Tubular woven controlled impedance cable

• US 4,504,696 A
• Filed: 04/04/1983
• Issued: 03/12/1985
• Est. Priority Date: 04/04/1983
• Status: Expired due to Fees

• Current Assignee: Sandoz Inc. (Novartis Ag)
• Original Assignee: Woven Electronics Corporation
• Inventors: Piper, Douglas E.
• Primary Examiner(s): Grimley, A. T.
• Assistant Examiner(s): Nimmo, Morris H.
• Application Number:
  US06/481,755
• Time in Patent Office: 708 Days
• Field of Search: 174/32, 174/34, 174/115, 174/117 M, 174/113 AS, 174/117 AS, 87/9, 156/47
• US Class Current: 174/32
• CPC Class Codes: H01B 11/12 Arrangements for exhibiting specific transmission characteristics
• CPC Class Codes: H01B 7/083 Parallel wires, incorporated in a fabric

Abstract

A woven electrical transmission cable is disclosed having a controlled impedance and reduced signal interference characteristic in which the density of the signal conductors may be increased without widening the configuration of the cable. The cable (A, F, K) is woven in a tubular configuration wherein the signal conductors (10, 30, 34) are arranged and woven about the periphery of the cable with a vertical spacing component between the conductors. The signal conductors are arranged with ground conductors (12, 32, 36) on each side thereof in the form of clusters (D, E, G, H) in strata about the periphery of the cable. In a preferred form the cable (F, K) is woven in a flattened oval configuration wherein the clusters of conductors are arranged in spaced layers which are generally parallel. In practice, noisy lines and quiet lines may be placed in opposed layers for maximum reduction of signal interference.

Claims

1. A woven tubular controlled impedance electrical transmission cable comprising:

a number of warp elements which include a plurality of signal conductors for transmitting high-frequency electrical signals extending in a warp direction and a ground conductor extending in the warp direction on each side of each said signal conductor, each said signal conductor and ground conductors on the sides of the signal conductor defining a cluster of warp conductor elements whereby a plurality of said clusters are formed in said cable;

a continuous weft element woven with said warp elements to define a tubular woven cable having an open interior, said signal conductors being arranged around a periphery of said open interior of said cable so that a vertical component of spacing is provided between said signal conductors;

said ground wires isolating next adjacent signal wires from one another laterally while said vertical displacement isolates said signal conductors vertically from one another;

said signal conductors being woven with said weft element so as to have an undulating configuration woven along the length of said cable;

said vertically displaced signal conductors undulating with respect to each other to provide a non-parallel relationship between said signal conductors reducing signal interference therebetween; and

said weft element being woven continuously through said clusters of warp conductors to provide continuously woven tubular woven fabric and cable around the entire periphery of said cable;

whereby said signal conductors are isolated laterally and vertically to effectively isolate said signal conductors from signal interference from one another and provide a controlled impedance cable characteristic.

2. The cable of claim 1 wherein said cable has an elongated tubular oval configuration, said clusters being arranged in two layers generally parallel with one another, and said weft element providing rounded edges connecting said layers.

3. The cable of claim 2 wherein said layers are bound together by binder means maintaining said layers and conductors therein in fixed proximity to one another.

4. A woven tubular controlled impedance electrical transmission cable comprising:

a first warp strata including a number of warp elements which include a plurality of signal conductors extending in a warp direction and a ground conductor extending in the warp direction on each side of each said signal conductor;

a second warp strata including a number of warp elements which include a plurality of signal conductors extending in the warp direction and a ground conductor extending in the warp direction on each side of said signal conductor;

said signal conductors of said first strata having a vertical displacement from said signal conductors of said second strata;

said ground wires isolating next adjacent signal wires from one another laterally while said vertical displacement isolates said signal conductors vertically from one another;

a weft element woven with said warp elements of said first strata to form an upper woven cable structure, said signal conductors of said first strata being woven with said weft element so as to have an undulating configuration woven along the length of said upper cable structure;

said weft element being woven with said warp elements of said second strata to form lower woven cable structure;

said signal conductors of said second strata being woven with said weft elements so as to have an undulating configuration along the length of said lower cable structure;

said vertically displaced signal conductors of each said strata undulating with respect to each other to provide a non-parallel relationship between said signal conductors of each said strata reducing signal interference therebetween; and

said weft element being woven continuously through said upper and lower cable structures to provide continuously woven tubular woven fabric and cable around the entire periphery of said cable;

whereby said signal conductors are isolated laterally and vertically to effectively isolate said signal conductors from signal interference from one another and provide a controlled impedance cable characteristic.

5. The cable of claim 4 wherein said upper and lower cable structures are woven together in a tubular generally round configuration.

6. The cable of claim 4 wherein said upper and lower cable structures are woven together in a tubular generally oval configuration.

7. The cable of claim 6 wherein said upper and lower cable structures are bound together by means of a warp binder means physically interconnecting said first and second strata for flattening said oval cable producing a generally flat cable wherein said strata are generally formed as two parallel layers and said weft element is woven as rounded edges.

8. A method of weaving a controlled impedance electrical transmission cable to provide lateral and vertical displacement between signal conductors extending longitudinally in said cable comprising:

providing a plurality of warp elements including a number of warp conductor elements;

arranging said warp conductor elements in clusters, each said cluster including a signal conductor for transmitting high-frequency electrical signals and a ground conductor on each side of said signal conductor;

providing a weft element;

weaving said weft element with said warp elements to define a tubular woven cable having an open interior with said clusters arranged around a periphery of said open cable interior so that said arrangement about said periphery provides a vertical component of spacing between signal conductors of said clusters; and

weaving said signal conductors with said weft element in an undulating manner so that corresponding signal conductors in opposing relation around said periphery have a non-parallel relation reducing noise producing fields therebetween preserving signal integrity.