Coaxial cable with low-loss shielding layer

Abstract

The invention relates to a coaxial cable with low-loss shielding layer. An intermediate copper conductor employs a hollow copper pipe structure, a silver plating layer is arranged on a surface of a hollow copper pipe, the AC resistance is reduced, the total weight of the cable is reduced, and the cost is reduced; a PTFE high-temperature material is foamed to form a foamed insulation layer, a plurality of insulation air tubes which are longitudinally arranged and encircle the intermediate copper conductor are formed by a longitudinal hole technology during foaming, the air rate of the foamed insulation layer is improved by the insulation air pipe, and the cooling passage and the cooling area are expanded; a silver plating copper strip is arranged outside the foamed insulation layer and forms a metal wrapping layer, a silver plating copper wire weaving shielding layer is employed, the shielding effect is improved, the cable loss is reduced, the interference-resistant capability is improved, and the transmission performance is stable; an outer sheath wear-resistant layer of a TPU polyurethane material at the outmost part has the performance of high wear resistance, low-temperature resistance and oil resistance, and the service lifetime of the cable is prolonged.

Description

technical field [0001] The present invention relates to a coaxial cable with a low loss shield. Background technique [0002] A coaxial cable is generally composed of an outer insulating layer, a central conductor, an intermediate insulating layer, and an outer conductor or a shielding layer. The central conductor and the outer conductor form a current loop to transmit signals, and the intermediate insulating layer between the central conductor and the outer conductor ensures stable signal transmission. The stability of signal transmission is proportional to the air rate of the intermediate insulating layer. The higher the air rate of the intermediate insulating layer, the better the signal transmission stability. The intermediate insulating layer in the prior art generally uses foaming materials, of which 70% It is air, but the air rate of the foam material will cause loss during use, which will cause the transmission signal to attenuate, and the coaxial cable itself will a...

AI Technical Summary

Problems solved by technology

[0002] A coaxial cable is generally composed of an outer insulating layer, a central conductor, an intermediate insulating layer, and an outer conductor or a shielding layer. The central conductor and the outer conductor form a current loop to transmit signals, and the intermediate insulating layer between the central conductor and the outer conductor ensures stable signal transmission. The stability of signal transmission is proportional to the air rate of the intermediate insulating layer. The higher the air rate of the intermediate insulating layer, the better the signal transmission stability. The intermediate insulating layer in the prior art generally uses foaming materials, of which 70% It is air, but the air rate of the foam material will cause loss during use, which will cause the transmission signal to attenuate, and the coaxial cable itself will also increase the loss due to heat and other reasons during signal transmission

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