A spaceborne nadir and limb integrated detection antenna feed system and method

Abstract

The invention discloses a satellite-borne nadir and adjacent-edge integrated detection antenna feed system. The satellite-borne nadir and adjacent-edge integrated detection antenna feed system comprises an adjacent-edge detection antenna, a nadir detection antenna, a polarized separator and a quasi-optical feed network; the adjacent-edge detection antenna adopts a dual-biased cassegrain antenna, and comprises a first main paraboloid of opposite polarity, a secondary hyperboloid of opposite polarity and a plane fold-back mirror; the nadir detection antenna adopts a single-biased paraboloid antenna and comprises a second main paraboloid of opposite polarity, a plane fold-back mirror 1 and a plane fold-back mirror 2, wherein the plane fold-back mirror, the plane fold-back mirror 1 and the plane fold-back mirror 2 are used for changing wave beam propagation direction; the polarized separator is realized by adopting a polarized grid mesh and used for selecting a horizontally-polarized adjacent-edge detection signal and a perpendicularly-polarized nadir detection signal; and the quasi-optical feed network consists of multiple frequency selection surfaces, an ellipsoidal mirror, a hyperbolic mirror and a plane mirror, wherein the frequency selection surfaces are used for separating multi-channel signals, folding back and converging the channel signals through the plane mirror, the hyperbolic mirror and ellipsoidal mirror, and then feeding the signals to each feed source horn.

Description

technical field [0001] The invention belongs to the technical field of aerospace microwave passive remote sensing radiometers, and in particular relates to an antenna feed system and method for simultaneous detection of two modes of spaceborne nadir and limb. Background technique [0002] Terahertz detection technology is one of the important development directions of spaceborne remote sensors, and plays an important role in atmospheric remote sensing and ice cloud detection. It has the characteristics of wide coverage, high precision, all-weather, and continuous data. It is especially suitable for studying the source and sink of trace components in the atmosphere and improving the detection accuracy of atmospheric temperature and humidity profiles. Combined with the existing methods of microwave remote sensing, visible light, infrared and ultraviolet detection, the payload products can be used in the fields of disaster warning, environmental protection and climate change, a...

AI Technical Summary

Problems solved by technology

These nadir and limb detection instruments have played an important role in the monitoring of the atmospheric environment, but the disadvantage is that the detection mode is single. During the limb detection, due to the interference of the surface, the composition of the bottom atmosphere cannot be detected.

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