DocumentCode :
393192
Title :
Low loss and high stopband rejection switchable SAW filter bank
Author :
He, Shitang ; Li, Honglang ; Li, Shunzhou ; Xie, Shu
Author_Institution :
Inst. of Acoust., Chinese Acad. of Sci., Beijing, China
Volume :
1
fYear :
2002
fDate :
8-11 Oct. 2002
Firstpage :
193
Abstract :
The design and testing of low loss, high stopband rejection 16 channel switchable SAW filter bank using ST quartz as substrate is described. In order to decrease the insertion loss, the individual filters used for bank consisted of SPUDT with the insertion loss of less than 6 dB. Both input and output switches are used instead of input interconnection network and output switch to decrease the insertion loss of input interconnection network. The cascade-connected two stages are constructed to increase the stopband rejection. An amplifier is put between two stages to compensate loss of signal-to-noise. The experimental filter bank results in insertion loss of less than 13.5dB(include the insertion loss of four-stage switch), stopband rejection of more than 70 dB.
Keywords :
dielectric losses; frequency response; piezoelectric materials; quartz; surface acoustic wave filters; SPUDT; ST quartz; amplifier; cascade-connected two stages; high stopband rejection switchable SAW filter bank; input interconnection network; input switches; insertion loss; low loss rejection switchable SAW filter bank; output switch; output switches; signal-to-noise loss; Acoustic reflection; Bandwidth; Channel bank filters; Filter bank; Frequency synthesizers; Insertion loss; Multiprocessor interconnection networks; SAW filters; Switches; Transducers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 2002. Proceedings. 2002 IEEE
ISSN :
1051-0117
Print_ISBN :
0-7803-7582-3
Type :
conf
DOI :
10.1109/ULTSYM.2002.1193382
Filename :
1193382
Link To Document :
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