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Low-loss 2-bit tunable bandpass filters using MEMS DC contact switches

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8 Author(s)
Pothier, A. ; Res. Inst. in Opt. & Microwave Commun., Limoges, France ; Orlianges, J.-C. ; Guizhen Zheng ; Champeaux, Corinne
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This paper presents the development of tunable filters using ohmic contact microelectromechanical system switches. It is shown that this type of switch is very well suited for the fabrication of low-loss high tuning-range microwave filters. Two sets of tunable Ku-band microstrip filters and resonators have been fabricated, with measured tuning ranges of 20% and 44%, and unloaded quality factors better than 75 in all cases. The 2-bit 5.7% fractional bandwidth, tunable bandpass filters exhibit insertion losses lower than 3.2 dB in all states.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:53 ,  Issue: 1 )