Wave transmission lines and networks – Transmission line inductive or radiation interference...
Patent
1979-05-11
1981-05-12
Gensler, Paul L.
Wave transmission lines and networks
Transmission line inductive or radiation interference...
333185, 358 36, 361330, 455307, 455310, H03H 701, H04B 110, H04N 521
Patent
active
042675286
ABSTRACT:
Apparatus is provided for suppressing radio frequency interference radiation at a circuit connection point. The apparatus includes a capacitor having first and second terminals, the first of which is coupled to a substantially planar plate of the capacitor. The first terminal is coupled to the circuit connection point, which may otherwise act as an RFI antenna. The second capacitor terminal is coupled to a point of reference potential for radio frequencies. The capacitor is oriented when mounted so that the planar plate opposes and is substantially parallel to a metallic surface which is at the radio frequency reference potential (e.g., ground). The capacitor suppresses RFI radiation from the circuit connection point by conducting a portion of the RFI energy at that point to the point of RFI reference potential by way of the first terminal, the body of the capacitor, and the second terminal. A second portion of the RFI energy at the circuit connection point is radiated from the planar plate of the capacitor to the opposed metallic surface.
REFERENCES:
patent: 2355182 (1944-08-01), Shoup
patent: 2935639 (1960-05-01), Mothiron
patent: 4096516 (1978-06-01), Pritchard
patent: 4122416 (1978-10-01), Oblak et al.
Gensler Paul L.
Meagher W. H.
RCA Corporation
Whitacre E. M.
Yorks, Jr. W. B.
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