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Method for making the vehicular antennal with the leaky coaxial cable

A leaky coaxial cable, vehicle antenna technology, applied in the direction of electrical short antenna, antenna, antenna coupling, etc., can solve the problems of wrong driving instructions, electromagnetic field interference, increased bit errors, etc.

Inactive Publication Date: 2011-04-20
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, vehicle-mounted antennas in leaky coaxial vehicle-to-ground communications generally use "dipole" antennas, surface wave antennas or other antennas with strong directivity, but these antennas are open antennas, and the vehicle-mounted transmission system will Generate electromagnetic field interference, and the vehicle's receiving system is also susceptible to interference from external electromagnetic waves
The vehicle-ground communication system is related to the safety of driving. If it is subject to external interference, it will increase error codes and even cause errors in driving instructions.
Especially in extraordinary times, it is easy for the enemy to use many radio stations in remote areas to attack the vehicle-ground communication system of the traffic command, resulting in the paralysis of the vehicle-ground traffic system

Method used

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  • Method for making the vehicular antennal with the leaky coaxial cable
  • Method for making the vehicular antennal with the leaky coaxial cable

Examples

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Effect test

Embodiment Construction

[0009] 1. Copper tape is longitudinally wrapped on the leaky coaxial physical foamed polyethylene insulating medium (2), and the width of the copper tape is about 2 / 3 of the diameter of the outer layer of the physical foamed polyethylene insulating layer, forming a leaky coaxial The outer conductor (3) then directly enters the sheath extruder to extrude a polyethylene sheath (4) with a thickness of 2.5 mm.

[0010] 2. Intercept the leaky coaxial with a length of nλ / 4, where n is an odd number of 1, 3, 5, 7, 9, 11, 13, 15..., and λ is the electromagnetic wave wavelength of the vehicle-mounted transmitting antenna or receiving antenna. Seal and short-circuit the intercepted leakage coaxial terminal inner conductor (1) and outer conductor (3) with a copper sheet (5) whose diameter is the same as that of the outer conductor. Leaky coaxial vehicle antenna (6).

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Abstract

This invention relates to one method to process mobile antenna by use of leakage co-axis cable, which uses longitude tank leakage co-axis nlambada / 4 short circuit as mobile system emission and receive antenna, wherein, the n for odds for one, three, etc and lambada for electromagnetic wave length of the mobile send or receive antenna wave.

Description

technical field [0001] The invention relates to the technical field of rail transit vehicle-ground communication. Specifically, it is a method for making vehicle-mounted antennas by using leaky coaxial cables, which is applied in high-speed railway vehicle-to-ground communication. Background technique [0002] At present, vehicle-mounted antennas in leaky coaxial vehicle-to-ground communications generally use "dipole" antennas, surface wave antennas or other antennas with strong directivity, but these antennas are open antennas, and the vehicle-mounted transmission system will Electromagnetic field interference is generated, and the vehicle receiving system is also susceptible to interference from external electromagnetic waves. The vehicle-ground communication system is related to the safety of driving. If it is interfered by external sources, it will increase error codes and even cause errors in driving instructions. Especially in extraordinary times, it is easy for the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/32H01Q1/52H01Q9/00
Inventor 简水生王均宏延凤平张峰曹继红
Owner BEIJING JIAOTONG UNIV
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