Title :
Centre frequency and bandwidth tunable bandpass filter based on RF MEMS (10–14GHz)
Author :
Fernández-Bolaños, Montserrat ; Dehollain, Catherine ; Ayoz, Suat ; Nicole, Pierre ; Ionescu, Adrian M.
Author_Institution :
Nanoelectronic Device Lab. (NanoLab), Ecole Polytech. Fed. de Lausanne (EPFL), Lausanne, Switzerland
Abstract :
This paper presents a novel tunable bandpass filter design with independent control of both the centre frequency and the bandwidth by means of analogue-series and digital-shunt MEMS capacitors. The filter is designed for operation in X and Ku bands with 4 pre-selected centre frequencies (from 10 GHz to 14 GHz) and with a bandwidth tunability of 70% (variable between 500 MHz and 1 GHz). The filter originally includes a fine frequency tuning to correct the centre frequency position that slightly and intrinsically shifts when tuning the bandwidth. An accurate physical circuit model is proposed and demonstrated to be in good agreement with the full-wave simulations. The devices are currently under fabrication and measurements results will be presented at the conference.
Keywords :
band-pass filters; capacitors; circuit simulation; circuit tuning; micromechanical devices; microwave filters; Ku band; RF MEMS; X band; analogue-series capacitor; bandwidth tunable bandpass filter; centre frequency; digital-shunt MEMS capacitor; frequency 10 GHz to 14 GHz; frequency 500 MHz to 1 GHz; full-wave simulations; physical circuit model; tuning; Band pass filters; Bandwidth; Capacitors; Circuit optimization; Circuit simulation; Frequency; Micromechanical devices; Radiofrequency microelectromechanical systems; Tunable circuits and devices; Tuning;
Conference_Titel :
Microwave Integrated Circuits Conference, 2009. EuMIC 2009. European
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4749-7
