volume | PIER Journals

2015-12-23

Circularly Polarized Dodecagonal Patch Antenna with Polygonal Slot for RFID Applications

Karavilavadakkethil Chellappan Prakash,

Dr. Karavilavadakkethil Chellappan Prakash

Department of Electronics

Cochin University of Science and Technology

India

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Sumitha Mathew,

Dr. Sumitha Mathew

Department of Electronics

Cochin University of Science and Technology

India

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Ramachandran Anitha,

Dr. Ramachandran Anitha

Department of Electronics

Cochin University of Science and Technology

India

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Puthiyapurayil Viswanathan Vinesh,

Dr. Puthiyapurayil Viswanathan Vinesh

Department of Electronics

Cochin University of Science and Technology

India

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Methapettyparambu Jayakrishnan,

Dr. Methapettyparambu Jayakrishnan

Cochin University of Science and Technology

India

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Pezholil Mohanan,

Professor Pezholil Mohanan

Department of Electronics

Cochin University of Science & Technology

India

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Kesavath Vasudevan

Professor Kesavath Vasudevan

Department of Electronics

Cochin University of Science & Technology

India

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Progress In Electromagnetics Research C, Vol. 61, 9-15, 2016

doi:10.2528/PIERC15110301

Abstract

This paper presents a compact 2.45 GHz single feed directional circularly polarized (CP) microstrip antenna for radio frequency identification (RFID) applications. The proposed antenna comprises a dodecagonal microstrip patch embedded with an irregular polygonal slot, fabricated on an FR4 substrate. Two antennas, one with right-handed circular polarization (RHCP) and the other with left-handed circular polarization (LHCP), both resonating at a frequency of 2.45 GHz are presented. The measurement results show a 3 dB axial ratio bandwidth of 5.5%, a 10 dB impedance bandwidth of 5.7% for both the antennas, a peak gain of 4.82 dBi for RHCP antenna and 4.67 dBi for LHCP antenna. In addition, the antennas provide symmetrical patterns with 88˚ half-power beam width. The overall size of the antenna is 50 mm × 50 mm × 1.6 mm and offers an area reduction of 21.17%.

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Karavilavadakkethil Chellappan Prakash, Sumitha Mathew, Ramachandran Anitha, Puthiyapurayil Viswanathan Vinesh, Methapettyparambu Jayakrishnan, Pezholil Mohanan, and Kesavath Vasudevan, "Circularly Polarized Dodecagonal Patch Antenna with Polygonal Slot for RFID Applications," Progress In Electromagnetics Research C, Vol. 61, 9-15, 2016.
doi:10.2528/PIERC15110301

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