In high frequency screening of electrical systems
First Claim
1. In an annular electrically conductive screen having at least two annular electrically conductive screening paths, an interconnection between two parts of the screen, the interconnection comprising a region of at least one of the parts of the screen whereat the screen is physically divided to define a zone between the two annular paths, in which zone the two paths are physically separated, and an annulus of high permeability material disposed within said zone to reduce the magnetic reluctance of the magnetic path between said electrical paths, said annulus of high permeability material serving to partition a disturbing current so that substantially all of the current flows in that one of said paths which is closest to the disturbing signal.
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Accused Products
Abstract
An interconnection between screened cables and a method of interconnecting screened cables. It is calculated that reduction of magnetic reluctance of the magnetic path between inner and outer surfaces of the screen in the region of the interconnection decreases external interference to the screened cable and the interconnections are constructed to be in accordance with this calculation. Mu-metal can be used to reduce magnetic reluctance.
146 Citations
8 Claims
- 1. In an annular electrically conductive screen having at least two annular electrically conductive screening paths, an interconnection between two parts of the screen, the interconnection comprising a region of at least one of the parts of the screen whereat the screen is physically divided to define a zone between the two annular paths, in which zone the two paths are physically separated, and an annulus of high permeability material disposed within said zone to reduce the magnetic reluctance of the magnetic path between said electrical paths, said annulus of high permeability material serving to partition a disturbing current so that substantially all of the current flows in that one of said paths which is closest to the disturbing signal.
- 4. A method of electrically connecting the outer conductor of a screened co-axial cable to a co-axial connector or to a terminal, the method comprising making at least two connections between the outer conductor of the cable and the connector or component terminal and interposing between said at least two connections a magnetic toroid for reducing the magnetic reluctance between said at least two connections.
Specification