Reconfigurable antenna structure for wifi system application using varactor-loading technique

Abstract

A microstrip patch antenna of operating frequencies 2.45 GHz is proposed for wireless communication system application. It has a one port excited with microstip line feed mechanism. The proposed antenna consists of a single layer patch antenna with one horizontal slot designed that can be controlled via varactor switches. By adjusting the status of the switches state either ON or OFF mode in simultaneously, the radiation pattern can be varied, thus achieving the radiation reconfigurable. A comprehensive parametric study has been carried out to understand the effect of various dimensional parameters (slot and varactor switches) and to optimize the performance of the antenna. This antenna is capable to achieve return loss less than -10dB and radiation pattern is making a multi-beam when the switches are ON mode. The designed antenna has also using Taconic-TLY 5 for substrate and simulates the result of return loss (S11) using CST Microwave Studio software. The proposed antenna is very promising for various modern communication applications.