Multi-frequency shared high-efficiency compact field feed source system

Abstract

The invention relates to a multi-frequency shared high-efficiency compact field feed source system which comprises a first transmitting feed source, a second transmitting feed source, a third transmitting feed source, a fourth transmitting feed source, a first receiving feed source, a second receiving feed source, a fourth receiving feed source and a rotatable feed source support panel. The feed sources are symmetrically distributed on two sides of the panel by taking the panel axis as an axis. The whole feed source panel is installed on a mechanical slide rail, and the feed source system canbe switched between an antenna measurement mode and an RCS measurement mode through the movement of the slide rail and the control of the control unit. When RCS measurement is carried out, the slide rail returns to the initial position, the center of the feed source panel is located at the focal point of the reflecting surface, and broadband RCS measurement can be realized by controlling the radiofrequency switch of the transceiving feed source through the control unit. When antenna measurement is carried out, the slide rail moves the receiving feed source of the measurement frequency band tothe focal point of the reflecting surface so as to carry out antenna measurement, and the horizontal polarization isolation degree between the feed sources can be greatly improved through the micro rotation of the feed source panel. According to the multi-band and multi-measurement-mode compact field feed source system, the test efficiency is greatly improved, and the test efficiency of large-scale and ultra-large-scale compact field test fields is obviously improved. Meanwhile, due to the improvement of the test efficiency, broadband sweep frequency measurement during continuous scanning ofthe turntable becomes possible.

Description

technical field [0001] The invention relates to the technical field of compact field feed sources, in particular to a multi-frequency shared high-efficiency compact field feed source system. Background technique [0002] The compact field technology is a commonly used electromagnetic measurement technology, which forms a plane electromagnetic wave at a short distance through the near-field focusing principle, and realizes the measurement of antenna parameters or target scattering characteristics. With the evolution of compact field technology and changes in user needs, the compact field has become very large, and the corresponding cost has also increased to hundreds of millions. Such a large site can provide a relatively large quiet area to meet the measurement requirements for large objects to be measured, but it also brings a very high cost of use. In order to reduce the cost of use, the most reliable and effective way is to improve the test efficiency of the compact fiel...

AI Technical Summary

Problems solved by technology

Such a large site can provide a relatively large quiet area to meet the measurement needs of large DUTs, but it also brings a very large cost of use

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