Title :
0.8 GHz to 2.4 GHz Tunable Ceramic Microwave Bandpass Filters
Author :
Al-Ahmad, Mahmoud ; Matz, Richard ; Russer, Peter
Author_Institution :
Siemens AG, Corp. Technol, Munich
Abstract :
A 200% tuning range of advanced integrated piezoelectric LTCC bandpass filters is presented. The filter incorporates a novel parallel-plate capacitor that can be tuned by a piezoelectrically movable electrode. In this prototype, the fabrication process is modified for better controlling the air-gap inside the capacitor. To our knowledge, the potential recorded tuning range from 0.8 GHz to 2.4 GHz is the highest continuous range that ever reported in bandpass filters.
Keywords :
UHF filters; band-pass filters; circuit tuning; crystal filters; microwave filters; varactors; LTCC coupled microstrip lines; fabrication process; frequency 0.8 GHz to 2.4 GHz; parallel-plate capacitor; piezoelectric LTCC filters; piezoelectrically movable electrode; surface-mounted piezoceramic cantilever; tunable ceramic microwave bandpass filters; varactor; Band pass filters; Capacitors; Ceramics; Electrodes; Frequency; High K dielectric materials; High-K gate dielectrics; Tunable circuits and devices; Tuning; Varactors; Ceramics; piezoelectric materials; software defined radio; tunable filter; varactors;
Conference_Titel :
Microwave Symposium, 2007. IEEE/MTT-S International
Conference_Location :
Honolulu, HI
Print_ISBN :
1-4244-0688-9
Electronic_ISBN :
0149-645X
DOI :
10.1109/MWSYM.2007.379995
