RF shield for circuit card having a solid first flange

Details RF shield for circuit card having a solid first flange RF shield for circuit card having a solid first flange

1995-12-06

1998-06-30

Picard, Leo P.

Electricity: electrical systems and devices

Housing or mounting assemblies with diverse electrical...

For electronic systems and devices

361816, 361818, 361799, 361791, 174 51, H05K 714

Patent

active

057743444

ABSTRACT:
A metallized plastic RFI/EMI shield is provided against electromagnetic energy for a circuit card wherein the shield is formed of a box enclosure with two casing halves to enclose the card, the first casing half having a solid flange side walls surrounding the card and the second casing half having a flange formed by flat, plate-like closely-spaced fingers, the fingers confronting, being in electrical contact with and mating in full length with substantially the entire periphery of the side walls of the first casing half. The fingers are preferably spaced with a separation of less than 1/4 wavelength of any measurable harmonic of the intended operating frequency, typically up to the tenth harmonic. A slot may be provided to receive the fingers on the outside of the side walls, and closely-spaced grounding pins arranged around the periphery of the card may extend between the first and second casing halves through ground plated perforations along the edge of the side walls.

REFERENCES:
patent: 3721746 (1973-03-01), Knappenberger
patent: 4754101 (1988-06-01), Stickney et al.
patent: 5095177 (1992-03-01), Johnson
patent: 5160807 (1992-11-01), Fry et al.
patent: 5175395 (1992-12-01), Moore
patent: 5354951 (1994-10-01), Lange, Sr. et al.

Affiliated with

Also associated with

Rating

RF shield for circuit card having a solid first flange does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with RF shield for circuit card having a solid first flange, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and RF shield for circuit card having a solid first flange will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1866573