Far-Zone Electric Fields Radiated by A Coaxial Cable Through An Aperature In A Perfectly Conducting Ground Plane

무한도체 평면상에 놓여있는 동축 케이블의 개구면을 통하여 복사되는 원거리 전계

Far-zone electric fields radiated by a coaxial cable through an aperture in a perfectly conducting ground plane are calculated utilizing the dyadic Green's function and vector wave functions. In this paper the outer radius $\alpha$ is assumed to be less than 0.02 so that the aperture fields is well approximated by the dominant TEM mode in the coaxial cable. The result of present approach is compared with the readily obtained solution. The present solution is valid outside of the spherical regions with radius `$\alpha$' from the center of coaxial cable.