Title :
Compact circularly polarized microstrip antenna for RFID handheld reader applications
Author :
Nasimuddin ; Qing, Xianming ; Chen, Zhi Ning
Author_Institution :
RF & Opt. Dept., Inst. for Infocomm Res., Singapore, Singapore
Abstract :
A compact circularly polarized microstrip antenna (CPMA) with slits is proposed for radio frequency identification (RFID) handheld reader applications. The slits are cut onto the square patch radiator diagonally to reduce antenna size with circular polarization (CP) operation. A measured 3-dB axial-ratio (AR) bandwidth of around 4.0 MHz with 19.0 MHz impedance bandwidth at centre frequency of 920 MHz is achieved. The overall antenna size is 0.276¿o × 0.276¿o × 0.014¿o. The proposed antenna can be a good candidate for RFID portable or handheld reader applications.
Keywords :
microstrip antennas; polarisation; radiofrequency identification; CPMA; RFID handheld reader; antenna size reduction; bandwidth 19.0 MHz; bandwidth 4.0 MHz; circular polarization operation; compact circularly polarized microstrip antenna; frequency 920 MHz; gain 3 dB; radio frequency identification; square patch radiator; Antenna measurements; Bandwidth; Frequency measurement; Impedance measurement; Microstrip antennas; Optical polarization; Poles and towers; Radio frequency; Radiofrequency identification; UHF antennas; Circular polarization; RFID; microstrip antenna; reader antenna; slits;
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.2009.5385294
