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

fYear

2009

fDate

Sept. 29 2009-Oct. 1 2009

Firstpage

1708

Lastpage

1711

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; circuit tuning; micromechanical devices; microwave filters; radiofrequency filters; Ku bands; RF MEMS; X bands; analogue-series MEMS capacitors; bandwidth tunability; centre frequencies; digital-shunt MEMS capacitors; frequency 10 GHz to 14 GHz; frequency tuning; full-wave simulations; independent control; tunable bandpass filter; Band pass filters; Bandwidth; Capacitors; Circuit optimization; Circuit simulation; Frequency; Micromechanical devices; Radiofrequency microelectromechanical systems; Tunable circuits and devices; Tuning;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. EuMC 2009. European

Conference_Location

Rome

Print_ISBN

978-1-4244-4748-0

Type

conf

Filename

5296302