Reconfigurable Tunning Antenna for S Band Navigation Receiver Applications

The goal of the project is to design a rectangular, continuous frequency tunning reconfigurable patch antenna. Varactor diodes are used to shift the frequencies. To achieve frequency biassing, the inductance and resistance of the varactor diode are adjusted. Altering the capacitance value from 0.73 pF to 7.41 pF, the recommended antenna's tuning of frequencies and the frequency shifting at 2.45 GHz and 2.75 GHz. The frequency shifting occurs between higher capacitance 2.45GHz, mid capacitance 2.60GHz and lower capacitance 2.75GHz, The reflection coefficient (-10.5 dB), (-11.35 dB), (-27 dB) and gain (8.55 dBi). the slot of rectangular patch antenna with the frequency of 2.6Ghz, resonate the antenna offers a good reflection coefficient.