Satellite-borne phased-array receiving antenna testing system

Abstract

A satellite-borne phased-array receiving antenna testing system comprises the DBF (Digital Beam Forming) baseband physical stand-alone and the semi-physical testing upper computer of a satellite-borne phased-array receiving antenna; the DBF baseband physical stand-alone comprises an A / D converter group and a DBF baseband unit connected with the A / D converter group; the semi-physical testing upper computer comprises a test data transmission module, a multi-way D / A conversion PCI-E (Peripheral Component Interconnect Express) board card, a differential serial data PCI-E capture card, a test data receiving and processing module and a beam directional diagram calculating and drawing module; the test data transmission module is connected with the multi-way D / A conversion PCI-E board card; the differential serial data PCI-E capture card is connected with the DBF baseband unit; the test data receiving and processing module is respectively connected with the differential serial data PCI-E capture card, the beam directional diagram calculating and drawing module and the test data transmission module; the beam directional diagram calculating and drawing module is respectively connected with the test data receiving and processing module and the test data transmission module.

Description

technical field [0001] The invention relates to the technical field of aerospace electronic communication, in particular to a test system for a spaceborne phased array receiving antenna using half-in-the-loop testing. Background technique [0002] In the 1990s, multi-beam phased array antenna technology began to be used in communication satellites, which has the advantages of low loss and large-angle dynamic scanning, and is more representative such as the Globalstar and Iridium satellite systems in the United States. [0003] The basic idea of ​​beamforming in a multi-beam phased array antenna is to control the amplitude and phase of each feed point of the array antenna. Analog beamforming can be realized through the feed network at the radio frequency end, or digital beamforming can be realized at baseband or intermediate frequency through digital domain processing. In analog beamforming, once the beamforming scheme is determined, the beam shape, the intersection level of ...

AI Technical Summary

Problems solved by technology

The disadvantages of the all-physical test system are: 1) It is impossible to test the beam radiation pattern of the spaceborne phased array antenna; 2) The display is not intuitive and expensive, and it is very inflexible, and the communication system cannot be changed according to the test needs; 3) System construction The cycle time is long, and rapid testing is not possible

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