Title :
A tunable asymmetric notch filter using RFMEMS
Author :
De Luis, Javier R. ; Morris, Arthur S., III ; Gu, Qizheng ; De Flaviis, Franco
Author_Institution :
Wispry Inc., Irvine, CA, USA
Abstract :
In this paper, a single pole single zero asymmetric notch filter using RF micro electromechanical tunable capacitors is presented. The high Q value of the tunable capacitors enables this filter to achieve 25.5 dB rejection with less than 1.2 dB insertion loss over a 5 MHz signal bandwidth. This tunable filter is designed to suppress transmission leakage in the IMT Band I (1.92-1.98 GHz) band for handset WCDMA receivers. It also can serve as a component in handset tunable duplexers.
Keywords :
capacitors; code division multiple access; micromechanical devices; notch filters; radio receivers; IMT Band I; RF microelectromechanical tunable capacitors; bandwidth 5 MHz; frequency 1.92 GHz to 1.98 GHz; handset WCDMA receivers; handset tunable duplexers; single pole single zero asymmetric notch filter; transmission leakage suppression; tunable asymmetric notch filter; Capacitors; Cellular phones; Insertion loss; Magnetic separation; Multiaccess communication; Radio frequency; Radiofrequency microelectromechanical systems; Resonator filters; SAW filters; Telephone sets; RFMEMS; cell phone front end; duplexer; notch filter; reject filter; software defined radio; tunable capacitors; tunable filter;
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2010.5515957
