Wideband double-UT RFID tag antenna design

Author

Tan, Juanjuan ; Li, Xiuping

Author_Institution

Sch. of Electron. Eng., Beijing Univ. of Posts & Telecommun., Beijing

fYear

2008

fDate

Nov. 30 2008-Dec. 3 2008

Firstpage

1256

Lastpage

1259

Abstract

A new double-UT tag antenna in UHF band is proposed by adding a double-U patch to a double-T antenna in order to obtain wideband performance. The original double-T antenna presents 80 MHz bandwidth under the condition of voltage standing wave ratio less than 2 (VSWR<2). Meanwhile, the new antenna shows bandwidth of 102 MHz (VSWR<2), with dimension of 89.2 mm times 29.0 mm, 1.93 dBi gain and 84deg half-power beamwidth (HPBW). The equivalent circuit is presented to explain the working principle of the double-UT tag antenna. The equivalent circuit model results and the Electromagnetic ( EM ) simulated results agree well. By tuning the double-T matching network, the new type antenna can be matched to different RFID chips.

Keywords

UHF antennas; broadband antennas; equivalent circuits; impedance matching; microstrip antennas; radiofrequency identification; UHF band; bandwidth 102 MHz; bandwidth 80 MHz; double-T antenna; double-T matching network; double-U patch antenna; electromagnetic simulation; equivalent circuit; half-power beamwidth; impedance matching; size 29.0 mm; size 89.2 mm; voltage standing wave ratio; wideband double-UT RFID tag antenna design; Bandwidth; Broadband antennas; Circuit optimization; Circuit simulation; Electromagnetic modeling; Equivalent circuits; RFID tags; Radiofrequency identification; UHF antennas; Voltage; double-T antenna; double-U patch; double-UT antenna; impedance matching;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2008. APCCAS 2008. IEEE Asia Pacific Conference on

Conference_Location

Macao

Print_ISBN

978-1-4244-2341-5

Electronic_ISBN

978-1-4244-2342-2

Type

conf

DOI

10.1109/APCCAS.2008.4746255

Filename

4746255