JPH0281502A - Wind shield antenna structure - Google Patents

Abstract

PURPOSE:To exclude the effect of an electromagnetic wave into a cabin by arranging a radio communication antenna to a window glass of a vehicle and providing a conductor film interrupting the electromagnetic wave to a part where the electromagnetic wave generated from the radio communication antenna of the window glass is radiated toward the cabin. CONSTITUTION:The conductor film 11 for electromagnetic wave interruption is formed to a face of a rear window glass 2 toward the cabin 9, that is, to the entire face of the inner face. Since a transmission and reception antenna 3 is provided to the rear window glass 2, the design and function are improved. Moreover, since the conductor film 11 is provided to the inner face of the rear window glass 2, the radiation of an electromagnetic wave with a comparatively large energy generated from the transmission reception antenna 3 toward the cabin 9 is prevented and the effect of the electromagnetic wave onto passengers or devices in the cabin is excluded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is applied to a vehicle equipped with a wireless communication mechanism, and particularly relates to a windshield antenna structure that prevents the influence of electromagnetic waves generated from a transmitting antenna into a vehicle interior. It is something.

(Prior Art) In recent years, the use of mobile telegraph and telephone equipment has become more active, and so-called car telephones with a transceiver built into a vehicle have come into widespread use, for example, as seen in Japanese Unexamined Patent Publication No. 62-258523. It has become.

By the way, as shown in the above-mentioned publication, vehicle transmitting/receiving antennas are often arranged in a part of the vehicle body away from the cabin, but due to design or functional reasons, they may also be arranged on the surface of the windshield, etc. It is considered.

(Problem to be Solved by the Invention) By the way, when a transmitting/receiving antenna, especially a transmitting antenna, is installed on the windshield, a relatively large electromagnetic wave generated from the antenna is emitted into the vehicle interior, and this electromagnetic wave can harm the passengers and the equipment inside the vehicle. There was a problem that there was a risk of undesirable effects.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a windshield antenna structure that can eliminate the influence of electromagnetic waves into the interior of a vehicle and realize a transmitter/receiver device with excellent design and functionality. do.

(Means for Solving the Problems) A windshield antenna structure according to the present invention has a wireless communication antenna disposed on the windshield of a vehicle, and electromagnetic waves generated from at least the wireless communication antenna on the windshield enter the vehicle interior. To the part where it is released towards,
It is constructed by providing a conductive film that blocks the electromagnetic waves.

(Function) According to the present invention, by providing a wireless communication antenna, particularly a transmitting antenna, on the windshield, not only can the design and functionality be improved, but also the relatively large electromagnetic waves generated from the antenna can be transmitted into the vehicle interior. Since the emission of electromagnetic waves is prevented by a conductive film provided on the windshield, the influence of electromagnetic waves on passengers and equipment inside the vehicle is eliminated. , (Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

1 to 3 show a first embodiment.

In this embodiment, a transmitting/receiving antenna 3 for wireless communication is disposed on the lower outer surface of a rear window glass 2 of an automobile 1. This transmitting/receiving antenna 3 is connected to a radio device 5 at the rear of the vehicle body via an antenna wire 4, and the radio device 5 is connected to a battery 8 at the front of the vehicle body and a telephone 10 in the passenger compartment 9 via a power line 6 and a communication line 7. each connected.

In this case, as shown in FIG. 3, a conductive film 11 for shielding electromagnetic waves is formed on substantially the entire surface of the rear window glass 20 facing the vehicle interior 9, that is, the inner surface.

The conductive film 11 is made of, for example, a metal net or a transparent sheet material, and is designed not to obstruct the rear view of the vehicle body. A thirteenth antenna terminal of the car radio is connected to the conductive film 11 via a lead wire 12, so that the conductive film 11 can function not only as an electromagnetic wave shielding function but also as a radio antenna. Reference numeral 14 denotes a power line connecting the car radio 13 and the battery 8.

According to the configuration of the first embodiment, by providing the transmitting/receiving antenna 3 on the rear window glass 2, it is possible to improve the design and function, and also to provide the conductive film 11 on the inner surface of the rear window glass 2. As a result, relatively large electromagnetic waves are generated from the transmitting and receiving antenna 3 in the vehicle compartment 9.
This prevents electromagnetic radiation from being emitted into the interior of the vehicle, and eliminates the effects of electromagnetic waves on passengers and equipment inside the vehicle.

Furthermore, by using the conductive film 11 as a radio antenna, there are also advantages such as the need for special antenna parts and the construction being made more compact.

FIG. 4 shows a second embodiment of the invention.

In this embodiment, a transmitting/receiving antenna 3 is embedded in a rear window glass 2, and a conductive film 11 for blocking electromagnetic waves is formed on the inner surface of the glass 2. The other configurations are substantially the same as those of the first embodiment.

According to the second embodiment, the transmitting/receiving antenna 3 is buried in the rear window glass 2, thereby preventing antenna corrosion, damage, etc., and further improving the antenna functionality. Similarly, effects such as electromagnetic wave shielding can be achieved.

Furthermore, since the antenna member is not exposed on the glass surface, there is no interference with wipers, etc., and the antenna member can be applied to front windshields, other windshields, and glass roofs in addition to rear windshields.

FIG. 5 shows a third embodiment of the invention.

In this embodiment, a conductive film 11 for blocking electromagnetic waves is embedded in the rear window glass 2.

That is, this rear window glass 2 is a laminated glass having a polymeric structure, and a conductive film 11 is interposed between each of the laminated glass elements 2b. The other configurations are substantially the same as those of the first embodiment.

According to the third embodiment, since the conductive layer 1!11 is embedded in the glass 2, there is no fear of peeling, etc., and it also has the effect of reinforcing the glass 2, etc. It is played in addition to the effect.

In the above embodiment, the conductive film 11 is provided over the entire area of the rear window glass 2, but it is also possible to provide it only around the transmitting/receiving antenna 3. In short, any conductive film may be used as long as it is disposed at a portion where electromagnetic waves generated from the antenna are emitted toward the interior of the vehicle and can prevent the electromagnetic waves from entering the interior of the vehicle.

Further, in the above embodiment, the case where the transmitting/receiving antenna 3 is used has been described, but it can also be widely applied to the case where each antenna dedicated to transmission or dedicated to reception is individually provided on the windshield. Especially for transmission, it is suitable for antennas that generate strong electromagnetic waves.

Further, as described above, the present invention can be widely applied to not only a rear window glass but also a sunroof glass for a vehicle equipped with a sunroof, and any other window glass.

(Effects of the Invention) As detailed in the above embodiments, the windshield antenna structure according to the present invention can eliminate the influence of electromagnetic waves into the vehicle interior, and provide a windshield with excellent design and functionality. The effect is that the installation of the antenna can be realized.

[Brief explanation of the drawing]

The figures show embodiments of the present invention, with Fig. 1 showing the entire vehicle according to the first embodiment, Fig. 2 a view of the vehicle shown in Figs. The enlarged cross-sectional view of the ■TIII line in Figure 2 is a cross-sectional view showing the second embodiment, and Figure 5 is the third embodiment.
FIG. 1... Vehicle 2... Windshield (rear window glass)
3...Antenna for wireless communication (transmission/reception antenna)
9... Car compartment 11... Conductive film

Claims (1)

[Claims] A wireless communication antenna is disposed on a windshield of a vehicle, and a conductive film is provided on at least a portion of the windshield from which electromagnetic waves generated from the wireless communication antenna are emitted toward the vehicle interior. The windshield antenna structure is characterized by: