Electricity: conductors and insulators – Anti-inductive structures – Conductor transposition
Patent
1993-02-19
1995-02-28
Nimmo, Morris H.
Electricity: conductors and insulators
Anti-inductive structures
Conductor transposition
174 35R, 174117M, 174109, 428229, 428263, 428289, H01B 734, D03D 300, D04H 100
Patent
active
053939280
ABSTRACT:
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.
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Cribb Richard M.
Henn Arthur R.
Wohl Martin H.
Kelley Thomas E.
Monsanto Company
Nimmo Morris H.
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