CN111029715A - Multi-frequency array antenna - Google Patents

Multi-frequency array antenna Download PDF

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Publication number
CN111029715A
CN111029715A CN201911312234.9A CN201911312234A CN111029715A CN 111029715 A CN111029715 A CN 111029715A CN 201911312234 A CN201911312234 A CN 201911312234A CN 111029715 A CN111029715 A CN 111029715A
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CN
China
Prior art keywords
frequency
antenna
tdd
array
antenna array
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Pending
Application number
CN201911312234.9A
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Chinese (zh)
Inventor
陆国标
贾飞飞
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Comba Telecom Technology Guangzhou Ltd
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Comba Telecom Technology Guangzhou Ltd
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Publication date
Application filed by Comba Telecom Technology Guangzhou Ltd filed Critical Comba Telecom Technology Guangzhou Ltd
Priority to CN201911312234.9A priority Critical patent/CN111029715A/en
Publication of CN111029715A publication Critical patent/CN111029715A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—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
    • H01Q1/12—Supports; Mounting means
    • 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
    • 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
    • H01Q1/523—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between antennas of an array
    • 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
    • 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
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system

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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention provides a multi-frequency array antenna which comprises a reflecting plate, an FDD antenna array and a TDD antenna array, wherein the FDD antenna array and the TDD antenna array are arranged on the reflecting plate along the length direction of the reflecting plate, the FDD antenna array comprises a plurality of low-frequency oscillators and high-frequency oscillators, the TDD antenna array comprises a plurality of TDD oscillators, radiation arms of the low-frequency oscillators are in a cross shape and are arranged along the direction forming an included angle of +/-45 degrees with the length direction of the reflecting plate, and the projection of the low-frequency oscillators on the reflecting plate is not overlapped with the projection of the high-frequency oscillators and the projection of the TDD oscillators on the reflecting plate. In the multi-frequency array antenna provided by the invention, the low-frequency oscillator in the FDD antenna array is a cross-shaped oscillator with a small structure, so that the low-frequency oscillator, the high-frequency oscillator and the TDD oscillator in the TDD antenna array are not overlapped in projection on the reflecting plate, the coupling influence among the oscillators is reduced, the interference among various frequency bands is reduced, and the radiation index and the circuit index of the antenna are improved.

Description

Multi-frequency array antenna
Technical Field
The invention relates to the technical field of mobile communication, in particular to a multi-frequency array antenna.
Background
With the rapid development of the technology in the field of mobile communication and the gradual progress of 5G network construction, the requirement of a communication base station on the performance index of an antenna is higher and higher. Under the current large environment that 2G, 3G, 4G and 5G networks are needed to coexist, along with the current situation that the site selection of a base station is difficult, a multi-frequency array antenna provided with an FDD antenna array and a TDD antenna array is the first choice of the base station antenna.
However, in the conventional multi-frequency array antenna, in order to achieve miniaturization, a high-frequency oscillator is generally coaxially arranged on a low-frequency oscillator in an FDD antenna array, and the layout of the coaxial manner not only causes a severe mutual coupling phenomenon between the high-frequency oscillator and the low-frequency oscillator and significantly deteriorates electrical performance, but also easily affects radiation indexes and circuit indexes of TDD oscillators in the TDD antenna array due to a large radiation arm of the low-frequency oscillator, resulting in poor antenna performance.
Disclosure of Invention
The invention aims to provide a multi-frequency array antenna which can realize coexistence of multiple networks and has good electrical performance.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a multifrequency array antenna, includes the reflecting plate, all follows the length direction of reflecting plate is located FDD antenna array and TDD antenna array on the reflecting plate, FDD antenna array includes a plurality of low frequency oscillators and high frequency oscillator, TDD antenna array includes a plurality of TDD oscillators, the radiating arm of low frequency oscillator be "ten" font and follow with the length direction of reflecting plate becomes the direction setting of 45 degrees contained angles, just the low frequency oscillator in projection on the reflecting plate with high frequency oscillator, TDD oscillator in projection on the reflecting plate is all not overlapped.
Preferably, two high-frequency oscillators are arranged between two adjacent low-frequency oscillators in the same FDD antenna array at intervals.
Preferably, the distance between two adjacent high-frequency elements in the same FDD antenna array is half of the distance between two adjacent low-frequency elements.
Preferably, the distance between two adjacent low-frequency oscillators in the same FDD antenna array is 0.7-1 times of the central frequency wavelength of the low-frequency oscillators.
Preferably, the distance between two adjacent TDD oscillators in the same TDD antenna array is 0.7-1 times of the central frequency wavelength of the TDD oscillators.
Preferably, the distance between two adjacent rows of TDD antenna arrays is 0.5-0.6 times of the central frequency wavelength of the TDD oscillator.
Preferably, the FDD antenna array is provided with two rows which are respectively arranged at two ends of the width direction of the reflector plate, and the TDD antenna array is provided with a plurality of rows which are arranged between the two rows of FDD antenna arrays side by side.
Preferably, the reflecting plate includes a first installation portion for setting the FDD antenna array and a second installation portion for setting the TDD antenna array, and the first installation portion and the second installation portion are different in height.
More preferably, the second mounting portion is 10-20mm higher than the first mounting portion.
More preferably, the reflection plate is integrally formed by bending the first and second mounting portions.
Compared with the prior art, the scheme of the invention has the following advantages:
1. in the multi-frequency array antenna provided by the invention, the low-frequency oscillator in the FDD antenna array is a cross-shaped oscillator with a small structure, so that the low-frequency oscillator, the high-frequency oscillator and the TDD oscillator in the TDD antenna array are not overlapped in projection on the reflecting plate, the coupling influence among the oscillators is reduced, the interference among various frequency bands is reduced, and the radiation index and the circuit index of the antenna are improved.
2. In the multi-frequency array antenna provided by the invention, because the low-frequency oscillators are cross-shaped oscillators occupying less space, two high-frequency oscillators can be arranged between two adjacent low-frequency oscillators in the same FDD antenna array at intervals, enough high-frequency oscillators can be arranged without coaxially arranging the high-frequency oscillators on the low-frequency oscillators, and the radiation performance can meet the requirement.
3. In the multi-frequency array antenna provided by the invention, two rows of FDD antenna arrays are respectively arranged at two ends of the width direction of the reflector plate, and the TDD antenna array is arranged between the two rows of FDD antenna arrays, so that the layout can ensure that the boundary environment of a TDD system has consistency, is beneficial to shaping antenna beams and debugging electrical performance, can effectively improve the isolation of the system, is arranged into a more compact structure, and realizes the miniaturization of the antenna.
4. In the multi-frequency array antenna provided by the invention, the first installation part and the second installation part on the reflecting plate have height difference, namely the installation heights of the FDD antenna array and the TDD antenna array are different, so that the coupling influence between the FDD antenna array and the TDD antenna array is reduced, and the isolation between systems is further improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a multi-frequency array antenna according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
It will be understood by those within the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.
As shown in fig. 1, an embodiment of the present invention provides a multi-frequency array antenna 1000, which has a compact structure and good electrical performance, and can implement multi-network coexistence of 2G, 3G, 4G, and 5G networks.
Multifrequency array antenna 1000 includes reflecting plate 1, two and be listed as FDD antenna array 2 and four and be listed as TDD antenna array 3, two are listed as FDD antenna array 2 and four are listed as TDD antenna array 3 and all follow the length direction of reflecting plate 1 is located on the reflecting plate 1, FDD antenna array 2 includes a plurality of low frequency oscillator 21 and high frequency oscillator 22, TDD antenna array 3 includes a plurality of TDD oscillators 31.
Specifically, the frequency band of the low-frequency oscillator 21 is 690-960MHz, the frequency band of the high-frequency oscillator 22 is 1427-2690MHz, and the frequency band of the TDD oscillator 31 is 3300-3800MHz, so as to support multiple network systems.
Preferably, the radiating arm 211 of the low frequency oscillator 21 is "ten" font, just the radiating arm 211 along with the direction that the length direction of reflecting plate 1 becomes 45 degrees contained angles sets up, with the low frequency oscillator 21 is relative more are reserved to the both sides of the length direction of reflecting plate 1 the installation space of high frequency oscillator 22, high frequency oscillator 22 with the low frequency oscillator 21 sets up side by side, just high frequency oscillator 22, low frequency oscillator 21 and TDD oscillator 31 are in the projection on reflecting plate 1 does not overlap, in order to reduce the coupling influence between the oscillator. Because low frequency oscillator 21 is the less "ten" font oscillator of occupation space, can guarantee not overlapping between each oscillator, and because low frequency oscillator 21 with high frequency oscillator 22 all directly mounted in on the reflecting plate 1, the two is located same level, can realize FDD antenna system's circuit index and radiation index better, promotes can realize the miniaturization when FDD antenna array 2's electrical property.
Preferably, two high-frequency elements 22 are disposed between two adjacent low-frequency elements 21 in the same FDD antenna array 2.
In the prior art, a high-frequency oscillator is coaxially arranged on a low-frequency oscillator, and only one high-frequency oscillator is usually arranged between two adjacent low-frequency oscillators. In this embodiment, since the low-frequency oscillators 21 have a small structure and the radiation arms 211 thereof are arranged in a crossed manner to occupy a small space, two high-frequency oscillators 22 can be arranged between two adjacent low-frequency oscillators 21, and the total number of the high-frequency oscillators 22 is not reduced under the condition that the high-frequency oscillators 22 coaxially arranged with the low-frequency oscillators 21 are removed, thereby ensuring that the radiation performance meets the requirements.
Preferably, two rows of the FDD antenna arrays 2 are respectively disposed at two ends of the reflector 1 in the width direction, and four rows of the TDD antenna arrays 3 are disposed between the two rows of the FDD antenna arrays 2 side by side. The layout can ensure that the boundary environment of the TDD system has consistency, is beneficial to antenna beam forming and electrical performance debugging, can effectively improve the isolation of the system, is set into a more compact structure, and further realizes the miniaturization of the antenna. Secondly, because the radiating arm 211 of the low-frequency oscillator 21 is in a cross shape, the antenna can be far away from the TDD antenna array 3 as far as possible, the coupling influence on the adjacent TDD antenna arrays 3 is reduced, the radiating environments of the four rows of the TDD antenna arrays 3 are basically the same, and the consistency of beam forming and circuit index debugging is facilitated.
Preferably, two adjacent rows of TDD antenna arrays 3 are disposed along the length direction of the reflection plate 1 in a staggered manner, that is, the corresponding TDD oscillators 31 in the two adjacent rows of TDD antenna arrays 3 are disposed in a staggered manner, and the distance between the TDD oscillators 31 in the two adjacent rows of TDD antenna arrays 3 is effectively increased in the limited installation space of the reflection plate 1, so that the coupling effect is reduced, and the isolation is improved.
Reflecting plate 1 includes first installation department 11 and second installation department 12, FDD antenna array 2 locates on the first installation department 11, TDD antenna array 3 locates on the second installation department 12, just first installation department 11 and second installation department 12 have the difference in height, thereby further reduce coupling between FDD antenna array 2 and the TDD antenna array 3 influences, promotes the isolation between the system, and then can further reduce under the condition that satisfies electrical performance interval between FDD antenna array 2 and the TDD antenna array 3 realizes the miniaturization.
Preferably, the second mounting portion 12 is 10-20mm higher than the first mounting portion 11, which is advantageous for achieving electrical indexes and ensuring high strength of the reflection plate 1.
The reflecting plate 1 is integrally formed, and is bent to form a structure with a cross section shaped like a Chinese character 'ji', and specifically comprises the first mounting part 11, the second mounting part 12, and a connecting part (not shown, the same applies below) for connecting the first mounting part 11 and the second mounting part 12. The reflecting plate 1 is of an integrally formed structure, so that the reflecting plate is more convenient to produce, high in structural strength and strong in bearing capacity.
Preferably, the reflection plate 1 further includes a plurality of partition plates (not shown, the same applies below), and the plurality of partition plates are respectively erected between every two adjacent antenna arrays in the two rows of FDD antenna arrays 2 and the four rows of TDD antenna arrays 3, so that the coupling effect between the two adjacent antenna arrays can be reduced by the partition plates, and the radiation performance can be improved.
Preferably, the multi-frequency array antenna 1000 further includes a plurality of isolating bars (not shown, the same below), the isolating bars may be separately disposed between the adjacent low-frequency oscillators 21 and the high-frequency oscillators 22, between the adjacent two high-frequency oscillators 22, and/or between the adjacent two TDD oscillators 31, and the isolating degree between the adjacent two oscillators can be further improved by the isolating bars. The specific number of the isolation strips can be adjusted according to the parameter requirements of the multi-frequency array antenna 1000, namely, the isolation strips are not required to be arranged between every two oscillators.
Further, the distance between two adjacent low-frequency oscillators 21 in the same FDD antenna array 2 is 0.7-1 times of the central frequency wavelength of the low-frequency oscillators 21, the distance between two adjacent high-frequency oscillators 22 in the same FDD antenna array 2 is one half of the distance between two adjacent low-frequency oscillators 21, the distance between two adjacent TDD oscillators 31 in the same TDD antenna array 3 is 0.7-1 times of the central frequency wavelength of the TDD oscillators 31, and the distance between two adjacent rows of TDD antenna arrays 3 is 0.5-0.6 times of the central frequency wavelength of the TDD oscillators 31.
It should be understood that, in the present embodiment, the structure of the multi-frequency array antenna 1000 is described by taking two rows of FDD antenna arrays 2 and four rows of TDD antenna arrays 3 as examples, but the structure of the multi-frequency array antenna 1000 is not limited thereto. In other embodiments, the specific number of FDD antenna arrays 2 and TDD antenna arrays 3 may be adjusted according to actual parameter requirements. Similarly, the specific number of the low-frequency oscillators 21, the high-frequency oscillators 22 and the TDD oscillator 31 can be adjusted according to the actual parameter requirement. Secondly, in this embodiment, since the TDD oscillator 31 does not need to be fully distributed with the second mounting portion 12 to meet the parameter requirement, the TDD antenna array 3 can be distributed at the lower end of the reflection plate 1 to connect to the feeding interface.
The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a multifrequency array antenna, includes the reflecting plate, all follows the length direction of reflecting plate is located FDD antenna array and TDD antenna array on the reflecting plate, FDD antenna array includes a plurality of low frequency oscillators and high frequency oscillator, TDD antenna array includes a plurality of TDD oscillators, its characterized in that, the radiating arm of low frequency oscillator be "ten" font and follow with the length direction of reflecting plate becomes the direction setting of 45 degrees contained angles, just the low frequency oscillator in projection on the reflecting plate with high frequency oscillator, TDD oscillator in projection on the reflecting plate is all not overlapped.
2. The multi-frequency array antenna of claim 1, wherein two high-frequency elements are spaced between two adjacent low-frequency elements in the same FDD antenna array.
3. The multi-frequency array antenna of claim 2, wherein the distance between two adjacent high-frequency elements in the same FDD antenna array is half of the distance between two adjacent low-frequency elements.
4. The multi-frequency array antenna of claim 1, wherein the distance between two adjacent low-frequency elements in the same FDD antenna array is 0.7-1 times the wavelength of the center frequency of the low-frequency elements.
5. The multi-frequency array antenna of claim 1, wherein the distance between two adjacent TDD elements in the same TDD antenna array is 0.7-1 times the central frequency wavelength of the TDD elements.
6. The multi-frequency array antenna of claim 1, wherein the distance between two adjacent rows of TDD antenna arrays is 0.5-0.6 times the central frequency wavelength of the TDD element.
7. The multi-band array antenna of claim 1, wherein the FDD antenna array has two rows, which are respectively disposed at two ends of the width direction of the reflector plate, and the TDD antenna array has multiple rows, which are disposed side by side between the two rows of FDD antenna arrays.
8. The multi-frequency array antenna of claim 1, wherein the reflector plate comprises a first mounting portion for mounting the FDD antenna array and a second mounting portion for mounting the TDD antenna array, the first mounting portion and the second mounting portion having different heights.
9. The multi-frequency array antenna of claim 8, wherein the second mounting portion is 10-20mm higher than the first mounting portion.
10. The multi-frequency array antenna of claim 8 or 9, wherein the reflector plate is integrally formed by bending to form the first and second mounting portions.
CN201911312234.9A 2019-12-18 2019-12-18 Multi-frequency array antenna Pending CN111029715A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911312234.9A CN111029715A (en) 2019-12-18 2019-12-18 Multi-frequency array antenna

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911312234.9A CN111029715A (en) 2019-12-18 2019-12-18 Multi-frequency array antenna

Publications (1)

Publication Number Publication Date
CN111029715A true CN111029715A (en) 2020-04-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911312234.9A Pending CN111029715A (en) 2019-12-18 2019-12-18 Multi-frequency array antenna

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022228188A1 (en) * 2021-04-30 2022-11-03 华为技术有限公司 Antenna array, antenna module, and electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022228188A1 (en) * 2021-04-30 2022-11-03 华为技术有限公司 Antenna array, antenna module, and electronic device

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