A portable radio range extending impedance matching network adaptive adjustment method

By analyzing the battery terminal voltage signal and transmission duty cycle, and combining a memory tuning table and an adaptive convergence algorithm, the tuning capacitor settings are dynamically adjusted, solving the impedance mismatch problem of portable radios under changes in power supply and signal mode, and improving communication efficiency and stability.

CN122137363APending Publication Date: 2026-06-02SHAANXI CHANGLING HUAYUAN AEROSPACE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHAANXI CHANGLING HUAYUAN AEROSPACE TECH CO LTD
Filing Date
2026-05-08
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing portable radios struggle to adapt effectively to impedance mismatch issues caused by battery voltage fluctuations and changes in transmission duty cycle when power supply status and signal transmission modes change, thus affecting communication efficiency and stability.

Method used

By extracting the battery terminal voltage signal and transmission duty cycle from the radio frequency front end, analyzing the battery terminal voltage drop pattern, and combining a memory tuning table and an adaptive convergence algorithm, the tuning capacitor level is dynamically adjusted to generate an impedance mismatch tuning scheme and optimize the matching network settings.

Benefits of technology

It enables precise assessment and adjustment of reflected power and load line tilt, improving the impedance matching efficiency and signal transmission stability of the radio under complex conditions, and providing reliable range extension performance.

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Abstract

This application provides an adaptive adjustment method for impedance matching network of a portable radio range extender, comprising: extracting the battery terminal voltage signal and transmit duty cycle from the radio's RF front end; analyzing the battery terminal voltage signal to identify the battery terminal voltage drop pattern and determining the tilt attitude of the drain dynamic load line under the depth of discharge; using an adaptive convergence algorithm to link the rising and falling direction of the tuning capacitor position with the reflection recovery pattern, and when the rising and falling direction is positive, increasing the tuning capacitor position; otherwise, decreasing the position to form a matching network setting; updating the rearranged links of the frequency positions in the memory tuning table according to the matching network setting to generate an adaptive adjustment link; and combining the adaptive adjustment link with the current battery terminal voltage drop pattern and the tilt attitude of the drain dynamic load line to optimize the reflection recovery pattern and determine the impedance mismatch tuning scheme.
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