Impedance matching device and method

A technology of impedance matching and equivalent impedance, applied in electrical components, transmission systems, etc., can solve the problems of complex circuit design, complex matching circuit, and difficult implementation of mobile wireless devices, shorten the cycle of design and debugging, and reduce interference , the effect of saving time

Inactive Publication Date: 2014-04-09
ZTE CORP
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  • Abstract
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Problems solved by technology

However, the circuit design of the mobile wireless device is complex and difficult to realize
[0009] In the prior art, since the above-mentioned circuits need to be manually or mechanically adjusted, the matching time is too long, so it will enter another electromagnetic environment before the matching is completed; in addition, the above-mentioned solutions also have complex matching circuits and are difficult to implement Relatively large, expensive, poor feasibility and other issues

Method used

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  • Impedance matching device and method
  • Impedance matching device and method

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Embodiment Construction

[0043] The basic idea of ​​the present invention is: according to the reflected signal strength S N And the power P of the RF power amplifier n , the control voltage of the equivalent impedance is adjusted through the corresponding decision conditions, so as to realize the adaptive matching of the RF power amplifier and the matching target.

[0044] The impedance matching device provided by the present invention is located between the RF power amplifier of the mobile terminal, the chip and the matching target, such as figure 1 As shown, including: detection circuit, decision circuit and matching control circuit; where,

[0045] A detection circuit for sampling and detecting the reflected signal strength S reflected from the matching target N ; Among them, N is the number of samples;

[0046] Judgment circuit, used for judging the matching state of the matching network in the matching control circuit according to the judgment condition;

[0047] The matching control circuit...

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Abstract

A device and a method for impedance matching are disclosed. According to reflected signal intensity SN and power Pn of a radio power amplifier, the control voltage of equivalent impedance is adjusted through a corresponding judging condition, thereby adaptive matching is realized between the radio power amplifier and a matching object. Utilizing the device and the method, designing of an adaptive matching circuit is simplified, the period of handset designing and debugging is shortened, the practical applicability of the adaptive matching circuit is improved, and the quality of handset calling is enhanced, and the stability and linearity of the radio power amplifier and the radio performance index of the complete handset are improved completely.

Description

technical field [0001] The invention relates to impedance matching technology, in particular to an adaptive impedance matching device and method. Background technique [0002] In the research and development process of mobile terminals such as mobile phones, usually one model corresponds to one antenna, which increases the workload of antenna design, prolongs the research and development cycle of mobile terminals, and wastes labor costs and a large amount of experimental resources. [0003] In the process of daily use of mobile phones, various communication failures are often encountered. For example, when using mobile phones to make calls, changes in the call site, changes in the position and posture of holding the mobile phone, etc., will lead to poor call quality. This is because the input impedance of the antenna actually used is not a fixed value and depends to a considerable extent on its surrounding environment. Therefore, when the environment of the mobile phone chan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/04H04B1/16
CPCH04B1/0458
Inventor 周占荣丁国林
Owner ZTE CORP
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