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

fYear

2007

fDate

3-8 June 2007

Firstpage

1615

Lastpage

1618

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium, 2007. IEEE/MTT-S International

Conference_Location

Honolulu, HI

ISSN

0149-645X

Print_ISBN

1-4244-0688-9

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2007.379995

Filename

4264156