Circularly Polarized Array Antenna with Emphasis on the Reduction of RCS by Utilizing Semi-Fractal Elements

In this paper, a unique broadband circularly polarized (CP) array antenna by modified feed network is presented. Employing wide band CP semi-fractal aperture coupled structure causes the creation of innovation at CP antenna array with emphasis on reducing of radar cross section (RCS). The 3 dB axial-ratio of the array extends to approximately 1.23 GHz with an impedance bandwidth of 24.77%. An acceptable agreement between the simulation and measured results validates the proposed design.