Impedance matching adjusting method and impedance matching circuit

Abstract

The invention provides a method for adjusting impedance matching and an impedance matching circuit. The method comprises the following steps: acquiring load impedance and source impedance of the impedance matching circuit; calculating input impedance according to the load impedance; if the absolute value of a first difference value between the resistance value of the input impedance and the resistance value of the source impedance exceeds a first preset value, and / or the absolute value of a second difference value between the reactance value of the input impedance and the reactance value of the source impedance exceeds a second preset value, outputting an adjusting signal to adjust the number of accessed capacitors and inductors in the impedance matching circuit, the absolute value of the first difference value does not exceed the first preset value, and the absolute value of the second difference value does not exceed the second preset value. According to the impedance matching method and device, the number of the capacitors and the number of the inductors needing to be connected are obtained through calculation, the actual connection of the inductors and the capacitors in the impedance matching network is changed according to the number, impedance matching is achieved, the capacitors and the inductors can be rapidly and accurately changed by changing the connection number of the capacitors and the inductors, and the impedance matching problem is solved.

Description

technical field

[0001] The present application relates to the technical field of electronic appliances, in particular to a method for adjusting impedance matching and an impedance matching circuit. Background technique

[0002] In the practical application of radio frequency systems, the problem of impedance matching between cascaded circuits is often encountered, which seriously affects the transmission of signals and energy. Therefore, the optimal matching of impedance is an essential work in radio frequency systems. Existing impedance matchers usually change the inductance or capacitance in the matching network to achieve impedance matching. Generally, variable capacitors and variable inductors are used. The variable capacitors and variable inductors can be adjusted by stepping motors to realize the matching network. Impedance matching can be achieved by changing the value of capacitance or inductance.

[0003] A variable capacitor consists of a series of parallel metal ...

Examples

Embodiment Construction

[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0028] figure 1 It is a schematic flowchart of an impedance matching adjustment method in an embodiment of the present application. refer to figure 1 , with this...

technical field

[0001] The present application relates to the technical field of electronic appliances, in particular to a method for adjusting impedance matching and an impedance matching circuit. Background technique

[0002] In the practical application of radio frequency systems, the problem of impedance matching between cascaded circuits is often encountered, which seriously affects the transmission of signals and energy. Therefore, the optimal matching of impedance is an essential work in radio frequency systems. Existing impedance matchers usually change the inductance or capacitance in the matching network to achieve impedance matching. Generally, variable capacitors and variable inductors are used. The variable capacitors and variable inductors can be adjusted by stepping motors to realize the matching network. Impedance matching can be achieved by changing the value of capacitance or inductance.

[0003] A variable capacitor consists of a series of parallel metal ...

Examples

Embodiment Construction

[0027] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0028] figure 1 It is a schematic flowchart of an impedance matching adjustment method in an embodiment of the present application. refer to figure 1 , with this...

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