Title :
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
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;
Conference_Titel :
Microwave and Millimeter Wave Technology (ICMMT), 2010 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-5705-2
DOI :
10.1109/ICMMT.2010.5524890
