Signal transmission cable with a noise absorbing high loss magnetic film formed on a sheath of the cable
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United States of America Patent
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Mar 18, 2003
Grant Date -
Oct 18, 2001
app pub date -
Apr 3, 2001
filing date -
Apr 4, 2000
priority date (Note) -
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Abstract
A signal transmission cable (10) having a conductor portion for transmitting signals and an insulator sheath (14) covering the conductor portion, and a high loss magnetic film (15) [is] formed on at least one part of the outer surface of the insulator sheath. The high loss magnetic film has the maximum complex permeability .mu.'.sub.max in a frequency range of 0.1-10 gigahertz (GHz). An example of a magnetic composition of the high loss magnetic film is a M-X-Y magnetic composition wherein M is a metallic magnetic material selected from among Fe, Co, and/or Ni, X is an element or elements other than M and Y, and Y is F, N, and/or O, the M-X-Y magnetic composition having a sufficient concentration of M in the composition so that the M-X-Y magnetic compostion has a saturation magnetization of 35-80% of that of the metallic magnetic material M alone.
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