Chapter 6. Impedance-Matching Networks

  1. Devendra K. Misra

Published Online: 25 AUG 2004

DOI: 10.1002/0471653764.ch6

Radio-Frequency and Microwave Communication Circuits: Analysis and Design, Second Edition

Radio-Frequency and Microwave Communication Circuits: Analysis and Design, Second Edition

How to Cite

Misra, D. K. (2004) Impedance-Matching Networks, in Radio-Frequency and Microwave Communication Circuits: Analysis and Design, Second Edition, John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/0471653764.ch6

Author Information

  1. University of Wisconsin-Milwaukee, USA

Publication History

  1. Published Online: 25 AUG 2004
  2. Published Print: 17 AUG 2004

ISBN Information

Print ISBN: 9780471478737

Online ISBN: 9780471653769

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Keywords:

  • reactive-element matching;
  • stub matching;
  • resistive matching;
  • lumped-element matching

Summary

One of the most critical requirements in the design of high-frequency electronic circuits is that the maximum possible signal energy is transferred at each point. In other words, the signal should propagate in a forward direction with a negligible echo (ideally, zero). Echo signal not only reduces the power available but also deteriorates the signal quality due to the presence of multiple reflections. The impedance can be transformed to a new value by adjusting the turn ratio of a transformer that couples it with the circuit. However, it has several limitations. This chapter presents a few techniques to design other impedance transforming networks. These circuits include transmission line stubs, and resistive and reactive networks. Further, the techniques introduced are needed in active circuit design at RF and microwave frequencies.