Title :
Miniature SAW duplexers with high power capability
Author :
Kamogawa, N. ; Dokai, S. ; Shibagaki, N. ; Hikita, M. ; Shiba, T. ; Ogawa, S. ; Wakamori, S. ; Sakiyama, K. ; Ide, T. ; Hosaka, N.
Author_Institution :
Hitachi Media Electron. Co. Ltd., Yokohama, Japan
Abstract :
Miniature SAW duplexers with high power capability corresponding to future GSM power regulation have been reported. We applied an improved cascade resonator structure to the duplexer in order to equalize power density on substrate. Power durability of the developed duplexers is verified by an experiment under the condition of 3/8 duty mode operation corresponding to future regulation. Furthermore, we reduce the coplanarity of the duplexer using a partial metalized patterning on the back of the base board. A 14.8×8.0×1.8 mm dimension structure and a 80 micron (80 micron improvement as compared with conventional structure) typical coplanarity is obtained for the duplexer
Keywords :
antenna accessories; cellular radio; equivalent circuits; packaging; surface acoustic wave resonator filters; GSM power regulation; cascade resonator structure; coplanarity reduction; high power capability; miniature SAW duplexers; partial metalized patterning; power density; Costs; Degradation; Electrodes; GSM; Mobile communication; Resonator filters; SAW filters; Surface acoustic waves; Testing; Transmitters;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762112
