Dual-mode monoblock dielectric filter
AssigneeThe Chinese University of Hong Kong
InventorsKe-Li Wu, Yuliang Chen, Yan Zhang
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Abstract
A dual-mode dielectric resonator using two dissimilar modes is described, the dissimilar modes supported by a ridge waveguide resonator and a ½-wavelength metalized cylindrical resonator within a single, metal-coated dielectric block. Each ridge waveguide resonator and cylindrical resonator form a resonator pair. Multiple pairs of ridge waveguide/cylindrical resonators are fabricated in the same dielectric block to form an 8-pole dielectric resonator filter for 5G or other applications. Transmission zeros can be positioned by the location of feeding probes along the cylindrical resonators.
Claims21
A dielectric resonator filter apparatus comprising:
- a dielectric block having a top and sides;
- a right prism depression in the top of the dielectric block;
- a horizontal cylindrical cavity within the dielectric block, the horizontal cylindrical cavity having an axis that is parallel with the top of the dielectric block;
- a first conductive layer covering the dielectric block and the right prism depression;
- and
- a second conductive layer covering an inside surface of the horizontal cylindrical cavity, wherein the first conductive layer is electrically isolated from the second conductive layer,
- whereby the right prism depression is a ridge waveguide resonator that is dominated by a transverse electric (TE101) mode, and the horizontal cylindrical cavity is configured to support a transverse electromagnetic (TEM) mode of electromagnetic waves within operating wavelengths of the dielectric resonator filter apparatus, the right prism depression configured to affect electromagnetic coupling between the TE101 and TEM modes.
Dependencies are inferred from the claim text.