A high frequency microwave radiometer optical system and a design method thereof

By using a combined parabolic mirror structure and the far-field integration method to determine the antenna phase center, the problems of insufficient signal coupling efficiency and transmission stability in traditional high-frequency microwave radiometer optical systems are solved, enabling efficient coupling of multiple signal sources and wide-range monitoring.

CN122409700APending Publication Date: 2026-07-17JILIN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-24
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Traditional high-frequency microwave radiometer optical systems cannot efficiently couple multiple signal sources, have a fixed observation range, and lack a systematic method for determining the antenna phase center, resulting in insufficient signal coupling efficiency and transmission stability.

Method used

A combined parabolic mirror structure is adopted, including a main rotating parabolic mirror and a fixed parabolic mirror. Combined with a servo motor drive and a conical corrugated horn antenna, it can achieve efficient coupling of multiple signal sources and wide-range beam scanning, and determine the antenna phase center by far-field integration method.

Benefits of technology

It achieves efficient and stable coupling of multiple signal sources, reduces calibration signal transmission loss, meets the needs of wide-range atmospheric monitoring, and improves signal coupling efficiency and transmission stability.

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Abstract

The application discloses a kind of high-frequency microwave radiometer optical systems and its design method, belong to microwave remote sensing technical field.The system includes by servo motor driven main rotating parabolic mirror, two fixed parabolic mirrors respectively fixed at cold load and hot load interface, and cone wave corrugated horn antenna placed at the focal point of main mirror;Main rotating parabolic mirror can be scanned from 0 to 180 Β°, receive atmospheric radiation signal and the calibration parallel signal reflected by fixed mirror, converge to antenna.The application also provides a kind of general design method, through parallel selection, far-field integration method accurately calibrates antenna phase center, and ensure that it coincides with the focal point of main mirror.The application adopts combined parabolic mirror structure to realize the efficient coupling of multiple signal sources, has wide-range beam scanning capability, and replaces artificial experience alignment through systematic phase center calibration, significantly improves signal coupling efficiency and transmission stability, suitable for high-frequency radiometer development.
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