DISTRIBUTED ELEMENT FILTERS FOR ULTRA-BROADBAND COMMUNICATIONS
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United States of America Patent
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Issued Date -
Feb 27, 2014
app pub date -
Aug 23, 2012
filing date -
Aug 23, 2012
priority date (Note) -
Abandoned
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Abstract
A method for constructing a radio frequency filter (100) includes depositing on a dielectric substrate (102) a plurality of layers of a conductive material (210, 216, 218, 220, 222), a dielectric material (217), and a sacrificial material (1200, 1500, 1700, 1900). The deposition is controlled to form at least one transmission line (104, 106, 108) including a shield (202) and a center conductor (204) disposed coaxially within the shield. The deposition is further controlled to form at least one distributed filter element electrically coupled to the center conductor (204), and at least one housing (402) electrically coupled to the shield. The method also includes dissolving at least one layer of the sacrificial material to form an interior channel (226) within at least one shield. The dissolving of the sacrificial material also results in the formation of a interior space within at least one housing containing the distributed filter element.
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