Radio-frequency low-loss thin coaxial cable

Abstract

The invention discloses a radio-frequency low-loss thin coaxial cable. An inner conductor formed by twisting multiple strands of silver-plated copper wires is arranged at the center of the cable. Multiple layers of low-density micropore polytetrafluoroethylene bands wrap the inner conductor to serve as insulating layers. A silver-plated flat copper band wraps the insulating layers to serve as an outer conductor. A layer of aluminum-plastic composite band wraps the outer conductor to serve as a signal reflecting layer. A layer of silver-plated round copper wire is woven outside the signal reflecting layer to serve as an electromagnetic radiation resistance layer. A protective sleeve layer formed by a piece of polyimide and polytetrafluoroethylene composite thin film wraps the electromagnetic radiation resistance layer. The cable has high high-temperature resistance, high low-temperature resistance and high electromagnetic radiation resistance, and is low in attenuation, small in outer diameter and light in weight. The cable can be used as a soft transmission feeder for radio equipment in a communication system, a tracking system, an alert system, a mobile base station system and other systems.

Description

technical field [0001] The invention relates to a radio-frequency low-loss thin coaxial cable, which belongs to the field of electric wires and cables. Background technique [0002] With the development of electronics and communication technology, the continuous improvement of weapon equipment system technology such as early warning aircraft phased array radar, mobile base station, satellite and missile monitoring, and other digital phase-sensitive electronic systems, the outer diameter of radio frequency low-loss thin coaxial cable , transmission loss and weight put forward new requirements, which has triggered people's research on how to reduce the outer diameter, weight and transmission loss, and the relationship between materials and manufacturing processes. Low-density microporous PTFE tape insulation has a small dielectric constant, which can effectively reduce transmission loss during signal transmission. Polyimide + PTFE composite film has superior electrical propert...

AI Technical Summary

Problems solved by technology

Low-density microporous PTFE tape insulation has a small dielectric constant, which can effectively reduce transmission loss during signal transmission. Polyimide + PTFE composite film has superior electrical properties and high mechanical strength. The density is low, and the nominal thickness of the film is only 0.03 mm, which can reduce the outer diameter of the cable and reduce the weight of the cable, but there are wrinkles during the wrapping process, because the cable has very high requirements for the uniformity and stability of the structure. Harsh, once wrinkled, the electrical signal will be greatly attenuated during transmission, and the outer diameter of the cable will be uneven. Therefore, good structural design, material selection and process control must be used to make the cable attenuation and outer diameter small to meet The need for electronic equipment

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