Title :
V-band bandpass filter with continuously variable centre frequency
Author :
Psychogiou, Dimitra ; Peroulis, Dimitrios ; Yunjia Li ; Hafner, Christian
Author_Institution :
Dept. of Inf. Technol. & Electr. Eng., ETH Zurich, Zurich, Switzerland
Abstract :
A second-order bandpass filter (BPF) with continuously variable centre frequency tuning is presented in this article. Evanescent-mode cavity resonators with variable capacitive loadings are used as tuning elements. Tuning is achieved by means of micro-electromechanical-systems (MEMS)-actuated highly conductive rigid fingers that feature an out-of-plane deflection. For an applied DC bias voltage between 0 and 27.3 V the centre frequency of the BPF is tuned from 67.4 to 63.2 GHz (4.2 GHz). For this frequency band, the fractional bandwidth (FBW) varies between 8.3 and 3.4% and the in-band insertion loss between 1.45 and 5 dB.
Keywords :
band-pass filters; cavity resonators; BPF; DC bias voltage; MEMS; V-band bandpass filter; evanescent mode cavity resonators; frequency 67.4 GHz to 63.2 GHz; gain 1.45 dB; gain 5 dB; out-of-plane deflection; tuning elements; variable capacitive loadings; variable centre frequency; voltage 27.3 V;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2012.0722