conductive path form a conductive ring.

In some embodiments, the lower limit of the quotient of the length of each dipole arm divided by its width is: 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4, or 5.

In some embodiments, at least one widened arm section in each dipole arm is a non-planar widened section, the widened arm section including a first widened arm subsection extending in the first direction and A second widened arm subsection extending from the first widened arm subsection in a second direction, wherein the second direction is different from the first direction.

In some embodiments, the second direction and the first direction form an angle between 80 degrees and 100 degrees.

In some embodiments, the length of each radiator is between 150 millimeters and 200 millimeters.

In some embodiments, the length of each radiator is between 170 millimeters and 180 millimeters.

In some embodiments, each dipole arm is constructed as a sheet metal arm or a PCB based arm.

In some embodiments, the first feeder and the second feeder are respectively configured as hook feeders.

In some embodiments, the first and second feeders include a first stripline segment, a second stripline segment, and a feed region between the first and second stripline segments, respectively part.

In some embodiments, the first feed line and the second feed line form a first cross pattern, and the first radiator and the second radiator form a second cross pattern, wherein the first cross pattern is rotated relative to the second cross pattern a certain angle.

In some embodiments, the first cross pattern is rotated 45° relative to the second cross pattern.

In some embodiments, each conductive structure is electrically connected to a ground layer of a feeder plate, on which the radiating element is mounted; or each conductive structure is coupled to a reflector, respectively.

In some embodiments, the first and second feed lines are respectively electrically connected to transmission lines on a feed plate on which the radiating elements are mounted; or the first and second feed lines are respectively electrically connected to the inner conductor of the cable connect.

In some embodiments, the first polarization is a +45° polarization and the second polarization is a -45° polarization.

In some embodiments, the first feed line is mounted on a dielectric element between the conductive structure and the first feed line.

In some embodiments, the radiating element includes a first feeding structure and a second feeding structure, the first feeding structure has a first engaging groove on its end remote from the reflector, and the second feeding structure has a first engaging groove on its end The end portion close to the reflector has a second engaging groove, by means of which the first feeding structure and the second feeding structure are cross-bonded with each other.

In some embodiments, the first feed structure and the second feed structure are each constructed as a multi-layer printed circuit board.

In some embodiments, the first feeding structure includes: a first metal pattern, two ground layers on both sides of the first metal pattern, and two dielectric layers correspondingly between the ground layer and the first metal pattern, wherein, The first metal pattern includes the first feed line; and the second feed structure includes: a second metal pattern, a ground layer on both sides of the second metal pattern, and a dielectric layer between the ground layer and the second metal pattern, Wherein, the second metal pattern includes the second feed line.

In some embodiments, the first and second feed structures include first and second halves, respectively, the first stripline segment is in the first half of the first feed structure, the first Two stripline segments are in the second half of the first feed structure; a third stripline segment is in the first half of the second feed structure, and a fourth stripline segment is in the second feed structure in the second half of the electrical structure.

In some embodiments, the first and second halves have projections on ends remote from the reflector, the projections being configured as first and second radiators for mounting the radiating element.

In some embodiments, the protruding portion has metal regions on two sides respectively, the metal regions are a part of the ground layer of the corresponding feeding structure, and the first dipole arm is respectively connected to the protruding portion of the first half of the first feeding structure. The outgoing part is welded with the protruding part of the first half of the second feeding structure; the second dipole arm is respectively connected with the protruding part of the second half of the first feeding structure and the second feeding structure. The protruding parts of the half parts are welded; the third dipole arm is welded with the protruding part of the second half part of the first feeding structure and the protruding part of the first half part of the second feeding structure respectively; the fourth The dipole arms may be welded to the protrusions of the first half of the first feeding structure and the protrusions of the second half of the second feeding structure, respectively.

In some embodiments, the first radiator is configured as a vertically extending radiator and the second radiator is configured as a horizontally extending radiator.

In some embodiments, the radiating element is configured to operate in the 617-960 MHz frequency range or a portion of this frequency range.

According to a second aspect of the present invention, a radiating element is provided, the radiating element comprising: a first radiator, the first radiator having a first dipole arm and a second dipole arm; a second radiator, The second radiator has a third dipole arm and a fourth dipole arm; a first feed line, the first feed line is configured to feed the first dipole arm, the second dipole arm, and the third dipole arm and a fourth dipole arm feeding a +45° polarized radio frequency signal; and a second feed line configured to feed the first dipole arm, the second dipole arm, the third dipole arm and the third dipole arm Four dipole arms feed a -45° polarized radio frequency signal, wherein each dipole arm includes a first conductive path and a second conductive path, the first and second conductive paths respectively include at least one narrow arm segment and At least one widened arm section, wherein the first conductive path and the second conductive path form a conductive ring.

In some embodiments, the lower limit of the quotient of the length of each dipole arm divided by its width is: 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4, or 5.

In some embodiments, at least one widened arm section in each dipole arm is a non-planar widened section, the widened arm section including a first widened arm subsection extending in the first direction and A second widened arm subsection extending from the first widened arm subsection in a second direction, wherein the second direction is different from the first direction.

In some embodiments, the second direction and the first direction form an angle between 80 degrees and 100 degrees.

In some embodiments, the upper limit of the quotient of the coverage area of a low-band radiating element and an underlying high-band radiating element in the forward direction divided by the area of the dipole arm of the low-band radiating element is: 0.5 , 0.4, 0.3, 0.2, 0.1, or 0.

According to a third aspect of the present invention, an antenna assembly is provided, comprising a reflector and an antenna array mounted on the reflector, the antenna array comprising a plurality of vertically extending arrays, characterized in that the plurality of vertical The extended array includes a first array including a plurality of first radiating elements, wherein the first radiating elements include: a vertically extending first radiator having a first dipole an arm and a second dipole arm, wherein the first dipole arm and the second dipole arm respectively comprise a narrow arm section and a widened arm section; a horizontally extending second radiator, the second radiator having a third dipole arm and a fourth dipole arm, wherein the third dipole arm and the fourth dipole arm respectively comprise a narrow arm section and a widened arm section; a first feed line, the first The feeder is configured to feed the first polarized radio frequency signal to the first dipole arm, the second dipole arm, the third dipole arm and the fourth dipole arm; and a second feeder, the second feeder is constituted for feeding the first dipole arm, the second dipole arm, the third dipole arm and the fourth dipole arm with a radio frequency signal of the second polarization.

In some embodiments, the plurality of vertically extending arrays comprise a second array comprising a plurality of second radiating elements, wherein the second radiating elements comprise: a +45° obliquely extending third radiator, the third radiator has a fifth dipole arm and a sixth dipole arm; a fourth radiator extending obliquely at -45°, the fourth radiator has a seventh dipole arm and an eighth dipole arm arm.

In some embodiments, the fifth and sixth dipole arms include narrow and widened arm sections, respectively, and the seventh and eighth dipole arms include narrow and widened arm sections, respectively Wide arm section.

In some embodiments, the first radiating elements of the first array are arranged horizontally adjacent to the second radiating elements of the second array.

In some embodiments, the first radiating element is configured as a radiating element according to one of claims 2 to 33.

According to a fourth aspect of the present invention, a base station antenna is provided, wherein the base station antenna includes the radiating element according to the embodiments of the present invention, or the antenna according to the embodiments of the present invention components.

Description of drawings

In the picture:

1 shows a schematic perspective view of a base station antenna according to some embodiments of the present invention;

Figure 2 shows a schematic front view of an antenna assembly in the base station antenna of Figure 1;

Figure 3 shows a schematic perspective view of a radiating element in the antenna assembly of Figure 2;

Figure 4 shows a schematic exploded view of the radiating element in Figure 3;

Figure 5 shows a schematic diagram of the feeder of the radiating element in Figures 3 and 4;

Figure 6 shows a schematic front view of the radiating element of Figure 3;

Figure 7 shows a schematic side view of the radiating element of Figure 3;

8 shows a schematic diagram of a feeding structure of a radiating element according to some embodiments of the present invention;

FIG. 9 shows a schematic front view of another variant of the antenna assembly in the base station antenna of FIG. 1 .

Detailed ways

The invention will be described below with reference to the accompanying drawings, which illustrate several embodiments of the invention. It should be understood, however, that the present invention may be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present invention more complete, and The protection scope of the present invention is fully explained to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide still further embodiments.

It should be understood that the same reference numerals refer to the same elements throughout the drawings. In the drawings, the dimensions of certain features may be varied for clarity.

It should be understood that the terms in the specification are only used to describe specific embodiments, and are not intended to limit the present invention. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

As used in this specification, the singular forms "a", "the" and "the" include the plural forms unless clearly indicated otherwise. The terms "comprising", "including" and "containing" are used in the specification to indicate the presence of a claimed feature, but not to exclude the presence of one or more other features. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items. The terms "between X and Y" and "between about X and Y" used in the specification should be construed to include both X and Y. As used in this specification, the phrase "between about X and Y" means "between about X and about Y," and as used in this specification, the phrase "from about X to Y" means "from about X to Y" to about Y".

In the specification, when an element is referred to as being "on", "attached" to, "connected" to, "coupled" to, or "contacting" another element, etc. The element may be directly on, attached to, connected to, coupled to, or in contact with another element, or intervening elements may be present. In contrast, an element is referred to as being "directly on" another element, "directly attached" to another element, "directly connected" to another element, "directly coupled" to another element or, or "directly coupled" to another element. When directly contacting" another element, there will be no intervening elements. In the specification, a feature is arranged "adjacent" to another feature, which can mean that one feature has a portion that overlaps an adjacent feature or a portion that is above or below an adjacent feature.

In the specification, spatially relative terms such as "up," "down," "left," "right," "front," "rear," "high," "low," etc. may describe one feature versus another relationship in the attached drawing. It should be understood that spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. For example, when the device in the figures is turned over, features previously described as "below" other features may now be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) in which case the relative spatial relationships will be interpreted accordingly.

The radiating elements according to the embodiments of the present invention can be applied to various types of base station antennas, for example, can be applied to multi-band base station antennas or multiple-input multiple-output antennas.

Some embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

Referring to Figures 1 and 2, Figure 1 shows a schematic perspective view of a base station antenna 100 according to some embodiments of the present invention; Figure 2 shows a schematic front view of an antenna assembly 200 in the base station antenna 100 of Figure 1 .

As shown in FIG. 1, the base station antenna 100 is an elongated structure extending along a longitudinal axis L. As shown in FIG. The base station antenna 100 may have a tubular shape with a generally rectangular cross-section. The base station antenna 100 includes a radome 110 and a top end cap 120 . In some embodiments, radome 110 and tip cap 120 may comprise a single integral unit, which may aid in waterproofing. One or more mounting brackets 150 are provided on the rear side of the radome 110, which can be used to mount the base station antenna 100 to an antenna bracket 150 (not shown), such as on an antenna tower. The base station antenna 100 also includes a bottom end cap 130 that includes a plurality of connectors 140 mounted therein. The base station antenna 100 is typically mounted in a vertical fashion (ie, when the base station antenna 100 is in normal operation, the longitudinal axis L may be substantially perpendicular to the plane defined by the horizon).

As shown in FIG. 2 , the base station antenna 100 includes an antenna assembly 200 that is slidably inserted into the radome 110 . The antenna assembly 200 includes a reflector 210 (or a reflector plate) and a plurality of radiating elements 300 mounted on the reflector 210 . The reflector 210 may serve as a ground plane structure for the radiating element 300 . The radiating element 300 is mounted to extend forward (along the forward direction F) from the reflector 210 . The radiating element 300 may include a low-band radiating element and a high-band radiating element, with the low-band radiating element extending farther forward than the high-band radiating element. The low-band radiating element may be configured to transmit and receive RF signals in a first frequency band, eg, in the 617-960 MHz frequency range or a portion thereof. The high-band radiating element may be configured to transmit and receive RF signals in a second frequency band, eg, in the 1427-2690 MHz frequency range or a portion thereof.

In the embodiment of FIG. 2 , the low-band radiating elements 300 may be arranged in two vertical columns to form two vertically extending linear arrays of low-band radiating elements 300 . The high-band radiating elements (represented by simplified crosses) may also be arranged in two vertical columns to form two vertically extending linear arrays of high-band radiating elements. In other embodiments, more than two linear arrays of low-band radiating elements 300 and/or high-band radiating elements may also be provided.

In some embodiments, each linear array 220 may extend along substantially the entire length of the base station antenna 100 . In other embodiments, each linear array 220 may also extend only partially along the length of the base station antenna 100 . Each of these linear arrays 220 may extend along a vertical direction V, which may be the direction of or parallel to the longitudinal axis L of the base station antenna 100 . This vertical direction V is perpendicular to the horizontal direction H and the forward direction F (see FIG. 1 ).

Next, the radiating element 300 according to some embodiments of the present invention will be described in more detail with reference to FIGS. 3 to 7 .

3 to 7, FIG. 3 shows a schematic perspective view of a radiating element 300 according to some embodiments of the present invention; FIG. 4 shows a schematic exploded view of the radiating element 300 in FIG. 3; FIG. 5 shows FIG. 3 Figure 6 shows a schematic front view of the radiating element 300 in Figure 3; Figure 7 shows a schematic side view of the radiating element 300 in Figure 3.

The radiating element 300 may comprise a dipole radiator made of sheet metal or sheet metal. Herein, such a dipole radiator may be referred to as a "sheet metal radiator". Sheet metal radiators are advantageous over printed circuit board based dipole radiators: first, they are less expensive; second, sheet metal radiators can be of any desired thickness and can exhibit Improved impedance matching and/or reduced signal transmission loss; third, sheet metal radiators can be easily achieved with lower levels of surface roughness and can exhibit improved passive intermodulation ("PIM") distortion performance .

The radiating element 300 may be constructed as a low-band radiating element, which may be configured to transmit and receive RF signals in a frequency band such as the 617-960 MHz frequency range or a portion thereof. The radiating element 300 may be configured as a broadband radiating element.

FIG. 3 shows a radiating element 300 mounted on a printed circuit board feeder 230 . The feed plate 230 may include an RF transmission line feed 240 that transmits RF signals to the radiating element 300 via the transmission line.

3, 4 and 6, the radiating element 300 includes a cross-dipole radiator, a conductive structure, and a feed line.

The cross-dipole radiator of the radiating element 300 has a first radiator 310 and a second radiator 320, the first radiator 310 includes a first dipole arm 310-1 and a second dipole extending along a first axis m, respectively The arm 310-2, the second radiator 320 comprises a third dipole arm 320-1 and a fourth dipole arm 320-2 respectively extending along a second axis n, the first axis m being substantially perpendicular to the second axis n .

The radiating element 300 may include four conductive structures 330-1 to 330-4. The first dipole arm 310-1 of the first radiator 310 may be mounted on the first conductive structure 330-1, and the second dipole arm 310-2 of the first radiator 310 may be mounted on the first conductive structure 330- 1 on the opposite second conductive structure 330-2. The third dipole arm 320-1 of the second radiator 320 may be mounted on the third conductive structure 330-3, and the fourth dipole arm 320-2 of the second radiator 320 may be mounted on the third conductive structure 330- 3 on the opposite fourth conductive structure 330-4.

Each conductive structure 330 may be configured as a bent metal plate structure, eg, an L-shaped metal plate structure. Each L-shaped sheet metal structure can be made, for example, from two sheet metal sheets arranged perpendicular to each other. Each conductive structure may, for example, have a length (along the forward direction F) of approximately one quarter of the wavelength corresponding to the center frequency point of the operating frequency band of the radiating element 300 . Each conductive structure is configured to support a dipole arm on one side and to be mounted on the feeder plate 230 and electrically connected to the ground plane of the feeder plate 230 on the other side.

Two adjacent conductive structures 330 may be arranged with each other such that four conductive structures 330 may form a substantially cross shape. One feed gap 340 is provided between each pair of adjacent conductive structures, thereby forming four feed gaps 340 . Feed lines may intervene into corresponding feed gaps 340 to feed the dipole arms.

It should be understood that the conductive structure 330 may have any other suitable shape. In some embodiments, each conductive structure 330 may be coupled to the reflector 210 . For example, on the end of the conductive structure 330 close to the reflector 210 , the conductive structures 330 may be connected together through a connection structure, and then electrically connected to the reflector 210 in common. In other embodiments, each conductive structure may also be electrically connected to the reflector 210 through a corresponding connection structure. The shape of the connecting structure can be various, for example, it can be disc-shaped, cylindrical, prismatic and so on.

The radiating element 300 may include a first feed line 350 and a second feed line 360 . A schematic view of the first feed line 350 of the radiating element can be seen from FIG. 5 . The first feeder 350 may be configured as a hook-shaped feeder, the hook-shaped feeder includes a first section 354 , a second section 355 and a third section 356 , the third section 356 is substantially the same as the first section 354 Parallel to the top, the second section 355 connects the first section 354 and the third section 356 . The second section 355 includes an upwardly protruding middle portion. The second feeder 360 may be the same as the first feeder 350 except that the second feeder 360 may include a downwardly protruding middle portion such that the first and second feeders 350 and 360 may cross without touching each other. The two hooked feeders 350, 360 may be mounted crosswise to each other, eg, arranged approximately 90 degrees offset, wherein the first section 354 and the third section 356 of each hooked feeder 350, 360 may be placed in In the two substantially 180-degree opposite feed gaps 340, the first section 354 and the third section 356 of each hook feed line can be respectively arranged as a strip line section in two adjacent conductive between structures 330.

The first section 354 of the first feed line 350 (hereinafter also referred to as the first stripline section) may be arranged in the first feed gap between the first conductive structure 330-1 and the fourth conductive structure 330-4 340, so that the first stripline section can be configured to feed the first polarized radio frequency signal to the first dipole arm 310-1 and the fourth dipole arm 320-2; the third section of the first feed line 350 A segment 356 (hereinafter also referred to as a second stripline segment) may be arranged within the second feed gap 340 between the second conductive structure 330-2 and the third conductive structure 330-3, whereby the second stripline The segments may be configured to feed the second dipole arm 310-2 and the third dipole arm 320-1 with a radio frequency signal of the first polarization. Similarly, a first section 354 (hereinafter also referred to as a third stripline section) of a second feeder 360 that is installed crosswise with the first feeder 350 , eg, 90-degree offset, may be arranged on the first conductive structure 330 -1 and the third conductive structure 330-3 within the third feed gap 340 so that the third stripline section can be configured to feed the first dipole arm 310-1 and the third dipole arm 320-1 A second polarized radio frequency signal is fed; the third section 356 of the second feed line 360 (hereinafter also referred to as the fourth stripline section) may be arranged in the second conductive structure 330-2 and the fourth conductive structure 330- 4, so that the fourth stripline section can be configured to feed the second polarized radio frequency signal to the second dipole arm 310-2 and the fourth dipole arm 320-2.

According to the radiating element 300 of the embodiment of the present invention, the feed lines 350 and 360 may be electrically connected to the transmission lines on the feed plate 230, respectively. The feed lines 350 , 360 may, for example, be soldered at the lower ends of their first sections 354 to corresponding pads on the feed plate 230 which are electrically connected to the RF transmission line feed 240 via transmission lines. Thus, the first feed line 350 may be configured to receive a first polarization (eg +45° polarization) radio frequency signal from the first RF transmission line feed and feed it to the first radiator 310 and the second radiator 320. Similarly, the second feed line 360 may be configured to receive a second polarization (eg, +45° polarization) radio frequency signal from the second RF transmission line feed and feed it to the first radiator 310 and the second radiator 320. In other embodiments, the feed lines 350, 360 may also pass through the feed plate 230 and be electrically connected to the inner conductor of the cable.

6 , the first feed line 350 and the second feed line 360 may form a first cross pattern, the first axis m of the first radiator 310 and the second axis n of the second radiator 320 may form a second cross pattern, Here, the first cross pattern is rotated by, for example, approximately 45° with respect to the second cross pattern. Both the first and second feed lines 350, 360 can be electrically coupled to the four dipole arms via corresponding stripline sections, thereby simultaneously feeding the four dipole arms with RF signals, the four dipole arms acting together A first polarization effect and/or a second polarization effect is achieved.

According to the radiating element 300 of the embodiment of the present invention, when the feed line for the first polarization is excited, all four dipole arms participate in radiation. In some embodiments, the first radiator 310 of the radiating element 300 may extend horizontally, and the second radiator 320 of the radiating element 300 may extend vertically. When the feeder is excited, the horizontally extending first radiator 310 and the vertically extending second radiator 320 can participate in radiation at the same time, and the required polarization can be synthesized in the +/-45 degree direction through vector synthesis, so as to achieve +/-45 degree polarization effect.

In some embodiments, the radiating element 300 may operate as a low-band radiating element 300, in a multi-band multi-array antenna (eg, an antenna with two low-band linear arrays and two high-band linear arrays), the low-band radiating element The horizontal and vertical extension of the dipole arms of 300 is advantageous: as this reduces or eliminates situations where the dipole arms of the low-band radiating element extend above the high-band radiating element. Reducing the area of the part of the high-band radiating element directly below the low-band radiating element is beneficial to reduce the scattering effect of the low-band radiating element 300 on the high-band antenna beam. In addition, the reduced coverage area can also reduce the radiated energy loss of the high-band linear array. Secondly, the high-band radiating element can be further spaced apart from the low-band radiating element 300, thereby reducing coupling interference therebetween.

Next, the design of the radiator of the radiating element 300 according to some embodiments of the present invention will be described in more detail with reference to FIGS. 6 and 7 .

As shown in FIG. 6 , each of the dipole arms 310 - 1 , 310 - 2 , 320 - 1 , 320 - 2 may be configured as an annular shape including at least one narrow arm section 370 and at least one widened arm section 380 , respectively arm. Each annular arm may include two conductive paths, a first conductive path forming one half of a generally elongated dipole arm and a second conductive path forming the other half of the dipole arm. The elongated dipole arm can be understood as: the length of each dipole arm 310-1, 310-2, 320-1, 320-2 is significantly greater than its width. In some embodiments, the length of the dipole arm is divided by The lower limit of the quotient of its width is: 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4 or 5. In some embodiments—such as in narrow antennas with two low-band linear arrays and two high-band linear arrays, the width may be, for example, less than 430mm, 400mm, 380mm, or even 360mm—one low-band radiating element 300 and The coverage area of the lower high-band radiating element in the forward direction may be, for example, less than 0.5, 0.4, 0.3, 0.2, 0.1 of the area of the dipole arm of the low-band radiating element 300 . It is also possible that there is no coverage area between the low-band radiating element 300 and the high-band radiating element in the forward direction.

Each conductive path may include a metal pattern consisting of widened arm segments 380 and narrowed arm segments 370 . The narrow arm section 370 may be configured as a curved arm section to increase its path length, thereby facilitating the compactness of the radiating element 300 and/or the desired filtering effect with respect to high frequency band radiation. The widened arm section 380 may have a first width and the narrowed arm section 370 may have a second width. The first width of each widened arm section 380 and the second width of each narrowed arm section 370 need not be the same. Therefore, in some cases, reference is made to the average width of the widened arm section 380 and the narrowed arm section 370 . The average width of each widened arm section 380 may be, for example, at least twice the average width of each narrowed arm section 370 . In other cases, the average width of each widened arm section 380 may be, for example, at least three, four, five, six, eight or ten times the average width of each narrow arm section 370 .

The first conductive path and the second conductive path are spaced apart from each other at least over subsections, ie there is a gap between the first conductive path and the second conductive path. In some cases, the gap between the first widened arm section 380 of the first conductive path and the second widened arm section 380 of the opposite second conductive path may be the width of the widened arm section 380 . 2.5, 2, 1.75, 1.5, 1.25, 1 or 0.5 times the width. The smaller gap facilitates the realization of elongated dipole arms and thus contributes to the compactness of the radiating element 300 .

In addition, the curved narrow arm section 370 can be implemented as a non-linear conductive section, which can act as a high impedance portion to interrupt current flow in the high frequency range that might otherwise be induced on its own dipole arm. In this way, the narrow arm section 370 can reduce the high-band current induced on the low-band radiating element 300, thereby further reducing the scattering effect of the low-band radiating element 300 on the high-band radiating element. The narrow arm section 370 can make the low-band radiating element 300 almost invisible to the high-band radiating element, thus giving the low-band radiating element 300 a stealth function. The low-band radiating element 300 with stealth function is advantageous, the less the high-band current is induced on the dipole arm of the low-band radiating element 300, the smaller the radiation pattern characteristic of the linear array 220 of the high-band radiating element is. the smaller the impact.

In some embodiments, all four dipole arms of radiating element 300 may lie in a common plane that is substantially parallel to the plane defined by reflector 210 . The conductive structures of the radiating element 300 may extend in a direction generally perpendicular to the plane defined by the dipole arms.

In other embodiments, all four dipole arms of radiating element 300 may be formed as non-planar elements. 3 and 4, the widened arm section 380 of the dipole arm may include a horizontally extending first widened arm subsection 380-1 (see FIG. 4) and a first widened arm subsection 380-1 extending from the first widened arm subsection 380-1. A vertically extending second widened arm subsection 380-2 (see Figure 4) extends out. In other embodiments, the second widened arm subsection 380-2 does not need to be perpendicular to the first widened arm subsection 380-1, for example, the second widened arm subsection 380-2 is inclined at a certain angle ( such as 45 degrees, 60 degrees, 80 degrees, etc.) connected to the first widened arm subsection 380-1. In addition, the first widened arm subsection 380-1 and/or the second widened arm subsection 380-2 may also have different shapes than those shown, for example, they may be configured as trapezoidal conductive sections, Triangular conductive segments, etc. Implementing the radiating element 300 as a non-planar dipole arm enables the dipole arm to have a desired electrical length while reducing the "footprint" of each radiator (ie, the size of the radiator when viewed from the front of the antenna), Therefore, the miniaturization of the radiating element 300 can be further promoted, thereby reducing the coverage area of the low-band radiating element 300 and the high-band radiating element in the forward direction.

Next, a modification of the radiating element 300 according to some embodiments of the present invention will be introduced with reference to FIG. 8 .

As shown in FIG. 8, the radiating element 300 includes a cross-dipole radiator and a cross-feed structure. The cross-feed structure of the radiating element 300 includes a first feed structure 410 and a second feed structure 420 cross-bonded therewith. The first feeding structure 410 and the second feeding structure 420 may each be constituted by one printed circuit board, eg, a multi-layer printed circuit board. The first feeding structure 410 has a first engaging groove on its end away from the reflector 210, and the second feeding structure 420 has a second engaging groove on its end close to the reflector 210, by means of these two engaging The slot, the first feeding structure 410 and the second feeding structure 420 may be cross-bonded with each other.

In the embodiment of FIG. 8 , each feeding structure can be formed as a double-layer printed circuit board, and the double-layer printed circuit board includes: a metal pattern in the middle, two ground layers on both sides, and a ground layer and a metal layer. Dielectric layer between patterns. The metal pattern in the middle comprises the feed lines (indicated by dashed lines in the figure), which are thus constituted as stripline feed lines. The first feed structure 410 has a first feed line 430 and the second feed structure 420 has a second feed line 440 . The first feeder 430 and the second feeder 440 may be configured as substantially hook-shaped feeders. The first feeder 430 and the second feeder 440 include a first section 434, a second section 435, and a third section 436, which may be in the first half of the respective feed structure, the third Section 436 may be in the second half of the corresponding feed structure, third section 436 may be substantially parallel to first section 434, and second section 435 then connects first section 434 and third section 436 .

Furthermore, as shown in FIG. 8 , the cross-feed structure includes a total of a plurality of protrusions 450 respectively on the ends of each feed structure half that are remote from the reflector 210 . These protrusions 450 may be configured as cross-dipole radiators for mounting the radiating element 300 . For the design scheme of the cross-dipole radiator of the radiating element 300, reference may be made to the above-mentioned related content in this document, and details are not repeated here. In other embodiments, the cross-dipole radiator can also be designed as a PCB-based cross-dipole radiator.

In order to mount the cross-dipole radiator of the radiating element 300, the extension 450 may have metal areas 460 on both sides thereof, respectively, which may be part of the ground plane of the printed circuit board. The first dipole arm 310-1 of the first radiator 310 may be connected to the protrusion 450 of the first half 410-1 of the first feeding structure 410 and the first half 420-1 of the second feeding structure 420, respectively. The protruding portion 450 of The protruding part 450 of the second half 420-2 of the structure 420 is welded; the third dipole arm 320-1 of the second radiator 320 can be respectively connected with the second half 410-2 of the first feeding structure 410 The protruding part 450 is welded with the protruding part 450 of the first half 420-1 of the second feeding structure 420; the fourth dipole arm 320-2 of the second radiator 320 can be respectively connected with the first feeding structure 410 The protruding portion 450 of the first half 410 - 1 and the protruding portion 450 of the second half 420 - 2 of the second feeding structure 420 are welded together.

Accordingly, the first section 434 of the first feed line (as the first stripline section) may be configured to feed the first polarized radio frequency to the first dipole arm 310-1 and the fourth dipole arm 320-2 signal; the third section 436 of the first feed line (as the second stripline section) may be configured to feed the second dipole arm 310-2 and the third dipole arm 320-1 with a first polarized radio frequency Signal. Similarly, the first section 434 of the second feed line (as a third stripline section) may be configured to feed the first dipole arm 310-1 and the third dipole arm 320-1 with a second polarization RF signal; the third section 436 of the second feed line (as the fourth stripline section) may be configured to feed the second dipole arm 310-2 and the fourth dipole arm 320-2 with a second polarization radio frequency signal.

In the embodiment of FIG. 8 , the first feed line and the second feed line form a first cross pattern, and the first axis m of the first radiator 310 and the second axis n of the second radiator 320 may form a second cross pattern, wherein the first intersecting pattern is rotated approximately 45° relative to the second intersecting pattern. Each feed line can be electrically coupled with four dipole arms, thereby feeding radio frequency signals to the four dipole arms at the same time, and the four dipole arms can achieve the first polarization effect and/or the second polarization effect under the joint action .

Each feeder line may be electrically connected to a transmission line on the feeder plate 230, respectively. Each feeder line may, for example, be soldered at the lower end of its first section 436 to a corresponding pad on the feeder plate 230 which is electrically connected to the RF transmission line feed 240 via a transmission line. Thus, the first feed line may be configured to receive a first polarization (eg +45° polarization) radio frequency signal from the first RF transmission line feed 240 and feed it to the first radiator 310 and the second radiator 320. Similarly, the second feed line may be configured to receive a second polarization (eg, +45° polarization) radio frequency signal from the second RF transmission line feed 240 and feed it to the first radiator 310 and the second radiator 320.

FIG. 9 shows a schematic diagram of another variant of an antenna assembly 200 . Two different types of low-band radiating element arrays 220 are used in this variation to provide enhanced isolation (eg, homopolar isolation between low-band arrays).

As shown in FIG. 9 , the antenna assembly 200 includes a first array 220 of low-band radiating elements 300 and a second array 220 of low-band radiating elements 400 . The array 220 of the first low frequency band radiating elements 300 may include a plurality of first radiating elements 300 according to various embodiments of the present invention. The second low-band radiating element 400 array 220 may include a plurality of second radiating elements in the form of: a third radiator extending obliquely at +45° and a fourth radiating radiator extending obliquely at -45° The third radiator has a fifth dipole arm and a sixth dipole arm, and the fourth radiator has a seventh dipole arm and an eighth dipole arm. In order to improve their stealth performance, the fifth dipole arm and the sixth dipole arm may include narrow arm sections and widened arm sections, respectively; the seventh dipole arm and the eighth dipole arm may include narrow arm sections, respectively and widened arm sections.

As shown in FIG. 9 , the first radiating elements 300 may be arranged adjacent to the second radiating elements in the horizontal direction. It should be understood that the first array 220 of low frequency band radiating elements 300 and the second array 220 of low frequency band radiating elements 400 may be designed to be vertically aligned with each other. In other embodiments, the first array 220 of low-band radiating elements 300 and the second array 220 of low-band radiating elements 400 may be designed to be staggered from each other, that is, the feeding points of the radiating elements 300 and 400 occur in the vertical direction V Staggered, i.e. no longer aligned horizontally. Thus, the spatial distance between radiators of the same polarization of adjacent radiating elements 300 is increased, so as to improve the isolation.

Since the tips of the horizontally extending dipole arms of the radiating element 300 according to various embodiments of the present invention point to the area between the two radiators of the second radiating element 400, the physical interaction between the radiating elements of the two arrays is increased. distance.

Although exemplary embodiments of the present disclosure have been described, it should be understood by those skilled in the art that various changes and modifications can be made in the exemplary embodiments of the present disclosure without materially departing from the spirit and scope of the present disclosure. Accordingly, all changes and modifications are included within the scope of protection of the present disclosure as defined by the claims. The disclosure is defined by the appended claims, with equivalents of the claims to be included.

Claims (39)

1. A radiating element, characterized in that the radiating element comprises:

a first radiator having a first dipole arm and a second dipole arm, wherein the first and second dipole arms comprise a narrow arm segment and a widened arm segment, respectively;

a second radiator having a third dipole arm and a fourth dipole arm, wherein the third and fourth dipole arms comprise a narrow arm segment and a widened arm segment, respectively;

a first feed line configured to feed a first polarized radio-frequency signal to the first, second, third and fourth dipole arms; and

a second feed line configured to feed the first, second, third and fourth dipole arms with radio-frequency signals of a second polarization.

2. The radiating element of claim 1,

the first feed line includes a first strip line segment configured to feed the first and fourth dipole arms with radio frequency signals of a first polarization and a second strip line segment configured to feed the second and third dipole arms with radio frequency signals of the first polarization; and is

The second feed line includes a third strip line segment configured to feed the first and third dipole arms with radio frequency signals of the second polarization and a fourth strip line segment configured to feed the second and fourth dipole arms with radio frequency signals of the second polarization.

3. The radiating element of claim 2,

the radiating element includes:

a first conductive structure, the first dipole arm being mounted on the first conductive structure;

a second conductive structure, the second dipole arm being mounted on the second conductive structure;

a third conductive structure, the third dipole arm being mounted on the third conductive structure; and

a fourth conductive structure, the fourth dipole arm being mounted on the fourth conductive structure.

4. The radiating element of claim 3,

the first stripline segment is disposed in a feed gap between the first and fourth conductive structures, and the second stripline segment is disposed in a feed gap between the second and third conductive structures; and is

The third stripline segment is disposed in a feed gap between the first and third conductive structures, and the fourth stripline segment is disposed in a feed gap between the second and fourth conductive structures.

5. The radiating element according to one of claims 1 to 4,

each dipole arm comprises a first and a second conductive path, respectively, comprising at least one narrow arm segment and at least one widened arm segment, respectively.

6. The radiating element of claim 5, wherein the first conductive path and the second conductive path form a conductive loop.

7. The radiating element of one of claims 1 to 4, wherein the quotient of the length of each dipole arm divided by its width has a lower limit value of: 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4 or 5.

8. The radiating element of one of claims 1 to 4, wherein at least one widened arm segment in each dipole arm is a non-planar widened segment, the widened arm segment comprising a first widened arm sub-segment extending in a first direction and a second widened arm sub-segment extending away from the first widened arm sub-segment in a second direction, wherein the second direction is different from the first direction.

9. The radiating element of claim 8, wherein the second direction makes an angle between 80 degrees and 100 degrees with the first direction.

10. The radiating element according to one of claims 1 to 4, characterized in that the length of each radiator is between 150 and 200 mm.

11. The radiating element according to one of claims 1 to 4, characterized in that the length of each radiator is between 170 mm and 180 mm.

12. The radiating element of one of claims 1 to 4, wherein each dipole arm is configured as a sheet metal part arm or a PCB-based arm.

13. The radiating element according to one of claims 2 to 4, characterized in that the first feed line and the second feed line are each designed as a hook-shaped feed line.

14. The radiating element of claim 13, wherein the first feed line and the second feed line each include a first stripline segment, a second stripline segment, and a feed segment between the first and second stripline segments.

15. The radiating element according to one of claims 1 to 4,

the first and second feed lines form a first crossing pattern, and the first and second radiators form a second crossing pattern, wherein the first crossing pattern is rotated at an angle with respect to the second crossing pattern.

16. The radiating element of claim 15, wherein the first crossing pattern is rotated 45 ° relative to the second crossing pattern.

17. The radiating element of claim 3 or 4,

each conductive structure is electrically connected with the grounding layer of the feed board, and the radiating element is arranged on the feed board; or

Each conductive structure is coupled to the reflector.

18. The radiating element according to one of claims 1 to 4,

the first feeder line and the second feeder line are respectively and electrically connected with a transmission line on the feeder panel, and the radiating element is installed on the feeder panel; or

The first feeder line and the second feeder line are electrically connected to the inner conductors of the cables, respectively.

19. The radiating element according to one of claims 1 to 4,

the first polarization is +45 ° polarization and the second polarization is-45 ° polarization.

20. A radiating element according to claim 3, wherein the first feed line is mounted on a dielectric element, the dielectric element being between the conductive structure and the first feed line.

21. The radiating element according to claim 2, characterized in that the radiating element comprises a first feed structure and a second feed structure, the first feed structure having a first joining slot on its end remote from the reflector and the second feed structure having a second joining slot on its end close to the reflector, by means of which the first and second feed structures cross-join each other.

22. The radiating element of claim 21, wherein the first and second feed structures are each formed as a multilayer printed circuit board.

23. The radiating element of claim 21 or 22,

the first feeding structure includes: the first metal pattern, two ground layers on two sides of the first metal pattern and two dielectric layers between the ground layers and the first metal pattern respectively, wherein the first metal pattern comprises the first feed line; and

the second feeding structure includes: the second metal pattern, the ground layer on both sides of the second metal pattern, and the dielectric layer between the ground layer and the second metal pattern, wherein the second metal pattern includes the second feed line.

24. The radiating element of claim 23, wherein the first and second feed structures comprise first and second halves, respectively, the first stripline segment being in the first half of the first feed structure and the second stripline segment being in the second half of the first feed structure; the third stripline segment is in the first half of the second feed structure and the fourth stripline segment is in the second half of the second feed structure.

25. The radiating element of claim 24, wherein the first half and the second half have extensions on ends remote from the reflector, the extensions configured to mount the first radiator and the second radiator of the radiating element.

26. The radiating element of claim 25, wherein the extension has a metal region on each side, the metal region being part of the ground plane of the respective feed structure, the first dipole arm being welded to the extension of the first half of the first feed structure and the extension of the first half of the second feed structure, respectively; the second dipole arm is welded to the protruding portion of the second half of the first feed structure and the protruding portion of the second half of the second feed structure, respectively; the third dipole arm is welded to the protruding portion of the second half of the first feed structure and the protruding portion of the first half of the second feed structure, respectively; the fourth dipole arm may be welded to the overhang of the first half of the first feed structure and the overhang of the second half of the second feed structure, respectively.

27. The radiating element according to claim 1 or 2, characterized in that the first radiator is configured as a vertically extending radiator and the second radiator is configured as a horizontally extending radiator.

28. The radiating element of claim 1 or 2, wherein the radiating element is configured to operate in the 617-960MHz frequency range or a part thereof.

29. A radiating element, characterized in that the radiating element comprises:

a first radiator having a first dipole arm and a second dipole arm;

a second radiator having a third dipole arm and a fourth dipole arm;

a first feed line configured to feed +45 ° polarized radio frequency signals to the first, second, third and fourth dipole arms; and

a second feed line configured to feed the first, second, third and fourth dipole arms with-45 ° polarized radio frequency signals,

wherein each dipole arm comprises a first and a second conductive path comprising at least one narrow arm section and at least one widened arm section, respectively, wherein the first and the second conductive path form a conductive loop.

30. The radiating element of claim 29, wherein the quotient of the length of each dipole arm divided by its width has a lower limit value of: 1.5, 1.75, 2, 2.25, 2.5, 3, 3.5, 4 or 5.

31. The radiating element of claim 29 or 30, wherein at least one widened arm segment in each dipole arm is a non-planar widened segment, the widened arm segment comprising a first widened arm sub-segment extending in a first direction and a second widened arm sub-segment extending away from the first widened arm sub-segment in a second direction, wherein the second direction is different from the first direction.

32. The radiating element of claim 31, wherein the second direction makes an angle between 80 degrees and 100 degrees with the first direction.

33. The radiating element of claim 29 or 30, wherein the upper limit of the quotient of the area covered by one low-band radiating element and the underlying high-band radiating element in the forward direction divided by the area of the dipole arms of the low-band radiating element is: 0.5, 0.4, 0.3, 0.2, 0.1 or 0.

34. An antenna assembly comprising a reflector and an antenna array mounted on the reflector, the antenna array comprising a plurality of vertically extending arrays, characterized in that the plurality of vertically extending arrays comprises a first array comprising a plurality of first radiating elements, wherein the first radiating elements comprise:

a vertically extending first radiator having a first dipole arm and a second dipole arm, wherein the first and second dipole arms comprise a narrow arm segment and a widened arm segment, respectively;

a horizontally extending second radiator having a third dipole arm and a fourth dipole arm, wherein the third and fourth dipole arms comprise a narrow arm segment and a widened arm segment, respectively;

a first feed line configured to feed a first polarized radio-frequency signal to the first, second, third and fourth dipole arms; and

a second feed line configured to feed the first, second, third and fourth dipole arms with radio-frequency signals of a second polarization.

35. The antenna assembly of claim 34, wherein the plurality of vertically extending arrays comprises a second array comprising a plurality of second radiating elements, wherein the second radiating elements comprise:

a third radiator extending obliquely at +45 °, said third radiator having a fifth dipole arm and a sixth dipole arm;

-a fourth radiator extending at an inclination of 45 °, said fourth radiator having a seventh dipole arm and an eighth dipole arm.

36. The antenna assembly of claim 35, characterized in that the fifth and sixth dipole arms comprise respectively narrow arm segments and widened arm segments, and in that the seventh and eighth dipole arms comprise respectively narrow arm segments and widened arm segments.

37. An antenna assembly according to claim 35 or 36, characterized in that the first radiating element of the first array is arranged adjacent to the second radiating element of the second array in the horizontal direction.

38. The antenna assembly of one of claims 34 to 36, characterized in that the first radiating element is constituted as a radiating element according to one of claims 2 to 33.

39. Base station antenna, characterized in that it comprises a radiating element according to one of claims 1 to 32 or an antenna assembly according to one of claims 33 to 38.

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