Open AccessHigh-Gain Circularly-Polarized Elliptically-Annular Antenna-Array with Reduced Side-Lobe Level
Author(s) -
Rabindra Kumar,
Archana Kumari,
Neha Kumari,
Priyanka Mondal,
P. K. Jain
Publication year - 2020
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.d1845.029420
Subject(s) - elliptical polarization , optics , turnstile antenna , side lobe , physics , axial ratio , microstrip antenna , antenna array , circular polarization , array gain , collinear antenna array , radiation pattern , antenna gain , coaxial antenna , antenna (radio) , telecommunications , microstrip , linear polarization , engineering , laser
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.