Application of a stopband multistrip coupler in a SAW resonator filter

Author

Soluch, Waldemar

Volume

1

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

249

Abstract

Experimental and theoretical results are presented for the amplitude frequency responses of a SAW two-pole resonator filter with a stopband multistrip coupler (SMSC). Two resonators are placed side-by-side and the SMSC is formed by connecting open aluminium strips of reflectors. As compared with ordinary MSC, application of a SMSC makes the resonators shorter. Therefore, the two nearest longitudinal modes are moved away, and better rejection is obtained near the passband. The filter was fabricated on the ST-cut quartz at the center frequency of about 300 MHz. For a single SMSC, the insertion loss at the center frequency was about -20 dB (in a 50 Ω system) and a stopband rejection was about -40 dB

Keywords

band-stop filters; frequency response; quartz; surface acoustic wave couplers; surface acoustic wave resonator filters; -20 dB; 300 MHz; SAW resonator filter; ST-cut quartz; SiO₂; amplitude frequency responses; center frequency; insertion loss; longitudinal modes; open aluminium strips; stopband multistrip coupler; stopband rejection; two-pole resonator filter; Bandstop filters; Quartz materials/devices; Surface acoustic wave couplers; Surface acoustic wave resonator filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401589

Filename

401589