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US 5,393,928 AGranted
Shielded cable assemblies
AssigneeMonsanto Company
InventorsRichard M. Cribb, Arthur R. Henn, Martin H. Wohl
Life of this patent
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AssigneeMonsanto Company
InventorsRichard M. Cribb, Arthur R. Henn, Martin H. Wohl
Estimating the term…
Lower weight shielded cable assemblies with an enhanced level of shielding effectiveness, e.g. in the range of 0.1 MHz to 20 GHz, comprising a core of at least one insulated conductor element overwrapped with metallized fabric, e.g. characterized as having a surface resistivity less than 100 milliohms/square or as being a metallized fabric coated with at least a layer of copper having a metal density of greater than 50 grams/square meter. Cable assemblies can employ a shielding subassembly comprising braided wire and one or more layers of copper-metallized fabric where the shielding subassembly has a transfer impedance at 10 MHz of less than 50 mo/m. For example, it has been found that cable assemblies employing a four layer wrap of certain metallized fabrics can provide up to 20 decibels improvement in shielding effectiveness over a wide range of frequencies with a 74 percent reduction in weight compared to a standard wire braid/foil laminate shield.
An elongated shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric has a surface resistivity less than 100 milliohms/square.
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped with more than one layer of metallized fabric, wherein said fabric is coated with at least a layer of copper having a metal density of greater than 50 grams per square meter.
A shielded cable assembly comprising a core of at least one insulated conductor element overwrapped a shielding subassembly comprising braided wire exhibiting transfer-impedance of less than 50 milliohms/meter at 0.2 MHz and one or more layers of copper-metallized fabric selected so that the shielding subassembly has a transfer impedance at 10 MHz of less than 50 milliohms/meter.
Metallized fabric having at least one layer of metal on a fibrous substrate, said fabric being selected from the group consisting of (a) woven fabric having a surface resistivity less than 20 milliohms/square, (b) non-woven fabric having a surface resistivity less than 50 milliohms/square and (c) woven or non-woven fabric having at least one layer of copper and a metal density greater than 50 grams/square meter.
Dependencies are inferred from the claim text.