Resonant Frequency Optimization of L-Shaped Feed Cylindrical Liquid Antenna using Genetic Algorithm

Liquid antennas have attracted increasing attention in recent years and have been promising alternatives to traditional antennas for many applications mainly due to their reconfigurability. In this paper we have made an attempt to present a optimized L-shaped feed cylindrical liquid antenna using Genetic algorithm and the simulation of the above mentioned antenna was done using CST. Investigations shows that generated electric field line changes the effective radius of cylinder which in turn changes the resonant frequency. That is why good optimization technique for proper calculation of parameters is required which will consider both the electric field line effect and designed resonant frequency. In this paper the resonant frequency is optimized and Genetic Algorithm has been used to calculate radius(w) and height(L) of the liquid in order to get desired result. Experiment was carried out at variable frequencies by varying the parameters such as the inner radius of the cylinder, height of the liquid, and the dielectric.