CPW-Fed Wideband Circular Polarized Antenna for UHF RFID Applications

الملخص EN

We propose a wide bandwidth antenna with a circular polarization for universal Ultra High Frequency (UHF) radio-frequency identification (RFID) reader applications.

To achieve a wide 3 dB axial ratio (AR) bandwidth, three T-shaped microstrip lines are inserted into the ground plane.

The measured impedance bandwidth of the proposed antenna is 480 MHz and extends from 660 to 1080 MHz, and the 3 dB AR bandwidth is 350 MHz and extends from 800 to 1155 MHz.

The radiation pattern is a bidirectional pattern with a maximum antenna gain of 3.67 dBi.

The overall size of the proposed antenna is 114 × 114 × 0.8 mm3.