Title :
Low-loss and compact V-band MEMS-based analog tunable bandpass filters
Author :
Kim, Hong-Teuk ; Park, Jae-Hyoung ; Kim, Yong-Kweon ; Kwon, Youngwoo
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
This paper presents compact V-band MEMS-based analog tunable bandpass filters with improved tuning ranges and low losses. For compact size and wide tuning range, the two-pole filters are designed using the lumped-elements topology with metal-air-metal (MAM) bridge-type capacitors as tuning elements. Capacitive inter-resonator coupling has been employed to minimize the radiation loss, which is the main loss contributor at high frequencies. Two filters have been demonstrated at 50 and 65 GHz. The 65-GHz analog tunable filter showed a frequency tuning bandwidth of 10% (6.5 GHz) with low and flat insertion losses of 3.3 /spl plusmn/ 0.2 dB over the entire tuning range.
Keywords :
band-pass filters; capacitors; circuit tuning; equivalent circuits; losses; lumped parameter networks; micromechanical devices; millimetre wave filters; passive filters; resonator filters; 3.3 dB; 50 GHz; 6.5 GHz; 65 GHz; EHF; MEMS-based filters; MM-wave filter; V-band filters; analog tunable bandpass filters; capacitive inter-resonator coupling; capacitor tuning elements; compact filters; equivalent circuit; low-loss bandpass filters; lumped-elements topology; metal-air-metal bridge-type capacitors; micromachined variable capacitors; radiation loss minimization; two-pole filters; wide tuning range; Band pass filters; Capacitors; Couplings; Dielectric losses; Frequency; Magnetic separation; Microwave filters; Resonator filters; Topology; Tuning;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2002.805543
