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Helical reflector antenna with a wideband CP for RFID reader

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5 Author(s)
Dong-Zo Kim ; Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea ; Hyun-Sung Tae ; Kyoung-Sub Oh ; Moon-Que Lee
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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 ¿ 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 × 200 × 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.

Published in:

Microwave Conference, 2009. APMC 2009. Asia Pacific

Date of Conference:

7-10 Dec. 2009