Analysis of Conical Horn Antenna Radiation over Ground by Directional Currents Method

Directional Currents Method, which was developed and tested for rectangular horn antennas recently by Polat and Daşbaşı, is applied to derive explicit radiation fields of a conical horn antenna located over a simple lossy dielectric half-space. The influence of presence of transmission medium on E- and H-plane radiation performances of the conical horn is displayed under dominant mode excitation in comparison with similar results for a pyramidal horn in X-band. The accuracy of the radiation fields when the conical horn is located close to air-ocean interface is checked by comparing with the full wave simulation data of the commercial software CST
^TM
.