Abstract: Three different types of horn antenna systems such as pyramidal horn, conical horn and flat scalar ring horn antennas are designed, compared and finally the suitable antenna is selected for the present application at L-Band and S- Band region. The designed antenna has linear polarization, small size, light weight and multi path rejection. The three different types of antennas are simulated with commercially available software known as Ansoft HFSS, detailed design procedure with dimensions is presented and performance results are discussed. The proposed antenna gives decent gain over operating range of L and S frequency bands with wide 3-dB bandwidth.

Keywords: HFSS, horn antenna, flat scalar ring, multipath rejection.