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4nec2 is a completely free Nec2, Nec4 and windows based tool for creating, viewing, optimizing and checking 2D and 3D style
antenna geometry structures and generate, display and/or compare near/far-field radiation patterns for both the starting and experienced
antenna modeler.
When running frequency sweeps, linear or logarithmic style SWR, Gain, F/B-ratio and impedance line-charts are produced. With the
included Optimizer and Sweeper one is able to optimize antenna- and/or other environment-variables for Gain, resonance, SWR,
efficiency and/or F/B, F/R-ratio. With the sweeper one is able to graphically display the effect of changing one or more of these variables
for a specified range of values/frequencies.
For the starting modeler a
graphically based 3D geometry-editor is included which requires no additional NEC knowledge while still
enabling you to create and visualize and compare current-distribution, far/near-field patterns and Gain/SWR charts. More experienced
modelers can use the gradient style and/or the genetic algorithm based optimizers to improve their designs.

To download go here for lastest version

4NEC2 Webpage


are powerful but very easy-to-use programs for modeling and analyzing nearly any kind of antenna in its actual
operating environment. EZNEC plots azimuth and elevation patterns; tells you gain, feedpoint impedance, SWR, and current distribution;
finds and reports beamwidth, 3-dB pattern points, f/b ratio, takeoff angle, sidelobe characteristics; and more. All information, including
patterns, can be displayed on screen or printed on any Windows compatible printer. And it's easy to use with EZNEC's menu structure,
spreadsheet-like entry, and many shortcut features. You describe the antenna (and other nearby structures if desired) as a group of
straight conductors, choosing the orientation, length, and diameter. Add sources at the feedpoints and, if desired, transmission lines, a
realistic ground, and loads to simulate loading coils, traps, or similar components. Using this description method, you can quickly
analyze Yagis, quads, phased arrays, towers, loops -- nearly any type of antenna or parasitic structure. Antenna descriptions and pattern
plots are easily saved and recalled for future analysis. Multiple patterns can be superimposed on a single graph for comparison. See
the pattern and antenna currents on the same color 3-D display as the antenna. Rotate the antenna display and zoom in for details.
Want to make a change? EZNEC makes it simple

EZNEC Webpage for the lastest version

EZNEC Webpage


is an antenna-analyzing tool based on the moment method, which was introduced in MININEC. The program provides ability for
changing the language of signs and messages of the program.able-based editor for antenna design and definition
Graphical antenna viewer
Viewer for horizontal and vertical beam radiation patterns 
3D radiation pattern
Comparator for two or more  "calculation" results
Antenna element editor
Antenna wire editor
Tools for defining the combination of elements with different diameters
Automatic antenna optimizer with respect to jX, SWR, Gain, F/B, Elevation, and Current
Ability to browse optimized results with manual tuning capability
Frequency characteristics chart maker
Data file generator

MMANA-GAL Webpage for the last version


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