cocoaNEC Downloads



Example NC Files

Examples.zip

Use Open NC Model... in the cocoaNEC File Menu to open the files.

The download includes the following models:
  • 6 element Yagi
  • dipole
  • ground mounted vertical
  • Gull
    A 1.5λ Vee Beam with a bend in the two legs to reduce side lobes. The W7AY Gull can also be viewed as a piecewise-linear version of the driven element of the Landstrofer-Sacher antenna.
  • Hentenna
  • LPDA
    The Log Periodic Dipole Array example by Doug, K4DSP, is an example of how recursion can be used in NC to describe self-similar antenna structures.
  • N4IS Waller
    The Waller receiving antenna example includes the use of a resistive load.
  • OCF sweep
  • optimization example
    This example shows how the length of a dipole is automatically adjusted to produce the minimum VSWR.
  • simple Yagi-Uda
  • sterba
  • Vee Beam optimization
    Another optimization example; changing the apex angle of a Vee Beam to optimize the directivity of the antenna.
  • vertical dipole phased array
    Current fed phased array of two vertical dipoles.
  • vertical with raised radials
  • W1ZR Sleeve Dipole
    NC model of the two-band W1ZR sleeve dipole, written by Bill, K1GQ, which shows how insulated wires (a windowed line) and finite wire conductivity are handled. Please note that due to the proximity of insulated wires of the windowed line, NEC-2 will yield poor accuracy compared to the output from NEC-4.

Application

cocoaNEC 3.0(212)

Change Log

3.0 ()
  • [Doc] Visit all of the pages in NC Reference for formatting, errors and outdated images.
  • [Doc] Visit all of the pages in NC Tutorial for formatting, errors and outdated images. I'm learning more sophisticated ways to format things for readability, which ultimately means I should revisit other pages.
3.0 (212)
  • Many UI cosmetic adjustments.
  • Fix: Wire Currents window did not appear when left-clicking on geometry.
  • Removed GN2 option; GN3 is always better and fast enough.
  • Always enable 3D pattern plot; fast enough on modern hardware.
  • Show polarization annotation on 2D pattern plots.
  • [Doc] Add links to embedded LLNL User Guide and Theory documents on the Using NEC 4.2 page.
  • [Doc] Updated Introduction, Manual and NEC-4. Manual/Input has TODOs, Manual/Output reorganized, all images updated, text lightly edited.
3.0 (162)
  • [Doc] Added documentation for keepDataBetweenModelRuns() to the Extensions page.
  • [Doc] Corrected documentation for longTransmissionLine..., third argument is physical length in meters for a line with 1.0 velocity factor, not electrical length in degrees.
  • [Doc] Editing corrections, improved explanation of thin-wire kernel usage; thanks W2RU.
  • [Doc] Broken link corrections; thanks W2RU and AI6W.
  • Changed Documentation menu name to Help and revamped items to link to pages in this document.
  • Built a version of the nec42 engine that is included as part of the notarized CocoaNEC 3 app. The version in /Applications can be trashed, and there is no longer a need to install gfortran if you want to run CocoaNEC 3 on another Silicon mac.
3.0 (129)
  • Saving a NC program file was setting extension to .deck instead of .nc. Thanks W2RU.
  • Quit with alert at startup when cocoaNEC 3 is already running.
3.0 (123)
  • Increased the font size in the Summary tab.
  • Enabled use of the Font Chooser for the NC program window and the Summary tab. Right-click to open the chooser.
  • Made the Summary tab text editable, so it can be cleared by Select All and Cut.