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

fYear

2006

fDate

2-6 Oct. 2006

Firstpage

1887

Lastpage

1890

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2006. IEEE

Conference_Location

Vancouver, BC

ISSN

1051-0117

Print_ISBN

1-4244-0201-8

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2006.476

Filename

4152332