Title :
Saw duplexer design for WCDMA system
Author :
Shiba, Takashi ; Hikino, Osamu ; Kondo, Seima ; Kamogawa, Naoko
Author_Institution :
Hitachi Media Electron. Co., Ltd., Yokohama, Japan
Abstract :
Some relations between sensitivity performances and duplexer performances (losses, isolations between Tx and Rx terminals) are obtained. We simulate system noise figure levels from duplexer performances and low noise amplifier parameters by using a nonlinear NF model at the viewpoint of a system design. A nonlinear equivalent circuit model is proposed for analyzing distortion of SAW duplexer. Inter modulation distortion parameters are directly calculated by using the above nonlinear model. Consequently, desired duplexer performances to achieve sufficient system performances of WCDMA terminals can be determined by these procedures.
Keywords :
acoustic transducers; code division multiple access; code division multiplexing; intermodulation distortion; surface acoustic wave devices; SAW duplexer design; SAW duplexer distortion analysis; WCDMA system; WCDMA terminals; duplexer performances; intermodulation distortion parameters; low noise amplifier parameters; nonlinear equivalent circuit model; nonlinear noise figure model; sensitivity performances; system noise figure levels; Circuit noise; Circuit simulation; Equivalent circuits; Low-noise amplifiers; Multiaccess communication; Noise figure; Noise level; Noise measurement; Nonlinear distortion; Surface acoustic waves;
Conference_Titel :
Ultrasonics Symposium (IUS), 2009 IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-4389-5
Electronic_ISBN :
1948-5719
DOI :
10.1109/ULTSYM.2009.5441474
