TABLE OF CONTENTS Hiroyuki Ohmine
This chapter presents antennas for Intelligent Transportation Systems (ITS), especially a 5.8-GHz active system of dedicated short range communication (DSRC), which is the key to the development of ITS. A special design method that illuminates a specified area on a lane at a tollgate and its design applications are described. Additional field strengths, including reflections and diffractions from some obstacles, are also indicated for the use of practical application. Some advanced topics, such as applications of DSRC of a nonstop parking access control system, bun location system, and probe system, are also addressed.
Intelligent Transportation Systems have been developed as a solution for various traffic problems, including accidents, traffic jams, and exhaust emissions by the introduction of electronics and communication and information systems, and various research and development work has been promoted in many countries of the world. Through the abrupt progress of information and communication technology (ICT), vehicles are also equipped with ICT.
In Japan, the total accumulated number of car navigation units has exceeded 26 million as of the the time of this writing. Among these, 18 million units have been equipped with the Vehicle Information and Communication System (VICS). Further, the number of on-board equipment for electronic toll collection (ETC) in the market had exceeded 19 million units by September 2007. A 5.8-GHz active system of dedicated short range communication is treated as the key to the deployment of ITS and has been introduced for ETC as the primary technology. This DSRC can...
