I have taken on a project (involving mini quads if you know anything about them) and I have come up with a half baked solution that would involve measuring the RSSI of a signal of a giving frequency. These frequencies would be in the 5.8GHz range. I've read it may be possible to just use a piece of wire as an antenna etc however I don't know of a way of tuning the circuit to the given frequencies. Maybe using a transistors to connect some capacitors of different values? I don't have a clue.
Thank you
Thank you