Greetings friends! It’s time for antennas!
Today, aliexpress is replete with cheap antennas for the 868 band, but 99% of the time they are not tuned or tuned very poorly or very poorly performed.
I modeled and manufactured several practical structures, which, despite their simplicity, are easy to make with your own hands and configure (if you have a NanoVNA V2 device). Moreover, such antennas will have characteristics many times better than stock antennas. This means that the communication range between your Meshtasick-devices can theoretically increase from 2 to 20 times!
Note: Unfortunately, I do not have a 3D printer and I do not have the skills to make complex mechanical products, but I can model and prototype antennas. Therefore, all my designs look like “kitchen-table effort” or “quick-and-dirty”. I invite everyone who knows how to create mechanical structures to discuss and supplement the material presented below with their practical implementations of antenna products.
All related materials can be found on my github page: GitHub - NanoVHF/Meshtastic-DIY
In a neighboring branch, a colleague @j2db1k presented his designs for the 433MHz band:
Let’s start …