Novel Design and Performance Analysis of Rectangular Frequency Reconfigurable Micro Strip Patch Antenna using Line Feed technique for Wireless Applications

Objectives: This paper deals with a new design approach for achieving reconfigurable function in Microstrip Patch Antennas. Methods/Analysis: Initially, the antennas are designed on three independent substrates for three individual resonant frequencies such as 2.45GHz (Wi-Fi, Bluetooth, and RF-ID), 5.5GHz (Wi-Fi, WLAN, and Wi-Max) and 7.5GHz (Indoor UWB wireless applications, Satellite and Marine Radar) using line feed technique for various wireless communications. And then, a new frequency reconfigurable rectangular Microstrip Patch Antenna is designed with three patches which are installed on a single substrate using the same feeding technique, where RF power is fed directly to the center patch. The integration of patches on the substrate is made possible with RF switches. Findings: The performance parameters such as return loss, bandwidth and radiation pattern of the reconfigured antenna were measured based on the RF switch on/off conditions. Applications/Improvements: Based on the return loss and bandwidth, the performances of both the reconfigurable and non-reconfigurable antenna designs are compared, tabulated and presented using ANSOFT HFSS 13.0.