Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1996-07-09
1998-04-28
Lee, Benny
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333206, H01P 1202
Patent
active
057450188
ABSTRACT:
A ceramic filter with a coplanar shield which has: a filter body (302) comprising a block of dielectric material having top (304), bottom (306) and side surfaces (308,310,312,314), and having a plurality of metallized through holes (316) extending from the top (304) to the bottom (306) surfaces defining resonators; a metallization layer substantially coating the bottom (306) and the side surfaces (306,310,312,314), and the top surface (304) having a metallized pattern thereon defining a top pattern; input-output pads (318); and a conductive shield (322) having standoff legs (324) which maintain the conductive shield at a predetermined height above the top pattern of the filter body, the standoff legs (324) are connected to a portion of the top pattern on the top surface of the filter at a desired distance from the side surface having the input-output pads.
REFERENCES:
patent: 4742562 (1988-05-01), Kommrusch
patent: 5103197 (1992-04-01), Turunen et al.
patent: 5218329 (1993-06-01), Vangala et al.
patent: 5278527 (1994-01-01), Kenoun et al.
Cunningham Gary J.
Lee Benny
Motorola Inc.
Raufer Colin M.
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