Folded type SAW filters with minimised group delay deviation

Author

Omori, T. ; Tajima, M. ; Hashimoto, K. ; Yamaguchi, M. ; Horiuchi, H. ; Kadota, M.

Author_Institution

Chiba Univ., Japan

fYear

2000

fDate

2000

Firstpage

296

Lastpage

300

Abstract

Aiming at realising the frequency response with small group delay deviation and wide passband width, we propose miniaturised surface acoustic wave (SAW) filters having folded propagation path and employing a straight edge mirror reflector for SH-type SAWs. In a filter fabricated on a PZT substrate, the group delay deviation of less than ±15 ns and passband width of 5% were obtained at the centre frequency of 100 MHz. The experimental result and theoretical prediction were in good agreement with each other

Keywords

circuit simulation; frequency response; piezoelectric materials; substrates; surface acoustic wave filters; 100 MHz; PZT; PZT substrate; PbZrO3TiO3; SAW filters; SH-type SAW; centre frequency 100 MHz; folded propagation path; frequency response; miniaturised surface acoustic wave filters; minimised group delay deviation; passband width; straight edge mirror reflector; Band pass filters; Delay; Frequency; Mirrors; Passband; Resonator filters; SAW filters; Shape control; Surface acoustic waves; Transversal filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International

Conference_Location

Kansas City, MO

ISSN

1075-6787

Print_ISBN

0-7803-5838-4

Type

conf

DOI

10.1109/FREQ.2000.887369

Filename

887369