Hitachi, Ltd. : "Multipair Differential Signal Transmission Cable" in Patent Application Approval Process

By a News Reporter-Staff News Editor at Electronics Newsweekly -- A patent application by the inventors NONEN, Hideki (Hitachi, JP); SUGIYAMA, Takahiro (Hitachi, JP), filed on March 5, 2013, was made available online on December 26, 2013, according to news reporting originating from Washington, D.C., by VerticalNews correspondents.

This patent application is assigned to Hitachi Cable, Ltd.

The following quote was obtained by the news editors from the background information supplied by the inventors: "The invention relates to a multipair differential signal transmission cable.

"A multipair differential signal transmission cable is known that is formed by bundling plural differential signal transmission cables (see, e.g., JP-A-2004-087189).

"JP-A-2004-087189 (FIGS. 2 and 6) discloses an assembled transmission cable (a multipair differential signal transmission cable) formed by assembling plural transmission cables (differential signal transmission cables) each having a signal line pair as a pair of insulated wires each composed of a signal line covered with an insulation layer, a drain wire, a shield material covering the pair of signal lines as well as the drain wire and a cushioning material covering an outer periphery of the shield material."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventors' summary information for this patent application: "The multipair differential signal transmission cable disclosed in JP-A-2004-087189 has a problem that quality of signal deteriorates due to pair-to-pair crosstalk.

"The pair-to-pair crosstalk is caused by transmission of electromagnetic energy from a differential signal transmission cable not contributing to signal transmission (hereinafter, referred to as 'Agressor') to a differential signal transmission cable contributing to signal transmission (hereinafter, referred to as 'Victim'). The transmission of electromagnetic energy is induced mainly by a common-mode component of which electric field spreads widely.


2014/01/03 09:07:08 Source：4-traders

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