Multi Mode (Reflection and Transmission) Operated Dielectric Resonator based Displacement Sensor

Abstract: The authors propose a multi mode operated dielectric resonator based displacement sensor. A cylindrical dielectric resonator is coupled to two 50 ohm microstrip lines to enable the multi mode operating feature. The parameters like S11 in reflection mode and S21 in transmission mode are sensitive to DR displacements w.r.to transmission lines. The HFSS is carried out for numerical analysis and the fabricated sensor prototype is realized with VNA measurement. Both the HFSS and VNA responses are in good agreement with each other for this multi mode operation. This reveals the selection of mode freedom to the choice of operation.