A Novel Short Focal Length Amplitude Modulation Phase Modulation Constricted Field Device and Test Method Based on Transmissive Metasurface

Abstract

A novel short focal length amplitude modulation phase modulation constriction field and testing method based on transmission metasurface, comprising a test production line mechanical shaft conveyor belt used for running the equipment to be tested, the test production line mechanical shaft conveyor belt A metasurface constriction field collimator in the 2.6GHz frequency band and a metasurface constriction field collimator in the 3.5GHz frequency band are respectively arranged above, and the metasurface constriction field collimator in the 2.6GHz frequency band and the metasurface constriction field in the 3.5GHz frequency band are arranged above. The field collimators are respectively connected with feed antennas, and the electromagnetic waves emitted by the feed antennas pass through the metasurface and generate quiet zone plane waves in the fixed area of ​​the mechanical rotating shaft conveyor belt of the test production line. The invention realizes the functions of amplitude modulation and phase modulation independently through the transmissive metasurface structure, and combines the above two metamaterial structures in a short focal length to generate a plane wave quiet zone, which is suitable for the Sub6GHz frequency band, and can be applied to commercial production line tests to improve the test. efficiency.

Description

technical field [0001] The invention relates to the technical field of constriction fields, in particular to a novel short focal length amplitude modulation phase modulation constriction field device and a testing method based on a transmission metasurface. Background technique [0002] 5G construction has entered a stage of rapid development. According to relevant agreements, 5G frequency bands are mainly divided into Sub6GHz and millimeter wave frequency bands. China's three major operators mainly use Sub6GHz frequency bands. Different frequency band division also means that the relevant test technology has also changed. As a relatively mature test method, the tight field will also be changed according to different test requirements. The compression field is mainly divided into reflection type compression field and transmission type compression field. The related technology of reflection type compression field is relatively mature. The main design scheme is reflective surf...

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Problems solved by technology

The compression field is mainly divided into reflection type compression field and transmission type compression field. The related technology of reflection type compression field is relatively mature. The main design scheme is reflection surface compression field, including single reflection surface and multi-reflection surface. Good quiet zone indicator; transmission-type pinching field includes metasurface pinching field and holographic pinching field. Holographic pinching field is characterized by low cost and easy processing, but its disadvantages are narrow frequency band and long focal length, and it is mostly suitable for terahertz

At present, the application of the sub6GHz frequency band compression field mostly adopts the reflection surface compression field, but the solution is huge and expensive

In addition, there are few research programs on metasurface contraction field, and most of them use larger focal lengths, which bring many restrictions to actual tests

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