Title :
A novel card-type transponder designed using retrodirective antenna array
Author :
Shyh-Jong Chung ; Ten-Chi Chou ; Yung-Nein Chin
Author_Institution :
Dept. of Commun. Eng., Nat. Chiao Tung Univ., Hsinchu, Taiwan
Abstract :
A novel card-type 5.8 GHz passive transponder is designed for possible use in the Dedicated Short-Range Communication (DSRC) systems and/or the RF/ID systems. Four LHCP microstrip antennas are arranged in the transponder by using the Van Atta retrodirective design so that the transponder possesses the advantages of both a high responding signal level and a wide range of responding angles. Measurement results show that the present transponder produces a signal level 12 dB higher than a transponder with single-antenna design, while maintaining the same range of the responding angles as the single-antenna one. Finally, by incorporating 8-bit test codes in the beacon (or interrogator) and in the transponder, the downlink and uplink performances of the transponder are demonstrated.
Keywords :
amplitude shift keying; automated highways; helical antennas; low-power electronics; microstrip antenna arrays; transponders; 5.8 GHz; 8 bit; LHCP microstrip antennas; Van Atta retrodirective design; card-type transponder; dedicated short-range communication systems; downlink performance; interrogator; passive transponder; responding angles; responding signal level; retrodirective antenna array; single-antenna design; test codes; uplink performance; Antenna arrays; Circuits; Joining processes; Microstrip antenna arrays; Microstrip antennas; Microwave communication; Receiving antennas; Signal design; Switches; Transponders;
Conference_Titel :
Microwave Symposium Digest, 2001 IEEE MTT-S International
Conference_Location :
Phoenix, AZ, USA
Print_ISBN :
0-7803-6538-0
DOI :
10.1109/MWSYM.2001.967089
