@PawelK @h4890 @useless_idiot Not immunity but even a somewhat modern anti rad missile could have trouble getting a good fix on the antennas because it is so directional. Radio emissions are minimized. It might have less of a signature than a Bluetooth device.

The best thing is that it's inexpensive to make many of these point to point connections. The Lora is only to help calibrate, a laser and a camera could be used for manual calibration. Servo motors would allow for automated calibration. I've experimented with different antenna designs that I constructed and perhaps I should get back into it.