Antenna Modeling

Contents:
  1. NEC - Numerical Electromagnetics Code
  2. The Math - The Method of Moments
  3. Linux Based by xnec2c - A Graphical NEC2 Antenna Simulation by Neoklis 5B4AZ
  4. Windoes Based by Arie Voors - 4nec2 - Modeling and Download
  5. MMANA Modeling
  6. Coil Shortened Dipole
  7. Videos by Justin Johnson, G0KSC
  8. NEC Lab
  9. Windows Based MMANA-GAL
  10. Cebik, W4RNL Guides
  11. References

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NEC - Numerical Electromagnetics Code

EZNEC and 4nec2 are based upon the Numerical Electromagnetics Code, or NEC, which is a popular antenna modelling system for wire and surface antennas originally written in FORTRAN in the 1970s by Gerald Burke and Andrew Poggio of the Lawrence Livermore National Laboratory.

http://www.nec2.org/

wikipedia.org/wiki/Numerical_Electromagnetics_Code

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The Math - The Method of Moments

The math behind the NEC calculation involves the Method of Moments
https://en.wikipedia.org/wiki/Method_of_moments_(electromagnetics)

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Linux Based by xnec2c - A Graphical NEC2 Antenna Simulation by Neoklis 5B4AZ

xn252-5B4AZ.png

Xnec2c is an open source port of NEC2 from FORTRAN to C. It is a high-performance multi-threaded electromagnetic simulation package to model antenna near- and far-field radiation patterns for Linux and UNIX operating systems. The original FORTRAN version of NEC2 was ported to C by Neoklis Kyriazis, 5B4AZ and released as nec2c. Later he wrote xnec2c, a graphical interface for ease of use with many more features.

Xnec2c: Graphical NEC2 Antenna Simulation:
https://www.xnec2c.org/

The Xnec2c github repository - Fast Multi-Threaded EM Simulator based on NEC2:
https://github.com/KJ7LNW/xnec2c

xnec2c-optimize is a related application is an optimization framework to tune antenna geometries with xnec2c.

https://github.com/KJ7LNW/xnec2c-optimize

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Windoes Based by Arie Voors - 4nec2 - Modeling and Download

http://www.qsl.net/4nec2/

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MMANA Modeling

MANNA Download Site
http://hamsoft.ca/pages/mmana-gal.php

Youtube - MMANA Tutorial Part 1 M0MCX 20m dipoles
Youtube - MMANA Tutorial Part 2 M0MCX 20m Horizontal Loop Antennas
Youtube - MMANA Tutorial Part 3 M0MCX 40m inverted V
Youtube - MMANA Tutotial Part 4 M0MCX introducing the Mega-Loop

Antenna Design for Using MMANA-GAL Software by Terry (G4CHD)

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Coil Shortened Dipole

https://www.66pacific.com/calculators/coil-shortened-dipole-antenna-calculator.aspx

https://66pacific.com/calculators/coil-shortened-vertical-antenna-calculator.aspx

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Videos by Justin Johnson, G0KSC

How to Model Antennas with 4NEC2 Antenna Modelling software - Part 1, the basics:
https://www.youtube.com/watch?v=W2N8AeOFqaM

How to use 4NEC2 Antenna Modelling Software - Part 2
https://www.youtube.com/watch?v=nBqnSvNxS2Q&list=PLpP2PTeQkUnTooo2zk1vEux_da3uv9lKF&index=2

How to use 4NEC2 Antenna Modelling Software - Part 3
https://www.youtube.com/watch?v=zwquzrbbwlw&list=PLpP2PTeQkUnTooo2zk1vEux_da3uv9lKF&index=3

How to use 4NEC2 Antenna Modelling Software - Part 4 - mastering the editors
https://www.youtube.com/watch?v=hxwwif2hfRo&list=PLpP2PTeQkUnTooo2zk1vEux_da3uv9lKF&index=4

How to use 4NEC2 Antenna Modelling Software Part 5 - using the optimiser
https://www.youtube.com/watch?v=azoSyF9XWEk&list=PLpP2PTeQkUnTooo2zk1vEux_da3uv9lKF&index=5

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NEC Lab

NEC Lab is a tool based on the Numerical Electromagnetics Code (NEC2) that applies Artificial Intelligence (AI) to design antennas. NEC Lab takes as input a set of requirements (VSWR, gain, radiation pattern, etc.) for a specific frequency or frequency bands. NEC Lab considers, analyzes and evaluates several design options to draft an antenna. NEC Lab uses fine tuning techniques to improve this draft and create a high performance design. NEC lab will help you analyze and evaluate the resulting antenna performance.

Windows Only - Download:
https://web.archive.org/web/20170104220153/https://dl.dropboxusercontent.com/u/74744282/NecLab.msi



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Windows Based MMANA-GAL

Windows Only:
MMANA-GALis based upon MININEC which was written by John Rockway with support from Jim Logan.

MMANA-GAL is an antenna-analyzing tool based on the moment method, which was introduced in MININEC version 3. The BASIC source code of the computation engine is published as a PDS in MININEC. The program use the MININEC-3 engine modified by Alexandre Schewelew, DL1PBD, and are written in C++.

Documentation is here: http://gal-ana.de/index.htm

Download a free version here: http://gal-ana.de/basicmm/en/

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Cebik, W4RNL Guides

Cebik, W4RNL's HOme page:
http://www.antentop.org/w4rnl.001/radio.html

L. B. Cebik, W4RNL - A Beginner’s Guide to Modeling with NEC:
Part 1. http://wireless.ictp.it/school_2005/download/nec2/nec_part1.pdf
Part 2. http://wireless.ictp.it/school_2005/download/nec2/nec_part2.pdf
Part 3. http://wireless.ictp.it/school_2005/download/nec2/nec_part3.pdf
Part 4. http://wireless.ictp.it/school_2005/download/nec2/nec_part4.pdf

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References

Antennas in Linux by Joey Bernard on March 14, 2019: https://www.linuxjournal.com/content/antennas-linux



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Glenn Lyons VK4PK
glenn@LyonsComputer.com.au
Ver:gnl20182018 - pre published v0.9