EP2030285A2 - Antenne dipôle à microbande à résonances multiples - Google Patents

Antenne dipôle à microbande à résonances multiples

Info

Publication number
EP2030285A2
EP2030285A2 EP07840256A EP07840256A EP2030285A2 EP 2030285 A2 EP2030285 A2 EP 2030285A2 EP 07840256 A EP07840256 A EP 07840256A EP 07840256 A EP07840256 A EP 07840256A EP 2030285 A2 EP2030285 A2 EP 2030285A2
Authority
EP
European Patent Office
Prior art keywords
dipole
dipole element
gap
dielectric
component
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP07840256A
Other languages
German (de)
English (en)
Other versions
EP2030285A4 (fr
Inventor
Lowell L Loyet
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Mobility II LLC
Original Assignee
AT&T Mobility II LLC
Cingular Wireless II LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/424,664 external-priority patent/US7277062B1/en
Priority claimed from US11/424,639 external-priority patent/US7630696B2/en
Priority claimed from US11/424,614 external-priority patent/US7764245B2/en
Application filed by AT&T Mobility II LLC, Cingular Wireless II LLC filed Critical AT&T Mobility II LLC
Publication of EP2030285A2 publication Critical patent/EP2030285A2/fr
Publication of EP2030285A4 publication Critical patent/EP2030285A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H01P1/2138—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies using hollow waveguide filters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P11/00—Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
    • H01P11/007—Manufacturing frequency-selective devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/061—Two dimensional planar arrays
    • H01Q21/062—Two dimensional planar arrays using dipole aerials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/18—Vertical disposition of the antenna

Definitions

  • the subject matter provides a multi-band antenna for use, for example, in a wireless communications network.
  • the multi-band antenna employs multi- resonant microstrip dipoles that resonate at multiple frequencies due to microstrip "islands." Gaps in the microstrips create an open RF circuit except for desired frequencies. At the desired frequency, RF energy sees a gap as a short circuit between an island and the rest of a dipole antenna, thus, resonating at the desired frequency.
  • the multi-band antenna includes first, second, third, and fourth dipole elements.
  • the first dipole element is on a first side of a dielectric and the second dipole element is on a second side of the dielectric and oriented with respect to the first dipole element so as to form a first dipole.
  • the third dipole element is also on the first side of the dielectric and is linearly displaced from the first dipole element in a direction parallel to the orientation of the first dipole wherein the displacement creates a gap between the first dipole element and the third dipole element.
  • the fourth dipole element is on the second side of the dielectric linearly and is displaced from the second dipole element in a direction parallel to the orientation of the first dipole and opposite of the direction of displacement of the third dipole element from the first dipole element wherein the displacement creates a gap between the second dipole element and the fourth dipole element.
  • the gaps between the first and third dipole elements and the second and fourth dipole elements are sufficiently small that the first, second, third, and fourth dipole elements form a second dipole having a corresponding dipole wavelength longer than that of the first dipole.
  • FIG. 1 is a block diagram of a multi-band antenna system in accordance with an aspect of an embodiment.
  • FIG. 2 depicts a side view of a multi-band antenna in accordance with an aspect of an embodiment.
  • FIGs. 3A and 3B depict the two sides of the multi-band antenna in accordance with an aspect of an embodiment.
  • FIG. 4 depicts a side view of the multi-band antenna oriented ninety degrees away from the view depicted in FIG. 2 in accordance with an aspect of an embodiment.
  • FIG. 5 depicts a diagram illustrating a multi-band antenna encased in a radome in accordance with an aspect of an embodiment.
  • FIG. 6 depicts radiation patterns of a multi-band antenna with and without a parasitic element in accordance with an aspect of an embodiment.
  • FIG. 7 depicts a system diagram illustrating a communication system in accordance with an aspect of an embodiment.
  • FIG. 1 a block diagram of a multi-band antenna system 100 in accordance with an aspect of an embodiment is shown.
  • the multi-band antenna system 100 is comprised of a multi-band antenna 102 that can transmit and/or receive different wavelengths, ⁇ , from a shorter ⁇ frequency transceiver 104 and from a longer ⁇ frequency transceiver 106.
  • Dipole elements of the multi-band antenna 102 employ "gaps" in the dipole elements that tune the dipole elements to see more than one desired wavelength (i.e., frequency). Wavelengths, with sufficient length, "jump" the gap and resonate the dipole element at the longer wavelength. In this manner, the dipole element acts like a multi-band dipole element.
  • a single multi-band antenna 102 can replace multiple antennas that can only operate at a given frequency and/or can increase communication frequency bands when antenna installation space is limited. This provides a very cost effective and space effective alternative to multiple antenna installations.
  • FIG. 2 a side view of a multi-band antenna 200 in accordance with an aspect of an embodiment is depicted.
  • the multi-band antenna 200 can be employed as, for example, one of the plurality of towers 730 depicted in FIG. 7.
  • the multi-band antenna 200 is a microstrip multi-band collinear array with dipole elements 201-204 and 211-214 arranged on both sides of serial feedlines 250 and 252 and both sides of a dielectric material 260.
  • the dielectric material 260 can be any RF dielectric such as, for example, a PTFE (polytetrafluoroethylene)/fiberglass composite.
  • Serial feedlines (also referred to as microstrips) 250 and 252 and dipole elements 201-204 and 211-214 are constructed from a metal such as, for example, copper and the like.
  • a pattern is etched and/or otherwise formed into each side of the dielectric material 260 corresponding to the locations of the serial feedlines 250 and 252 and the dipole elements 201-204 and 211-214 on that side of the dielectric material 260.
  • the impedance of the feedlines 250 and 252 should approximately match the impedance of a transmission line carrying RF signals from a transmitter and/or to a receiver. For a coaxial transmission line, this impedance is typically around 50 ohms.
  • Dipole element 201 and dipole element 202 on the opposite side of dielectric material 260 form a dipole for a given first wavelength of radiation/reception.
  • dipole element 203 and 204 also form a dipole for the same wavelength of radiation/reception since the dipole formed by dipole elements 203 and 204 has an approximately equivalent length to the dipole formed by dipole elements 201 and 202.
  • a gap 221-224 exists between dipole elements 201-204 and their corresponding dipole elements 211-214.
  • the gaps 221- 224 form an open circuit between dipole elements 201-204 and dipole elements 211- 214.
  • the gaps 221-224 are effectively short circuited so that a longer dipole equal in length, for example, to the combined lengths of dipole elements 201-202, dipole elements 211- 212, and gaps 221 and 223.
  • dipole elements 201-202 and 211-212 form a dipole for a second wavelength of radiation longer than that of the first wavelength dipole. Therefore, the multi-band antenna 200 functions on two bands (i.e., two different wavelengths).
  • the multi-band antenna 200 can also have a cylindrical radome (not shown) placed over the antenna structure for weather proofing.
  • the multi-band antenna 200 is presented as an example of a multi-band antenna and is not meant to imply any architectural limitations.
  • FIG. 3 A depicts side 1 on the multi-band antenna 200.
  • FIG. 3B depicts side 2 of the multi- band antenna 200. Both the views in FIG. 3A and FIG. 3B are from the same side, but represent a different cross-section of the multi-band antenna 200. In between the two cross-sections shown in FIG. 3A and FIG. 3B is a layer of dielectric material 260.
  • the pattern of the microstrips (serial feedlines) 250 and 252, and the dipole elements 201-204 and 211-214, as described above, is etched and/or otherwise formed (for example, by utilizing a reversed mask process) in a dielectric material 260 and an electrically conductive material such as, for example, copper is deposited onto each side of the dielectric material 260 to form the multi-band antenna 200.
  • an electrically conductive material such as, for example, copper is deposited onto each side of the dielectric material 260 to form the multi-band antenna 200.
  • FIG. 4 a side view of the multi-band antenna 200 oriented ninety degrees away from the view depicted in FIG. 2 is shown in accordance with an aspect of an embodiment. In this view, it is apparent that microstrip (serial feedlines) elements 250 and 252 as well as associated dipole elements connected to microstrip (serial feedlines) elements 250 and 252 are separated from each other by dielectric material 260.
  • FIG. 5 a diagram illustrating a multi-band antenna 504 encased in a radome 506 is depicted in accordance with an aspect of an embodiment.
  • the multi-band antenna 504 tranceives multiple frequency bands similar to, for example, multi-band antenna 200 in FIG. 2 and is encased within the radome 506 which has a parasitic element 502 attached to the outside. Without the parasitic element 502, the radiation pattern of the multi-band antenna 504 is elliptical as illustrated in a radiation pattern 604 shown in FIG. 6. However, with the addition of parasitic element 502, the radiation pattern produced by the multi-band antenna 504 becomes substantially circular and omni directional as depicted by radiation pattern 602 in FIG. 6.
  • FIGs. 2-4 are examples of multi-band antennas with dual bands. Dual-band antennas have been shown for simplicity of explanation. However, these antennas are presented and intended only as examples of a multi-band antenna and not as architectural limitations. It is appreciated that the instances presented above can be extended to antennas having three, four, or more operation bands by adding gaps and additional dipole elements of lengths appropriate to add a longer dipole to the existing dipoles corresponding to the additional bands desired. Additional multi-band dipole elements can be added to improve gain. [0019] In order to provide additional context for implementing various aspects of the embodiments, FIG.
  • FIG. 7 a system diagram illustrating a communications network 700 in accordance with an aspect of an embodiment is depicted.
  • the communications network 700 is a plurality of interconnected heterogeneous networks in which instances provided herein can be implemented.
  • communications network 700 contains an Internet Protocol (IP) network 702, a Local Area Network (LAN) / Wide Area Network (WAN) 704, a Public Switched Telephone Network (PSTN) 709, cellular wireless networks 712 and 713, and a satellite communication network 716.
  • IP Internet Protocol
  • LAN Local Area Network
  • WAN Wide Area Network
  • PSTN Public Switched Telephone Network
  • Networks 702, 704, 709, 712, 713 and 716 can include permanent connections, such as wire or fiber optic cables, and/or temporary connections made through telephone connections.
  • Wireless connections are also viable communication means between networks.
  • IP network 702 can be a publicly available IP network (e.g., the
  • IP network 702 typically operates according to the Internet Protocol (IP) and routes packets among its many switches and through its many transmission paths. IP networks are generally expandable, fairly easy to use, and heavily supported. Coupled to IP network 702 is a Domain Name Server (DNS) 708 to which queries can be sent, such queries each requesting an IP address based upon a Uniform Resource Locator (URL). IP network 702 can support 32 bit IP addresses as well as 128 bit IP addresses and the like.
  • DNS Domain Name Server
  • LAN/WAN 704 couples to IP network 702 via a proxy server 706 (or another connection).
  • LAN/WAN 704 can operate according to various communication protocols, such as the Internet Protocol, Asynchronous Transfer Mode (ATM) protocol, or other packet switched protocols.
  • Proxy server 706 serves to route data between IP network 702 and LAN/WAN 704.
  • a firewall that precludes unwanted communications from entering LAN/WAN 704 can also be located at the location of proxy server 706.
  • Computer 720 couples to LAN/WAN 704 and supports communications with LAN/WAN 704.
  • Computer 720 can employ the LAN/WAN 704 and proxy server 706 to communicate with other devices across IP network 702. Such communications are generally known in the art and are described further herein.
  • phone 722 couples to computer 720 and can be employed to initiate IP telephony communications with another phone and/or voice terminal using IP telephony.
  • An IP phone 754 connected to IP network 702 (and/or other phone, e.g., phone 724) can communicate with phone 722 using IP telephony.
  • PSTN 709 is a circuit switched network that is primarily employed for voice communications, such as those enabled by a standard phone 724.
  • PSTN 709 also supports the transmission of data.
  • PSTN 709 can be connected to IP Network 702 via gateway 710.
  • Data transmissions can be supported to a tone based terminal, such as a FAX machine 725, to a tone based modem contained in computer 726, or to another device that couples to PSTN 709 via a digital connection, such as an Integrated Services Digital Network (ISDN) line, an Asynchronous Digital Subscriber Line (ADSL), IEEE 802.16 broadband local loop, and/or another digital connection to a terminal that supports such a connection and the like.
  • ISDN Integrated Services Digital Network
  • ADSL Asynchronous Digital Subscriber Line
  • IEEE 802.16 broadband local loop
  • a voice terminal such as phone 728
  • Computer 726 can support IP telephony with voice terminal 728, for example.
  • Cellular networks 712 and 713 support wireless communications with terminals operating in their service area (which can cover a city, county, state, country, etc.). Each of cellular networks 712 and 713 can operate according to a different operating standard utilizing a different frequency (e.g., 850 and 1900 MHz) as discussed in more detail below.
  • Cellular networks 712 and 713 can include a plurality of towers, e.g., 730, that each provide wireless communications within a respective cell. At least some of the plurality of towers 730 can include a multi-band antenna allowing a single antenna to service both networks' 712 and 713 client devices.
  • Wireless terminals that can operate in conjunction with cellular network 712 or 713 include wireless handsets 732 and 733 and wirelessly enabled laptop computers 734, for example.
  • Wireless handsets 732 and 733 can be, for example, personal digital assistants, wireless or cellular telephones, and/or two-way pagers and operate using different wireless standards.
  • wireless handset 732 can operate via a TDMA/GSM standard and communicate with cellular network 712 while wireless handset 733 can operate via a UMTS standard and communicate with cellular network 713
  • Cellular networks 712 and 713 couple to IP network 702 via gateways 714 and 715 respectively.
  • Wireless handsets 732 and 733 and wirelessly enabled laptop computers 734 can also communicate with cellular network 712 and/or cellular network 713 using a wireless application protocol (WAP).
  • WAP is an open, global specification that allows mobile users with wireless devices, such as, for example, mobile phones, pagers, two-way radios, smart phones, communicators, personal digital assistants, and portable laptop computers and the like, to easily access and interact with information and services almost instantly.
  • WAP is a communications protocol and application environment and can be built on any operating system including, for example, Palm OS, EPOC, Windows CE, FLEXOS, OS/9, and JavaOS. WAP provides interoperability even between different device families.
  • WAP is the wireless equivalent of Hypertext Transfer Protocol (HTTP) and Hypertext Markup Language (HTML).
  • HTTP-like component defines the communication protocol between the handheld device and a server or gateway. This component addresses characteristics that are unique to wireless devices, such as data rate and round-trip response time.
  • HTML-like component commonly known as Wireless Markup Language (WML)
  • WML Wireless Markup Language
  • Each of Cellular network 712 and 713 operates according to an operating standard, which can be different from each other, and which may be, for example, an analog standard (e.g., the Advanced Mobile Phone System (AMPS) standard), a code division standard (e.g., the Code Division Multiple Access (CDMA) standard), a time division standard (e.g., the Time Division Multiple Access (TDMA) standard), a frequency division standard (e.g., the Global System for Mobile Communications (GSM)), or any other appropriate wireless communication method.
  • cellular network 712 supports voice and data communications with terminal units, e.g., 732, 733, and 734.
  • terminal units e.g., 732, 733, and 734.
  • cellular network 712 and 713 have been shown and discussed as completely separate entities. However, in practice, they often share resources.
  • Satellite network 716 includes at least one satellite dish 736 that operates in conjunction with a satellite 738 to provide satellite communications with a plurality of terminals, e.g., laptop computer 742 and satellite handset 740. Satellite handset 740 could also be a two-way pager. Satellite network 716 can be serviced by one or more geosynchronous orbiting satellites, a plurality of medium earth orbit satellites, or a plurality of low earth orbit satellites. Satellite network 716 services voice and data communications and couples to IP network 702 via gateway 718. [0030] FIG. 7 is intended as an example and not as an architectural limitation for instances disclosed herein. For example, communication network 700 can include additional servers, clients, and other devices not shown. Other interconnections are also possible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manufacturing & Machinery (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Details Of Aerials (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transceivers (AREA)

Abstract

L'invention concerne une antenne à bandes multiples pour une utilisation, par exemple, dans un réseau de communication sans fil, qui emploie des dipôles à microbande à résonances multiples qui résonnent à des fréquences multiples à cause “ d'îlots ” de microbande. Des espaces dans les microbandes créent un circuit RF ouvert sauf pour les fréquences souhaitées. À une fréquence souhaitée, l'énergie RF perçoit un espace comme étant un court-circuit entre un îlot et le reste d'une antenne dipôle, résonnant ainsi à la fréquence souhaitée. Dans un exemple, l'antenne à bandes multiples comprend des premier, second, troisième et quatrième éléments dipolaires. Des espaces entre les premier et troisième éléments dipolaires et les second et quatrième éléments dipolaires sont suffisamment petits pour que les premier, second, troisième et quatrième éléments dipolaires forment un second dipôle ayant une longueur d'onde de dipôle correspondante plus longue que celle du premier dipôle.
EP07840256A 2006-06-16 2007-06-16 Antenne dipôle à microbande à résonances multiples Withdrawn EP2030285A4 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/424,664 US7277062B1 (en) 2006-06-16 2006-06-16 Multi-resonant microstrip dipole antenna
US11/424,639 US7630696B2 (en) 2006-06-16 2006-06-16 Multi-band RF combiner
US11/424,614 US7764245B2 (en) 2006-06-16 2006-06-16 Multi-band antenna
PCT/US2007/071415 WO2008024551A2 (fr) 2006-06-16 2007-06-16 Antenne dipôle à microbande à résonances multiples

Publications (2)

Publication Number Publication Date
EP2030285A2 true EP2030285A2 (fr) 2009-03-04
EP2030285A4 EP2030285A4 (fr) 2009-06-03

Family

ID=38832929

Family Applications (3)

Application Number Title Priority Date Filing Date
EP07798675A Withdrawn EP2030284A4 (fr) 2006-06-16 2007-06-16 Antenne multi-bandes
EP07840256A Withdrawn EP2030285A4 (fr) 2006-06-16 2007-06-16 Antenne dipôle à microbande à résonances multiples
EP07845210A Withdrawn EP2030377A4 (fr) 2006-06-16 2007-06-16 Combineur rf à bandes multiples

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP07798675A Withdrawn EP2030284A4 (fr) 2006-06-16 2007-06-16 Antenne multi-bandes

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP07845210A Withdrawn EP2030377A4 (fr) 2006-06-16 2007-06-16 Combineur rf à bandes multiples

Country Status (3)

Country Link
EP (3) EP2030284A4 (fr)
CA (3) CA2648259A1 (fr)
WO (3) WO2007149794A2 (fr)

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JP4083462B2 (ja) * 2002-04-26 2008-04-30 原田工業株式会社 マルチバンドアンテナ装置
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JP3752230B2 (ja) * 2003-02-14 2006-03-08 Ｔｄｋ株式会社 フロントエンドモジュール
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Also Published As

Publication number Publication date
WO2007149794A3 (fr) 2009-01-15
CA2648255A1 (fr) 2007-12-21
EP2030285A4 (fr) 2009-06-03
WO2007147153A2 (fr) 2007-12-21
EP2030284A2 (fr) 2009-03-04
CA2648256A1 (fr) 2008-02-28
EP2030284A4 (fr) 2009-06-10
EP2030377A4 (fr) 2009-11-18
CA2648259A1 (fr) 2007-12-27
WO2007149794A2 (fr) 2007-12-27
WO2008024551A3 (fr) 2008-12-11
EP2030377A2 (fr) 2009-03-04
WO2008024551A2 (fr) 2008-02-28
WO2007147153A3 (fr) 2008-03-06

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