Fa. Alhargan et Sr. Judah, A GENERAL MODE THEORY FOR THE ELLIPTIC DISK MICROSTRIP ANTENNA, IEEE transactions on antennas and propagation, 43(6), 1995, pp. 560-568
Full analytical expressions for the input impedance and radiation fiel
ds of the elliptic patch antenna are developed using the cavity model
Green's function, where the double series Green's function of the elli
ptic disk is reported for the first time. These expressions can handle
any mode of operation and eccentricity of the elliptic disk. The perf
ormance of the elliptic patch antenna is then investigated as a functi
on of eccentricity, focal length and feed position. The resulting theo
retical predictions show good agreement with experiment.