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Abstract
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<P>The Numerical Electromagnetics code (NEC-2) is a computer code for analyzing
the electromagnetic response of an arbitrary structure consisting of wires and
surfaces in free space or over a ground plane. The analysis is accomplished by
the numerical solution of integral equations for induced currents. The
excitation may be an incident plane wave or a voltage source on a wire, while
the output may include current and charge density, electric or magnetic field
in the vicinity of the structure, and radiated fields. NEC-2 includes several
features not contained in NEC-1, including an accurate method for modeling
grounds, based on the Summerfield integrals, and an option to modify a
structure without repeating the complete solution. </P>
<P>This manual contains instruction for use of the Code, including preparation
of input data and interpretation of the output. examples are included that show
typical input and output and illustrate many of the special options available
in NEC-2, covering the equations and details of the coding, are referenced.</P>
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