Title :
A Novel Design of Tunable Band-Stop Filter Using MEMS Technology
Author :
Huang, J.-M. ; Zhu, F. ; Deng, Z.L.
Author_Institution :
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
A novel design of tunable band-stop filter is presented using MEMS technology. The MEMS bridge is used as the moveable structure to tune the frequency of the band-stop filter. The basic cell is designed on the coplanar waveguide (CPW) transmission line. When the bridge is at up-state, the centre resonant frequency of the basic cell is 20.3 GHz. When the bridge is at down-state, the centre resonant frequency of the basic cell is 23.44 GHz. The 20 dB bandwidth reaches 2.87 GHz. Return loss is less than 0.5 dB in the stop-band. The band-stop filter is cascaded by three basic cells. It can be tuned from 23.4 to 18.2 GHz, when the MEMS bridge is changed from up to down state.
Keywords :
band-stop filters; coplanar transmission lines; coplanar waveguide components; micromechanical devices; microwave filters; CPW transmission line; MEMS bridge; MEMS technology; basic cell; centre resonant frequency; coplanar waveguide; down state; frequency 2.87 GHz; frequency 23.4 GHz to 18.2 GHz; gain 20 dB; microelectromechanical systems; microwave filter; return loss; tunable band-stop filter; up state; Band pass filters; Bridge circuits; Capacitance; Coplanar waveguides; Micromechanical devices; Microwave filters; Millimeter wave technology; Resonant frequency; Resonator filters; Tunable circuits and devices;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5303190
