High-Gain Circularly-Polarized Elliptically-Annular Antenna-Array with Reduced Side-Lobe Level
Rabindra Kumar1, Archana Kumari2, Neha Kumari3, Priyanka Mondal4, Pradip Kumar Jain5
1Rabindra Kumar*, Department of Electronics & Communication Engg. National Institute of Technology Patna, Bihar, India.
2Archana Kumari, Department of Electronics & Communication Engg. National Institute of Technology Patna, Bihar, India.
3Neha Kumari, Department of Electronics & Communication Engg. National Institute of Technology Patna, Bihar, India.
4Priyanka Mondal, Department of Electronics & Communication Engg. National Institute of Technology Patna, Bihar, India.
5Pradip Kumar Jain, Department of Electronics & Communication Engg. National Institute of Technology Patna, Bihar, India.
Manuscript received on January 12, 2020. | Revised Manuscript received on January 22, 2020. | Manuscript published on February 10, 2020. | PP: 2319-2325 | Volume-9 Issue-4, February 2020. | Retrieval Number: D1845029420/2020©BEIESP | DOI: 10.35940/ijitee.D1845.029420
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: A single feed microstrip patch elliptically annular antenna array has been proposed for high gain circularly polarized (CP) radiation. An array of elliptically annular patches antenna resonates at a frequency of 3.77 GHz which can be used in satellite communication and radar application. A corporate feed network with quarter-wave transformer has been used for uniform excitation of all the array elements. Thus a good circular polarization is obtained by using a single feed with enhanced gain 15.62 dB compared to single patch. The radiation pattern, axial ratio and input impedance of the proposed elliptically annular antenna array is compared with single element elliptically annular antenna. A substantial gain enhancement with low side lobe level (SLL) is observed keeping circular polarization intact. Further, simulated and measured results of the proposed antenna array have been compared and found that axial ratio and gain are in good agreement.
Keywords: Planar Antenna Array, Coaxial feed, Corporate feed, Axial Ratio, Elliptical Annular Ring; Circular polarization
Scope of the Article: Smart Antenna