Title :
New SAW antenna duplexers for single- and dual-band handy phones used in 800-MHz and 1.8-GHz cellular-radio systems
Author :
Hikita, Masayuki ; Matsuura, Nobuyoshi ; Shibagaki, N. ; Sakiyama, Kazuo
Author_Institution :
Central Res. Lab., Hitachi Ltd., Tokyo, Japan
Abstract :
New SAW antenna duplexers used in EGSM/PCN dual-band handy phones have been developed. The differences between the single- and dual-band RF-circuit configurations are taken into considerations. Direct-parallel connection between the receiver SAW filter and the transmitter diode switch makes it possible to reduce the number of circuit elements and to achieve a small module size. The required frequency characteristics were also achieved.
Keywords :
cellular radio; mobile antennas; multifrequency antennas; surface acoustic wave filters; telephone sets; 1.8 GHz; 800 MHz; EGSM; PCN; RF circuit; SAW antenna duplexer; SAW filter; cellular radio system; dual-band handy phone; single-band handy phone; Bandwidth; Diodes; Dual band; Frequency; Land mobile radio cellular systems; Personal communication networks; Radio transmitters; SAW filters; Surface acoustic waves; Switches;
Conference_Titel :
Ultrasonics Symposium, 1999. Proceedings. 1999 IEEE
Conference_Location :
Caesars Tahoe, NV
Print_ISBN :
0-7803-5722-1
DOI :
10.1109/ULTSYM.1999.849425
