High-isolation triple-coaxial leaky coaxial cable

Abstract

The invention provides a high-isolation triple-coaxial leaky coaxial cable. The isolating performance of the cable is excellent and the original main radiation signal is enhanced, so that the same-row wiring distance between leaky cables can be shortened substantially; and thus leaky cables can be distributed in a limited space area, so that the area meets the signal coverage requirement. The provided leaky coaxial cable comprises an inner conductor, an inner insulation layer, an inner-layer outer conductor, an outer insulation layer and a sheath successively from the center to the outer ring surface and is characterized in that a gap notch is formed in the inner-layer outer conductor and the gap radian alpha formed by the gap notch is 0 to 0.5 pi, wherein the gap radian alpha decreases with increasing of an optimal operating frequency; and an outer-layer outer conductor is arranged at an outer ring position corresponding to the gap notch, wherein the outer-layer outer conductor is a piece of arc metal. The corresponding center axes of the outer-layer outer conductor, the inner-layer outer conductor, and the inner conductor are overlapped. The outer-layer outer conductor is arranged at the outer side of the inner-layer outer conductor; and the arc radian beta of the outer-layer outer conductor is larger than the gap radian alpha.

Description

technical field [0001] The invention relates to the technical field of cable structures, in particular to a high-isolation triaxial leaky coaxial cable. Background technique [0002] Regarding wireless signal coverage in the field of wireless communication, in tunnels, elevators, mines and other strip-shaped narrow and long distribution areas, as well as in fully shielded or semi-shielded areas such as metal buildings, the coverage area is limited by the geographical environment and electromagnetic environment. , there will inevitably be signal weak areas and blind areas. For these areas where the normal method cannot meet the signal coverage requirements, it is necessary to use leaky cables and antennas for signal coverage. Among them, it is best to use leaky cables in confined and long spaces. choose. However, due to the wide variety of wireless communication systems today, wireless coverage in many areas is limited due to the limited space in the wiring area, and leaky c...

AI Technical Summary

Problems solved by technology

At the same time, the leaky coaxial cable provided has the characteristics of wide-band uniform radiation, and the widest use frequency range is 5MHz~3000MHz, which provides convenience for multiple systems to share the leaky cable, and solves the problem faced when multiple systems combine circuits and share one leaky cable. The spread spectrum problem of multi-frequency point multi-system access, the problem of high and low frequency unilateral coverage distance difference, the interference of multi-signal counterparts, the problem of crosstalk and the deterioration of signal caused by dense wiring

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