Title :
A compact circularly polarized slotted-slit-microstrip patch antenna
Author :
Nasimuddin ; Chen, Zhi Ning ; Qing, Xianming
Author_Institution :
Inst. for Infocomm Res., Singapore, Singapore
Abstract :
A compact slotted-slit-microstrip patch antenna is studied for circular polarized (CP) radiation. Two unequal circular-shaped slots along one of the diagonal axes and four slits along the orthogonal axes are cut on the square patch radiator for CP radiation and compact antenna size. The antenna is designed for ultra high frequency (UHF) radio frequency identification (RFID) handheld reader applications. The measured 5.0 MHz bandwidth for 3-dB axial ratio (AR) and 12.0 MHz bandwidth for VSWR of 2.0 are achieved. The overall size of the antenna is 0.273 λ0 × 0.273 λ0 × 0.0139 λ0 at 910 MHz.
Keywords :
UHF antennas; antenna radiation patterns; microstrip antennas; radiofrequency identification; slot antennas; RFID; bandwidth 12 MHz; bandwidth 5 MHz; circular polarized radiation; circular-shaped slot; compact circularly polarized slotted-slit-microstrip patch antenna; frequency 910 MHz; handheld reader application; orthogonal axe; square patch radiator; ultra high frequency radio frequency identification; Antenna measurements; Bandwidth; Gain; Microstrip antennas; Radiofrequency identification; Slot antennas; Circular polarization; RFID; microstrip antenna; reader antenna; slits; slotted patch;
Conference_Titel :
Microwave Conference Proceedings (APMC), 2011 Asia-Pacific
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4577-2034-5
