Download NEC visualization, optimization and sweeping tool

When navigating between cells, the help-text box (just below the menu commands) is updated for
each new cell.
This new Nec-edit window will show you below Tab pages:
Symbols
On this page you can specify and/or modify all Symbols (variables) used in your model. At the
bottom of this page you can select between different scaling methods. Scaling does affect the
data on the Geometry page and all symbols used on this page. When ‘custom’ scaling is selected
one can enter a user specific scaling factor. Note that you may also specify symbols to be used
on the ‘Source/load’, ‘Frequency/Ground’ and other Tab-pages.
Note: when using already existing Nec input (example) files it’s possible that one or more SY
variables have been re-used (defined more than once). These (position dependent) SY variables
are mostly defined just before they are used in multiple GW, LD or EX lines. A warning message
is generated when saving such a file.
To avoid unexpected results using the new Nec-editor, these files (which have been created with
the Notepad- or old-style Nec-editor) need some slight modifications so that all used SY variables
are unique throughout the Nec input-file.
Geometry
The Geometry page does contain all data used to specify the model’s geometry structure. On the
first column (named ‘type’) you can select between the different geometry types:
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Wire, to specify a straight wire containing the specified number of segments
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copy/move, to move and/or copy one or more of the preceding geometry lines
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arbitrary shaped surface-patch, to specify an arbitrary surface with known area
Helix, to specify a helical or spiral structure built from straight line segments
Arc, to specify a circular arc built from straight line wire segments
rotate, to rotate preceding geometry lines to create a cylindrical structure
mirror, to mirror the structure in X, Y and/or Z-plane to benefit from symmetry
triangular sp, ditto for a triangular shape
rectangular sp, ditto for a rectangular shape
quadrilateral sp, ditto for a quadrilateral shape
patch continuation, to specify a string of rectangular/quadrilateral patches
multiple (rectangular) sp, to cover a rectangular region with a number of rectangular patches
To specify tapered wires, both in segment-length and/or in wire-radius, check the ‘use wire
tapering’ box. If checked, additional columns for straight wire rows will show up.
Source/Load
Using the check-boxes at the top of this page, one can specify additional antenna structure data
such as:
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Excitation sources; at least one source, mostly a voltage- or current-source, is needed to get
useful output-data