Simulation results of spherical and conical antennas when placed over lake in Gauribidanur observatory

Abstract

It is in general known that medium surrounding the antenna if less lossy, the antenna would tend to have more radiation efficiency. In view of this, having water below the antenna is thought to improve the efficiency of a real-earth based antenna. The present report presents the simulation results obtained when antenna is placed over fresh water surface. They results show the effect of water on the return loss and radiation efficiency of spherical and conical monopole antennas in the frequency ranges 50-200 MHz. Simulation has been carried out using WIPL-D electromagnetic simulation software.