Dielectric filter
First Claim
1. A filter (1) comprising a body of dielectric material having an upper surface (2), a lower surface (14), two side surfaces (4, 15), two end surfaces (16, 17) and at least one hole (3) which extends from the upper surface to the lower surface and an electrically conductive layer (5) covering major portions of the lower surface;
- one side surface, both end surfaces and the surface of said hole thereby forming a transmission line resonator, the uncoated side surface extending in a plane and having an electrode pattern (18) thereon for providing electrical signal coupling to and from the transmission line resonator, first and second parallel flanges (6) extending from the two opposing end surfaces and extending beyond the patterned side surface so as to bound the patterned side surface on two sides, said flanges each having multiple flange surfaces with one side flange surface (12) arranged for mounting said filter on a substrate (9) such that the patterned side surface spaces away from the substrate, each of the one side flange surfaces extending in a plane parallel to that of the plane of the patterned side surface and being coated with an electrically conductive material.
1 Assignment
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Accused Products
Abstract
The body of a dielectric filter is provided with at least two parallel flanges (6) on either side of a side surface (4) having electrode patterns thereon, which project from the plane of the patterned side surface (4). The filter (1) is fastened, with the patterned side surface (4) facing downwards, to a base (9), for example a circuit board, which has, at least on one side, over an area the size of the filter, a conductive material which is in electrical contact with the coated surfaces of the filter. The filter is thus enveloped by a conductive layer on substantially all its sides.
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Citations
11 Claims
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1. A filter (1) comprising a body of dielectric material having an upper surface (2), a lower surface (14), two side surfaces (4, 15), two end surfaces (16, 17) and at least one hole (3) which extends from the upper surface to the lower surface and an electrically conductive layer (5) covering major portions of the lower surface;
- one side surface, both end surfaces and the surface of said hole thereby forming a transmission line resonator, the uncoated side surface extending in a plane and having an electrode pattern (18) thereon for providing electrical signal coupling to and from the transmission line resonator, first and second parallel flanges (6) extending from the two opposing end surfaces and extending beyond the patterned side surface so as to bound the patterned side surface on two sides, said flanges each having multiple flange surfaces with one side flange surface (12) arranged for mounting said filter on a substrate (9) such that the patterned side surface spaces away from the substrate, each of the one side flange surfaces extending in a plane parallel to that of the plane of the patterned side surface and being coated with an electrically conductive material.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
Specification