Design and Analysis of Multi Band antenna for S and C Band

In this paper a rectangular Microstrip Patch multiband antenna has been designed. The parameters of the micro strip patch antenna have been optimized to obtain the multi band characteristics at 2.379 GHz, 2.45 GHz, 3.75 GHz, 4.46 GHz, 5 GHz and 6.25 GHz. All the six frequencies can cater to wireless networking applications. The frequencies between 2 GHz - 4 GHz fall in the S Band of the Radar Frequency Bands according to the IEEE standards, and similarly 5 GHz and 6.25GHz fall in the C band. The designed antenna uses the inset feed line technique for feeding the patch of the antenna. The antenna has been implemented on RT Duroid as the substrate which has 2.2 as its dielectric constant. The S11 parameters obtained for all the six frequencies have been found to be below - 10 dB mark which makes the antenna compatible to various wireless applications. The four L shaped slots were cut on the surface of the patch to increase the surface current of the patch of the antenna thereby increasing the gain of the antenna as well. The antenna design has been simulated using the CST software. All the six frequencies obtained were found useful for various wireless applications.