Title :
Miniaturized SAW devices for radio communication transceivers
Author :
Hikita, Mitsutaka ; Tabuchi, Toyoji ; Sumioka, Atsushi
Author_Institution :
Hitachi Ltd., Tokyo, Japan
fDate :
2/1/1989 12:00:00 AM
Abstract :
Various applications of surface-acoustic-wave (SAW) technologies are investigated in which the use of SAW devices would result in reduced volume and weight for VHF/UHF radio communication transceivers. Attention is given to improved insertion loss and power requirements reported for SAW filters. In particular, by analyzing the loss mechanisms of a previously developed high-performance SAW filter for mobile telephones, a new extremely low-loss SAW filter (loss of as low as 1.2-2.0 dB at 600 MHz) has been developed. The results of fundamental experiments for a SAW antenna duplexer using this new SAW filter as the transmitter filter with a semicoaxial filter as the receiver filter at 800 MHz are presented
Keywords :
antenna accessories; mobile radio systems; surface acoustic wave filters; transceivers; 1.2 to 2 dB; 600 MHz; 800 MHz; SAW antenna duplexer; SAW filters; UHF; VHF; insertion loss; miniature devices; mobile radio; power requirements; radio communication transceivers; receiver filter; semicoaxial filter; surface acoustic wave devices; transmitter filter; Insertion loss; Radio communication; Radio transmitters; Receiving antennas; SAW filters; Surface acoustic wave devices; Surface acoustic waves; Telephony; Transceivers; Transmitting antennas;
Journal_Title :
Vehicular Technology, IEEE Transactions on
