Radio frequency shielding tape

Details Radio frequency shielding tape Radio frequency shielding tape

1989-02-23

1990-12-11

Picard, Leo P.

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

219 1055D, H05K 900

Patent

active

049772961

ABSTRACT:
A structure for attenuating the passage of electromagnetic energy includes at least two panels made of electromagnetic energy-attenuating material having adjacent edges thereof either abutting or overlapping one another to form a portion of an enclosure. A shielding tape defining transverse waveguide channels either straddles the seam between the two panels in the abutting mode, or is sandwiched between the overlapping edges of the panels in the overlapping mode. In either mode, the shielding tape operates not to create complete conductive continuity between the two panels at every point, as do previous tapes and techniques, but rather to define a multiplicity of small waveguides which are operating beyond cutoff, and are of such an impedance relative to the impedance of the incoming electromagnetic energy that in the frequency range in question, the energy is attenuated by the channel waveguides to levels 50 dB to greater than 100 dB.

REFERENCES:
patent: 3219747 (1965-11-01), McAdams

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