RFI shield for an IR input circuit

Details RFI shield for an IR input circuit RFI shield for an IR input circuit

1979-10-29

1981-04-14

Gensler, Paul L.

Telecommunications

Receiver or analog modulated signal frequency converter

Signal selection based on frequency

333 12, 350 11, 350319, 250338, 455300, 455619, H04B 110

Patent

active

042623650

ABSTRACT:
A thin metal RFI (radio frequency interference) shield for an IR (infra-red) input circuit including an IR transducer for a remote control receiver has slot-like apertures with louver-like members formed by twisting the metal between the slot-like apertures substantially 90.degree. with respect to the surface of the housing. The louvers compensate for the absence of shielding material in the apertures and thereby improve the RFI shielding effectiveness of the shield. The louver-like members also have been found to expand the field of reception or field of the remote control receiver by reflecting IR radiation coming from sideward positions into the IR transducer.

REFERENCES:
patent: 2366224 (1945-01-01), Warp
patent: 2442909 (1949-12-01), Warp
Terman, Measurements in Radio Engineering, McGraw-Hill, 1935, p. 342, FIG. 187.

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