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Multi-band array antenna

An array antenna and multi-band technology, applied in the field of communication, can solve the problems that it is difficult to meet the application requirements of 700MHz LTE, it is difficult to expand the 700MHz frequency band, and the dual-band antenna has a large windward area, so as to reduce operation and maintenance costs, reduce the number of antennas, and have a compact structure Effect

Active Publication Date: 2014-02-05
GUANGDONG BROADRADIO COMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in order to weaken the coupling between high and low frequency radiating elements, the distance between them should not be too small, resulting in a large windward area of ​​the dual-frequency antenna
[0005] In addition, most of the antennas in the prior art work in the 790-960MHz and 1710-2690MHz frequency bands, it is difficult to extend to the 700MHz frequency band, and it is difficult to meet the application requirements of 700MHz LTE

Method used

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Embodiment 1

[0035] Such as Figure 2 to Figure 4 As shown, a compact dual-band array antenna provided by an embodiment of the present invention includes a metal reflector, and a low-frequency radiation unit 1 working in a lower frequency band and a high-frequency radiation unit 1 working in a higher frequency band installed on the metal reflector. Frequency Radiation Unit 2. Preferably, the low-frequency radiation unit 1 works in the frequency range of 698-960 MHz, and the high-frequency radiation unit 2 works in the frequency range of 1710-2690 MHz.

[0036] The low-frequency radiating unit 1 includes horizontal oscillators 101 and vertical oscillators 102 that are orthogonal to each other. The horizontal oscillators 101 and vertical oscillators 102 are connected to a power divider feeding network to generate a ±45-degree polarized far-field radiation pattern. Wherein, there are two vertical vibrators 102, which are symmetrically installed on the left and right sides of the horizontal v...

Embodiment 2

[0049] Such as Figure 5 As shown, the embodiment of the present invention is changed on the basis of the first embodiment, and a 3-band array antenna is provided. Specifically, the plurality of high-frequency radiation units 2 in a whole column of high-frequency arrays in the embodiment of the present invention are respectively subordinate to two mutually independent high-frequency systems. In other words, there are two independent high-frequency systems in the embodiment of the present invention, which are Figure 5 In the part selected by the two rectangular frames, the two high-frequency systems can work in different frequency bands, or in the same frequency band, and jointly cover the 1710-2690MHz frequency band; plus another coaxial low-frequency system, covering 698 ~960MHz frequency band; constitutes a 3-band array antenna in which one low-frequency system and two high-frequency systems coexist.

[0050] Other features in this embodiment of the present invention are ...

Embodiment 3

[0052] Such as Image 6 As shown, the embodiment of the present invention provides a 4-band array antenna, including two low-frequency arrays and two high-frequency arrays. The two low-frequency arrays are formed by arranging a plurality of low-frequency radiation units 1 along two mutually parallel axes; each low-frequency array is also arranged on the axis of a high-frequency array. Among them, each column of high-frequency arrays belongs to an independent high-frequency system, respectively as follows Image 6 In the part selected by the two rectangular frames, the two high-frequency systems can work in different frequency bands, or in the same frequency band, and jointly cover the 1710-2690MHz frequency band; each column of low-frequency arrays also belongs to an independent low-frequency system , the two low-frequency systems can work in different frequency bands or in the same frequency band, and jointly cover the 698-960MHz frequency band; forming a 4-band array antenn...

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Abstract

The invention relates to a multi-band array antenna. The multi-band array antenna comprises a metal reflecting plate, low-frequency radiating elements and high-frequency radiating elements, wherein the low-frequency radiating elements and the high-frequency radiating elements are all installed on the metal reflecting plate, the low-frequency radiating elements operate at a low frequency band, and the high-frequency radiating elements operate at a high frequency band; the low-frequency radiating elements and the high-frequency radiating elements are arranged on the metal reflecting plate in a nested mode, and the orthographic projection of the low-frequency radiating elements does not coincide with that of the high-frequency radiating elements. Each low-frequency radiating element is composed of a horizontal oscillator and a pair of vertical oscillators connected with a power divider feed network. The low-frequency radiating elements are flexible in structure, and the distance and other parameters can be flexibly configured according to actual use requirements. By the adoption of the structure of the multi-band array antenna, circuits and networks are low in loss so that the radiation characteristic of the multi-band array antenna can be kept stable within the range of an ultra-wide band; besides, the multi-band array antenna is compatible with various service patterns including 2G, 3G and 4G LTE, as a result, the number of antennae used in a base station can be decreased, station distribution cost is reduced, and operation and maintenance cost also can be reduced.

Description

technical field [0001] The invention relates to the communication field, in particular to a multi-band array antenna. Background technique [0002] Today, 2G, 3G and the upcoming 4G LTE network coexist, and multiple systems using different frequency bands exist at the same time, requiring the use of base station antennas that can work in different frequency bands. Using ordinary narrow-band antennas, a base station needs to arrange many sub-antennas, which increases system complexity and property costs. In order to reduce the cost of network construction, broadband and miniaturization of antennas have become one of the current hot spots. [0003] In order to be compatible with multiple communication systems, dual-frequency dual-polarized antennas have been used on a large scale. Traditional dual-band antennas often adopt a structure in which high-frequency radiation units and low-frequency radiation units are side by side (Side by Side). The Australian patent application w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q21/00H01Q21/30H01Q21/24H01Q19/10H01Q1/36
Inventor 吴壁群
Owner GUANGDONG BROADRADIO COMM TECH
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