High-density pass-through filter apparatus
View Patent ↗A high-density pass-through filter apparatus slips over the terminal blade of a standard pass-through electrical connector within an opening in the bulkhead of an electronic module to which the connector is fastened. The filter apparatus retains a large number of axially oriented and axially terminated capacitive filter components which are electrically coupled at one end to the connector terminal and at the other end to a peripheral ring that resiliently engages the periphery of the bulkhead opening.
1. Filter apparatus for an electrical connector including a terminal blade that passes through an opening in a bulkhead of an electronic module, the filter apparatus comprising:
an insulative base plate slidingly mounted on the terminal blade within the bulkhead opening, the base plate having a plurality of axial though-holes in which are received a plurality of axially oriented and axially terminated capacitive filter components;
a first contactor mounted on a first axial face of the base plate for electrically coupling the terminal blade of the connector to a first axial end of each capacitive filter component; and
a second contactor mounted on a second axial face of the base plate opposite said first axial face for electrically coupling a periphery of the bulkhead opening to a second axial end of each capacitive filter component.
2. The filter apparatus of claim 1 , where:
the base plate includes a central axial through-hole in which the terminal of said connector is received; and
the first contactor includes an array of conductive prongs that extend axially into the central axial through-hole of said base plate and electrically contact said terminal blade.
3. The filter apparatus of claim 1 , where:
the second contactor includes an array of peripheral prongs that extend axially along an outer periphery of said base plate and electrically contact the periphery of said bulkhead opening.
4. The filter apparatus of claim 1 , further comprising:
a first conductive pad disposed between said first contactor and said base plate for establishing electrical conduction between said first contactor and the first axial ends of said capacitive filter components.
5. The filter apparatus of claim 4 , where:
the first conductive pad is formed of conductive foam.
6. The filter apparatus of claim 4 , where:
the first conductive pad is formed of a dispensed conductive material.
7. The filter apparatus of claim 4 , where:
said insulative base plate includes a raised shoulder peripherally surrounding the first conductive pad and the first contactor.
8. The filter apparatus of claim 1 , further comprising:
a second conductive pad disposed between said second contactor and said base plate for establishing electrical conduction between said second contactor and the second axial ends of said capacitive filter components.
9. The filter apparatus of claim 8 , where:
the second conductive pad is formed of conductive foam.
10. The filter apparatus of claim 8 , where:
the second conductive pad is formed of a dispensed conductive material.
11. The filter apparatus of claim 8 , where:
said insulative base plate includes a raised shoulder peripherally surrounding the second conductive pad.