Ham Radio: Antenna software

4nec2 is a freeware antenna modeling program that has 3d output capabilities. From the website: 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.

AC6LA Modeling software and antenna programs
MultiNEC - Run Antenna Modeling Programs on AutoPilot
EZPlots - Plot EZNEC Frequency Sweep Data
XLZIZL - Picture the Rest of Your Antenna System
TLDetails - Transmission Line Program with Animated Charts
MoxGen - Moxon Rectangle Generator

Antenna Solver (copyright 1999, 2002 by Dr. David Fluckiger, KJ5AT) calculates the current density and charges for general wire structures including surfaces. Freeware

Cubical Quad Antenna JavaScript Calculator

Expert MiniNEC

EZNEC
EZNEC and EZNEC+ 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

K7NV YagiStress
YagiStress (YS) is a full featured, graphical, user friendly program that performs structural analysis on horizontally polarized yagi antennas constructed from round tubing. YS can work in Imperial or Metric Units, and is likely to tell you more about a yagi antenna than you ever thought you needed to know. YS has been used by commercial manufacturers and premier station builders for over a decade.

LinSmith - Smith chart program for Linux. linSmith is a Smith Charting program, mainly designed for educational use. As such, there is an emphasis on capabilities that improve the 'showing the effect of'-style of operation.

MMANA by JE3HHT

NEC4WIN95
NEC4WIN95 is a 32 bits antenna simulation software based on MININEC3 developed by the Naval Ocean Systems Center in the 70s and 80s. It runs under Windows 95, 98, NT and 2000. It can be used to simulate, analyze and optimize wire antennas, beams, verticals, etc... NEC4WIN95 has limitations. They are the same as Mininec3 on which the engine is based. Close parallel wires, horizontal wires too close to the ground, sharp corners may be a problem to simulate. Log Periodics and Transmission Lines can't be simulated accurately with it. Antenna impedance is always calculated based on Perfect Ground. The number of wires supported by NEC4WIN95 is limited to 50 and segment to 250 and for complex projects you should look at NEC4WIN95VM.