Application of a Cylindrical Dielectric Resonator as an Angular Displacement Sensor

Authors investigate the application of a cylindrical dielectric resonator (CDR) for detecting the angular displacement with the help of numerical simulations. The CDR is made bisymmetric by attaching a metal strip diametrically on its top-face to enable angular sensing in the range of 0 - 90°. The CDR is coupled to a single microstrip line for reflection mode measurement, while it is coupled to two microstrip lines for transmission mode measurement. Identically in both the configurations, the CDR resonates at the HEM
_11δ
mode frequency of ≈3.5 GHz, with the magnitude of the respective S-parameters varying with the strip angle. The CDR configurations provide nearly identical sensitivities and quasi-linear ranges of ≈0.26 dB/°, and 70° respectively for the reflection mode, while ≈0.3 dB/° and 60° respectively for the transmission mode operation.