High performance data cable

A data cable, high-performance technology, applied in communication cables, insulated cables, cable/conductor manufacturing, etc., can solve the problems of uneven attenuation, inability to adhere closely, and poor impedance value, etc., and achieve good impedance control effect
CN1367930AInactive Publication Date: 2002-09-04BELDEN WIRE & CABLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BELDEN WIRE & CABLE
Publication Date
2002-09-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

An improved high performance twisted pair data cable having a calculated impedance standard deviation of less than 3.5 at an average impedance of 50 to 200 ohms and a maximum of 90 to 110 ohms. The twisted pair is helically wrapped with metal shielding tape under a certain tension, which provides a shielded twisted pair with a cross-sectional void of less than 25%, preferably less than 18%. The tape is helically wrapped with an overlap of 30-45% and at 35-45 degrees to the longitudinal axis of the cable. This cable has a frequency up to 600MHz.
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Description

technical field

[0001] The present invention relates to a high performance data cable capable of successfully transmitting in the frequency range from 0.3 MHz to 600 MHz. In particular, the present invention provides a helically shielded twisted pair having an impedance standard deviation of 3.5 or less at an average impedance of about 50 to 200 ohms. In addition, the present invention provides a high performance data cable comprising several pairs of helically shielded twisted wires and having an average standard deviation of 3.5 or less, with no single standard deviation greater than 4.5 for all cables. Background technique

[0002] Existing high-performance data cables can often use heavy, rigid 2-mil aluminum tape backed with 1-mil polyester (Mylar) as the shield. The shield is wrapped around each unshielded pair subset in a wrap length equal to the overall lay length of the cable, typically 4.0 to 6.0 inches in wrap length. The strip is approximately 0.5 inches wide. ...

Claims

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