Title :
Broadband matching of a RFID antenna by using a T-type circuit
Author :
Noguchi, Keisuke ; Moroya, Tetsuo ; Mizusawa, Motoo ; Betsudan, Shin-ichi ; Makino, Shigeru ; Sasaki, Takurou
Author_Institution :
Kanazawa Inst. of Technol., Nonoichi
Abstract :
RFID usage is steadily increasing in the world, and its frequency bands are assigned in each country. RFID in UHF band is mainly used in 900 MHz band. Allocated frequency bands of Europe, the USA and Japan are included from 860 to 960 MHz. Broadbanding of the IC and antenna is needed to manage the worldwide RFID frequency band. This paper proposes broadband matching of a RFID antenna by using a T-type circuit. The antenna consists of a meander-line and a T-type circuit that realizes conjugate impedance matching to the IC impedance. Equivalent circuits of the antenna are shown and evaluated by parametric study. Prototype of the antenna is realized and its numerical analyses are examined.
Keywords :
UHF antennas; UHF integrated circuits; broadband antennas; equivalent circuits; impedance matching; radiofrequency identification; Europe; IC impedance; Japan; RFID antenna; T-type circuit; UHF band; USA; broadband matching; conjugate impedance matching; equivalent circuits; frequency 860 MHz to 960 MHz; meander-line; Broadband antennas; Equivalent circuits; Europe; Frequency; Impedance matching; Numerical analysis; Parametric study; Prototypes; Radio spectrum management; Radiofrequency identification;
Conference_Titel :
Antenna Technology, 2009. iWAT 2009. IEEE International Workshop on
Conference_Location :
Santa Monica, CA
Print_ISBN :
978-1-4244-4395-6
Electronic_ISBN :
978-1-4244-4396-3
DOI :
10.1109/IWAT.2009.4906925
