This paper presents a new concept for the design of reconfigurable bandpass filters with very high unloaded Q-factor using rectangular waveguide resonators loaded with a reconfigurable E-plane circuit. Ohmic MEMS switches are placed around E-plane metal strips so as to modify the TE101 mode resonant frequency, thus the central frequency of the filters. Tuning ranges up to 7% are achieved with unloaded Q-factors over 1000. Preliminary measurements of a 3rd order bandpass hardwired filter at 10 GHz show 625 MHz frequency shift (6.25%) with unloaded Q-factors above 1000 and small variations of both the filter bandwidth and return loss. The final version using actual RF MEMS is presently under fabrication at FBK.
MEMS-based High-Q E-plane Reconfigurable Filters
FARINELLI, PAOLA;SORRENTINO, Roberto
2011
Abstract
This paper presents a new concept for the design of reconfigurable bandpass filters with very high unloaded Q-factor using rectangular waveguide resonators loaded with a reconfigurable E-plane circuit. Ohmic MEMS switches are placed around E-plane metal strips so as to modify the TE101 mode resonant frequency, thus the central frequency of the filters. Tuning ranges up to 7% are achieved with unloaded Q-factors over 1000. Preliminary measurements of a 3rd order bandpass hardwired filter at 10 GHz show 625 MHz frequency shift (6.25%) with unloaded Q-factors above 1000 and small variations of both the filter bandwidth and return loss. The final version using actual RF MEMS is presently under fabrication at FBK.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
