Single Layer Reflectarray Antenna for High Frequency Applications

A single layer fence shaped high gain reflectarray antenna has been designed for Ku band Applications. The desired phase range is obtained nearly equal to 500° by varying the length of five vertical rods. The designed reflectarray consists of 441 elements of different sizes and it is illuminated by a horn antenna. The size of the element is 0.451λ
0
. For the proposed reflectarray antenna the gain observed is greater than 20 dBi across the whole Ku band (12 GHz to 18 GHz), however the peak gain of 26.31 dBi is obtained at 13.5 GHz. The designed antenna achieves a 1 dB gain bandwidth of 15.4%. It is found that the side lobe and beamwidth at 13.5 GHz are below -18 dB and 6°, respectively. The attained cross polarization values are below -20 dB at E plane and lesser than -25 dB at H plane. The designed reflectarray antenna is appropriate for high gain application like satellite communications.