Application of HEM11δ Mode in DR based Linear Displacement Sensor

Abstract

Presented a numerical investigation on the application of HEM 11δ mode in a dielectric resonator (DR) sensor. A simple two-port network is implemented by placing two microstrip lines opposite to each other for full transmission. A dielectric resonator (DR) is placed between them to detect the coupling w.r.to its displacement. Proposed transmission mode operated DR excite HEM 11δ mode at~ 3.7 GHz. Here, the DR positional movement produces identical results in both directions (+dx/ -dx) due to the structural bisymmetry. This single frequency operated Transmission circuit provides 1.78 dB/mm sensitivity in the 0 - 9 mm range.