Singlets and Doublets of Dielectric Slanted Ridge Resonators in Rectangular Waveguide

This work presents a slanted ridge as quasi-TE201 dielectric resonator, excited by TE10 air-filled waveguide propagation. It is demonstrated that the resonant frequency and coupling can be varied using local modifications, without changing the outer metallic waveguide dimensions. The singlet and doublet are demonstrated in WR42 waveguide, using a common stereolithographic 3D printed resin. This paves the way for bandpass or band-stop filter synthesis using dielectric resonators inserted in conventional waveguide without further metallization.