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Rotary type vehicle-mounted antenna for Big Dipper navigation system

A Beidou navigation system and vehicle-mounted antenna technology, which is applied to antennas, antennas, antenna supports/mounting devices suitable for movable objects, can solve problems such as narrow working frequency band, hidden safety hazards, and worrying communication security, and achieve return The effect of small wave loss, slowing down traffic jams, and good navigation effect

Inactive Publication Date: 2011-08-17
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the antennas commonly used in navigation and positioning systems have a narrow working frequency band, and most of them are based on the single mode of the American GPS navigation system, which leads to hidden dangers in timing and communication security.

Method used

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  • Rotary type vehicle-mounted antenna for Big Dipper navigation system
  • Rotary type vehicle-mounted antenna for Big Dipper navigation system
  • Rotary type vehicle-mounted antenna for Big Dipper navigation system

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with the embodiments and accompanying drawings.

[0026] see figure 1 with 2, the embodiment of the present invention is provided with 2 pairs of recursive S-shaped rotating dipole arms 2 for 1.6G, 2 pairs of recursive S-shaped rotating dipole arms 3 for 2.5G, a support frame 5, and a feed connection conductor 4. Feed head 8 and copper reflector 1. 4 pairs of recursive S-shaped rotating dipole arms are dipole arms made of copper sheets, and each pair of recursive S-shaped rotating dipole arms is equipped with a recursive S shaped positive arm and 1 recursive S-shaped negative arm. The thickness of the copper sheets used in the 4 pairs of recursive S-shaped rotating dipole arms is 0.5mm and the width is 3mm. The feed point 7 of the 2 pairs of recursive S-shaped rotating dipole arms 2 for 1.6G is located in the horizontal plane relative to the feed point 6 of the 2 pairs of recursive S-shaped rotating...

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Abstract

The invention provides a rotary type vehicle-mounted antenna for a Big Dipper navigation system and relates to a dipole antenna. The rotary type vehicle mounted antenna is provided with four pairs of dipole arms, a support bracket and a coaxial feed cable metallic reflection plate, wherein the four pairs of dipole arms are divided into two groups; the front end of each group of rotary type dipolearms is provided with feeding points; a feed cable is provided with internal and external leads; the feeding points of positive arms are connected with the internal lead, and the feeding points of negative arms are connected with a coaxial-cable outer conductor; the feeding points in each group of dipole arms are arranged in the same plane; angles of elevation are formed by four dipole arms and the plane; a distance exists among planes in which the feeding points are arranged and the distance also exists between the planes and a ground plane; the two groups of rotary type dipoles are used forreceiving and transmitting Big Dipper signals respectively; the internal lead is connected with a vehicle-mounted navigation system and the external lead is connected with the reflection plate; and the reflection plate is fixed on a vehicle body. The vehicle-mounted antenna has the advantages of good gain performance, large bandwidth, low return loss and omnidirectional radiation characteristic; in addition, the transmitting signal frequency can cover 1600+ / -100MHz, and the receiving signal frequency can cover 2500+ / -80MHz.

Description

technical field [0001] The invention relates to a dipole antenna, in particular to a rotary symmetrical double dipole vehicle-mounted antenna for a satellite navigation and positioning system. Background technique [0002] In 2000, my country launched two Beidou navigation test satellites, built the Beidou satellite navigation test system, and solved the problem of whether the satellite navigation system exists. In 2004, the construction of the Beidou satellite navigation system was launched, and for the first time, it began to develop and produce satellites and launch vehicles in batches, launch them in intensive networks, and explore a new development model for the aerospace industry. Due to the service characteristics of combining navigation and communication, the test system has gradually been recognized by domestic users after several years of development, and has been applied in many fields such as fishery, transportation, electric power and national security, especial...

Claims

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Application Information

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IPC IPC(8): H01Q1/32H01Q1/36H01Q1/12H01Q5/00
Inventor 游佰强王天石周志微周建华黄天赠池金燕陈苗苗
Owner XIAMEN UNIV
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