基于定向耦合器的高动态范围矢量阻抗测量模块设计

doi:10.16180/j.cnki.issn1007-7820.2023.11.003

Abstract

Abstract:

In view of the design difficulties of the vector impedance measurement module with a high dynamic range, this study designs a vector impedance measurement module based on the directional coupler using the directional coupler combined with the high-dynamic-range RF (Radio Frequency) logarithmic amplifier. The hardware and software design framework is given, the mathematical principle of the module is deduced, and the experimental verification and testing of the module are completed. The design makes full use of the characteristics of directional coupler, and the test system is small in size, good in scalability, fast in test speed and high in efficiency. The design can also be extended to a monitoring and measuring module, which can be used in communication equipment as an antenna monitoring component or power intensity control component of communication transmitter. After the verification, a number of practical applications have been developed using this design scheme. The high dynamic range of the proposed designed covers the application scenarios from 20~400 W, and obtains good application effect, which proves that the proposed design has good application, expansibility and high practical value.

Key words: directional coupler, vector impedance, dynamic range, impedance measurement, reflection coefficient, phase difference, incident signal, reflected signal

CLC Number:

TN98

WANG Peng,LI Xiangyu. Design of High-Dynamic-Range Vector Impedance Measurement Module Based on Directional Coupler[J].Electronic Science and Technology, 2023, 36(11): 14-18.

Figures/Tables 7

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References 20

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Design of High-Dynamic-Range Vector Impedance Measurement Module Based on Directional Coupler

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