Circularly Polarised Hexagonal Patch Antenna With Polygonal Slot for RFID Applications

Published online: Jun 22, 2016 Full Text: PDF (1.38 MiB) DOI: 10.24138/jcomss.v12i2.84
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Prakash K. C, Vinesh P. V, Vivek R, Mohammad Ameen, Vasudevan K


A compact single feed circularly polarized microstrip patch antenna for RFID applications is proposed. Antenna geometry includes a regular hexagon shaped patch with a polygonal slot embedded at the centre. The slot accounts for circular polarization and an area reduction of 22.5 %. It is fabricated on FR4 substrate with dielectric constant 4.4 and size 50 mm x 50 mm x 1.6 mm. The measured results include 10dB impedance bandwidth of 5.5 % at the center frequency of 2.42 GHz, a return loss of 32 dB, minimum axial ratio of 1.82 dB, axial ratio bandwidth of 7.5%, gain of 4.9 dBi with a broadside radiation characteristic for the RHCP antenna. These results are well in tune with the simulated results and the proposed design is suitable for RFID reader antenna applications.


circularly polarized, hexagonal patch antenna, polygonal slot, RFID
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