RF monoblock filter with outwardly extending wall to define a cavity surrounding a top surface of the filter

A filter comprising:

• a core of dielectric material including a top surface with at least a pattern of conductive areas;
• a plurality of through-holes extending through the core and defining a plurality of respective openings in the top surface;
• a wall extending outwardly from and surrounding the top surface, the wall including an inner surface, an outer surface, and a top rim and defining a single cavity in the filter and wherein at least a portion of the wall includes a sloped inner surface;
• and
• at least a first conductive input/output electrode defined by a conductive area formed on at least the sloped inner surface and the top rim of the wall and in contact with the conductive areas on the top surface of the core.

A filter comprising:

• a block of dielectric material with a top surface, a bottom surface, and at least one side surface, the block defining at least a first through-hole extending between a respective opening defined in the top surface and a corresponding opening defined in the bottom surface;
• a plurality of walls extending outwardly from the top surface including at least a first wall with a sloped inner surface;
• a pattern of metallized and unmetallized areas defined on the block, including:
• a contiguous area of metallization covering at least a portion of the top, bottom and side surfaces, the at least a first through-hole and at least a portion of the plurality of walls;
• at least a first resonator pad surrounding the opening of the at least a first through-hole and electrically coupled to the contiguous area of metallization;
• an input electrode defined on the top surface and extending onto the sloped inner surface of the at least a first wall;
• an output electrode defined on the top surface and extending onto the sloped inner surface of the at least a first wall;
• and
• a contiguous unmetallized area substantially surrounding the first resonator pad, the input electrode and the output electrode.

A filter comprising:

• a core of dielectric material with a top surface, a bottom surface, and at least first, second, third, and fourth side surfaces, said core defining a series 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;
• a wall of dielectric material extending outwardly from the top surface of the core;
• first and second posts located between respective first and second pairs of slots extending through the wall;
• a surface-layer pattern of metallized and unmetallized areas on said core, said pattern including:
• a wide area of metallization;
• at least one pad of metallization formed on said top surface and surrounding at least a portion of one or more of said openings in said top surface;
• an input connection area of metallization located on said top surface and extending onto said first post;
• and
• an output connection area of metallization located on said top surface and extending onto said second post.

A filter comprising:

• a core of dielectric material with a top surface, a bottom surface, and at least first, second, third, and fourth side surfaces, said core defining a series 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;
• a wall of dielectric material extending outwardly from the top surface of the core;
• first and second posts located between respective first and second pairs of slots extending through the wall, the first and second posts each include a sloped inner surface;
• and
• a surface-laver pattern of metallized and unmetallized areas on said core, said pattern including:
• a wide area of metallization;
• at least one pad of metallization formed on said top surface and surrounding at least a portion of one or more of said openings in said top surface;
• an input connection area of metallization located on said top surface and extending onto said first post;
• and
• an output connection area of metallization located on said top surface and extending onto said second post.

A filter comprising:

• a core of dielectric material with a top surface, a bottom surface, first and second opposed end side surfaces, and third and fourth opposed side surfaces extending between the first and second opposed end side surfaces, said core defining a series 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;
• a wall of dielectric material extending outwardly from the top surface of the core;
• first and second posts located between respective first and second pairs of slots extending through the wall, said first and second posts being located between said respective first and second pairs of slots extending through said wall along said third and fourth opposed side surfaces respectively in a relationship spaced from the first and second opposed end side surfaces respectively;
• and
• a surface-layer pattern of metallized and unmetallized areas on said core, said pattern including:
• a wide area of metallization;
• at least one pad of metallization formed on said top surface and surrounding at least a portion of one or more of said openings in said top surface;
• an input connection area of metallization located on said top surface and extending onto said first post;
• and
• an output connection area of metallization located on said top surface and extending onto said second post.