Shielded radio frequency transmission cable
First Claim
1. A cable for radio-frequency transmission comprising at least one center conductor, a dielectric surrounding said conductor, and at least two generally concentric separated inner and outer metallic sheaths defining an outer transmission path therebetween having a first propagation function,said center conductor and said inner metallic sheath defining an inner transmission path therebetween having a second propagation function,said first propagation function being significantly greater than twice said second propagation function to significantly attenuate radiation from said cable.
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Accused Products
Abstract
The subject invention is directed to a cable comprising at least one center conductor, a dielectric surrounding said conductor and a plurality of metallic sheaths with at least two of said metallic sheaths separated, having a high series impedance and high propagation function for the path between said separated metallic sheaths. Said metallic sheaths are disposed in coaxial relationship to said at least one center conductor along the length of said cable. The cable design improves the shielding, suppression of EMI and RFI interference and minimizes the number and/or cost of the metallic sheaths required to obtain desired shielding.
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Citations
21 Claims
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1. A cable for radio-frequency transmission comprising at least one center conductor, a dielectric surrounding said conductor, and at least two generally concentric separated inner and outer metallic sheaths defining an outer transmission path therebetween having a first propagation function,
said center conductor and said inner metallic sheath defining an inner transmission path therebetween having a second propagation function, said first propagation function being significantly greater than twice said second propagation function to significantly attenuate radiation from said cable.
- 12. A triaxial cable for radio frequency transmission comprising a cylindrical center conductor, a cylindrical dielectric surrounding said center conductor, an inner metallic sheath disposed along said dielectric in coaxial relation to said center conductor defining an inner transmission path therebetween having a second propagation function, an intermediate dielectric surrounding said inner metallic sheath, and an outer metallic sheath disposed along said intermediate dielectric layer in coaxial relation to said center conductor, said cable having a triaxial path between said sheaths having a first propagation function significantly greater than twice said second propagation function to significantly attenuate radiation from said cable.
Specification