A radio navigation angle measurement method with entangled microwave signals

There are the common problems of limited precision, low anti-interference ability and poor signal detection performance in the classical radio navigation angle measurement systems. To solve these problems, we present a radio navigation angle measurement method realized by entangled microwave signals. Entangled microwave signals are transmitted to free-space and the quadrature components of the signals are measured in the receiving end. When delaying transmitting signals in continuous real time, the correlated baseline generated by the correlation peak of entangled microwave signals will scan back and forth with high-speed. A receiver situated in the scanning areas could measure the contiguous interval of signals. According to the mathematical relation, the azimuth of the receiver relative to centerline could be derived. Imagining applying it to the landing process of aircraft, we design the implementation scheme and devices. With the quantum space-time correlation and no-clone characteristics, there are superior precision, anti-multipath interference ability and signal detection performance for entangled microwave signals. Our research will serve as a new way for radio navigation angle measurement systems.