Switchable Bandpass Filter with Capacitive MEMS Switches and EBG Structures
This paper presents a new switchable band pass filter based on electromagnetic band-gap (EBG) and coplanar-waveguide (CPW) structures and tuned by the MEMS shunt and series capacitive switches. By tuning the bridge height of the MEMS switches with low voltages (lower than 14.5v), the center frequency would be shifted with almost constant bandwidth. Proposed structure has smaller chip size and lower insertion (better than 0.375 dB) in mid band frequencies. Results show using MEMS technology and EBG structures not only improve the performance of the filter, but also they optimize the chip size. Therefore, it is suitable for radars, wireless, safe and multi-frequency communication systems.
Z. Taheri and K. Maphinejad, "Switchable Bandpass Filter with Capacitive MEMS Switches and EBG Structures", Advanced Materials Research, Vols. 403-408, pp. 4162-4166, 2012