GNSS occultation locating antenna with stable phase center

Abstract

The invention provides a GNSS occultation locating antenna with a stable phase center. A metal fixing screw penetrates through the centers of a bottom layer radiation piece, a second layer radiation piece and a top layer radiation piece, medium fixing screws separately penetrate through the four corners of the bottom layer radiation piece, the second layer radiation piece and the top layer radiation piece so as to fix the bottom layer radiation piece, the second layer radiation piece and the top layer radiation piece above an antenna substrate in sequence; a feed network is clung to a lower surface of the antenna substrate and provides phases of 0 degree, 90 degrees, 180 degrees and 270 degrees, and equipower allocation signals; and a feed pin penetrates through the antenna substrate and the bottom layer radiation piece to connect the second layer radiation piece and the feed network, and the feed pin is not in contact with the antenna substrate or the bottom layer radiation piece. The antenna provided by the invention has excellent circular polarization performance, a firm structure, a simple process and a wide frequency band, has wider beam coverage, higher gain and better phase center stability, and is suitable for precise locating systems.

Description

technical field [0001] The invention relates to a circularly polarized antenna for high-precision detection. Background technique [0002] In recent years, China has begun to study a method of detecting the earth's atmospheric environment based on radio signals of satellite systems such as GPS and Beidou: satellite radio signals are affected by atmospheric refraction when passing through the earth's atmosphere, and the propagation path is bent, causing the user's receiver to receive By measuring these delays, information such as temperature, pressure, humidity, and electron density in the atmosphere can be obtained. In order to improve the accuracy of occultation detection and inversion, a detection system based on Global Navigation Satellite System (GNSS) is proposed. As a key component of the GNSS occultation detection system, high-precision occultation positioning antenna technology has become an urgent problem to be solved. [0003] The occultation positioning antenna ...

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