Title :
An Improved Isolation W-CDMA Ladder BAW-SMR Filter
Author :
Shirakawa, A.A. ; Pham, J.-M. ; Jarry, P. ; Kerherve, E. ; David, J.-B. ; Dumont, F. ; Belot, D.
Author_Institution :
Univ. of Bordeaux, Bordeaux
Abstract :
This paper presents a ladder BAW-SMR filter with improved isolation for application in W-CDMA reception band (2.11- 2.17 GHz). The high isolation is achieved by placing one transmission zero at the W-CDMA transmission band (1.92 -1.98 GHz). It could be implemented thanks to a design technique that employs bonding wires to introduce transmission zeros. This technique enables to increase the rejection of ladder BAW filters. The filter presents: 1.6 dB of insertion loss, -16 dB of return loss and isolation higher than 35 dB at TX band (1.92 -1.98 GHz).
Keywords :
UHF filters; bulk acoustic wave devices; code division multiple access; ladder filters; resonator filters; TX band; W-CDMA reception band; W-CDMA transmission band; bulk acoustic wave filters; frequency 1.92 GHz to 1.98 GHz; frequency 2.11 GHz to 2.17 GHz; insertion loss; ladder BAW-SMR filter; loss 1.6 dB; loss 16 dB; return loss; solidly mounted resonators; Active circuits; Band pass filters; Bonding; Filtering theory; Isolation technology; Multiaccess communication; Passband; Radio frequency; Resonator filters; Wires; BAW filter; SMR; ladder;
Conference_Titel :
Electronics, Circuits and Systems, 2006. ICECS '06. 13th IEEE International Conference on
Conference_Location :
Nice
Print_ISBN :
1-4244-0395-2
Electronic_ISBN :
1-4244-0395-2
DOI :
10.1109/ICECS.2006.379970
