Influence of the Patch Antenna Feeding on their Parameters

Patch antennas are highly used in the last few years in domains like spaceships, satellites and missiles, cellular phones, radars, GSM, wide area computer networks and also wireless local areas. This is the result of their advantages, namely the small dimensions and weight, their low cost, ease of use, ease of integration in other circuits and capability to operate at 2 or 3 frequency values. Their disadvantages, among which low efficiency, high quality factor and a narrow bandwidth must be improved. In order to do so, we must previously study the influence of different parameters on their functioning. In this paper, three different feeding types will be implemented on patch antennas and the resulting parameters will be compared and analyzed. Also, different operating frequencies will be taken into account in order to determine the dimensions of such an antenna. Considering the Rogers RT Duroid 5880 dielectric and its standard thicknesses patch antennas will also be modeled and parameters like S parameters, the bandwidth, directivity, gain will be analyzed.