Helical reflector antenna with a wideband CP for RFID reader

Author

Kim, Dong-Zo ; Tae, Hyun-Sung ; Oh, Kyoung-Sub ; Lee, Moon-Que ; Yu, Jong-Won

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

1032

Lastpage

1035

Abstract

A novel helical reflector antenna is presented to cover the whole UHF RFID band (860~960 MHz). The proposed antenna has a ground reflector and is composed of two antenna layers which are connected by via to form a helical structure. The total length of the proposed antenna is 1~1.3 Â¿ to have the higher antenna impedance. And the antenna gain is increased by using a ground reflector. The size of the proposed antenna is 200 Ã— 200 Ã— 35 mm³ similar to commercial RFID patch antenna with a high gain. It satisfies -10 dB return loss and 3 dB axial ratio in the RFID band. The measured antenna gain is approximately 6.5~9 dBic.

Keywords

helical antennas; microstrip antennas; radiofrequency identification; reflector antennas; RFID reader; antenna impedance; bandwidth 860 MHz to 960 MHz; gain 6.5 dB to 9 dB; ground reflector; helical antenna; loss -10 dB; patch antenna; radiofrequency identification; reflector antenna; Bandwidth; Broadband antennas; Geometry; Helical antennas; Impedance; Patch antennas; Polarization; Radio spectrum management; Radiofrequency identification; Reflector antennas; RFID reader antenna; circular polarization; helical antenna; reflector antenna; wide bandwidth;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009. APMC 2009. Asia Pacific

Conference_Location

Singapore

Print_ISBN

978-1-4244-2801-4

Electronic_ISBN

978-1-4244-2802-1

Type

conf

DOI

10.1109/APMC.2009.5384359

Filename

5384359