Near-Zone Field Strength of Aperture Antenna

A approximation algorithm of aperture integration and geometrical theory of diffraction be used to calculate the near-field power densities of aperture antenna described in this paper. And an example will be provided to illustrate how to use the method in the actual engineering. The new method can permit more rapid and efficient calculations than previous aperture integration techniques. The method can be applied to analyze the radiation near-fields of aperture antennas and electromagnetic compatibility.