Patent ID: 8907846

Claim:
A single-antenna direction finding system for multi-rotor platforms, comprising: a UAV having multiple rotors, the multiple rotors changing attitude, speed, and direction of the UAV; a direction finding antenna fixed to the UAV; control circuitry operably connected to the multiple rotors, the control circuitry maintaining a desired pitch roll and yaw of the UAV; a direction finding (DF) processor onboard the UAV, the DF processor being operably connected to the control circuitry, the DF processor including: a DF receiver connected to the DF antenna; means for controlling the UAV to determine an azimuth of maximum signal strength of a signal received by the DF receiver; means for controlling the UAV to determine an elevation of maximum signal strength of a signal received by the DF receiver; and means for controlling propulsion of the UAV along the azimuth and elevation of maximum signal strength towards the signal received by the DF receiver.