u/GoVlad314

Hey there. A while back I shared AntennaSim here, the free and open source NEC2 antenna simulator that runs in your browser. The response was way more than I expected and a load of you sent feedback and ideas, so I've been chipping away at them ever since. Here's what's new if you fancy another go.

What's landed since launch:

• Multi band sweeps in one run, so instead of checking 20m, then 15m, then 10m one at a time you simulate them all together and see how the antenna does across every band at once. There's a per band breakdown of SWR, gain and bandwidth too.
• Catenary sag for hung wires, so you can model how a wire actually droops between supports.
• Bend a wire to whatever angle you want.
• Axis locking while you drag, plus moving several wires at once, which makes laying out real antennas a lot less fiddly.
• An impedance matching calculator for L, Pi and T networks.
• More band presets, now with ITU region support.
• Save and load your projects.
• A validation pass that warns you about common mistakes before you hit run.
• And a good pile of bug fixes.

Still completely free, still GPL-3.0, still a real nec2c engine running right in the browser, or self hosted with Docker if that's more your thing.

Thanks again to everyone for the kind words last time, honestly meant a lot. If you tried it at launch it's worth another look, and if there's an antenna you've been meaning to model just give it a go. It's everyone's project at this point really, so don't be shy about opening an issue or a PR, and tell me what would make it more useful for you. We keep making it better together.

Browser version: https://ea1fuo.github.io/AntennaSim/

Code: https://github.com/EA1FUO/AntennaSim

73 de EA1FUO