Abstract

A closed-loop adaptive antenna tuning unit operating from 850 MHz-2 GHz for multi-band, multi-mode radios is presented. Unlike previous approaches, the proposed module utilizes an analog mismatch detector and a closed-loop mixed-signal matching state search circuit, without the need for an A/D converter. The integrated module is designed and fabricated on a 0.18 μm CMOS process. When tested on a band-limited shorted patch antenna, the module can perform a scan of 4096 antenna matching states in 4.1 ms, and tune the antenna to a specified narrow instantaneous bandwidth over the entire frequency range.

Original languageEnglish (US)
Article number5594754
Pages (from-to)581-583
Number of pages3
JournalIEEE Microwave and Wireless Components Letters
Volume20
Issue number10
DOIs
StatePublished - Oct 1 2010

Keywords

  • Analog processing
  • antenna tuning unit
  • impedance matching
  • reconfigurable matching networks

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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