Antenna adaptive impedance matcher and matching method thereof

Abstract

The invention provides an antenna adaptive impedance matcher and a matching method. The antenna adaptive impedance matcher comprises a sampling module, a control module and an impedance matching circuit, wherein the input end of the sampling module is connected with the output end of an antenna load, and the output end of the sampling module is connected with the input end of the control module; the sampling module is used for sampling an output electric signal of the antenna load, and transmitting a sampling result to the control module; the output end of the control module is connected withthe input end of the impedance matching circuit; the control module is used for generating an adjustment signal according to the sampling result and transmitting the adjustment signal to the impedancematching circuit; the impedance matching circuit is used for adjusting the impedance value of a transmission wire according to the adjustment signal, so that the impedance value of the transmission wire is matched with the impedance value of the antenna load, the technical problem that a fixed matching network-based impedance matching technology is not adaptive to wide frequency band impedance matching can be solved, and the technical effect that the communication quality of a satellite phone is adaptive to impedance matching without being affected by position changes and is improved can be achieved.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to an antenna adaptive impedance matcher and a matching method. Background technique [0002] At present, satellite phones have been widely used in emergency communication support work. Changes in the working environment and relative positions will cause changes in the field distribution of the satellite phone antenna, and the impedance value of the antenna will also change accordingly, resulting in antenna load Mismatch with the transmission line. Impedance mismatch will reduce power transmission efficiency, response linearity and output signal power, seriously affecting the call quality of satellite phones. [0003] In order to avoid the above situation, the usual practice is to insert another passive network between the source and the load, which is usually regarded as a matching network. The purpose of the matching network is to achieve impedance transformation, to match the ...

AI Technical Summary

Problems solved by technology

Satellite telephone communication generally works in broadband bands: Ku band (12-40GHz), K band (18-27GHz), Ka band (26.5-40GHz), etc. Impedance matching technology based on fixed matching network is no longer applicable, broadband impedance The matching problem needs to be solved urgently

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