Ham Radio: 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

A discussion of the Moxon wire beam antenna, Moxon antenna design software and a 17 meter ham radio Moxon antenna project.

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.

Articles on homebrewing, amplifier building, and antenna modeling from K8CU.

MMANA by JE3HHT - freeware software for antenna modeling