DocumentCode :
2482798
Title :
P6G-3 Switchable SAW Filter Bank with Both Narrow & Wide Channel Bandwidth and 10 Channels SAW Filter Bank
Author :
Jiangsheng Liu ; Shitang He ; Shunzhou Li ; Jiuling Liu ; Yong Liang
Author_Institution :
Chinese Acad. of Sci., Beijing
fYear :
2007
fDate :
28-31 Oct. 2007
Firstpage :
2578
Lastpage :
2581
Abstract :
The design and testing of 8 channels and 10 channels low loss switchable SAW filter bank is described. There are both narrow & wide channel bandwidths in 8 channels filter bank. The 1 dB bandwidth of narrow channel is about 0.3% and that of wide channel more than 3.2 MHz. Cascade-connected two stages are constructed to achieve higher stop-band rejection. Every narrow bandwidth channel is constructed with two same SPUDT SAW filter on ST-X quartz with insertion loss less than 6 dB and stop-band rejection more than 40 dB. Each wide bandwidth channel includes of a fan-type SPUDT filter on X-112degY LiTaO3 with insertion loss less than 10 dB and a longitudinally-coupled DMS filter on 36degY-X LiTaO3 less than 2 dB. The experimental 8 channels SAW filter bank results in insertion loss less than 12.5 dB and stop-band rejection more than 70 dB. In 10 channels filter bank, the individual filter consists of fan-type SPUDT on X-112degY LiTaO3 with insertion loss of less than 12 dB, stop-band rejection more than 40 dB, magnitude ripples in pass-band less than 0.5 dB and nonlinear phase less than 2deg per 1 MHz. The experimental 10 channels filter bank results in insertion loss of 14.6 dB, deviation of insertion loss among different channels less than 0.5 dB, and stop-band rejection more than 40 dB.
Keywords :
band-stop filters; channel bank filters; lithium compounds; surface acoustic wave filters; surface acoustic wave transducers; switched filters; LiTaO3; SPUDT SAW filter; ST-X quartz; cascade-connection; channel bandwidth; fan-type SPUDT filter; insertion loss; longitudinally-coupled DMS filter; pass-band; stop-band rejection; switchable SAW filter bank; Band pass filters; Bandwidth; Channel bank filters; Filter bank; Frequency; Insertion loss; Narrowband; SAW filters; Switches; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 2007. IEEE
Conference_Location :
New York, NY
ISSN :
1051-0117
Print_ISBN :
978-1-4244-1384-3
Electronic_ISBN :
1051-0117
Type :
conf
DOI :
10.1109/ULTSYM.2007.649
Filename :
4410222
Link To Document :
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