A compact circularly polarized slotted-slit-microstrip patch antenna

Author

Nasimuddin ; Chen, Zhi Ning ; Qing, Xianming

Author_Institution

Inst. for Infocomm Res., Singapore, Singapore

fYear

2011

Firstpage

582

Lastpage

585

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference Proceedings (APMC), 2011 Asia-Pacific

Conference_Location

Melbourne, VIC

Print_ISBN

978-1-4577-2034-5

Type

conf

Filename

6173817