Resonant Frequency Optimization of Cylindrical Liquid Antenna Using Particle Swarm Optimization Algorithm

Abstract

In recent years liquid antennas have evolved as a favourable option for several use. In this paper we have tried to present a optimized cylindrical liquid antenna using Particle Swarm Optimization (PSO) algorithm and the simulation of the said antenna was done using CST. Investigation shows that generated electric field line changes the effective radius of cylinder which in turn changes the resonant frequency. So good optimization technique for proper calculation of parameters was required which will consider both the electric field line effect and designed resonant frequency. In this paper only resonant frequency is optimized and PSO has been used to calculate radius (w) and height (L) of the liquid in order to get desired result. Experiment was carried out at different frequencies by varying the parameters such as the inner radius of the cylinder, height of the liquid, and the dielectric.