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A solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable

A technology of coaxial radio frequency cable and polytetrafluoroethylene, which is applied in the field of wire and cable, can solve problems such as easy generation of noise, and achieve the effects of sufficient elasticity, excellent film-forming properties, and excellent adhesion

Active Publication Date: 2020-09-11
上海广茂特种线缆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem of easy noise generation proposed in the background technology, the first purpose of the present invention is to provide a solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable, by coating the surface of the insulating layer with a graphite coating, So as to achieve the purpose of low noise

Method used

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  • A solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable
  • A solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1: A solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable, including an inner conductor 1, an insulating layer 2, a braided outer conductor 3 and a sheath 4 arranged sequentially from the inside to the outside, the insulating layer 2 and the braided outer conductor A noise reduction layer 5 is provided between the conductors 3, and the noise reduction layer 5 is coated on the outer surface of the insulating layer 2, and the noise reduction layer 5 is made of graphite or a graphite mixed material. Each component and its corresponding parts by weight in the graphite mixed material are shown in Table 1.

Embodiment 2-8

[0045] Example 2-8: A solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable, the difference from Example 1 is that the components of the graphite mixed material and their corresponding parts by weight are shown in Table 1.

[0046] Table 1 Components and parts by weight of graphite mixed materials in Examples 1-8

[0047]

[0048] The whole low-noise coaxial radio frequency cable is prepared through the following steps:

[0049] Step 1: Melting the insulation layer, adding the material of the insulation layer to the twin-screw extruder, fully stirring and melting, and controlling the temperature of the barrel at 250-270°C;

[0050] Step 2: Coating the inner conductor, preheating the inner conductor first, the preheating temperature is 85-90°C, then extruding the insulating layer material in the barrel through the extruder, and coating the outer periphery of the inner conductor, and extruding Outlet temperature is 350~380℃;

[0051]Step 3: Water-c...

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Abstract

The invention relates to the technical field of wires and cables, discloses a solid polytetrafluoroethylene insulation low-noise coaxial radio frequency cable, and solves the technical problems that the current cable is easy to generate noise under the conditions of bending, vibration and conflict, and the transmission stability of the signals is poor. The cable comprises an inner conductor, an insulating layer, a braided outer conductor and a sheath which are sequentially arranged from inside to outside, wherein a noise reduction layer is arranged between the insulating layer and the braidedouter conductor; the noise reduction layer is coated on the outer surface of the insulating layer; and the noise reduction layer is made of graphite or graphite mixed materials. The surface of the insulating layer is coated with graphite coating used in transmission control, detection and communication high-frequency signals in a high-impedance weak signal system, so that the noise easily caused by bending, vibration and collision of the cable is reduced, the signal transmission is more stable, and the purpose of low noise is achieved.

Description

technical field [0001] The invention relates to the technical field of wires and cables, more specifically, it relates to a solid polytetrafluoroethylene insulated low-noise coaxial radio frequency cable. Background technique [0002] Coaxial RF cable refers to a cable with two concentric conductors, and the conductor and shield share the same axis. The insulation material of radio frequency coaxial cable is composed of physically foamed polyethylene isolated copper wire conductor of radio frequency coaxial cable series. Outside the inner layer of insulating material is another layer of ring conductor, that is, the outer conductor. The outer conductor (tissue shielding layer) is made of copper Ribbon forming, welding, tie-in; or aluminum tube structure; or braided structure, and then the entire cable is wrapped by a sheath of PVC material. [0003] The existing coaxial radio frequency cable is mainly composed of the following layers: 1-multiple steel strand inner conductors...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B11/10H01B11/18H01B13/016H01B13/22
CPCH01B11/1058H01B11/18H01B11/1834H01B13/016H01B13/225
Inventor 张亮张小菊
Owner 上海广茂特种线缆有限公司