Numerical/Electromagnetics Code (NEC)
Abstract
A hybrid numerical electrodynamics code (NEC) code which uses an Electric Field Integral Equation (EFIE) to model wirelike objects and a Magnet Field Integral Equation (EFIE) to model wirelike objects and a Magnetic Field Integral Equation (MFIE) to model surfacelike objects with time harmonic excitation is discussed. A threeterm sinusoidal spline basis is employed for the wire current while a pulse basis is used for the surface current, with deltafunction weights employed everywhere. Provision is made for connection of wires to surfaces via an attachment, or interpolation, basis. NEC includes a number of features for efficient modeling of antennas and scatterers in their environments. The most recent addition, in the version NEC3, was the capability of modeling wires that are buried or penetrate the groundair interface. The current status of NEC3 and plans for Future NEC are discussed. Some typical results are included.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 November 1984
 Bibcode:
 1984STIN...8522874B
 Keywords:

 Computer Programs;
 Electromagnetic Radiation;
 Power Lines;
 Antennas;
 Computation;
 Integral Equations;
 Mathematical Models;
 Communications and Radar