Title :
Design of a 2.45 GHz passive transponder using printed dipole rectenna for RFID application
Author :
Na, Young-Soo ; Kim, Jin-Sub ; Kang, Yong-Chul ; Byeon, Sang-Gi ; Rha, Kuk-Hwan
Author_Institution :
Sch. of Electron., Kwangwoon Univ., Seoul, South Korea
Abstract :
In this paper, we designed a passive RFID transponder at 2.45 GHz. The printed dipole antenna with wider bandwidth than that of the conventional patch antenna is suggested. The slot of the printed dipole could find accurate matching point and improve the antenna gain. According to the measured results, the gain of the antenna was 2.38 dBi and the conversion efficiency of the detector was 40.3% at the load resistance of 3.2 kΩ. The transmitted power from the reader is 500 mW (27 dBm) and the gain of the reader antenna is 14.57 dBi. The received power was 1.51 mW (2.2 V, 687 μA) at the distance of 1.5 m from the reader. Also we suggest an ASK modulation method using a bipolar transistor to compensate the disadvantage of the conventional PIN diode, which needs large current.
Keywords :
UHF antennas; dipole antennas; microstrip antennas; modulation; radiofrequency identification; transponders; 1.5 m; 1.51 mW; 2.2 V; 2.45 GHz; 3.2 kohm; 40.3 percent; 500 mW; 687 muA; ASK modulation method; PIN diode; RFID application; antenna gain; bipolar transistor; passive transponder; printed dipole antenna; printed dipole rectenna; reader antenna; rectifying antenna; Antenna measurements; Bandwidth; Dipole antennas; Electrical resistance measurement; Passive RFID tags; Patch antennas; Radiofrequency identification; Rectennas; Slot antennas; Transponders;
Conference_Titel :
TENCON 2004. 2004 IEEE Region 10 Conference
Print_ISBN :
0-7803-8560-8
DOI :
10.1109/TENCON.2004.1414829
