Characteristic mode analysis of microstrip patch shapes

The Theory of Characteristic Modes provides physical insight to the radiating nature of microstrip patch antennas and hence reduces the design optimization time. In this research, the resonant behavior of different patch shapes are analyzed using this theory. The modal analysis concludes that the parallelogram and elliptical patch shapes are more resonant than other patch shapes with the same surface area and hence are good candidates for realizing ultra-wideband microstrip patch antennas.