JPS58970Y2 - Automotive FM antenna - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an FM antenna for an automobile, and more particularly to an FM antenna for an automobile that does not impair the appearance of the automobile and is suitable for FM reception.

To listen to FM broadcasts, you need an FM antenna.
Since FM broadcasting in Japan uses horizontally polarized waves, an FM antenna suitable for receiving horizontally polarized waves is required.

That is, in order to receive horizontally polarized FM waves, it is desirable to install the antenna element along the horizontal direction, and if the receiver is installed at a certain location, it is easy to install a horizontal antenna. However, the FM installed in the car
It is very difficult to install a horizontal antenna in the receiver.

In particular, in the case of antennas installed in automobiles, it is required not only to have the original performance of the antenna, but also to not impair the functions of the automobile and, moreover, not to impair the external appearance.

Therefore, an automotive antenna suitable for receiving FM broadcasts has not yet been provided.

In other words, since cars are used outdoors, they get dirty under the influence of rain, wind, and debris, so they need to be washed occasionally, and the antenna element must not get in the way when washing the car. .

In the past, antennas were installed outside the vehicle, so it was necessary that they would not be damaged by mischief.

Furthermore, even if the antenna is suitable for FM broadcasting, the antenna element does not extend beyond the width of the vehicle or from the length of the vehicle.
When driving a car, there is a risk of coming into contact with other cars or people, which is dangerous and must be avoided at all costs.

In particular, antennas installed in automobiles must not impair the aesthetic appearance of the automobile, but must enhance the aesthetic appeal of the automobile.

For an antenna suitable for FM reception, an F of 83.5MH7
To receive M waves, an antenna element with a length of about 85□□□ is required, and the only place where an antenna element of this length can be installed is the roof of a car, and the roof of a car is the most visible place. Since it is a place where it is easy to get stuck, the quality of the design of the antenna itself will affect the aesthetic appearance of the entire car.

Therefore, this invention aims to provide an FM antenna for automobiles that is not only functionally superior but also aesthetically superior, taking into full consideration the special characteristics of automobile FM antennas as described above. The antenna has the function of a roof molding and can contribute to the appearance of the car.

The details of this invention will be explained below with reference to the attached drawings.

First, in the figure, reference numeral 1 indicates a passenger-type automobile, and the roof 2 is equipped with an FM antenna 3.

This FM antenna includes an antenna element 31 and an insulating element 3.
The antenna element 31 is formed of a conductive metal plate and is attached to the surface of an insulating element 32 made of plastic.

The insulating element 32 has a bottom surface that follows the curved surface of the roof 2, and is shaped like a base plate that is longer in the length direction of the vehicle than its width, and the antenna element 31 is attached to the surface. , is fixed with screws, etc.

This insulating element 32 has a groove 32a formed on its surface corresponding to the width of the antenna element 31 so as to be convenient for fixing the antenna element 31.

An insulating element 32 is fixed to the roof 2 with adhesive or adhesive tape, and the antenna element 31 on the surface of the insulating element 32 is connected to an FM receiver inside the vehicle by a suitable feeder.

Of course, when introducing the feeder into the vehicle, consideration is given to preventing rainwater from entering.

If a folded antenna for amateur radio is required, this can be solved by making the transmitting and receiving antenna 4 stand up on the antenna element 31.

As is clear from the above explanation, the automotive F of this invention
According to the M antenna, a relatively long antenna element can be installed without interfering with the functions of the car so that it is suitable for receiving horizontally polarized FM waves. It is not susceptible to such disasters, can be expected to function as a molding for decorating the roof of a car with a large area, and has many effects such as being able to dress up a car with a novel aesthetic feel.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of an automobile equipped with the FM antenna of this invention, and FIG. 2 is an exploded perspective view of the FM antenna for an automobile. 1... Car, 2... Roof, 3...
...FM antenna, 31-... antenna element, 32... insulation element, 32a...
Concave groove, 4...Antenna for transmitting and receiving.

Claims (1)

[Scope of utility model registration request] The insulating element is equipped with a plate-like insulating element that is long in length compared to its width, and a conductive, plate-like antenna element attached to the surface of this insulating element. An FM antenna for an automobile, characterized in that the antenna is provided along a substantially horizontal plane.