Title :
New high-performance and low-loss SAW filters used in ultra-wideband cellular radio systems
Author :
Hikita, M. ; Tabuchi, T. ; Shibagaki, N. ; Akagi, T. ; Ishida, Y.
Author_Institution :
Hitachi Ltd., Tokyo, Japan
Abstract :
Several new technologies are reported for the design of high-performance and low-loss surface acoustic wave (SAW) filters used in ultra-wideband cellular radios. Among them, new configurations for wideband bandpass filters applicable as receiver filters have been developed. These configurations allow 3- or 4-dB insertion loss and sharp-cutoff frequency responses. New structures for wideband band-rejection filters applicable as transmitter final stage filters have also been developed. Their use results in loss as low as 1.4 dB as well as high-power characteristics. A SAW front-end module constructed with SAW filters, with a low-noise amplifier, and with a single balanced mixer is described
Keywords :
band-pass filters; band-stop filters; cellular radio; design engineering; frequency response; radio receivers; surface acoustic wave filters; 1.4 dB; 3 dB; 4 dB; SAW filters; SAW front-end module; design; high-performance; high-power characteristics; insertion loss; low-loss; low-noise amplifier; new configurations; receiver filters; sharp-cutoff frequency responses; single balanced mixer; surface acoustic wave; transmitter final stage filters; ultra-wideband cellular radio systems; wideband band-rejection filters; wideband bandpass filters; Acoustic waves; Band pass filters; Frequency; Insertion loss; Land mobile radio cellular systems; Low-noise amplifiers; Radio transmitters; SAW filters; Surface acoustic waves; Ultra wideband technology;
Conference_Titel :
Ultrasonics Symposium, 1991. Proceedings., IEEE 1991
Conference_Location :
Orlando, FL
DOI :
10.1109/ULTSYM.1991.234158
