Efficient Computation of the Far Field Radiated by an Arbitrary Rectangular-Aperture Distribution. Computer Program Documentation

摘要

This report contains the computer documentation for calculating the far-zone electric field due to a user-prescribed electric-field distribution within a rectangular aperture. The far-field output is computed along two arbitrarily selected, perpendicular, spatial-frequency plane cuts. Program execution time is minimized by the use of fast Fourier transform (FFT) processing. The program was designed so that the required far-field output is obtained by processing only two, vector, one-dimensional FFTs. The far-field results are obtained in the form of elevation and azimuth vector components and electric-field-vector magnitude. A complete analytical discussion of the problem is presented, along with sample graphical output to illustrate how aliasing and output resolution limitations effect the graphical results.