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A dual-polarized leaky waveguide

A leaky waveguide and dual-polarization technology, applied in waveguides, waveguide-type devices, circuits, etc., can solve problems affecting system engineering cost, limited laying space, and increased maintenance costs, so as to improve system channel capacity and reduce transmission loss , Improving the effect of communication quality

Active Publication Date: 2022-05-10
TONGHAO CABLE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the leaky waveguide is generally laid on the outside or inside of the track, the laying space is limited, and there are many difficulties in laying two leaky waveguides at the same time: 1. There is not enough laying space; 2. The construction is difficult; 3. The material cost and installation cost will increase. A substantial increase will affect the system engineering cost; 4. The maintenance cost will also increase; 5. It will also cause a lot of inconvenience to the line construction and maintenance of other departments

Method used

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  • A dual-polarized leaky waveguide
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Examples

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Embodiment 1

[0049] Such as figure 1 and figure 2 As shown, the dual-polarization leaky waveguide of the present invention includes a rectangular waveguide 1 and a pair of rectangular flanges 2, and the rectangular flanges 2 are respectively welded to the outer surfaces of the two ends of the rectangular waveguide 1 by argon arc welding or brazing process. As a whole, multiple rectangular waveguides 1 of the same or different lengths are connected by rectangular flanges 2 and fastening bolts to form the required length, and are laid on the inside or outside of the track for vehicle-to-ground wireless signal transmission.

[0050] The rectangular waveguide 1 of the present invention is made of high-conductivity copper, aluminum or aluminum alloy, and is formed by one-time drawing or extrusion process. The rectangular waveguide 1 includes two rectangular cavities arranged in parallel along the length direction, respectively The first waveguide cavity 3 and the second waveguide cavity 4, th...

Embodiment 2

[0058] Such as Figure 5 and Figure 6 As shown, the structure of the rectangular waveguide 1 and the rectangular flange 2 of this embodiment is exactly the same as that of the first embodiment, so the same parts use the numbers in the first embodiment, the difference lies in the generation of vertically polarized waves and horizontally polarized waves The shape of the leaky gap for the wave.

[0059] The first upper wide surface 301 of the first waveguide cavity 3 of the present invention is provided with leakage slits that generate vertically polarized waves, including a first leakage slit 9 and a second leakage slit 10, each of which includes a slit along the waveguide. A plurality of slits arranged at equal intervals along the length direction. The vertical distance between the first leakage slit 9 and the front narrow surface 303 is greater than the thickness of the front narrow surface 303, the vertical distance between the second leakage slit 10 and the first leakage ...

Embodiment 3

[0066] Such as Figure 9 and Figure 10 As shown, the structure of the rectangular waveguide 1 and the rectangular flange 2 of this embodiment is exactly the same as that of the first embodiment, so the same parts use the numbers in the first embodiment, the difference lies in the generation of vertically polarized waves and horizontally polarized waves The shape of the leaky gap for the wave.

[0067] The first upper wide surface 301 of the first waveguide cavity 3 of the present invention is provided with leakage slits that generate vertically polarized waves, including the first leakage slit 12-1 and the second leakage slit 12-2, each leakage slit Both include a plurality of slots arranged at equal intervals along the length direction of the waveguide. The vertical distance between the first drainage slit 12-1 and the front narrow surface 303 is greater than the thickness of the front narrow surface 303, and the vertical distance between the second drainage slit 12-2 and ...

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Abstract

The invention discloses a dual-polarized leaky waveguide, which comprises a rectangular waveguide and a pair of rectangular flanges, the rectangular flanges are respectively welded to the two ends of the rectangular waveguide, and the rectangular waveguide has an integrated structure, including two The rectangular cavities arranged in parallel are respectively a first waveguide cavity and a second waveguide cavity, the first waveguide cavity includes a first upper wide surface, a first lower wide surface and a front narrow surface, and the second waveguide cavity includes a first The second upper wide surface, the second lower wide surface and the rear narrow surface, the first waveguide cavity and the second waveguide cavity are separated by a common narrow surface, and the height of the common narrow surface is the same as that of the front narrow surface, and is greater than or equal to The height of the rear narrow surface, the first upper wide surface and the second upper wide surface are respectively provided with a plurality of leakage slits for generating vertically polarized waves and horizontally polarized waves. The invention realizes the application of the multi-input multi-output technology on a leaky waveguide, not only improves the channel capacity of the system, but also expands the frequency range of the system.

Description

technical field [0001] The invention relates to the technical field of urban rail transit wireless communication and signal transmission, in particular to a dual-polarization leaky waveguide. Background technique [0002] With the development of wireless communication technology in urban rail transit, Communication Based Train Control System (CBTC) has been widely used in urban rail transit signal system. The frequency range of the existing CBTC signal system is 2.4GHz to 2.5GHz. Since most of the electronic equipment in this application frequency band, such as Wi-Fi, iPad, wireless mouse, cordless phone, Bluetooth equipment and medical testing equipment, etc., will undoubtedly It will cause varying degrees of interference to the train-ground wireless transmission signal system and affect the safe operation of the train. [0003] In order to ensure that the train-to-ground wireless transmission signal system is free from external signal interference and ensure the safe oper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P3/12
CPCH01P3/12
Inventor 王胜军尚爱民白龙刚郭明明王如彬贺利强
Owner TONGHAO CABLE GRP CO LTD
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