Tuneless monolithic ceramic filter

Details Tuneless monolithic ceramic filter Tuneless monolithic ceramic filter

H - Electricity

01

P

356/200, 333/63,

H01P 7/10 (2006.01) H01P 1/205 (2006.01)

Patent

CA 1311535

CE00143F Abstract of the Disclosure A ceramic filter (114,118) employs a novel tuning process which avoids the necessity of etching or abrading plating on the surface of the filter. The tuning is provided by determining a selected frequency related characteristic of the dielectric making up the block (210) portion of the ceramic filter. For example, the quarter wave length frequency of the block (210) may be measured. Next, plating artwork (310) is designed in accordance with the determined selected frequency related characteristic. The artwork (310) is then used for selectively applying a conductive material (240) to a surface of the block (210) in order to shift the determined selected frequency related characteristic to a desired (specified) frequency characteristic. By appropriately designing the artwork (310) based on the determined selected frequency related characteristic, no etching or abrading to the plating (240) on the block (210) is required.

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