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US 11,901,600 B2Granted
Ceramic waveguide filter including a plurality of resonant cavities coupled by a capacitive coupling structure and a method for manufacture
AssigneeAce Technologies Corporation
InventorDong Wan Chun
Life of this patent
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Abstract
A ceramic waveguide filter comprises a plurality of resonant cavities defined by a plurality of through partition walls formed in a single ceramic block to divide sections of the ceramic block according to a pre-designated pattern, a plurality of resonant recesses formed in the sections of the plurality of resonant cavities divided by the through partition walls, a metal layer formed on an inner surface of each of the plurality of through partition walls, and input/output interfaces formed in two resonant cavities inputting and outputting signals among the plurality of resonant cavities.
Claims16
A ceramic waveguide filter, comprising:
- a plurality of resonant cavities defined by a plurality of through partition walls formed in a single ceramic block to divide sections of the ceramic block according to a pre-designated pattern;
- a plurality of resonant recesses formed in the sections of the plurality of resonant cavities divided by the plurality of through partition walls;
- a respective metal layer formed on a surface of each of the plurality of through partition walls;
- and
- input/output interfaces formed in two of the plurality of resonant cavities for inputting and outputting signals among the plurality of resonant cavities,
- a capacitive coupling structure on one surface of the ceramic block, spaced apart from the plurality of through partition walls and disposed between the plurality of resonant cavities, and
- a metal layer formed on an inside of the capacitive coupling structure,
- wherein the plurality of through partition walls pass through the ceramic block and divides the sections of the ceramic block such that the plurality of resonant cavities having the plurality of resonant recesses are defined,
- wherein the plurality of resonant cavities are spaced apart from each other to filter a pre-designated frequency band while being sequentially coupled with adjacent resonant cavities through coupling windows formed by the plurality of through partition walls in response to the signal input through the input/output interfaces, and
- wherein at least one resonant cavity from among the plurality of resonant cavities is disposed adjacent another one resonant cavity from among the plurality of resonant cavities, thereby allowing cross coupling to occur.
7 more elements
A method of manufacturing a ceramic waveguide filter, comprising:
- in order to define a plurality of resonant cavities in a ceramic block, forming a plurality of through partition walls dividing sections of the ceramic block according to a pre-designated pattern;
- forming a plurality of resonant recesses in the sections of the plurality of resonant cavities divided by the through partition walls;
- forming a respective metal layer on a surface of each of the plurality of through partition walls;
- forming input/output interfaces for inputting and outputting signals in two of the plurality of resonant cavities among the plurality of resonant cavities;
- forming a capacitive coupling structure on one surface of the ceramic block and spaced apart from the plurality of through partition walls between resonant cavities;
- and
- forming the metal layer on an inside of the capacitive coupling structure,
- wherein the plurality of through partition walls pass through the ceramic block and divides the sections of the ceramic block such that the plurality of resonant cavities having the plurality of resonant recesses are defined,
- wherein the plurality of resonant cavities are spaced apart from each other to filter a pre-designated frequency band while being sequentially coupled with adjacent resonant cavities through coupling windows formed by the plurality of through partition walls in response to the signal input through the input/output interfaces, and
- wherein at least one resonant cavity from among the plurality of resonant cavities is disposed adjacent another one resonant cavity from among the plurality of resonant cavities, thereby allowing cross coupling to occur.
7 more elements
Dependencies are inferred from the claim text.