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Tunable stop-band filter at Q-band based on RF-MEMS metamaterials

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4 Author(s)
Gil, I. ; Univ. Autbnoma de Barcelona, Barcelona ; Martin, F. ; Rottenberg, X. ; De Raedt, W.

Presented for the first time is a metamaterial transmission line that combines complementary split ring resonators (CSRRs) and RF microelectromechanical systems (RF-MEMS). The device consists of a coplanar waveguide structure loaded in its central strip with CSRRs embedding RF-MEMS variable capacitors. Owing to the presence of the CSRRs, the structure behaves as a stop-band filter. Through the actuation of the electrostatic RF-MEMS devices, the electrical characteristics of the CSRRs are modified so that their resonance frequency, and as a result the central frequency of the stop-band filter, can be tuned. This is the first time that an RF-MEMS tunable metamaterial-based filter has been designed for operation at Q-band.

Published in:

Electronics Letters  (Volume:43 ,  Issue: 21 )