PIER Letters
 
Progress In Electromagnetics Research Letters
ISSN: 1937-6480
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BROADBAND CPW-FED CIRCULARLY POLARIZED ANTENNA WITH AN IRREGULAR SLOT FOR 2.45 GHZ RFID READER

By L. Chen, X. Ren, Y.-Z. Yin, and Z. Wang

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Abstract:
A coplanar waveguide-fed slot antenna with wideband circular polarization characteristic is presented. The proposed antenna consists of an irregular slot with a stair-shaped edge and an L-shaped feed line. The stair-shaped edge can improve the circular polarization of the antenna. The simulated and measured results show that the antenna has an impedance bandwidth (VSWR < 2) about 1040 MHz (42%@2.47 GHz) and an axial ratio (AR) bandwidth (AR < 3 dB) about 640 MHz (25.8%@2.48 GHz) for 2.45 GHz RFID applications. The RHCP gain in the main radiation direction varies between 2.3 dBi and 3.8 dBi.

Citation:
L. Chen, X. Ren, Y.-Z. Yin, and Z. Wang, "Broadband CPW-Fed Circularly Polarized Antenna with an Irregular Slot for 2.45 GHz RFID Reader," Progress In Electromagnetics Research Letters, Vol. 41, 77-86, 2013.
doi:10.2528/PIERL13052020

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