Welcome to sota-antennas.com! This site aims to provide the radio amateur with easy-to use tools enabling design and modelling of simple wire antennas suitable for portable use in the HF bands, and their performance checked, in a matter of minutes.
Of course, other antenna modelling and design tools and programs do exist - for instance: EZNEC Pro, 4Nec2, MMANA-GAL * and others - they are very powerful, and generally give very good results. The downside is that such programs are often very complex, and involve a steep learning curve in order to become proficient in even the simplest of tasks. Not everyone has the desire to spend so much time in gaining the skills and knowledge required.
The tools provided in this site take much of the complexity out from the task of modelling and designing of simple wire antennas. Parameters such as frequency, wire lengths and angles are easily input, and results presented in graphical form at the click of a button.
Users are encouraged to experiment with a particular antenna designer, to try different values of frequency, antenna section lengths, height of antenna above the ground, try out different ground types, and so on. Spend some time to see what effects these changes have on the antenna's propagation patterns, or on the VSWR, as the changes are made. In this way, you will learn a great deal more about your choice of antenna in particular, and also about antennas in general, than just trying one set of values.
Currently, the following antenna types for the HF bands can be modelled, with more being considered for inclusion:
For each of the antenna types currently supported, any combinations of the following charts and diagrams can be generated and displayed:
Results from the design and modelling can be exported in either PDF, CSV or simple text formats. In addition, antenna dimensions suitable for importing into a professional program can also be exported.
Why "sota-antennas"? - well, this site takes over from the antenna designer in the soon-to-be defunct sotamaps.org site, and expands on it somewhat. The antennas covered here are primarily for amateur portable use, e.g. for SOTA activations, as well as for activations in other amateur award schemes like GMA and WWFF.
Now, we'll be the first to admit that the "sota-antennas" name, while conveying the right kind of idea, is nonetheless pretty lame. Perhaps you can come up with a better (family-friendly) name? - if so, we'd love to hear from you!
* Use the above links with discretion - we accept no liability for the content of external links