论文信息 - Analog tunable matching network using integrated thin-film BST capacitors

Analog tunable matching network using integrated thin-film BST capacitors

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 efficiency from 420MHz to 500MHz. ACPR measurements are presented on the latter network showing ACPR1 of >50 dBc at 27 dBm drive power.

R.A. York | L.-Y. Vicki Chen | R. Forse | D. Chase

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