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Integrated Adaptive Impedance Matching Using Phase Shifters

  • THEORY OF RADIO CIRCUITS
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Abstract

This paper proposes an integrated adaptive impedance matching system using phase shifters to transform dynamically varying complex load impedances for conjugate matching. The system comprises mismatch detector, control circuit, and variable elements. Variable phase shifter is much easier to make compared to variable inductor and capacitor. It has low parasitics, high Q-factor, highly linear, and can be made to have wide tuning range. It is more superior than variable inductor/capacitor at ultra-high microwave frequencies. The equations and design methodologies for the adaptive impedance matching system are presented, including a few methods to automatically control the phase shifters. The impedance matching domains are also analyzed. A few simulation examples are presented. The simulation results confirm the effectiveness of the system.

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  1. Department of Electrical and Electronic Engineering, Universiti Tunku Abdul Rahman, Bandar Sungai Long, 43000, Kajang, Selangor, Malaysia

    Chung Boon Kuan

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Chung Boon Kuan Integrated Adaptive Impedance Matching Using Phase Shifters. J. Commun. Technol. Electron. 66 (Suppl 2), S185–S193 (2021). https://doi.org/10.1134/S1064226921140084

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