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Post-CMOS micromachined RF varactor with mutual-isolated large-tuning capacitor and low-voltage actuator

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2 Author(s)
Gu, L. ; Chinese Acad. of Sci., Shanghai ; Li, X.

A micromachined tunable capacitor is presented with the variable capacitor electrically isolated from the electrostatic actuator for flexible circuit application. Fabricated in low-resisitivity silicon wafer with CMOS-compatible processes, the device exhibits a large tuning range of 218% under 4 V driving, as well as a high Q-factor of 115 at 1 GHz and a high self-resonance frequency of 9.5 GHz.

Published in:
Electronics Letters  (Volume:43 ,  Issue: 15 )

Date of Publication: July 19 2007

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