Numerical Electromagnetics Code

The Numerical Electromagnetics Code, or NEC, is a popular <a href="/facts/Antenna_modeling/uJKnwCar">antenna modeling</a> computer program for wire and surface <a href="/facts/Antenna_(radio)/pGlcXBvc">antennas</a>. It was originally written in <a href="/facts/FORTRAN/m1KqjcMU">FORTRAN</a> during the 1970s by Gerald Burke and Andrew Poggio of the <a href="/facts/Lawrence_Livermore_National_Laboratory/WuXIbIKz">Lawrence Livermore National Laboratory</a>. The code was made publicly available for general use and has subsequently been distributed for many computer platforms from mainframes to PCs.
NEC is widely used for modeling antenna designs, particularly for common designs like television and radio antennas, <a href="/facts/Shortwave_radio/7cIaClcB">shortwave</a> and <a href="/facts/Amateur_radio/cBsMyamV">ham radio</a>, and similar examples. Examples of practically any common antenna type can be found in NEC format on the internet. While highly adaptable, NEC has its limits, and other systems are commonly used for very large or complex antennas or special cases like microwave antennas.
By far the most common version is NEC-2, the last to be released in fully public form. There is a wide and varied market of applications that embed the NEC-2 code within frameworks to simplify or automate common tasks. Later versions, NEC-3 and NEC-4, are available after signing a license agreement. These have not been nearly as popular. Versions using the same underlying methods but based on entirely new code are also available, including MININEC.

Numerical Electromagnetics Code open-in-new

Numerical Electromagnetics Code