A 915-MHz data-acquisition project required a small antenna, but the available antennas lacked the necessary characteristics: efficiency, compactness—that is, smaller than a standard 3-in.

Stathack explains the whole project over at his blog (linked below), but essentially he managed to turn the mesh strainer and the baby bottle into a directional parabolic antenna so he could mooch ...

[Mare] has a visual guide and simple instructions for making DIY mini helical 868 MHz antennas for LoRa applications. 868 MHz is a license-free band in Europe, and this method yields a perfectly se… ...

Going directional creates the chore of keeping the antenna pointed at the aircraft. [Brandon’s] smart antenna tracker is designed to do all that automatically.

RAKwireless WisMesh Board ONE allows users to create custom Meshtastic nodes with optional OLED, GPS, antennas, battery, and enclosure.