EP4266489B1 - Directeur à double couche et réseau d'antennes à station de base multifréquence - Google Patents

Directeur à double couche et réseau d'antennes à station de base multifréquence Download PDF

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Publication number
EP4266489B1
EP4266489B1 EP22893991.4A EP22893991A EP4266489B1 EP 4266489 B1 EP4266489 B1 EP 4266489B1 EP 22893991 A EP22893991 A EP 22893991A EP 4266489 B1 EP4266489 B1 EP 4266489B1
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EP
European Patent Office
Prior art keywords
director
frequency
double
layered
array
Prior art date
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Active
Application number
EP22893991.4A
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German (de)
English (en)
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EP4266489A1 (fr
EP4266489A4 (fr
Inventor
Shao ZHANG
Biqun WU
Zehai WU
Peng Zhang
Benbo LUO
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.)
Guangdong Broadradio Communication Technology Co Ltd
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Guangdong Broadradio Communication Technology Co Ltd
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Publication of EP4266489A1 publication Critical patent/EP4266489A1/fr
Publication of EP4266489A4 publication Critical patent/EP4266489A4/fr
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    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • H01Q5/42—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays
    • 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
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/108—Combination of a dipole with a plane reflecting surface
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H01Q21/26—Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre

Definitions

  • the present application relates to the technical field of base station antennas, in particular to a double-layered director and a multi-frequency base station antenna array using the same.
  • the multi-port broadband base station antenna can form more antenna arrays without increasing the antenna width, which will reduce the distance between the antenna arrays and increase the mutual influence between the antenna arrays. In this case, it is required to have a consistent and stable radiation pattern within the operating frequency band.
  • a good choice is to add a director above the radiating unit. Use of the parasitic effect between the director and the radiating unit can make the antenna radiation wave radiate in the normal radiation direction, thereby realizing the reduction of the antenna width by increasing the height of the array.
  • the number of directors is increased or the size there of is large, resonance will occur during operation of the antenna, hence affecting the performance of the antenna itself.
  • Patent (application) references like CN110994190A , CN113594705A , US 2009/146907A1 , and EP1120856B1 and US2009/267856A1 disclose similar technical features therein.
  • the object of the present invention is to at least solve one of the drawbacks in the prior art proposed in the background technology, and to realize the object of the present invention, the following technical solution is proposed:
  • the present invention proposes a double-layered director which is configured to be arranged directly above a corresponding high-frequency radiation unit, the double-layered director includes a first director (1) and a second director (2) installed above the first director (1), the second director (2) includes a dielectric substrate (22) and a split copper foil (21) installed on the dielectric substrate (22); the split copper foil (21) includes a plurality of small copper foils (211), and the plurality of small copper foils (211) are circumferentially arranged at intervals around a center of the second director (2); the small copper foils (211) are of an annular sectoral shape; the double-layered director is configured to weaken the influence of the resonant current of the director on the high-frequency radiation unit due to arrangement of the split copper on the electric substrate; and the first director (1) is made of a whole piece of a metal sheet.
  • the number of the small copper foils is at least 4.
  • the number of the small copper foils is at least 12.
  • the length of the small copper foils is less than 0.25 ⁇ , where ⁇ is the wavelength of the center frequency of the high-frequency radiation unit.
  • the shape of the metal sheet is circular or polygonal.
  • a second aspect of the present invention proposes a multi-frequency base station antenna array. It includes a reflector and a high-frequency array and a low-frequency array arranged on the reflector, the high-frequency array includes several high-frequency radiation units (3), and the low-frequency array includes several low-frequency radiation units (4), each high-frequency radiation unit is distributed below a corresponding low-frequency radiation unit, wherein a double-layered director as mentioned above is also arranged directly above a corresponding high-frequency radiation unit.
  • the high-frequency array and the low-frequency array are a two-row array each.
  • the present invention brings the following good effects.
  • the present invention arranges a split copper foil on the dielectric substrate. This not only weakens the influence of the resonant current of the director on the high-frequency radiation unit itself, but also simplifies the boundary of the radiation unit, and reduces the coupling and mutual interference between the high-frequency and low-frequency radiation units, and avoids the superposition of scattered waves which otherwise will cause the pattern distortion. This in turn enables the multi-frequency base station antenna to have consistent and stable horizontal half-power beamwidth and gain within the operating frequency band.
  • a first aspect of the embodiment of the present invention proposes a double-layered director, which is mainly applied to a multi-frequency base station antenna array.
  • the double-layered director includes a first director 1 and a second director 2, and the second director 2 is installed directly above the first director 1.
  • the first director 1 and the second director 2 may be connected and fixed through an insulating support post.
  • the first director 1 is constructed of a whole piece of circular metal sheet, and its diameter is between 0.15 ⁇ -0.5 ⁇ , where ⁇ is the wavelength of the center frequency of the antenna.
  • the metal sheet can also be a square or polygonal metal sheet. It is not limited to a circular shape, and those skilled in the art can set it according to actual need.
  • the second director 2 is a split director, which is made of a PCB.
  • the second director 2 includes a dielectric substrate 22 and a split copper foil 21 installed on the dielectric substrate 22.
  • the dielectric substrate 22 plays a role of supporting the split copper foil 21.
  • the split copper foil 21 includes a plurality of small copper foils 211, each of which is a lobe, and the plurality of small copper foils 211 are arranged circumferentially around a center of the second director 2 at intervals.
  • the number of the small copper foils 211 is at least 4, for example, it may be 4, 5, 6 and so on.
  • FIG. 2 it is a schematic top view of four small copper foils in a double-layered director of the present invention.
  • the shape of the small copper foil 211 may be a sectoral shape or annular sector.
  • the split copper foil 21 is formed by 12 sectoral small copper foils 211 circumferentially arranged around the center of the second director 2 at intervals.
  • the small copper foil 211 may also be other polygons, such as an annular sector.
  • the split copper foil 21 is constructed of 12 small copper foils 211 of sectoral shape arranged circumferentially around the center of the second director 2 at intervals.
  • the split copper foil 21 may also be formed by circumferentially arranging 4 small copper foils 211 of a sectoral shape around the center of the second director 2 at intervals.
  • the radius of each small sectoral copper foil 211 is smaller than 0.25 ⁇ , where ⁇ is the wavelength of the center frequency of the antenna.
  • a second aspect of this embodiment proposes a multi-frequency base station antenna array.
  • the multi-frequency base station antenna array includes a reflector and a high-frequency array and a low-frequency array arranged on the reflector.
  • the high-frequency array includes several high-frequency radiation units 3, and the low-frequency array includes several low-frequency radiation units 4.
  • two rows of the high-frequency arrays and low-frequency arrays are provided, and a corresponding high-frequency radiation unit 3 is distributed below a corresponding low-frequency radiation unit 4.
  • the multi-frequency base station antenna array also includes a double-layered director described in the above embodiments, and the double-layered director is arranged directly above a corresponding high-frequency radiation unit 3.
  • FIG. 5 shows comparison width change curves of the horizontal plane half-power beamwidth of the array antenna that adds two layers of prior art metal directors of the same size and the double-layered director of the present invention. It can be seen from FIG. 5 that after adding the split director of the present invention, the half-power beamwidth in the working frequency band of the antenna is more convergent, and the more the number of lobes, the more convergent the half-power beamwidth in the working frequency band.
  • the present invention produces multiple effects simultaneously by disposing the split copper foils 211 on the dielectric substrate 22. This not only weakens the influence of the resonant current of the director on the high-frequency radiation unit 3 itself, but also simplifies the boundary of the radiation unit, and reduces the coupling and mutual interference between the high-frequency and low-frequency radiation units, and avoids the superposition of scattered waves which otherwise will cause the pattern distortion. This in turn enables the multi-frequency base station antenna to have consistent and stable horizontal half-power lobe width and gain within the operating frequency band.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Aerials With Secondary Devices (AREA)

Claims (7)

  1. Directeur en double couche, configuré pour être disposé directement au-dessus d'une unité de rayonnement haute fréquence correspondante, et comprenant un premier directeur (1) et un deuxième directeur (2) installé au-dessus dudit premier directeur (1),
    dans lesquels ledit deuxième directeur (2) comprend un substrat diélectrique (22) et une feuille de cuivre divisée (21) installée sur ledit substrat diélectrique (22) ;
    ladite feuille de cuivre divisée (21) comprend une pluralité de petites feuilles de cuivre (211), et ladite pluralité de petites feuilles de cuivre (211) sont disposées circonférentiellement par intervalles autour d'un centre dudit deuxième directeur (2) ;
    les petites feuilles de cuivre (211) sont de forme sectorielle annulaire ;
    caractérisé en ce que le directeur en double couche est configuré pour affaiblir l'influence du courant de résonance du directeur sur ladite unité de rayonnement haute fréquence en raison que le cuivre divisé est disposé sur ledit substrat diélectrique (22) ; et ledit premier directeur (1) est en une pièce entière d'une feuille de métal.
  2. Directeur en double couche selon la revendication 1, caractérisé en ce que le nombre des petites feuilles de cuivre (211) est d'au moins 4.
  3. Directeur en double couche selon la revendication 1, caractérisé en ce que le nombre des petites feuilles de cuivre (211) est d'au moins 12.
  4. Directeur en double couche selon la revendication 1, caractérisé en ce que la longueur des petites feuilles de cuivre (211) est inférieure à 0.25 λ, où λ est la longueur d'onde de la fréquence centrale de ladite unité de rayonnement haute fréquence.
  5. Directeur en double couche selon la revendication 1, caractérisé en ce que la feuille de métal est de forme circulaire ou polygonale.
  6. Matrice d'antennes de station de base multifréquences, comprenant un réflecteur, et une matrice haute fréquence et une matrice basse fréquence disposées sur ledit réflecteur, dans lesquelles ladite matrice haute fréquence comprend plusieurs unités de rayonnement haute fréquence (3), et ladite matrice basse fréquence comprend plusieurs unités de rayonnement basse fréquence (4), chaque unité de rayonnement haute fréquence est distribuée au-dessous d'une unité de rayonnement basse fréquence correspondante, caractérisée en ce que un directeur en double couche selon l'une quelconque des revendications 1 à 5 est également disposé directement au-dessus d'une unité de rayonnement haute fréquence correspondante.
  7. Matrice d'antennes de station de base multifréquences selon la revendication 6, caractérisée en ce que ladite matrice haute fréquence et ladite matrice basse fréquence sont chacun une matrice à deux rangées.
EP22893991.4A 2021-12-09 2022-04-14 Directeur à double couche et réseau d'antennes à station de base multifréquence Active EP4266489B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111502288.9A CN114171889B (zh) 2021-12-09 2021-12-09 一种双层引向器及多频基站天线阵列
PCT/CN2022/086852 WO2023103244A1 (fr) 2021-12-09 2022-04-14 Directeur à double couche et réseau d'antennes à station de base multifréquence

Publications (3)

Publication Number Publication Date
EP4266489A1 EP4266489A1 (fr) 2023-10-25
EP4266489A4 EP4266489A4 (fr) 2024-01-10
EP4266489B1 true EP4266489B1 (fr) 2024-11-06

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EP (1) EP4266489B1 (fr)
CN (1) CN114171889B (fr)
WO (1) WO2023103244A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114171889B (zh) * 2021-12-09 2022-07-05 广东博纬通信科技有限公司 一种双层引向器及多频基站天线阵列
CN120184566A (zh) 2023-12-19 2025-06-20 锐捷网络股份有限公司 一种增益天线及通信设备
CN119171052A (zh) * 2024-09-02 2024-12-20 中国人民解放军国防科技大学 一种边缘加载的紧耦合宽带对跖Vivaldi天线阵列

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Publication number Publication date
EP4266489A1 (fr) 2023-10-25
EP4266489A4 (fr) 2024-01-10
CN114171889A (zh) 2022-03-11
CN114171889B (zh) 2022-07-05
WO2023103244A1 (fr) 2023-06-15

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