A novel frequency reconfigurable rectangular step slotted antenna for WLAN/ITU

Abstract

In this article, we have proposed a novel rectangular microstrip slot antenna with frequency reconfigurable characteristics for wireless applications. With the aid of two switches the reconfigurable characteristic of antenna is achieved thus enabling it to work in multiple modes. By making these switches ON and OFF, the antenna's frequency of operation can be varied. The antenna has a single band at 2.4GHz (WLAN) with a −10dB return loss bandwidth ranging from 2.3GHz to 2.5GHz when both the switches are ON. Antenna has triple bands at 2.4GHz, 5.2GHz (WLAN) and 7.8GHz (ITU) with −10dB return loss bandwidths ranging from 2.3GHz–2.6GHz, 5.1GHz–5.3GHz and 7.7GHz–7.9GHz respectively when both the switches are OFF. Antenna has dual mode of operations when either of the switch is ON. The proposed antenna has VSWR < 2 and good gain for designed bands. Both the simulated and measured results are in close agreement.