DocumentCode
3413909
Title
Receiver design simplified by SAW coupled resonator filters
Author
Iseli, Jerry
Author_Institution
RF Monolithics Inc., Dallas, TX, USA
fYear
1988
fDate
2-5 Oct 1988
Firstpage
209
Abstract
An improvement in conventional superheterodyne receiver systems has been realized through a use of low-loss surface acoustic wave (SAW) filters. With SAW technology, single-conversion VHF-UHF receivers can now be easily implemented. The problem of image and spurious signal rejection when converting directly from VHF and UHF ranges to low intermediate frequencies, such as 455 kHz, is solved by the high-performance two-pole SAW coupled resonator filters with selective null placement. A two-channel guard receiver is presented that illustrates this technology. The guard receiver achieves a 10 dB S+N/N sensitivity of -110.5 dBm and an image frequency rejection of greater than 80 dB
Keywords
acoustic resonators; radio receivers; surface acoustic wave filters; 455 kHz; SAW coupled resonator filters; VHF-UHF receivers; image rejection; selective null placement; spurious signal rejection; superheterodyne receiver systems; two-channel guard receiver; Band pass filters; Filtering; Frequency conversion; Image converters; Mixers; Passband; Radio frequency; Receiving antennas; Resonator filters; Surface acoustic waves;
fLanguage
English
Publisher
ieee
Conference_Titel
Ultrasonics Symposium, 1988. Proceedings., IEEE 1988
Conference_Location
Chicago, IL
Type
conf
DOI
10.1109/ULTSYM.1988.49369
Filename
49369
Link To Document