FORTRAN SUBROUTINES FOR THE NUMERICAL EVALUATION OF SOMMERFELD INTEGRALS UNTER ANDEREM

摘要

A description is given of the subroutine package added to the computer program WF-LLL2A to extend its capabilities to include solving for the currents on thin wire structures when the structures interact strongly with a lossy ground. This includes not only the case of a structure located above the ground, but also buried beneath it and with portions above and below the ground. The routines solve for the mutual impedance between two segments of the structure by the use of approximate formulas due to Norton (when appropriate) or, when necessary, by the evaluation of Sommerfeld integrals through numerical contour integration.