Microstrip Rectangular Patch Antenna for S and X band applications

A Rectangular Microstrip Patch Antenna (RMPA) with circular slot applicable for S band and X band applications is presented in this paper. Comparative observations are noted for different feed positions and slotted structures of proposed antenna with conventional RMPA. Rogers RT/Duroid material with 2.2 dielectric constant is used for substrate. Simulation results shows the frequency shift towards lower side for slotted structures and improved parameters such as return loss, gain, VSWR and radiation pattern as compare to simple RMPA. Coaxial probe feed is used to provide the excitation to simulate the antenna structures. Miniaturized structure antennas for growing wireless communication system are required with high gain and good impedance matching performance. So with this proposed geometry size of conventional antenna is reduced to 48%. This is called as miniaturization of conventional antenna. The proposed antenna is designed and simulated using high frequency structural simulator (HFSS).