A novel design approach and simulation of frequency reconfigurable micro strip patch antenna for Wi-Fi, WLAN and GPS applications

This paper describes the design and performance of a novel frequency reconfigured micro strip patch antenna structure made of three different antennas which are optimized theoretically for various wireless applications. The three antennas being integrated in a proposed structure is operating at various resonant frequencies, 2.45GHz (Wi-Fi, Bluetooth), 5.5GHz (Cellular phones, WLAN, Wi-Max) and 7.5GHz (GPS, Marine Radar) respectively. They are rectangular in shape, in which RF power is fed directly to the centre radiating patch with the help of micro strip line feed technique (giving linear polarization). Various parameters such as Return Loss, Radiation Pattern, Bandwidth, Gain, VSWR, etc., are determined. The optimized performance of the proposed reconfigured antenna structure (integrated) and non reconfigured antenna structures (separately) were optimized based on Return Loss with respect to change in the thickness of the substrates used. Finally, the proposed antenna structure is fabricated and being tested. The ideal RF switches i.e., Micro strip lines were used instead of MEMS switches for antenna reconfigurability. The optimized antenna design and results are presented by using ANSOFT HFSS.)