最新的4NEC2版本（5.8.11）
RELEASE NOTES
Changes for 5.8.15 (jan 2015)
- Allow frequencies 'from file' when generating far-field data.
Changes for 5.8.14 (mar 2014)
- Second bugfix on the same below 3D issue.
- Bugfix in 3D viewer which under specific circumstances did not show a wire/element.
- Bugfix when using between 10000 and 32000 segments with Nec4.2
- Bugfix for X coordinate when parsing Nec4 based output data.
- Bugfix in Main (F2> data when using Nec4.2 engine.
Some 4Nec2 features
* Graphical 2D and 3D visualization of Far- and Near-field data and Geometry strutures (including circular polarization view).
* Line-chart visualization for freq-sweep Gain, F/B, F/R, SWR and impedance data.
* Drag and drop style Geometry Editor to assist the starting antenne modeller.
* Full Nec2 and Nec4 command support, including GX, GM, GR, GA, GH and surface patches.
* Capable of running up to 11000 wires and/or segments (limited by the max of 2Gb of windows on-board memory)
* Support for inclusion of surface-wave component in far-field data.
* 3D geometry display for surface patches included.
* Variable substitution included for complete Nec2/4 command set enabling you to model by equation.
* Sophisticated real-time 3D geometry and pattern viewer showing real wire-radius.
* AO-style gradient/hill-climbing optimizer included.
* Genetic Algorithms based optimizer included.
* Automatic variable sweeper with line-chart output.
* Automatic convergence tester with line-chart output.
* Interactive Smith chart visualization for freq-sweeps.
* Integrated Sommerfeld ground calculations with frequency-sweep.
* Automatic generation of VOACAP propagation prediction type 13 and –14 antenna files.
* Automatic coversion of AO (*.ant)and EZnec (*.ez)input files.
* ‘Insulated-Wire’ and 'LC-trap' loading-types included.
* Automatic conversion for feet, inch, #awg to meters and elevation/azimuth to phi/theta and reverse.
* Batch processing for automatic testing, calculation and/or conversion of multiple Nec, AO and/or EZnec input-files.
* Extensive segment- en geometry validation, such as: Intersecting volumes, Short/thick wires at sharp angle,Unequal segmentation for parallel wires, Too low hight, Large radius or length changes at junctions, etc.
* Screen grabber for easy cut/paste, print or save parts of the screen, window or form.
* Geometry builder to create cylindric, patch, plane, box, helix and parabola shaped structures using auto-segmentation and/or equal-area rules.
* Automatic generation of Stub-, L-, Pi- and Tee-matching-networks (low- and high-pass)
* Visualization ofcircular polarization components E(left) and E(right) for far-field.
* EZnec style MiniNec ground included.
* Capable of running the default Lawrence Livermore National Laboratories Nec4 engine.
* Running on all systems from early Windows-95 to latest Windows-Vista
* More than 450 example files
* Context sensitive Help-file.
* Completely free.
早都有了，仍然没法仿真面天线，现在在学HFSS，呵呵 由何用处？ 这是天线仿真？ 非常实用，楼主真好 准备试试看 看看再说。 看看什么效果 看看咋样了 好好学习！ 好好学习
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