RFI shielding gasket

Details RFI shielding gasket RFI shielding gasket

1988-07-15

1989-12-26

Nimmo, Morris H.

Electricity: conductors and insulators

Anti-inductive structures

Conductor transposition

439 91, 439 95, 439108, 439609, H05K 900

Patent

active

048899593

ABSTRACT:
The connection and shielding system for modular RF circuits encases modular circuitboards (10) within five-sided enclosures (11). The sixth side of each enclosure is provided by the top ground plane of a base circuitboard (20) that supports and electrically interconnects the components of the modular circuitboards (10). Enclosures (11) are fixed to a grounded metal socket formed by fence strips (22) and metal inserts (23) which form upwardly open slots including yieldable longitudinal gaskets (50). Gaskets (50) yieldably grip the open end of enclosures (11) and seal them against escaping radiation. Further radiation shielding is provided about the base circuitboard (20) by the fact that the conductive signal traces provided in it are sandwiched between two continuous ground planes and run between plated-through vias joining the ground planes. The ends of each enclosure are provided with double wall baffles (17, 18) which provide airflow to the interior and RFI shielding through offset open apertures (13).

REFERENCES:
patent: 2825042 (1958-02-01), Tollefson et al.
patent: 3539973 (1970-11-01), Antes et al.
patent: 3885084 (1975-05-01), Kaiserswerth et al.
patent: 4389080 (1983-06-01), Clark et al.
patent: 4632476 (1986-12-01), Schell

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