Filter assemblies and communication systems based thereon
AssigneeHuber+Suhner AG
InventorsUhland Goebel, Marlin Wagner
Life of this patent
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Abstract
A filter assembly (300) with a plurality of cavities serving as said waveguide resonators is presented. The cavities are arranged at least on two levels (x1, y1; x2, y2) of said filter assembly (300). Two or three molded filter parts (301, 302, 303) define the cavities, when the filter parts (301, 302, 303) are assembled. A first opening in a wall between a first and a second of cavity is provided. Said opening serves as capacitive junction between said first cavity and said second cavity. A second opening is provided in another wall between a third cavity and a fourth cavity, said opening serving as inductive junction. The filter parts (301, 302, 303) are at least partially covered by a metal layer.
Claims19
A filter (100;
- 200;
- 300) with several waveguide resonators (100;
- 200;
- 300) comprising:
- a plurality of cavities (C1-C9) serving as said waveguide resonators, said cavities (C1-C9) being arranged at least on two levels (x1, y1;
- x2, y2) of said filter (100;
- 200;
- 300),
- a first opening (11.1) in a wall (11.2) between a first (C1) and a second (C2) of said cavities (C1-C9), said opening (11.1) serving as capacitive junction between said first cavity (C1) and said second cavity (C2),
- a second opening (12.1) in another wall (12.2) between a third (C3) and a fourth (C4) of said cavities (C1-C9), said opening (12.1) serving as inductive junction between said third cavity (C3) and said fourth cavity (C4), wherein said filter (100;
- 200;
- 300) is a filter assembly (100;
- 200;
- 300) with at least two plastic molded filter parts (301, 302, 303) defining said cavities (C1-C9), when said two plastic molded filter parts (301, 302, 303) are assembled,
- said plastic molded filter parts (301, 302, 303) being at least partially covered by a metal layer.
A communications system (400) being designed for operation in the Gigahertz frequency range to higher frequencies, said communication system (400) comprising a front-end module (401), a high-gain antenna (402), and a filter (300), comprising:
- a plurality of cavities (C1-C9) serving as waveguide resonators, said cavities (C1-C9) being arranged at least on two levels (x1, y1;
- x2, y2) of said filter (300),
- a first opening (11.1) in a wall (11.2) between a first (C1) and a second (C2) of said cavities (C1-C9), said opening (11.1) serving as capacitive junction between said first cavity (C1) and said second cavity (C2),
- a second opening (12.1) in another wall (12.2) between a third (C3) and a fourth (C4) of said cavities (C1-C9), said opening (12.1) serving as inductive junction between said third cavity (C3) and said fourth cavity (C4), characterized in that said filter (100;
- 200;
- 300) is a filter assembly (100;
- 200;
- 300) with at least two plastic molded filter parts (301, 302, 303) defining said cavities (C1-C9), when said two molded filter parts (301, 302, 303) are assembled,
- said plastic molded filter parts (301, 302, 303) being at least partially covered by a metal layer.
A method for making a filter (100;
- 200;
- 300) with several waveguide resonators comprising the steps:
- injection-molding at least two plastic molded parts of the filter assembly in perfect fit, including a central plastic molded part comprising cavities, using a tool that can be used for making a large quantity of plastic molded parts;
- applying a metallization before the plastic molded parts of the filter assembly are assembled so that the plastic molded parts are at least partially covered by a metal layer;
- and
- assembling the plastic molded parts by a press-fitting process, so that the filter (100;
- 200;
- 300) comprises a plurality of cavities (C1-C9) being arranged at least on two levels (x1, y1;
- x2, y2) of said filter (300).
Dependencies are inferred from the claim text.