Method for rapidly tuning impedance matching of antenna tuner

Abstract

The invention relates to a method for rapidly tuning impedance matching of an antenna tuner. An initial impedance value of matching turning is provided through impedance detection; an optimized threshold value of a matching network is provided through standing-wave ratio detection, and the matching conditions of a circuit are balanced; the matching network is an n-type matching network, a front n capacitor C1 and an inductor L are formed through binary cell arrays, and a fixed value is adopted to a back n capacitor C2; a binary cell array circuit is characterized by 1 being formed by connecting a plurality of branches in parallel, wherein each branch is formed by connecting a switch and a capacitor C in series; 2 being formed by connecting branches in series, wherein each branch is formed by connecting a switch and an inductor L. The method includes the steps of detecting the initial impedance, judging whether the capacitor C2 is connected or not, conducting impedance detection again, calculating the value of the inductor L and the value of the capacitor C1, and judging increased or decreased stepping magnitude according to the impedance deviation degree and the turning frequency band. The method has the advantages of being capable of achieving rapid matching of the input impedance of an antenna, fast in adjusting speed, simple in operation and capable of ensuring the turning speed .

Description

technical field [0001] The invention relates to a wireless communication device, in particular to a method for realizing fast tuning of an antenna tuner for impedance matching. Background technique [0002] At present, with the development of communication technology, there are more and more applications of long-distance short-wave communication. Especially in earthquake relief in recent years, this communication transmission method that does not rely on relay stations has received great attention. Due to the large size of the antenna of the short-wave radio station, the antenna radiation unit is easily affected by the surrounding environment. Long-distance short-wave radio stations require extremely high transmission power. Since the input impedance of the antenna changes significantly with the surrounding environment, when the antenna impedance changes, the impedance between the transmitter and the antenna will become mismatched. The impedance mismatch between t...

AI Technical Summary

Problems solved by technology

The impedance mismatch between the antenna and the feeder will cause part of the output power of the final stage of the transmitter sent by the feeder to be reflected back by the antenna, which will affect the normal working state of the final power amplifier, and may cause the final power amplifier to heat up and even burn out, reducing the power consumption of the final power amplifier. The emission efficiency of the system has potential safety hazards

The antenna tuner is to tune the match between the antenna impedance and the output impedance of the radio station. The traditional antenna tuner mostly uses the optimal solution optimization algorithm such as genetic algorithm, which is complicated to calculate and consumes a lot of computer resources, which seriously affects the tuning speed of the antenna tuner.

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