JPH06112715A - Glass antenna for vehicle - Google Patents

Abstract

PURPOSE:To provide a glass antenna for vehicle which can unify a transmission/ reception antenna for telephone, etc., with a blur eliminating hot wire without deteriorating the receiving performance and therefore can save the installing space of the antenna. CONSTITUTION:A conductor pattern 2 of an FM radio antenna is formed on the surface of a window glass 1 by means of a conductor paste together with a blur eliminating hot wire conductor pattern 3 formed by means of a resistance paste. Furthermore a conductor pattern 4 for transmission/reception antenna of a car telephone is unified with the pattern 3 in its earth side area. In such a constitution, the installing space of a glass antenna is saved and secured. Then the voltage fluctuation caused at the part of the pattern 4 can be minimized even if the fluctuation is produced to the DC voltage applied to the pattern 3 from a battery or a generator. Thus it is possible to prevent as much as possible the deterioration of the receiving performance of the antenna due to the noises caused by the voltage fluctuation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass antenna for a vehicle in which a conductor is formed in a predetermined shape on a window glass of a vehicle. The present invention relates to a glass antenna for a vehicle, which is incorporated into a vehicle to be integrally formed.

[0002]

2. Description of the Related Art In vehicles such as automobiles, AM, FM
It is common practice to dispose a radio receiving antenna on a windshield. For example, JP-A-60-72
As disclosed in Japanese Patent No. 402 and the like, there is known one in which a conductive paint (conductor paste) is printed on a glass surface to form an antenna conductor pattern having a predetermined shape. Further, the wind glass is also provided with a heat wire for removing fogging, and similarly, a heat wire conductor is formed into a pattern by a resistance paste. It is also known that the conductor pattern is not printed on the glass surface, but the antenna wire is embedded in the intermediate film portion of the laminated glass, or the tungsten wire is embedded as the heat wire. In addition, AM for the heat conductor
The function of an antenna is also added and used as a dual function.

[0003]

By the way, in recent years, mobile phones, so-called car phones, have been attracting attention as equipment for vehicles such as automobiles, and an antenna for both transmission and reception of this phone is also arranged on the windshield. There is a demand to set it up. However, as described above, since the conductor pattern and the heat conductor pattern of the reception-only antenna of the radio or the like are formed on the wind glass, there is no empty space, and there is a problem that it is difficult to secure an installation space.

Further, since a car telephone transmits and receives a weak high-frequency signal, it is easily affected by external interference, and therefore the antenna should be arranged carefully.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a transmitting / receiving antenna for a telephone or the like integrally with a heat ray for removing fog without impairing reception performance. An object of the present invention is to provide a glass antenna for a vehicle, which is capable of consolidating the installation space.

[0006]

In order to achieve the above object, the present invention is a vehicle glass antenna in which a conductor is patterned in a predetermined shape on a window glass of a vehicle, the conductor serving as a transmitting / receiving antenna for a telephone or the like. It is characterized in that the pattern is incorporated and integrally formed in the ground side region of the heat wire conductor pattern formed on the window glass for removing fogging.

[0007]

According to the vehicle glass antenna of the present invention having the above structure, the conductor pattern of the transmitting / receiving antenna is incorporated into a part of the heat wire conductor pattern and integrally formed so that the installation space is integrated. And secure the installation space. Moreover, at that time, since the conductor pattern of the antenna for both transmission and reception is interposed in the ground side area of the heat wire pattern,
Even if the DC voltage applied to the heat wire conductor pattern from the battery or generator fluctuates due to switching of other electric equipment, the voltage fluctuation in the antenna conductor pattern will be very small. It is possible to suppress the deterioration of the reception performance due to the occurrence of noise, etc. as much as possible.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view showing a preferred embodiment of a vehicle glass antenna according to the present invention, which shows a rear window glass of an automobile.

The window glass 1 is provided with a reception antenna for FM radio, a heat ray for removing fog, and a transmission / reception antenna for car telephone. That is,
The surface of the window glass 1 is FM with a conductive paste.
While the conductor pattern 2 of the radio antenna is formed,
The heat wire conductor pattern 3 is formed of the resistance paste, and the heat wire conductor pattern 3 for removing the fog also has a function of an antenna dedicated to reception of the AM radio and is also used.

By the way, the heat wire conductor pattern 3 is integrally formed by incorporating the conductor pattern 4 of the antenna for both transmission and reception of a car telephone in the ground side area.
This car telephone antenna is a so-called loop antenna, and its conductor pattern 4 has a substantially ∞ shape, and is connected in series to the heat wire conductor side at two points where the excitation current becomes zero.

As shown in FIG. 2, the conductor pattern 4 of the transmitting / receiving antenna is connected to the radio device 5. A handset 6 is connected to the wireless device 5, and voice signals and control signals are exchanged between the both handsets 5, 6.

As described above, in the glass antenna for an automobile according to the present embodiment, the conductor pattern 4 of the antenna for both transmission and reception is incorporated into the heat conductor pattern 3 and integrally formed, so that the installation space is integrated. Secure a space for installing a transmitting and receiving antenna for car phones. Moreover, since the conductor pattern 4 of the antenna for both transmission and reception is interposed in the ground side region of the heat wire conductor pattern 3, the DC voltage applied from the battery or the generator to the heat wire conductor pattern 3 causes switching of other electric devices. Even if a change occurs due to the above, the conductor pattern 4 of the transmitting / receiving antenna
Since the voltage fluctuation in the part becomes minute, it is possible to suppress the deterioration of the reception performance such as the generation of noise due to the influence of the voltage fluctuation as much as possible.

[0013]

As described above in detail in the embodiments,
According to the glass antenna for a vehicle according to the present invention, the conductor pattern of the antenna for both transmission and reception of a car telephone or the like is incorporated into the heat wire conductor pattern for removing the fog and integrally formed to interpose the installation space. The installation space can be sufficiently secured as shown in the figure, and furthermore, the conductor pattern of the antenna for both transmission and reception is incorporated in the ground side area of the heat wire conductor pattern and interposed, so that it can be added to the heat wire conductor pattern from the battery or generator. Even if the DC voltage fluctuates due to switching of other electrical equipment, the voltage fluctuation in the conductor pattern part of the transmitting / receiving antenna is very small. It is possible to suppress the deterioration of performance as much as possible.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a block diagram of a car phone.

[Explanation of symbols]

 1 Wind glass 3 Heat ray pattern 4 Antenna pattern

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Issei Shigeta 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (1)

[Claims] 1. A glass antenna for a vehicle, in which a conductor is formed in a predetermined shape on a windshield of a vehicle, wherein a conductor pattern serving as a transmitting / receiving antenna for a telephone or the like is formed on the windshield for removing fog. A glass antenna for a vehicle, wherein the glass antenna for a vehicle is integrally formed in a ground side region of a heat wire conductor pattern.