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Ku Band High-Q Tunable Surface-Mounted Cavity Resonator Using RF MEMS Varactors

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6 Author(s)
Stefanini, R. ; XLIM, Univ. de Limoges, Limoges, France ; Martinez, J.D. ; Chatras, M. ; Pothier, A.
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This paper presents a 14 GHz high-Q (quality factor) tunable resonator using microelectromechanical system (MEMS) varactors. A brass surface mountable cavity has been bonded on a fused silica wafer on which are processed three 1.1 mm long MEMS varactors. Their location has been optimized in order to obtain a wide frequency shift, when the cantilevers are actuated on the substrate. 15% tuning range from 11.9 GHz to 14.2 GHz has been obtained with a continuous shift from 11.9 GHz to 13.6 GHz. Measurements result in an average unloaded quality factor (Qu) of 480 over the operating frequency band.

Published in:

Microwave and Wireless Components Letters, IEEE  (Volume:21 ,  Issue: 5 )

Date of Publication:

May 2011

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