Frequency and Pattern Reconfigurable Antenna for WLAN and WiMAX Application

摘要

An innovative bow tie frequency and pattern reconfigurable antenna is proposed in this paper which can be used for WLAN and WiMAX applications. The proposed antenna is a modified bow tie antenna with an additional branch on patch side. Two p-i-n junction (PIN) diodes are used for obtaining the required frequency and radiation pattern. One diode is placed on the patch side and another diode is placed on the ground side. The antenna operates at three different frequency values 3.35, 3.6 and 5.2 GHz with changing radiation patterns for each operating frequency. During simulation maximum efficiency of 80% along with a maximum gain of 1.2 dBi is obtained for on switch condition and an efficiency of 91% and gain of 2.1 dBi is obtained for off switch condition.