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Leaky cable

A technology of leaky cables and slots, applied in leaky waveguide antennas, electrical components, circuits, etc., can solve problems such as large coupling loss and incompatible transmission

Pending Publication Date: 2021-09-17
ZHONGTIAN RADIO FREQUENCY CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the above-mentioned leaky cable has a large coupling loss for lower frequency signals such as 2G signals in the slot near the source end, and cannot be compatible with 2G, 3G, 4G and 5G signals.

Method used

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Embodiment Construction

[0040]Usually, the slot hole close to the signal source (signal source) of the leaky cable has a large coupling loss and a small transmission loss, and the slot far away from the signal source has a small coupling loss and a large transmission loss. By setting the coupling loss of the slot close to the signal source to be larger, energy waste caused by the coupling performance of the slot close to the signal source is avoided. And the coupling loss of the slot far away from the source end is small, which improves the signal leakage of the slot far away from the source end, improves the signal strength of the leak away from the slot at the source end, and then improves the performance of trains and high-speed rails far away from the source. The strength of the electromagnetic wave signal received in the tunnel at the end. When designing a leaky cable, it is generally considered that the higher-frequency signals such as 5G transmitted from the slot can be received by the externa...

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Abstract

The invention provides a leaky cable, relates to the technical field of communication cables, and the technical problem that the leaky cable cannot compatibly transmit 2G, 3G, 4G and 5G signals can be solved. The leaky cable comprises an outer conductor, wherein the outer conductor is provided with an information source end; the outer conductor comprises a plurality of segments, and each segment is provided with a plurality of slotted holes; in the multiple segments, the segment closest to the information source end is the first segment, and when the frequency of the signal output by the slotted hole of the first segment is gradually increased from the first set frequency to the second set frequency, the variable quantity of the coupling loss of the slotted hole of the first segment is smaller than or equal to a preset difference value. The leaky cable provided by the invention is used for realizing compatible transmission of 2G, 3G, 4G and 5G signals.

Description

technical field [0001] The invention relates to the field of communication cables, in particular to a leaky cable. Background technique [0002] Leaky cables are usually used in tunnels and buildings to provide reliable electromagnetic wave signals. However, in train tunnels and high-speed rail tunnels, the strength of electromagnetic wave signals received in trains and high-speed rails is weak due to too much loss when electromagnetic waves pass through the bodies of trains and high-speed rails. Therefore, it is necessary to improve the structure of the leaky cable to increase the strength of the electromagnetic wave signal received by the train and the high-speed rail in the tunnel. [0003] Generally, different slots are opened on different lengths of the outer conductor of the leaky cable to improve the strength of the electromagnetic wave signal received by the train and high-speed rail in the tunnel. Specifically, the coupling loss of the slot near the signal source (...

Claims

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Application Information

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IPC IPC(8): H01Q13/20
CPCH01Q13/203
Inventor 林垄龙赵瑞静王斌缪艳华徐彬彬许波华徐宗铭
Owner ZHONGTIAN RADIO FREQUENCY CABLE CO LTD
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