US 2010/0141352 A1 · Duplex Filter with Recessed Top Pattern Cavity

Abstract

A duplex filter includes a core of dielectric material with top, bottom, and side surfaces, and first and second spaced-apart sets of through-holes extending therethrough. A wall extends outwardly from the top surface to define a peripheral rim and cavity. A pattern of metallized and unmetallized areas are defined on selected core surfaces including strips of metallization on the top surface that extend onto the wall and the peripheral rim thereof to define respective transmit, receive, and antenna connection posts. In one embodiment, the core is made from two separate blocks which have been coupled together to define an interior metallized layer which separates the first and second sets of through-holes and an exterior wall on the top surface separates the respective transmit and receive conductive patterns thereon.

Claims15

Dependent claims

A filter comprising:

a core with a top surface, a bottom surface, and side surfaces, said core defining a first and second set of spaced-apart through-holes, each through-hole extending through the core from an opening defined in said top surface to an opening defined in said bottom surface;
at least first, second, and third posts extending outwardly from said top surface;
and
a surface-layer pattern of metallized and unmetallized areas on said core, said pattern including a first connection area of metallization located on said top surface and extending onto said first post, a second connection area of metallization located on said top surface and extending onto said second post, and a third connection area of metallization located on said top surface and extending onto said third post.

1 more element

Dependencies are inferred from the claim text.

Duplex Filter with Recessed Top Pattern Cavity

Life of this patent

Duplex Filter with Recessed Top Pattern Cavity

Life of this patent

Abstract

Claims15