Antennas are a foundational component of our global communication and information systems. Cell phones, Wi-Fi networks, and satellite links couldn’t exist without them. LLNL scientists, Gerald Burke, Andrew Poggio, and Edward Miller created the Numerical Electromagnetic Code (NEC), an antenna modeling system for wire and surface antennas. As computer capability to handle heavy calculations increases, new versions of the code have been released.  NEC has been the most licensed technology in LLNL’s software portfolio, and the most widely used code for analyzing antenna performance. NEC v5.0 is the latest version of LLNL’s decades-long successful NEC antenna modeling software family.

NEC v5.0 models the electromagnetic response of antennas and scatters consisting of wires and conducting surfaces. Input commands can generate a number of wire and surface shapes that can be combined for complex models. Excitation can be voltage or current sources or incident plane waves. Models can be above or buried in a homogeneous ground and can include impedance loads, networks and transmission lines. Output can include model currents, radiation patterns and near E and H fields.

For a more detailed comparison of NEC-4 and NEC-5 please review the NEC 5 Validation Manual.

LLNL is offering End User License Agreements to NEC v5.0 (Windows executable version).




Individual: $110
U.S. Academic: $400
Non-U.S. Academic: $600
U.S. Small Business: $1,200
Other U.S. Entity: $1,700
Other Non-U.S. Entity: $2,400
U.S. Federal Government User: Free (contact for licensing info)

End User License
Licensing Instructions




LLNL continues to provide NEC 4.2 by request. NEC 4.2 end user license and Licensing Instructions.
For more information please contact
Reference Number