RF Monoblock Filter with Recessed Top Pattern and Cavity Providing Improved Attenuation

An electrical signal filter defined by a block of dielectric material with a top surface, a bottom surface, side surfaces, and through-holes extending between the top and bottom surfaces. In one embodiment, first and second walls protrude outwardly from the top surface and extend the length of first and second opposed longitudinally extending side surfaces. A surface-layer pattern of metallized and unmetallized areas is defined on selected surfaces of the block including an area of metallization that covers the top surface. In one embodiment, first and second surface-layer input/output electrodes are defined by first and second respective isolated strips of conductive material that extend from the top surface of the block and onto the first and second walls respectively.

RF Monoblock Filter Assembly with Wall Filter

An RF filter assembly comprising two filters. In one embodiment, the RF filter assembly comprises a core of dielectric material including a plurality of through-holes and a surface-layer pattern of conductive areas on a top surface of the core that define a first RF filter and a second RF low pass filter is defined, and extends between respective conductive input/output electrodes, on a wall that protrudes outwardly and upwardly from a top surface of the RF filter assembly. 1. A filter adapted to be mounted to a substrate and comprising:a core of dielectric material including a top surface with a first pattern of areas of conductive material, first and second opposed side surfaces, and third and fourth opposed side surfaces extending between the ends of the first and second opposed side surfaces respectively;a plurality of through-holes extending through the core and defining a plurality of respective openings in the top surface, the first pattern of areas of conductive material on the top surface surrounding at least a portion of one or more of the openings in the top surface;at least first and second walls protruding outwardly from the top surface, each of the first and second walls including an inner surface, an outer surface, and a top rim, the first and second walls defining respective first and second shields which prevent external electromagnetic fields from causing noise and interference;a first conductive input/output electrode on the first wall and in contact with the first pattern of areas of conductive material on the top surface of the core;a second conductive input/output electrode on the first or second wall;a first filter defined in part by the first pattern of areas of conductive material on the top surface of the core; anda second filter defined on one or more of the side surfaces of the core.2. The filter of further comprising a third conductive input/output electrode on the first or second wall and in contact with the first pattern of areas of ...

Duplex Filter with Recessed Top Pattern and Cavity

A duplex filter includes a block of dielectric material with top, bottom, and side surfaces and first and second spaced-apart sets of through-holes. A pair of outside walls and a center wall extend outwardly from the top surface. A pattern of metallized areas is defined on the top surface of the block including first and second electrodes that extend on the pair of outside walls respectively and third and fourth electrode antennae that extend on the center wall. The block may be two separate blocks coupled together to form an interior layer of metallization separating the first and second sets of through-holes and the center wall separates respective transmit and receive portions of the pattern of metallized areas. 1. A filter comprising:a core with a top surface, a bottom surface, and side surfaces, said core defining a longitudinal axis, a first plurality of through-holes extending longitudinally along the top surface of the core, a second plurality of through-holes extending longitudinally along the top surface of the core in a spaced-apart and generally parallel relationship to the first plurality of through-holes, the first and second plurality of through-holes being spaced-apart from and located on opposite sides of the longitudinal axis of the core, each of the through-holes of the first and second plurality of through-holes extending through the core from an opening defined in said top surface of said core to an opening defined in said bottom surface of said core;a center wall extending upwardly from the core in a relationship co-linear with the longitudinal axis of the core, the first and second plurality of through-holes being spaced-apart from and located on opposite sides of the center wall; anda surface-layer pattern of metallized and unmetallized areas on said core, said pattern including first and second connection areas of metallization located on said top surface, and a third connection area of metallization located on said top surface and extending ...

Bracket for RF Monoblock Filter and Filter-PCB Assembly Incorporating the Same

A combination RF filter and printed circuit board assembly wherein the RF filter is defined by a block of dielectric material including at least first and second side surfaces. A metal bracket with a plurality of fingers is secured to each of the first and second side surfaces. The fingers on the brackets extend through respective apertures in the printed circuit board and are soldered to the printed circuit board. The brackets relieve and transfer the thermal and mechanical stresses that result from use of a filter and printed circuit board that are made of materials with different thermal and mechanical characteristics and reduce the risk of cracking or damage to the filter, the printed circuit board, and the solder joints during use. 1. A bracket for an RF filter comprising a plate adapted to be secured to a side of the RF filter and means for securing the plate to a substrate.2. The bracket of claim 1 , wherein the means for securing the plate to the substrate comprises a plurality of fingers on the plate adapted to be inserted through respective apertures defined in the substrate for securing the plate to the substrate.3. The bracket of claim 2 , wherein the fingers of the plate are soldered to the surface of the substrate.4. An RF filter assembly comprising:an RF filter including a block of dielectric material having opposed first and second side surfaces; andfirst and second brackets secured to the opposed first and second side surfaces of the block of the RF filter and adapted for securement to a printed circuit board.5. The RF filter assembly of claim 4 , wherein the first and second brackets each include a plurality of fingers adapted to be inserted through respective apertures defined in the printed circuit board.6. The RF filter assembly of claim 5 , wherein the plurality of fingers on the first and second brackets are soldered to the surface of the printed circuit board.7. A combination RF filter and printed circuit board assembly comprising:a printed ...

Ceramic filter with window coupling

The present application is directed to a filter and methods of transmitting a signal through the filter. The filter includes a pair of adjoined blocks of dielectric material. A top surface of each block has a conductive patterned region. The filter also includes plural spaced apart through-holes extending through each block from the top surface to a bottom surface. The through-holes are partially surrounded by the patterned region. The filter also includes a peripheral window disposed between the adjoined blocks to permit a coupling between adjacent through-holes of the adjoined blocks. The filter also includes an in-line window and/or a crenellation located within a block of the pair of blocks and disposed between adjacent through-holes of the block to limit or tune coupling between the adjacent through-holes. The application is also directed to a system including a printed circuit board and a filter.

Shaping of structures of ceramic filters

The present application is directed to a filter and methods of making the same. The filter includes a block of dielectric material with a top surface including a patterned region, a bottom surface, and side surfaces. The filter also includes a through-hole extending through the block from the top surface to the bottom surface. The through-hole may include a top edge that connects the top surface with an inner wall of the through hole and a bottom edge that connects the bottom surface with the inner wall of the through hole. The top edge or bottom edges of the through-hole may be rounded, chamfered, or tapered.

Ceramic filter with differential conductivity

The present application is directed to a filter and methods of making the same. The filter includes a block of dielectric material with a top surface including a patterned region, a bottom surface, and side surfaces. The filter also includes a through-hole extending through the block from the top surface to the bottom surface. The through-hole is partially surrounded by the patterned region. The filter also includes a wall extending from the top surface, the wall having an inner surface, an outer surface, and a roof. The bottom surface, side surfaces, outer surface, and roof have a first coating of silver and glass frit. The patterned region, through-hole and inner surface have a second coating of silver and glass frit. The glass frit in the first coating is at least 0.5% greater than the glass frit in the second coating. The application is also directed to a system including a printed circuit board and a filter.

TUNING AND MEASUREMENT FIXTURES FOR CERAMIC FILTERS

The application at least describes a tuning and measurement fixture. The fixture comprises a bottom plate including side surfaces, a top surface and a bottom surface. The bottom plate includes a window extending between the top and bottom surfaces. The window can expose a through-hole of a filter positioned in the fixture. In addition, the top surface of the filter includes a signal connection and a ground connection configured to communicate with the filter. The bottom surface of the filter includes an RF port configured to transmit electrical characteristics of the filter. A top plate of the filter includes a top and a bottom surface. The top plate is separated from the bottom plate by a predetermined height. The top plate includes a window extending between the top and bottom surfaces. The window exposes the through-hole of the filter held in the fixture. The application also describes a method of tuning and measuring a filter in a fixture. 1. A tuning and measurement fixture comprising: the top surface including a signal connection and a ground connection configured to communicate with the filter,', 'the bottom surface including an RF port configured to transmit electrical characteristics of the filter, and, 'a bottom plate including side surfaces, a top surface and a bottom surface, the bottom plate including a window extending between the top and bottom surfaces, the window configured to expose a through-hole of a filter positioned in the fixture,'}a top plate including a top and a bottom surface, the top plate separated from the bottom plate by a predetermined height, the top plate including a window extending between the top and bottom surfaces, the window configured to expose the through-hole of the filter held in the fixture.2. The fixture of claim 1 , wherein the bottom plate includes a recessed channel extending a predetermined thickness from the top surface toward a core of the bottom plate3. The fixture of claim 2 , wherein the recessed channel extends ...

CERAMIC FILTER WITH DIFFERENTIAL CONDUCTIVITY

The present application is directed to a filter and methods of making the same. The filter includes a block of dielectric material with a top surface including a patterned region, a bottom surface, and side surfaces. The filter also includes a through-hole extending through the block from the top surface to the bottom surface. The through-hole is partially surrounded by the patterned region, The filter also includes a wall extending from the top surface, the wall having an inner surface, an outer surface, and a roof. The bottom surface, side surfaces, outer surface, and roof have a first coating including glass frit. The patterned region, through-hole and inner surface have a second coating including glass frit. The glass frit in the first coating is at least 0.5% greater than the glass frit in the second coating. The application is also directed to a system including a printed circuit board and a filter. 1. A filter comprising:a block of dielectric material with a top surface including a patterned region, a bottom surface, and side surfaces;a through-hole extending through the block from the top surface to the bottom surface, the through-hole being partially surrounded by the patterned region; anda wall extending from the top surface, the wall having an inner surface, an outer surface, and a roof, whereinthe bottom surface, side surfaces, outer surface, and roof have a first coating including glass frit,the patterned region, through-hole and inner surface have a second coating including glass frit, andthe glass frit in the first coating is at least 0.5% greater than the glass frit in the second coating.2. The filter of claim 1 , wherein the glass frit in the first coating is at least 1% greater than the glass frit in the second coating.3. The filter of claim 2 , wherein the glass frit in the first coating is at least 1.5% greater than the glass frit in the second coating.4. The filter of claim 1 , wherein the wall extends along a perimeter of the top surface.5. The ...

Duplex Filter with Recessed Top Pattern Cavity

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.

Ceramic monoblock filter with metallization pattern providing increased power load handling

A ceramic monoblock filter incorporating a top face input/output port metallization pattern defining an input/output transmission line, a power load distribution bar, and a ground plate. The transmission line, power load distribution bar, and ground plate are all positioned and oriented relative to each other and two of the resonators defining the filter to define load splitting capacitors providing increased power load handling characteristics.

Rf monoblock filter with recessed top pattern and cavity providing improved attenuation

An electrical signal filter defined by a block of dielectric material with top, bottom, and side surfaces, and through-holes extending between the top and bottom surfaces. In one embodiment, a plurality of walls extend outwardly from the top surface to define a peripheral rim and filter cavity. A pattern of metallized and unmetallized areas is defined on selected surfaces of the block including an area of metallization covering a portion of the top surface and at least one of the walls to define at least one input/output electrode on the wall. In one embodiment, a pair of input/output electrodes are formed on a pair of posts defined on one of the walls and the filter is adapted for mounting to a printed circuit board with the rim of the walls against the board and the posts coupled to respective input/output pads on the board.

Aerodynamic lead-free throw weight with screw-on anchors and topping up option.

Flexibel loodvrij werpgewicht.

Elastic rubber strip for aerodynamical application to casting weights

Casting weight for use in the fishery, more in particular for use in the fishing-sport and the angling- sport, characterized in that is has all round been provided with a groove (6), the longitudinal direction of which runs at right angles to the longitudinal direction of the casting weight, whereby the groove is provided all round the casting weight at the point where the diameter of the casting weight is the largest, while in the groove a ring shaped elastic strip (2, 3, 4) can be placed that is provided with a profile, for instance a profile provided with a zigzag pattern.

Toepassing van geintregeerde wartel met of zonder draadoog in werpgewichten van metalen met een hoog smeltpunt.

Elastische rubberstrip voor aerodynamische toepassing op werpgewichten.

Elastic rubber strip for aerodynamical application to casting weights

Casting weight for use in the fishery, more in particular for use in the fishing-sport and the angling- sport, characterized in that is has all round been provided with a groove (6), the longitudinal direction of which runs at right angles to the longitudinal direction of the casting weight, whereby the groove is provided all round the casting weight at the point where the diameter of the casting weight is the largest, while in the groove a ring shaped elastic strip (2, 3, 4) can be placed that is provided with a profile, for instance a profile provided with a zigzag pattern.

Toepassing van geintregeerde wartel met of zonder draadoog in werpgewichten van metalen met een hoog smeltpunt.

Bracket for RF monoblock filter and filter-PCB assembly incorporating the same

A combination RF filter and printed circuit board assembly wherein the RF filter is defined by a block of dielectric material including at least first and second side surfaces. A metal bracket with a plurality of fingers is secured to each of the first and second side surfaces. The fingers on the brackets extend through respective apertures in the printed circuit board and are soldered to the printed circuit board. The brackets relieve and transfer the thermal and mechanical stresses that result from use of a filter and printed circuit board that are made of materials with different thermal and mechanical characteristics and reduce the risk of cracking or damage to the filter, the printed circuit board, and the solder joints during use.