Title :
Application of a stopband multistrip coupler in a SAW resonator filter
Author :
Soluch, Waldemar
fDate :
Oct. 31 1994-Nov. 3 1994
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;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401589
