Circular leaky waveguide cable

Abstract

The invention provides a circular leaky waveguide cable which comprises a circular waveguide wall and a metal wire and is characterized in that the metal wire is additionally arranged on a circular waveguide inner cavity along the axis direction of the circular waveguide inner cavity, and a plurality of gaps are uniformly arranged on the circular waveguide wall along the axis direction at intervals to form a gap array. The invention can be applied to high-frequency, microwave and high-power systems and realize that the polarized surface of a transmission wave field structure is not deflected with distance.

Description

technical field [0001] The invention relates to the technical field of communication cables, in particular to a circular leaky waveguide cable. Background technique [0002] At present, leaky coaxial cables are mainly used in tunnels, tunnels, underground railways, underground buildings and other environments where radio signals are poorly propagated. They can transmit the main energy and only radiate a small part within a certain range around the cable during transmission. Energy, forming a radio wave channel with limited radial range, can extend the range of radio waves with limited energy, thereby improving communication quality. [0003] The structure of a typical leaky coaxial cable is mainly composed of four parts: the inner conductor, the insulating layer, the outer conductor with slots and the sheath; in this way, as the transmission frequency increases, the inner conductor of the leaky coaxial cable and its filling The loss of the medium also increases accordingly;...

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Problems solved by technology

[0003] The structure of a typical leaky coaxial cable is mainly composed of four parts: the inner conductor, the insulating layer, the outer conductor with slots and the sheath; in this way, as the transmission frequency increases, the inner conductor of the leaky coaxial cable and its filling The loss of the medium also increases accordingly; at the same time, due to the limitation of the structure, the power capacity decreases, so the existing leaky coaxial cables are generally suitable for the decimeter wave band, such as the frequency band of 300M ~ 3000M

[0004] Aiming at the defect of the existing leaky coaxial cable, a circular waveguide is proposed, which can be applied to the transmission of the UHF band; however, since the circular waveguide has a magnetic field component in the propagation direction and no electric field component When the TE wave is used, when the processing of the circular waveguide is not perfect or there is a slight inhomogeneity in the circular waveguide, the polarization plane of the main wave type TE11 field structure is prone to rotation, which causes the radiation field along the waveguide Longitudinal distribution is uneven, so circular waveguides are generally not used for long-distance transmission of RF energy and signals

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