Title :
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
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 ¿ 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.
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;
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
DOI :
10.1109/APMC.2009.5384359
