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.

Focusing on the problem of vulnerable anti-deception and weak anti-jamming ability in classical pseudorandom code correlation ranging, we present a navigation ranging scheme with true random entangled microwave signals. One path of the entangled microwave signals uses for transmitting signal and another path of the signals preserves at locality. Firstly, the target that possesses the function of quantum repeater receives transmitting signal and forwards it to the locality. Then, correlation detection is implemented between the forwarded signal and the local delayed signal. Finally, the target distance can be calculated by delay measurement. We analyze the ranging precision and anti-deception ability. Results indicate that the scheme not only is superior to classical code correlation ranging precision, but also has very strong anti-multipath ability and anti-multipath interference ability, which will enhance the security of the navigation ranging system. Our investigation has significant application prospects.

We report high-data rate reception of polarization division multiplexing signals using graphene-on-plasmonic slot waveguide photodetectors with bandwidth exceeding 70 GHz. 128 Gbps NRZ and 224 Gbps PAM-4 signals reception are experimentally demonstrated at 1550 nm with high quality.