Dual-mode dielectric waveguide filter and dielectric waveguide filtering apparatus
A dual-mode dielectric waveguide filter and a filtering apparatus are provided. The dual-mode dielectric waveguide filter includes a first dielectric cavity including a first dielectric body, a second dielectric cavity including a second dielectric body, electric field directions of the first dielectric cavity and the second dielectric cavity being perpendicular to each other, and a coupling portion connected with the first dielectric body and the second dielectric body to provide a coupling of the first dielectric cavity and the second dielectric cavity, where the first dielectric body and the second dielectric body are both formed in a rectangular parallelepiped shape, the first dielectric body and the second dielectric body are arranged in a stacked manner in a first direction, and two end faces of the first dielectric cavity and the second dielectric cavity in the third direction are formed as a coupling end face.
1 . A dual-mode dielectric waveguide filter, comprising:
a first dielectric cavity comprising a first dielectric body and a first blind hole;
a second dielectric cavity comprising a second dielectric body and a second blind hole, wherein the second dielectric body is integrally formed with the first dielectric body;
a coupling portion connecting a first side of the first dielectric body and a first side of the second dielectric body; and
a metal plating covering outer surfaces of the first dielectric body, the second dielectric body, and the coupling portion,
wherein the first blind hole is recessed from a second side of the first dielectric body opposite to the first side of the first dielectric body, and
wherein the second blind hole is recessed from a second side of the second dielectric body opposite to the first side of the second dielectric body.
2 . The dual-mode dielectric waveguide filter according to claim 1 ,
wherein the first dielectric body is protruded from the second dielectric body and the first dielectric body is centrally aligned with the second dielectric body in a cross-sectional view.
3 . The dual-mode dielectric waveguide filter according to claim 1 , wherein an electric field direction of the first dielectric cavity is towards the second side of the first dielectric body, and an electric field direction of the second dielectric cavity is towards the second side of the second dielectric body.
4 . The dual-mode dielectric waveguide filter according to claim 1 ,
wherein a volume of the first dielectric body is less than a volume of the second dielectric body.
5 . The dual-mode dielectric waveguide filter according to claim 1 , wherein the first dielectric body and the second dielectric body are arranged in a stacked manner.
6 . The dual-mode dielectric waveguide filter according to claim 1 ,
wherein the coupling portion is protruded from the first dielectric body in a plan view.
7 . The dual-mode dielectric waveguide filter according to claim 1 ,
wherein the coupling portion is protruded from the second dielectric body in a cross-sectional view.
8 . The dual-mode dielectric waveguide filter according to claim 1 , wherein an electric field direction of the first dielectric cavity and an electric field direction of the second dielectric cavity are perpendicular to each other.
9 . The dual-mode dielectric waveguide filter according to claim 1 ,
wherein the first dielectric body is formed in a rectangular parallelepiped shape, and
wherein the second dielectric body is formed in a rectangular parallelepiped shape.
10 . A dielectric waveguide filtering apparatus comprising:
at least two dual-mode dielectric waveguide filters,
wherein each of the at least two dual-mode dielectric waveguide filters comprises:
a first dielectric cavity comprising a first dielectric body and a first blind hole;
a second dielectric cavity comprising a second dielectric body and a second blind hole, wherein the second dielectric body is integrally formed with the first dielectric body;
a coupling portion connecting a first side of the first dielectric body and a first side of the second dielectric body; and
a metal plating covering outer surfaces of the first dielectric body, the second dielectric body, and the coupling portion,
wherein the first blind hole is recessed from a second side of the first dielectric body opposite to the first side of the first dielectric body, and
wherein the second blind hole is recessed from a second side of the second dielectric body opposite to the first side of the second dielectric body.
11 . The dielectric waveguide filtering apparatus of claim 10 ,
wherein two adjacent dual-mode dielectric waveguide filters of the at least two dual-mode dielectric waveguide filters are directly coupled by coupling end faces of the two adjacent dual-mode dielectric waveguide filters, and
wherein coupling portions of the two adjacent dual-mode dielectric waveguide filters are towards opposite directions to form a zero point at each end of a passband.
12 . The dielectric waveguide filtering apparatus according to claim 11 , wherein the coupling end faces of the two adjacent dual-mode dielectric waveguide filters comprises an end face of the first dielectric cavity of a first dual-mode dielectric waveguide filter and an end face of the second dielectric cavity of a second dual-mode dielectric waveguide filter.
13 . The dielectric waveguide filtering apparatus according to claim 10 , wherein the at least two dual-mode dielectric waveguide filters are arranged along a straight line.
14 . The dielectric waveguide filtering apparatus according to claim 10 ,
wherein the first dielectric body is protruded from the second dielectric body and the first dielectric body is centrally aligned with the second dielectric body in a cross-sectional view.
15 . The dielectric waveguide filtering apparatus according to claim 10 , wherein an electric field direction of the first dielectric cavity is towards the second side of the first dielectric body, and an electric field direction of the second dielectric cavity is towards the second side of the second dielectric body.
16 . The dielectric waveguide filtering apparatus according to claim 10 ,
wherein a volume of the first dielectric body is less than a volume of the second dielectric body.
17 . The dielectric waveguide filtering apparatus according to claim 10 , wherein the first dielectric body and the second dielectric body are arranged in a stacked manner.
18 . The dielectric waveguide filtering apparatus according to claim 10 , wherein the coupling portion is protruded from the first dielectric body in a plan view.
19 . The dielectric waveguide filtering apparatus according to claim 10 ,
wherein the coupling portion is protruded from the second dielectric body in a cross-sectional view.
20 . The dielectric waveguide filtering apparatus according to claim 10 , wherein an electric field direction of the first dielectric cavity and an electric field direction of the second dielectric cavity are perpendicular to each other.