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Rafii, Vahid, Nourinia, Javad, Ghobadi, Changiz, Pourahmadazar, Javad and Virdee, Bal Singh (2013) Broadband circularly polarized slot antenna array using sequentially rotated technique for C-band applications. IEEE Antennas and Wireless Propagation Letters, 12 ((2013)). pp. 128-131. ISSN 1536-1225
This paper presents the investigation results on a novel circularly polarized square slot antenna (CPSSA) array designed to operate at a frequency of 5.5 GHz. In order to realize the proposed antenna array, four miniature circular polarized square slot antennas are used with L-shape grounded strips located at the slots opposite corners. The antenna is fed by symmetric coplanar waveguide. The CPSSA element achieves a bandwidth of 18% for an axial ratio ≤ 3 dB. The CPSSA’s performance is further enhanced with the construction of a novel 2×2 antenna array that is designed using sequentially rotated feed technique. The 3 dB axial ratio of the array extends over 2 GHz with an impedance bandwidth of 33.33%. The CPSSA array was design operates over the frequency range between 4 and 6.87 GHz (52.8%) for VSWR<2 (1.71:1). Acceptable agreement between the simulation and measured results validates proposed design.
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