A Dual Port Low Reflection Microwave Angular Displacement Sensor Based on Transversal Signal Interference Principle

This paper presents the design and implementation of a novel dual-port low-reflection microwave angular displacement sensor that employs the transversal signal interference (TSI) principle to achieve high-precision and large-range dual-parameter sensing. It has good linearity in the sensing range of 0°-180°, and the sensitivity accuracy can reach 0.6 MHz/deg and 0.033 dB/deg. The sensor is specially designed to minimize reflection interference, and the sensor is low-reflective by integrating absorption filter networks both at the input and output ports, which greatly improves the practicality of microwave sensors in practical applications. Simulations and implementation measurements prove that the sensor can realize excellent linearity and dynamic range with low reflection characteristics.