Polyethylene insulated flexible radio-frequency cable

Abstract

The invention relates to a polyethylene insulated flexible radio-frequency cable, belonging to the technical field of cables. The polyethylene insulated flexible radio-frequency cable is composed of an inner conductor, an insulating layer, an outer conductor and a sheath in sequence from inside to outside, wherein the inner conductor is made of 27 silver-plated copper stranded bundles each of which the diameter is 0.127mm; the insulating layer is a skin-foam-skin insulating layer which is foamed by adopting a physical foaming technology, wherein the outer diameter of the insulating layer is 2.4mm; the outer conductor is a silver plated flat wire or silver plated single-wire braided shielding layer; a polyethylene insulating layer is extruded on the inner conductor made of the silver-plated copper stranded bundles; the outer conductor, namely the silver plated flat wire or silver plated single-wire braided shielding layer, is braided on the polyethylene insulating layer; and the polyethylene sheath is extruded on the outer conductor, wherein the diameter of the sheath is 4.1mm. The polyethylene insulated flexible radio-frequency cable disclosed by the invention is reasonable in structure, ensures the electrical performance of the cable, improves the strength of the insulating layer and has the function of preventing water and moisture from intruding into the intermediate foaming layer. The fluctuation of a capacitor is controlled in a tiny tolerance range, the voltage standing wave rate is low, so that the impedance of an exchange network is more matched and the high-quality transmission of high-frequency signals is achieved.

Description

technical field [0001] The invention relates to a cable, in particular to a structure of a radio frequency cable used for transmitting data and analog signals in a coaxial optical fiber hybrid network, and belongs to the technical field of cables. Background technique [0002] Radio frequency cables are cables that transmit electromagnetic energy in the radio frequency range. Radio frequency cables are indispensable components in various radio communication systems and electronic equipment, and are widely used in wireless communication and broadcasting, television, radar, navigation, computers and instruments. Among them, coaxial cables are the most widely used, which are mainly used as antenna feeders for radio transmitting or receiving equipment, and internal or interconnected cables for various communications and electronic equipment. The basic structure of the existing coaxial radio frequency cable consists of a coaxial inner conductor, an insulating layer, a braided lay...

AI Technical Summary

Problems solved by technology

However, in modern coaxial radio frequency cables, the degree of foaming is increasing, and the foam insulation uses carbon dioxide foaming, which reduces the solid material of the foam insulation, reduces the strength, and the insulator is easily damaged, so the transmission quality and efficiency are low, and the transmission loss is large. Poor shielding and anti-interference, especially the electrical performance of communication cables is easily affected by environmental and climatic conditions, which limits the scope of use and cannot be used in the high frequency range

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