Comparison of currents on upper and lower sides of patch conductor of microstrip antenna

The electric currents on the upper and lower sides of the patch conductor are derived by spectral domain-method of moment (SD-MoM) with considerations of the thickness of the patch conductor. Thus, integral equations are derived from the boundary condition that the total tangential electric field vanishes on the upper and lower sides of patch conductor. In order to clarify the effect of the currents on the upper and lower sides of the patch to the antenna, the input impedances due to those currents are calculated.IEEE Antennas and Propagation Society, International Symposium : 2002 , June 16-21, 2002, San Antonio, Texas, held in conjunction with USNC/URSI National Radio Science Meetin