Compact range distributed plane wave generator based on Luneberg lens

Abstract

The invention provides a compact range distributed plane wave generator based on a Luneberg lens. The generator comprises a feed source array unit, a feed network unit, a distributed Luneberg lens array unit, a vector network analyzer and an array antenna bracket which are arranged in a darkroom; the feed source array unit is fixedly mounted on the array antenna bracket; the distributed Luneberg lens array unit comprises X Luneberg lenses, the X Luneberg lenses are in one-to-one correspondence with X antenna units; and the feed network unit adopts an amplitude-phase simulator. The Luneberg lenses are used for generating plane waves; compared with a traditional far-field test, the plane wave generator can assist in saving space; the plane wave generator is suitable for a broadband test; the area for generating the plane waves can be expanded; and array building flexibility is high. The Luneberg lenses are manufactured by using a foaming process, the weight of the Luneberg lenses is lighter; and the plurality of Luneberg lenses can be operated separately, so that the operation is more flexible and convenient; and the amplitude-phase simulator is adopted, so that feed adjustment is realized conveniently and quickly, a more stable radiation source can be generated, and plane wave transformation can be carried out.

Description

technical field [0001] The invention relates to the technical field of microwave anechoic chamber measurement, in particular to a compact field distributed plane wave generator based on a Lunberg lens. Background technique [0002] During the test of the antenna system, in order to meet the consistency of the electromagnetic energy radiated to the receiving antenna, the electromagnetic wave reaching the receiving antenna should preferably have plane wave characteristics, that is, satisfy the far-field condition. Generally, the distance at which the antenna satisfies the far-field condition is 6-10λ, which means that a very large test space is required for the test of the low-frequency antenna. In order to meet the test far-field conditions with the smallest possible distance, it is necessary to rely on the compact field technology, which has the advantages of all-weather, good security, low background level, and wide operating frequency bandwidth. However, the existing compa...

AI Technical Summary

Problems solved by technology

In order to meet the test far-field conditions with the smallest possible distance, it is necessary to rely on the compact field technology, which has the advantages of all-weather, good confidentiality, low background level, and wide operating frequency bandwidth. However, the existing compact field technology has relatively large dimensions. Large, the formed plane wave area is small, the working bandwidth is narrow, and the precision requirements are high.

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