Phased-array antenna capable of realizing left-handed and right-handed circular polarization switching

A phased array antenna and circular polarization technology, which is applied in the direction of separately energized antenna array, antenna, antenna array, etc., can solve the problems of increasing the height of the antenna section, increasing the cost of the antenna, increasing the loss, etc., and achieving the polarization switching time Effect of short, small size, and avoidance of parasitic effects

Active Publication Date: 2020-03-24
CHENGDU RDW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the variable polarization scheme, the former will increase the loss, and some parasitic effects introduced by the

Method used

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  • Phased-array antenna capable of realizing left-handed and right-handed circular polarization switching
  • Phased-array antenna capable of realizing left-handed and right-handed circular polarization switching
  • Phased-array antenna capable of realizing left-handed and right-handed circular polarization switching

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0036] Example 1

[0037] A phased array antenna capable of switching left and right circular polarization includes N 2*2 TR sub-arrays, each TR sub-array contains 4 phased array antenna radiation units, and the number of TR channels in each TR sub-array 1*4; each phased array antenna radiation unit includes a patch and a feed point A located on the patch, and each phased array antenna radiation unit is fed by a single feed point. The structure of the TR sub-array is tile or brick;

[0038] The radiation unit of the phased array antenna and the feed point are placed in rotation, non-vertically or horizontally according to any included angle.

[0039] The structure of the TR sub-array is tile or brick. The transceiver channel module of each TR subarray includes 4 transceiver channels; each transceiver channel module includes a transceiver amplifier multifunctional circuit, an attenuation phase shift amplifier multifunctional circuit, a power supply control circuit, a wave con...

Example Embodiment

[0049] Example 2

[0050] A phased array antenna that realizes left and right circular polarization switching, including a TR channel module. The TR channel module adopts a CMOS multifunctional chip combined with a gallium arsenide chip, and the phased array radiation unit uses a single feed point excitation , each feed point is followed by a phase shifter, so a phased array antenna radiation unit corresponds to 1 TR channel, four radiation units are used as a TR sub-array, and the number of channels in each TR sub-array is 4*1, a total of 4 channels. The GaAs TR chip mainly completes the functions of polarization switching, transceiver switching, receiving link low-noise amplification, and transmitting link power amplification. Therefore, the GaAs TR chip consists of three parts: a switch, a low-noise amplifier, and a power amplifier. The silicon-based multifunctional chip mainly completes the phase shifting, attenuation and amplification functions of the signal, so the sili...

Example Embodiment

[0069] Example 3

[0070] Taking a phased array antenna with 8*8=64 elements as an example, image 3 The middle array contains N=16 sub-arrays, and each sub-array contains 2*2 array elements. The radiating unit is square, and the positions of the four units in the sub-array are rotated by 90°. The effect of this can make the effect better when the array scans the φ=45° section. Single feed point excitation, each feed point is followed by A phase shifter and an attenuator complement the phases of ɸ1, ɸ2, ɸ3, and ɸ4 respectively. By controlling the amplitude and phase of the phase shifter and attenuator, electromagnetic waves with different circular polarizations can be realized.

[0071] The polarized waves corresponding to the work include left-handed circular polarization, right-handed circular polarization, left-handed elliptical polarization and right-handed elliptical polarization.

[0072] The corresponding working phased array antenna has the same array radiation eleme...

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Abstract

The invention relates to the field of phased-array antennas, in particular to a phased-array antenna capable of realizing left-handed and right-handed circular polarization switching. The antenna comprises N 2 * 2 TR sub-arrays. Each TR sub-array comprises four phased-array antenna radiation units, and the number of TR channels of each TR sub-array is 1 * 4. Each phased-array antenna radiation unit comprises a patch and a feed point A located on the patch, and each phased-array antenna radiation unit is a single feed point. Only one set of phased-array antenna equipment in the scheme is used,the functions, such as left-handed and right-handed polarization switching, of two sets of phased-array antenna equipment in the past can be achieved, the cost and the structural size are greatly reduced, and the parasitic effect generated by using an active device is avoided. The antenna is mainly realized through an n-in-one multifunctional chip in combination with phased-array antenna layout.

Description

technical field [0001] The present application relates to the field of phased array antennas, in particular to a phased array antenna capable of switching left and right circular polarizations. Background technique [0002] The phased array antenna is an array antenna composed of many antenna units arranged in an array, and beam scanning and beam forming are realized by adjusting the feeding phase of each antenna unit. It has the advantages of small size, light weight, easy to form multiple beams, the ability to realize rapid changes in antenna beam pointing and beam shape, and the ability to adjust the communication capacity between beams. These advantages make it stable for tracking multiple high-speed moving targets. In addition, the phased array antenna can also realize the synthesis of signal power in space, so as to obtain a large EIRP (isotropic equivalent radiated power), which is to increase the system range, improve the system measurement accuracy and observation i...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q15/24H01Q21/00H01Q21/06H01Q21/20
CPCH01Q1/38H01Q1/50H01Q15/242H01Q21/0006H01Q21/065H01Q21/20
Inventor 刘雪颖刘昊余正冬马明凯张高峰
Owner CHENGDU RDW TECH CO LTD
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