Method and device for realizing intelligent self-adaption impedance matching adjustment

Abstract

The invention discloses a method for realizing intelligent self-adaption impedance matching adjustment. The method comprises the following steps: choosing a mode of an impedance matching network by a mobile terminal according to the current state of the mobile terminal; sampling an actual impedance measured value of a sent signal; and performing the matching adjustment for the actual impedance measured value by the impedance matching network according to a preset target characteristic impedance value. The invention also discloses a device for realizing intelligent self-adaption impedance matching adjustment. By using the method and device provided by the invention, the mobile terminal is ensured to realize different impedance matching under various application environments, communication states and individualized requirements and so that the mobile terminal can be kept in an optimal working state all the time.

Description

technical field [0001] The present invention relates to a wireless terminal signal transmission technology, in particular to a method and device capable of self-adaptive impedance matching adjustment. Background technique [0002] With the development of mobile communications, mobile terminals play an increasingly important role in people's lives. During the use of a mobile terminal, the performance of the antenna directly determines the strength of the transmitted signal, so the performance of the antenna becomes the most important indicator to measure the quality of the mobile terminal. When debugging the antenna, it is often found that the efficiency of the passive antenna of the mobile terminal is improved, but the total radiated power (Total Radiated Power, TRP) is still not high, which is due to the impedance mismatch of the power amplifier (Power Amplifier, PA). Generally, impedance matching refers to a working state in which the load impedance and the internal imped...

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Problems solved by technology

However, the above methods all have some common shortcomings, such as fixed matching forms, which is not conducive to the adjustment of broadband points; only multiple fixed matching forms can be selected in advance, and if more selections are made, the matching forms will be complicated and redundant, and each There are two kinds of combination forms, which are quite independent and fixed, and there is no fine-tuning function, which brings inconvenience to the designer's debugging. At the same time, due to the subtle differences inside each mobile terminal, the effect is also uneven; Therefore, when the mobile terminal is in a low-voltage or low-temperature state, the performance will drop sharply, which will seriously affect the call quality

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