METHOD FOR CONNECTING DIFFERENTIAL TRANSMISSION CABLE, DIFFERENTIAL TRANSMISSION CABLE AND ELECTRIC DEVICE

• US 20150333450A1
• Filed: 11/22/2013
• Published: 11/19/2015
• Est. Priority Date: 12/12/2012
• Status: Active Grant

• Current Assignee: Nihon I/F K.K.
• Original Assignee: Hirakawa Hewtech Corporation, Nihon I/F K.K.
• Inventors: YAMADA, Akiyoshi, MARUYAMA, Masami, SAKAMOTO, Shinzo
• Granted Patent: US 9,728,904 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H01B 11/12 Arrangements for exhibiting specific transmission characteristics
• CPC Class Codes: H01B 11/1891 comprising auxiliary conductors
• CPC Class Codes: H01B 11/20 Cables having a multiplicity of coaxial lines
• CPC Class Codes: H01B 13/016 for manufacturing co-axial cables applying discontinuous insulation H01B13/20
• CPC Class Codes: H01R 13/6592 the conductive member being a shielded cable
• CPC Class Codes: H04B 3/28 Reducing interference caused by currents induced in cable sheathing or armouring
• CPC Class Codes: Y10T 29/49124 On flat or curved insulated base, e.g., printed circuit, etc.

Abstract

A method for connecting a differential transmission cable, (and a differential transmission cable and an electric device) includes: connecting a pair of conductors for transmitting a differential signal to transceivers; and connecting a second shield provided on the periphery of a first shield via an insulating layer to frame grounds, without electrically connecting anywhere the first shield that is provided on the periphery of the pair of conductors via a dielectric layer.

Claims

1. A method for connecting a differential transmission cable, comprising:

connecting a pair of conductors for transmitting a differential signal to a first contact point; and

connecting a second shield, provided on a periphery of a first shield via an insulating layer, to a second contact point in a state that the first shield provided on a periphery of the pair of conductors via a dielectric layer is not electrically connected to anywhere.

2. A method for connecting a differential transmission cable, comprising:

connecting a pair of conductors for transmitting a differential signal to a first contact point; and

connecting a second shield, provided on a periphery of a first shield via an insulating layer, to second contact points in a state that the first shield provided on the periphery of the pair of conductors via a dielectric layer and a drain wire in contact with the first shield are not electrically connected to anywhere.

3. A differential transmission cable, comprising:

a pair of conductors for transmitting a differential signal;

a first shield that is provided on a periphery of the pair of conductors via a dielectric layer and is not electrically connected to anywhere; and

a second shield provided on a periphery of the first shield via an insulating layer,

wherein common-mode impedance is controlled by selecting a material or a thickness of the insulating layer provided between the first shield and the second shield.

6. An electric device, comprising the differential transmission cable according to claim 3.

4. A differential transmission cable, comprising:

a cable main body comprising a pair of conductors for transmitting a differential signal, a first shield provided on a periphery of the pair of conductors via a dielectric layer, and a second shield provided on a periphery of the first shield via an insulating layer; and

a connector that comprises a signal terminal connected to the pair of conductors and a ground terminal connected to the second shield, and that is provided on at least one end portion of the cable main body such that the first shield is not electrically connected to anywhere.

7. An electric device, comprising the differential transmission cable according to claim 4.

5. A differential transmission cable, comprising:

a cable main body comprising a pair of conductors for transmitting a differential signal, a first shield provided on a periphery of the pair of conductors via a dielectric layer, a drain wire in contact with the first shield, and a second shield provided on a periphery of the first shield via an insulating layer; and

a connector that comprises a signal terminal connected to the pair of conductors and a ground terminal connected to the second shield, and that is provided on at least one end portion of the cable main body such that the first shield and the drain wire are not electrically connected to anywhere.

8. An electric device, comprising the differential transmission cable according to claim 5.