Method for achieving reflector antenna beam two-dimensional scanning

An antenna beam, two-dimensional scanning technology, applied to antennas, electrical components, etc., can solve the problems of unable to achieve continuous beam scanning, complex feeding system, low efficiency of the antenna mouth, etc., to achieve high beam design flexibility, feeding The effect of simple system connection relationship and high antenna port efficiency

Active Publication Date: 2014-05-14
XIAN INSTITUE OF SPACE RADIO TECH
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  • Abstract
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  • Claims
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Problems solved by technology

In the above two methods, either the efficiency of the antenna surface is low, or the feeding system is complex, and the continuous scanning of the beam cannot be realized when the beam is switched through the multi-port matrix amplifier.

Method used

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  • Method for achieving reflector antenna beam two-dimensional scanning
  • Method for achieving reflector antenna beam two-dimensional scanning
  • Method for achieving reflector antenna beam two-dimensional scanning

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Embodiment

[0031] Embodiment: According to the above idea, a reflector antenna for hybrid two-dimensional scanning is designed. The physical aperture of the reflector is a circular aperture antenna with a diameter of 26m. The antenna feed array has a total of 143 feed sources, and the scanning range is two-dimensional ± 2°. The schematic diagram of the feed array used is shown in image 3 shown. It should be noted that the layout of the feed array is not limited to image 3 The rectangles shown are regularly arranged.

[0032] In order to maximize the output efficiency of the amplifier, the amplifiers of each feed channel in the following design work in a saturated state, and the amplitude of each feed source is equal when it works, and the beam change is only realized by the change of the feed source and the weighting of the phase.

[0033] Figure 4 The reference beam, that is, the feed used when the beam points to (0°,0°), is given; Figure 5 The feed used when the beam is pointed...

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Abstract

The invention relates to a method for achieving reflector antenna beam two-dimensional scanning. Each feed source (6) in a feed source array is connected with a power distribution network (2) through a corresponding feed channel, and each feed channel comprises an amplifier (5), a phase shifter (4) and an attenuator (3). According to the method for achieving the reflector antenna beam two-dimensional scanning, working states of the amplifiers in the feed channels are selected through adjustment of the attenuators of the feed channels, the selection of stimulation feed source positions and/or weighting of feed amplitude are/is achieved afterwards, large angle scan spans can be achieved, a reflector antenna has higher aperture efficiency, and phase weighting of antenna feed can be achieved through phase deploy of the phase shifters in the feed channels. According to the method for achieving the reflector antenna beam two-dimensional scanning, the complexity of an antenna feed system can be reduced, the aperture efficiency of the antenna can be improved, beam scanning capacity is more flexible, and reliability is higher.

Description

technical field [0001] The invention relates to a method for realizing two-dimensional scanning of a reflection surface antenna beam and belongs to the field of reflection surface antenna design. Background technique [0002] Such as figure 1 As shown, the reflector antenna includes an antenna reflector 11 and a feed source array 12 . The traditional way to realize two-dimensional scanning of the beam through the reflector antenna is to use a phased array feed to feed the reflector, and to compensate the phase difference formed by the reflector during scanning through the forward push of the feed array and the phase weighting of the array elements; Or use the combination feed technology to realize the change of the feed network through the multi-port matrix amplifier. In the above two methods, either the antenna aperture efficiency is low, or the feeding system is complex, and continuous scanning of the beam cannot be realized when the beam is switched through the multi-po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q19/12H01Q3/30
Inventor 赵泓懿刘波张艳君
Owner XIAN INSTITUE OF SPACE RADIO TECH
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