Reconfigurable RF impedance tuner for match control in broadband wireless devices

Richard B. Whatley, Zhen Zhou, Kathleen L. Melde

Research output: Contribution to journalArticlepeer-review

42 Scopus citations


This paper presents the design of a broadband RF impedance tuner that is part of a dynamically reconfigurable automatic match control (AMC) circuit that can be used for a wide variety of wireless devices and intelligent RF front ends. The impedance tuner can be used at the input of wireless devices in order to provide a significantly broader bandwidth or to reconfigure the impedance match spectrum. The tuner uses a microstrip loaded-line circuit topology with multiple stubs that each have a varactor diode located at the end. The results show that the tuner can achieve a broadband impedance match for a wide variety of loads that are either purely resistive or that have a large reactance as well.

Original languageEnglish (US)
Pages (from-to)470-478
Number of pages9
JournalIEEE Transactions on Antennas and Propagation
Issue number2
StatePublished - Feb 2006


  • Automatic match control (AMC)
  • Intelligent RF front ends
  • Reconfigurable tuner

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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