PLANAR ANTENNA ARRAY DESIGN CONSIDERATIONS FOR RFID ELECTRONIC TOLL COLLECTION SYSTEM
Keywords:
Gateless Tax Collection, ETC- Electronic Toll Collection, RFID-Radio Frequency Identification, Toll booth, COM-Communication PortAbstract
This paper deals with the design of radio-frequency identification (RFID) reader for electronic toll collection
(ETC) systems. The ETC scheme herein considered comprises a planar antenna array as radiating element of the RFID
reader. This reader is required to be capable of alternatively illuminating three (or more) road surface portions called
coverage areas, where a transponder (tag) might be present. Coverage areas have to be well-defined in order to avoid
collision. This paper treats with the design of the RFID reader, with special emphasis on the coverage area synthesis in
the practical case of a limited size antenna array. This paper also introduces the implementation and design of an active
RFID tag based system for automatically identifying running vehicles on roads and collecting their data. The
architecture and the basic principles of design of the system are presented; including reading equipment (readers and
antennas) and active electronic tag. Finally, the effectiveness and efficiency of the system is analyzed as a whole
