Single-channel radio direction finding system

Abstract

The invention discloses a single-channel radio direction finding system. The single-channel radio direction finding system comprises an antenna array, a single-pole double-throw radio frequency switch module, a radio frequency receiving channel, a spectral analysis module, a control module and an output display module, wherein the antenna array is connected with the single-pole double-throw radio frequency switch module, the single-pole double-throw radio frequency switch module is connected with the radio frequency receiving channel, the radio frequency receiving channel is connected with the spectral analysis module, the spectral analysis module is connected with the control module, and the control module is connected with the single-pole double-throw radio frequency switch module and the output display module. The single-channel radio direction finding system is used for solving the problem of radio direction finding in the communication application, the military application and the like, the antenna array which is controlled by a high-speed radio frequency switch and carries out periodic switching is adopted, and measurement of the radio incident direction is achieved through analysis of frequency spectrum components of a received radio signal. The single-channel radio direction finding system is applicable to rapid radio direction finding needing low hardware complexity and low cost.

Description

technical field [0001] The invention relates to the technical field of antenna engineering, in particular to a single-channel radio direction-finding system for realizing radio direction-finding by using a single radio frequency channel. Background technique [0002] Traditional radio direction-finding technology generally consists of antenna arrays, multi-channel receivers and controllers, and output display modules, such as phase interferometers, and direction-finding arrays based on super-resolution spatial spectrum estimation. Compared with the single-channel direction-finding system, the direction-finding system with multiple radio frequency channels has the disadvantages of complex hardware structure and high cost. At the same time, the amplitude and phase consistency of each radio frequency channel is required to be better, and additional correction equipment is required. Chinese patent "A single-channel radiolocation and direction-finding system and its direction-fin...

AI Technical Summary

Problems solved by technology

Compared with the single-channel direction-finding system, the direction-finding system with multiple radio frequency channels has the disadvantages of complex hardware structure and high cost. At the same time, the amplitude and phase consistency of each radio frequency channel is required to be good, and additional correction equipment is required.

Chinese patent "A single-channel radiolocation and direction-finding system and its direction-finding method" (patent application number: 201010598996.2) proposes a single-channel direction-finding method, which uses a switch to switch between antenna units distributed around the circumference. The phase relationship of radio signals received on adjacent antenna units is used to perform direction finding, but this direction finding method requires that only one radio signal is incident in a direction finding cycle

When multiple radio signals are incident at the same time, the resulting phase relationship is confused, causing direction finding failure

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