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

fYear

2009

fDate

2-4 March 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IWAT.2009.4906925

Filename

4906925