Computation of input impedance of rectangular, circular and hexagonal patch microstrip antennas in S and X-band

摘要

Matching of input impedance of an antenna with its feed network is one of the determining factor for its best performance. In this paper, we have presented improved formulae for the input impedance of three geometries namely rectangular, circular and hexagonal patch antennas. The input impedance for these geometries has been computed and plotted as a function of feed point location is S(3 GHz) and X (10 GHz) band of microwave frequency range. Some other important antenna parameters like quality factor, directivity, efficiency, gain, bandwidth, Beamwidth, radiation resistance etc, have also been computed and presented. A comparision of these antenna characteristics has also been made For two operating frequencies is S and X-band respectively.