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Distributed MEMS analog phase shifter with enhanced tuning

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2 Author(s)
McFeetors, G. ; Dept. of Electr. & Comput. Eng., Univ. of Calgary, Alta. ; Okoniewski, M.

The design, fabrication, and measurement of a tunable microwave phase shifter is described. The phase shifter combines two techniques: a distributed capacitance transmission line phase shifter, and a large tuning range radio frequency (RF) microelectromechanical system (MEMS) capacitor. The resulting device is a large bandwidth, continuously tunable, low-loss phase shifter, with state-of-the-art performance. Measurements indicate analog tuning of 170deg phase shift per dB loss is possible at 40 GHz, with a 538deg phase shift per centimeter. The structure is realized with high-Q MEMS varactors, capable of tuning C max/Cmin= 3.4. To our knowledge, this presents the lowest loss analog millimeter wave phase shifter performance to date

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:16 ,  Issue: 1 )

Date of Publication:

Jan. 2006

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