Analog tunable matching network using integrated thin-film BST capacitors

  title={Analog tunable matching network using integrated thin-film BST capacitors},
  author={L.-Y. Vicki Chen and R. Forse and D. Chase and R. A. York},
  journal={2004 IEEE MTT-S International Microwave Symposium Digest (IEEE Cat. No.04CH37535)},
  pages={261-264 Vol.1}
This paper presents an electronically tunable impedance transformer and matching network for RF applications, utilizing thin-film barium strontium titanate (BST) tunable capacitors in an integrated-passive network on sapphire. The impedance transformer can be electronically varied from a 4:1 to 2:1 transformation in a 50 ohm environment. A slight modification of this circuit is shown to provide a match for a highly-reactive integrated antenna allowing the antenna to be used with improved… CONTINUE READING
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