A good place to start is a series of four articles written by L.B. I’ve spent the last few days learning a little bit about antenna modeling and thoroughly enjoying using 4nec2. So, all the files included with the ARRL Antenna Book are available to use as well as many files on the internet. This is one COOL program! In addition to numerous modeling files included with the program it can also open and convert EZNEC files. 4nec2 was written by Arie Voors for his own use but has made it available as freeware. My search turned up a free program called 4nec2. You can modify those files but if you save the changes then the program reverts to demo mode when you re-open those files. Plus, the ARRL version only works with the antenna files included with the antenna book. I had looked at the version that is bundled with the ARRL Antenna Book but never really figured out how to use it. Most hams have probably heard of and many use EZNEC. However, K5HCT’s inquiry piqued my interest so I did a search for antenna modeling software. I didn’t have an antenna modeling program and had never done any modeling so I referred him to W5AJ. Earlier this week K5HCT emailed me asking if I could model an antenna design he was thinking of building.
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