Title :
An advanced 2.45 GHz radio communication system for automatic passenger gates
Author :
Konno, Ken-ichi ; Haga, Toshiyuki ; Kojima, Takayo
Author_Institution :
Antenna Giken Co. Ltd., Ohmiya, Japan
Abstract :
A 2.45 GHz wireless card system for automatic passenger gates in train stations has already been reported [1]. The system uses three key technologies: a small-size dual port slot antenna for the wireless card, a modulation/demodulation scheme that facilitates stable data transmission between the transmitter and the card, and a co-channel allocation system with phase-locked transmitters for effective utilization of frequency resources in multiple gate operation. This paper describes an advanced version of the wireless card system that uses a circularly polarized shaped-beam three-patch antenna to realize a wider communication area between the transmitter and the moving card, and a non-phase locked co-channel allocation system for simpler construction of a multiple gate system
Keywords :
data communication; demodulation; microstrip antennas; radio applications; radio equipment; rail traffic; 2.45 GHz; UHF; automatic passenger gates; circularly polarized shaped-beam antenna; co-channel allocation system; data transmission; dual port slot antenna; frequency resources; modulation/demodulation; multiple gate operation; patch antenna; phase-locked transmitters; radio communication system; transmitter; wireless card system; Data communication; Demodulation; Phase modulation; Polarization; Radio communication; Radio spectrum management; Radio transmitters; Resource management; Slot antennas; Transmitting antennas;
Conference_Titel :
Vehicular Technology Conference, 1994 IEEE 44th
Conference_Location :
Stockholm
Print_ISBN :
0-7803-1927-3
DOI :
10.1109/VETEC.1994.345321
