Laminated quasi-optical feed network structure and adjusting method thereof

Abstract

The invention relates to a laminated quasi-optical feed network structure, which comprises a quasi-optical component mounting plate, an upper-layer feed system and a lower-layer feed system. The upper-layer feed system and the lower-layer feed system are arranged on the quasi-optical component mounting plate. Each of the upper-layer feed system and the lower-layer feed system at least comprises anellipsoidal mirror, a feed source horn, a frequency selective surface / polarization grid mesh and a plane mirror. The upper layer and the lower layer of the quasi-optical component mounting plate aresymmetrically provided with measuring reference pieces. The ellipsoidal mirror is provided with a measuring reference plane and at least one measuring reference hole. The frequency selective surface / polarization grid mesh is connected with the quasi-optical component mounting plate through a bracket; a mounting plane and a measurement reference hole are formed in the bracket According to the invention, for elimination of accumulated assembly errors of the laminated quasi-optical feed network system, the included angle between the mechanical axis direction and the electrical axis direction of each frequency band is calculated according to the planar near-field electrical performance test result of each frequency band link, and correction is carried out by adjusting the direction and orientation of a feed source horn by means of a multi-degree-of-freedom feed source horn adjusting and supporting tool.

Description

technical field [0001] The invention relates to the technical field of testing and adjusting the assembly accuracy of quasi-optical feeding components, in particular to a laminated quasi-optical feeding network structure and an adjusting method thereof. Background technique [0002] In order to meet the requirements of time and space resolution for practical applications, geostationary orbit detection needs to work in the microwave high frequency band. And the sounder is a multi-frequency, multi-polarization radiometer system. The purpose is that the sounder can simultaneously collect observation data of several different frequencies and different polarization channels when observing the earth, and then can obtain as much as possible of the atmosphere and surface information. Realize three-dimensional detection of various physical characteristics such as atmospheric temperature, humidity, precipitation, and ice water content in clouds. Since all frequency and polarization ...

AI Technical Summary

Problems solved by technology

On the one hand, it solves the problem of assembly accuracy of a single quasi-optical component. On the other hand, it eliminates the cumulative assembly error through the combination of mechanical measurement and electrical performance testing, and realizes the micron-level assembly accuracy of the laminated quasi-optical feeding component.

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