Title :
A tunable ultra-wideband band-stop filter based on EBG structures using MEMS technology
Author :
Deng, Z.L. ; Zhang, N.B. ; Huang, J.-M.
Author_Institution :
Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
An ultra-wideband (UWB) band-stop filter (BSF) is presented using novel design to tune the resonant frequency by micro-electromechanical systems´ (MEMS) switch, based on electromagnetic band-gap (EBG) and coplanar-waveguide (CPW) structures. The model of the compact BSF is cascaded by three EBG resonators. The BSF is operated from 15 to 20 GHz with good stop rejection and sharp roll off frequency. Its stop rejection levels are -30 dB in both the lower and upper stopband, and return loss is less than 0.5 dB in the stop-band. A tunable BSF is designed by tuning the frequency using a folded MEMS switch. The center frequency of stop-band of BSF is changed from 5 to 15 GHz, by tuning the switch height of MEMS switch.
Keywords :
band-stop filters; coplanar waveguides; microswitches; microwave filters; photonic band gap; ultra wideband technology; EBG structures; MEMS technology; UWB band-stop filter; center frequency; coplanar waveguide structures; electromagnetic band-gap; folded MEMS switch; frequency 15 GHz to 20 GHz; microelectromechanical systems switch; resonant frequency; return loss; sharp roll off frequency; tunable ultra-wideband band-stop filter; Metamaterials; Microelectromechanical systems; Micromechanical devices; Microswitches; Periodic structures; Resonant frequency; Resonator filters; Switches; Tuning; Ultra wideband technology; Band-stop filter (BSF); Electromagnetic bandgap (EBG); Radio frequency (RF) Microelectromechanical systems (MEMS); Tunable;
Conference_Titel :
Mechatronics and Automation, 2009. ICMA 2009. International Conference on
Conference_Location :
Changchun
Print_ISBN :
978-1-4244-2692-8
Electronic_ISBN :
978-1-4244-2693-5
DOI :
10.1109/ICMA.2009.5246121
