TW201306382A - Vehicle antenna system - Google Patents

Abstract

The present invention provides a vehicle antenna system for mounting on a vehicle. The vehicle comprises a vehicle body and a ground terminal. The vehicle antenna system comprises an antenna, a transmission cable, and a filtering device. The antenna comprises a first feed-in unit and a second feed-in unit. The transmission cable comprises a central conductor, and an enclosing conductor which surrounds the central conductor and is electrically connected to the ground terminal. The filtering device comprises a first connection port electrically connected to the first feed-in unit, a second connection port electrically connected to the second feed-in unit, a third connection port electrically connected to the central conductor, a fourth connection port electrically connected to the vehicle body, a first filtering unit electrically connected between the first connection port and the third connection port, and a second filtering unit electrically connected between the second connection port and the fourth connection port.

Description

Vehicle antenna system

The present invention relates to an antenna system, and more particularly to a vehicle antenna system.

Generally, vehicles usually have some electronic devices, such as a radio, a video player, and a mobile TV. Some of the signals of the electronic devices must receive wireless signals through an antenna system. However, each electronic device is in operation. The electromagnetic waves generated during the process will form noise, which will cause noise interference to the antenna system. In addition, since the vehicle body is the largest conductor capable of receiving noise, noise interference will pass through the vehicle body. Affecting the antenna system results in more severe interference to the antenna system.

Accordingly, it is an object of the present invention to provide a vehicle antenna system that can enhance signal reception and reduce noise interference.

Accordingly, the vehicle antenna system of the present invention is mounted on a vehicle including a vehicle body, a wireless transmission device disposed on the vehicle body, and a ground terminal providing a reference potential, the vehicle antenna system including An antenna, a transmission line, and a filtering device.

The antenna includes a first feed portion and a second feed portion.

The transmission line includes a center conductor for electrically connecting the wireless transmission device, and a covered conductor surrounding the center conductor for electrically connecting the ground end, and the center conductor forms an insulation with the covered conductor.

The filtering device includes a first connecting port electrically connected to the first feeding portion, a second connecting port electrically connected to the second feeding portion, a third connecting port electrically connecting the center conductor, and an electrical connection a fourth connecting port of the vehicle body, a first filtering unit electrically connected between the first connecting port and the third connecting port, and an electrical connection between the second connecting port and the fourth connecting port Second filtering unit.

The wireless signal received by the antenna sequentially enters the wireless transmission device via the first feeding portion, the first connection port, the first filtering unit, the third connection port, and the center conductor.

The wireless signal received by the vehicle body is sequentially transmitted through the fourth connection port, the second filtering unit, the second connection port, the second feeding portion, the first feeding portion, and the second feeding portion. The first port, the first filter unit, the third port, and the center conductor enter the wireless transmission device.

The invention has the beneficial effects that: when the vehicle antenna system is operated, in addition to the antenna receiving, since the vehicle body can receive the wireless signal and feed into the antenna, the wireless signal can be received only through the antenna. The antenna system of the vehicle can improve the signal receiving effect. In addition, since the wireless signal received from the vehicle body is isolated by the second filtering unit, the antenna is less affected by noise. In turn, the use effect of providing a wireless signal with better quality to the wireless transmission device can be achieved.

The foregoing and other objects, features, and advantages of the invention are set forth in the <RTIgt;

As shown in FIGS. 1 and 2, a preferred embodiment of the vehicle antenna system 200 of the present invention is for mounting on a vehicle 90. The vehicle 90 includes a vehicle body 91 and a wireless transmission device 92 disposed on the vehicle body 91. And a ground terminal 93 for providing a reference potential, the vehicle antenna system 200 includes an antenna 20, a transmission line 40, and a filtering device 30. In the embodiment, the wireless transmission device 92 employs a radio.

The antenna 20 includes a first feed portion 21 and a second feed portion 22 which can be manufactured using a planar printed antenna or a rod antenna.

The transmission line 40 includes a center conductor 41 for electrically connecting the wireless transmission device 92, and a covered conductor surrounding the center conductor 41 for electrically connecting the ground terminal 93. The center conductor 41 and the cladding conductor 42 Insulation is formed between them. In the present embodiment, the transmission line 40 is a coaxial cable.

The filtering device 30 includes a first connecting port 31 electrically connected to the first feeding portion 21, a second connecting port 32 electrically connected to the second feeding portion 22, and a third electrically connected to the center conductor 41. a connecting port 33, a fourth connecting port 34 electrically connected to the vehicle body 91, a first filtering unit 35 electrically connected between the first connecting port 31 and the third connecting port 33, and an electrical connection a second filtering unit 36 between the second port 32 and the fourth port 34.

The wireless signal received by the antenna 20 is sequentially accessed through the first feeding portion 21, the first connecting port 31, the first filtering unit 35, the third connecting port 33, and the center conductor 41. Wireless transmission device 92.

The wireless signal received by the vehicle body 91 is sequentially passed through the fourth port 34, the second filtering unit 36, the second port 32, and the second feeding portion 22, in addition to the antenna 20 receiving. The first feeding portion 21, the first connecting port 31, the first filtering unit 35, the third connecting port 33, and the center conductor 41 enter the wireless transmission device 92.

Thereby, when the vehicle antenna system 200 is operated, in addition to the antenna receiving, since the vehicle body 91 can receive the wireless signal and feed into the antenna 20, the wireless signal can be received only through the antenna 20. The antenna system 200 of the vehicle can improve the signal receiving effect. In addition, since the wireless signal received from the vehicle body 91 is isolated by the second filtering unit 36, the antenna 20 is interfered by noise. The degree of use is small, and the effect of providing a wireless signal of better quality to the wireless transmission device 93 can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the present invention and the contents of the specification are all It is still within the scope of the invention patent.

200. . . Vehicle antenna system

36. . . Second filtering unit

20. . . antenna

40. . . Transmission line

twenty one. . . First feed

41. . . Center conductor

twenty two. . . Second feed

42. . . Coated conductor

30. . . Filter device

90. . . vehicle

31. . . First connection埠

91. . . Car body

32. . . Second connection

92. . . Wireless transmission device

33. . . Third connection埠

93. . . Ground terminal

34. . . Fourth port

35. . . First filtering unit

1 is a schematic view showing a preferred embodiment of the vehicle antenna system of the present invention; and

Figure 2 is a schematic diagram showing the connection of a transmission line, a third port, and a wireless transmission device in the preferred embodiment.

200. . . Vehicle antenna system

35. . . First filtering unit

20. . . antenna

36. . . Second filtering unit

twenty one. . . First feed

40. . . Transmission line

twenty two. . . Second feed

90. . . vehicle

30. . . Filter device

91. . . Car body

31. . . First connection埠

92. . . Wireless transmission device

32. . . Second connection

93. . . Ground terminal

33. . . Third connection埠

34. . . Fourth port

Claims (2)

A vehicle antenna system for mounting on a vehicle, the vehicle comprising a vehicle body, a wireless transmission device disposed on the vehicle body, and a grounding terminal for providing a reference potential, the vehicle antenna system comprising: one day The wire includes a first feeding portion and a second feeding portion; a transmission line includes a center conductor for electrically connecting the wireless transmission device, and a covered conductor surrounding the center conductor for electrically connecting the grounding end An insulating structure is formed between the center conductor and the covered conductor; and a filtering device includes a first connecting port electrically connected to the first feeding portion, and a second connecting port electrically connected to the second feeding portion, a third connection port electrically connected to the center conductor, a fourth connection port electrically connected to the vehicle body, a first filter unit electrically connected between the first connection port and the third connection port, and an electric a second filtering unit connected between the second port and the fourth port; wherein the wireless signal received by the antenna is sequentially connected to the first port, the first port, and the first filter Unit, the third Connecting, and the center conductor enters the wireless transmission device; wherein, in addition to the antenna receiving, the wireless signal received by the vehicle body is sequentially connected to the fourth connection unit, the second filtering unit, and the second connection The second feeding portion, the first feeding portion, the first connecting port, the first filtering unit, the third port, and the center conductor enter the wireless transmission device. The vehicle antenna system according to claim 1, wherein the antenna is selected from the group consisting of a printed antenna and a rod antenna.