Design of Reconfigurable Antenna with Defected Ground Structure for Wireless Sensor Network

A reconfigurable antenna is antenna fit for dynamically varying its radiation and frequency properties in controllable and reversible manner. Reconfigurable antenna integrates an inner mechanism in order to provide a dynamic reaction.In previous research, the authors designed the reconfigurable antenna by using Defected Ground Structure (DGS). The slow-wave effect is the main advantage of DGS, however, some drawbacks occur in DGS. So this paper presentsan optimization algorithm in DGS to vary the DGS parameters and get a better frequency value. Simulation of the proposed method is achieved with the help of High-Frequency Structure Simulator and result of proposed technique is evaluated by means of return loss, Voltage Standing Wave Ratio, bandwidth, gain and radiation pattern, maximum efficiency directivity, resonant frequency, and peak gain.