A Microwave Resonator Realized Combined Displacement Sensor

In this work, a microwave resonator realized combined displacement sensor is presented. To realize this, a metal-strip loaded DR is coupled to a pair of 50 ohm microstrip lines. The change in
$\vert \mathrm{S}_{21}\vert$
helps to find out the displacement. The proposed model excites both the strip mode and DR mode based on the alignment of movable resonator to fixed microstrip lines. To verify the HFSS response, the fabricated prototype is tested with VNA. The sensor features are compared with the existing combined displacement sensors.