Title :
P2N-4 Investigation of Attenuation Increase at Lower-Side Frequency Bands of SAW- and SMR-Filters
Author :
Hikita, M. ; Minami, K. ; Takimoto, H. ; Shibagaki, N. ; Sakiyama, K.
Author_Institution :
Kogakuin Univ., Tokyo
Abstract :
High attenuation characteristics are required at transmitter frequency bands, i.e. lower-side frequency ranges, for receiver SAW, FBAR, and SMR filters especially used in CDMA systems, where transmission and reception are performed simultaneously. We showed possibility of new chip-level improvement for attenuation characteristics at these frequency bands without external inductors and capacitors. Experimental results for SAW filters and simulation results for SMR filters are presented. Non-linear characteristics of SAW filters, the most important issue for SAW duplexers, are also discussed
Keywords :
code division multiple access; surface acoustic wave filters; CDMA system; FBAR; SAW duplexer; SAW filter; SMR filter; attenuation characteristics; capacitors; external inductors; lower-side frequency band; receiver SAW; transmitter frequency band; Attenuation; Frequency; Impedance; Inductors; Insertion loss; Multiaccess communication; Resonator filters; SAW filters; Surface acoustic waves; Transmitters;
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
DOI :
10.1109/ULTSYM.2006.476
