A low-profile broadband RFID tag antenna for metallic objects

Author

Lai, MingYin ; Li, RongLin

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

fYear

2010

fDate

8-11 May 2010

Firstpage

1891

Lastpage

1893

Abstract

A novel low-profile broadband UHF RFID tag antenna mountable on metallic plate is proposed. By adding a T-shaped microstrip line reactive loading to the radiating patch, an additional resonant mode is excited; hence the bandwidth can be greatly enhanced. The proposed antenna has a half-power bandwidth of 138 MHz (15.3%) in free space and 131 MHz (14.5%) while mounted on a metal plate, both of which entirely cover all UHF RFID bands (840-960 MHz). The proposed antenna can be easily fabricated at low cost by etching a thin inexpensive FR4 substrate.

Keywords

UHF antennas; broadband antennas; microstrip antennas; microstrip lines; radiofrequency identification; T-shaped microstrip line reactive loading; bandwidth 131 MHz; bandwidth 138 MHz; half-power bandwidth; low-profile broadband UHF RFID tag antenna; metallic objects; metallic plate; radiating patch antenna; resonant mode excitation; thin inexpensive FR4 substrate etching; Bandwidth; Broadband antennas; Etching; Microstrip antennas; RFID tags; Radiofrequency identification; Resonance; Resonant frequency; Space technology; UHF antennas; RFID tag antenna; broadband; metallic objects;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on

Conference_Location

Chengdu

Print_ISBN

978-1-4244-5705-2

Type

conf

DOI

10.1109/ICMMT.2010.5524890

Filename

5524890