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GPS antenna for two-wheel vehicle

A technology for GPS antennas and two-wheeled vehicles, which is applied in the direction of antenna supports/installation devices, antennas, measuring devices, etc., and can solve problems such as low accuracy and displacement

Inactive Publication Date: 2002-10-02
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Furthermore, there is also the following problem: if a planar antenna is used for the GPS of a moving object such as a motorcycle in which the state of the driving process changes greatly, when the body posture is tilted, the strong directivity of the planar antenna is relatively from the low elevation angle. The satellite's radio waves are shifted, so the accuracy is low

Method used

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  • GPS antenna for two-wheel vehicle
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  • GPS antenna for two-wheel vehicle

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Embodiment Construction

[0015] The present invention will be described in detail below with reference to the accompanying drawings. figure 1 It is a perspective view of the GPS antenna device 1 of the first embodiment of the present invention, and the antenna device includes: a cube-shaped antenna case 11; a helical antenna 12 extending outward from the antenna case 11; housed in the aforementioned antenna case 11, A control circuit board 13 that amplifies radio waves received by the aforementioned helical antenna 12 and converts them into a predetermined format.

[0016] The length direction of the aforementioned antenna box 11 can not only be as figure 1 As shown, it is in the axial direction of the helical antenna 12 , or in a direction perpendicular to the helical antenna 12 as shown in FIG. 2 .

[0017] Like this, because the GPS antenna of present embodiment is helical antenna 12, can reduce the projected area of ​​antenna itself on the plane perpendicular to its axial direction, so, when this...

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Abstract

A GPS antenna device for a two-wheeled vehicle that can be installed without damaging the appearance of the two-wheeled vehicle. It is installed on the two-wheeled vehicle and used to receive radio signals from GPS satellites. The GPS antenna device includes: from the antenna box 11 to the outside An extended helical antenna 12, and a control device 13 housed in the aforementioned antenna box 11 for processing radio signals received by the aforementioned helical antenna 12. Since the projected area of ​​the helical antenna is small, it is possible to install the GPS antenna without compromising the aesthetics and aerodynamic characteristics even for a two-wheeled vehicle with few flat parts facing the sky.

Description

technical field [0001] The present invention relates to a GPS antenna for a motorcycle, in particular to a GPS antenna for a motorcycle that can be mounted without damaging the appearance of the motorcycle. Background technique [0002] As a GPS antenna of a four-wheeled vehicle such as a private car, as disclosed in Japanese Patent Application Laid-Open No. 4-326202, a square shape of 20 to 60 milliangles (ミリ angle) in length and width is adopted; and a diameter of 20 to 60 millimeters A planar antenna in the shape of a disk, called a patch antenna. Such a planar antenna can be integrated with multiple antenna elements, so the directivity in the vertical direction is extremely high. Also, since a diversity antenna structure is formed, a good signal reception state can be obtained. [0003] Furthermore, it is known that the navigation system using GPS, when using radio waves sent from satellites with low elevation angles close to the horizon, is strongly affected by multip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S1/00H01Q1/22H01Q1/32H01Q11/08
CPCB60C23/006B60C23/0444G01S19/14H01Q1/3266H01Q11/08
Inventor 盛田裕之
Owner HONDA MOTOR CO LTD