JPH06291532A - Tracking antenna - Google Patents

Abstract

PURPOSE:To provide the tracking antenna which can always receive satisfactorily a radio wave, as well of other frequency band, and also, is simple as a whole and excellent as a design, as well by installing not only a BS antenna but also another directional antenna for tracking automatically a radio wave of other frequency band, in a rotating body of a rotary mechanism part. CONSTITUTION:The tracking antenna is constituted so that a rotary panel 2 rotate in the roughly horizontal surface, on a fitting base 5 to a moving body. Also, on this rotary panel 2, a BS tracking antenna 3 for tracking and receiving a radio wave form a broadcasting satellite is provided, and also, another directional antenna 6 for tracking automatically a radio wave of other frequency band is provided. As for the radio wave of other frequency band, a television radio wave of a ground broadcast, a radio wave for a radio broadcast and for a radio communication, for a satellite communication, etc., are also allowable. Accordingly, not only a satellite broadcast can be tracked and received, but also, other radio wave than the satellite broadcast is tracked automatically and can be received by a directional antenna 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a tracking antenna mounted on a moving body such as a bus, a train or a ship for tracking received radio waves, and in particular receives broadcast radio waves and other radio waves from artificial satellites. A tracking antenna for a mobile object.

[0002]

2. Description of the Related Art FIG. 4 is a perspective view showing a conventional example of a tracking antenna mounted on an automobile. A turntable 2 is mounted on a roof 1 of an automobile, and an antenna 3 for receiving satellite broadcast (hereinafter referred to as "BS antenna") 3 is attached to the turntable 2. The BS antenna 3 receives a radio wave transmitted from an artificial satellite, detects its arrival direction, and is automatically controlled so that the antenna always faces the artificial satellite. Therefore, even if the direction of a moving body such as an automobile changes, the BS antenna 3 always faces the broadcasting satellite, so that the receiving condition is always the best.

[0003]

On the other hand, a terrestrial television antenna is also provided to receive terrestrial television radio waves, so that the vehicle can always receive a stable reception regardless of the direction. , An omnidirectional antenna is used. Therefore, although the vehicle can be tentatively received in any direction, the antenna directivity gain in the arrival direction of the radio wave is sacrificed, so that the reception sensitivity is lowered and the reception state is not good.

The BS antenna 3 has a diameter of 1 m.
It is covered with a cover 4 of a certain degree, and rotates with the turntable 2 in it, but since it uses a large-scale BS antenna 3 in addition to the conventional TV antenna for terrestrial waves, the overall structure is complicated and costly. Besides, it is not preferable in terms of design.

The technical problem of the present invention is to pay attention to such a problem, and in the tracking antenna for satellite broadcast reception, the radio waves of other frequency bands can always be favorably received, and the overall structure is simple and design. It is to realize an excellent tracking antenna.

[0006]

FIG. 1 is a perspective view illustrating the basic structure of a tracking antenna according to the present invention. Reference numeral 5 denotes a mounting base for a moving body, on which the turntable 2 rotates in a substantially horizontal plane. Then, on the turntable 2, a radio wave from a broadcasting satellite is tracked and received B
It has a tracking antenna 3 for S, and also has another directional antenna 6 for automatically tracking radio waves in other frequency bands. The radio waves in other frequency bands may be terrestrial broadcasting television waves, radio waves for radio broadcasting, wireless communication, satellite communication, or the like.

[0007]

According to the present invention, another directional antenna 6 for automatically tracking radio waves in other frequency bands is provided on the rotating plate 2 on which the BS tracking antenna 3 for tracking and receiving radio waves from artificial satellites is installed. As a result, the satellite broadcasting can be tracked and received, and the radio waves other than the satellite broadcasting can be automatically tracked and received by the directional antenna. As a result, terrestrial TV radio waves and radio waves for radio broadcasting / communication can be automatically tracked and always received well.

Moreover, since another antenna for automatically tracking other radio waves is also mounted together with the BS antenna, compared with the conventional structure in which various other antennas are separately mounted at different positions from the BS antenna, The overall configuration is simplified and 1
Since the automatic tracking mechanism of the stand can be used for both satellite broadcasting and automatic tracking of other radio waves, it can be realized at low cost. Also, the design will be improved.

[0009]

Next, practical examples of how the tracking antenna according to the present invention is embodied will be described. In Figure 1,
The tracking antenna 6 for receiving radio waves other than satellite broadcasting is exemplified by a pole antenna for television reception, but any other type of antenna may be used as long as it is a directional antenna having a large gain in a specific direction. . Further, it may be an antenna for radio reception or an antenna for both radio and television. Alternatively, it may be an antenna for various types of wireless communication or satellite communication. Further, the number of antennas is not limited to one, and a plurality of antennas may be installed in addition to the BS antenna 3. It is preferable that a shield member is provided between the BS antenna 3 and the other antenna 6 to electromagnetically block them.
A BS antenna converter 7 and the like are installed near the BS antenna 3.

FIG. 2 is a block diagram showing an example in which the tracking antenna according to the present invention is used for receiving a television broadcast. The television receiver 8 is connected to a BS tuner 10 and a terrestrial broadcasting TV tuner 11 via a switching circuit 9. The BS tuner 10 is connected to the BS antenna 3 of FIG. 1, and the TV tuner 11 is connected to the terrestrial TV antenna 6 of FIG.

Further, the BS tuner 10 and the TV tuner 11 are connected to an automatic tracking circuit 12, and a signal from the automatic tracking circuit 12 is input to a drive control unit 13 of the tracking antenna. Reference numeral 14 denotes an antenna changeover switch, and the changeover signal is input to the antenna changeover circuit 9 to selectively connect the BS antenna 3 or the TV antenna 6 to the TV receiver 8, and the antenna changeover signal is sent to the automatic tracking circuit 12. By inputting, an antenna for automatic tracking is selected.

Now, when satellite broadcasting is selected by the antenna changeover switch 14, the antenna changeover signal is inputted to the antenna changeover circuit 9, the BS tuner 10 is connected to the TV receiver 8, and the automatic tuner circuit 12 is connected to the BS tuner. Based on the signal input from 10, the tracking antenna drive control unit 13 operates to control the tracking antenna drive motor M. As a result, the radio wave transmitted from the broadcasting satellite is automatically tracked based on the signal input from the BS tuner 10, and the BS antenna 3 of FIG. Always faces the broadcasting satellite.

When the terrestrial broadcast is selected by the antenna changeover switch 14, the terrestrial broadcast TV tuner 11 is connected to the TV receiver 8 and the automatic tracking circuit 12 operates on the basis of the signal input from the TV tuner 11. The drive control unit 13 of the tracking antenna is controlled, and the drive motor M controls the TV antenna 6 for terrestrial broadcasting to always face the direction of the received radio wave.

In the circuit of this embodiment, a switch 14 is used to switch and select satellite broadcasting or terrestrial broadcasting, but a channel switching circuit can be provided instead of the switch 14. In this case, the channel selection signal is input to the antenna switching circuit 9 and B
When the S tuner 10 or the TV tuner 11 for terrestrial broadcasting is selectively connected to the TV receiver 8 and the channel selection signal is input to the automatic tracking circuit 12, the TV radio waves of the channel selected by the channel switching circuit are automatically tracked. . The automatic tracking method for each selected channel is effective when the position of the transmitting antenna for terrestrial broadcasting is different for each channel and the broadcast radio wave arrives from each direction.

In the embodiment shown in FIG. 2, satellite broadcasting and terrestrial broadcasting are selectively received. Therefore, for example, while watching the satellite broadcasting on the TV receiver 8, it is not possible to record the terrestrial broadcasting with a video tape recorder. Can not. If you need to receive both satellite and terrestrial broadcasts at the same time,
The circuit configuration of FIG. 3 is effective.

In the embodiment of FIG. 3, the tuner 15 is used for both satellite broadcasting and terrestrial broadcasting, and the BS antenna 3 is used.
And both signals received by the terrestrial broadcasting antenna 6,
The input is made via the mixer 16. Then, the drive control unit 13 is controlled by the signal of the channel selected by the dual-purpose tuner 15 via the automatic tracking circuit 12a, and the automatic tracking motor M performs automatic tracking.

In this case, satellite broadcasting and terrestrial broadcasting can be received at the same time, but only one of them can be automatically tracked. Therefore, when the satellite broadcasting receiving antenna is automatically tracked, the terrestrial broadcasting antenna is I cannot track automatically,
The reception status of terrestrial broadcasting will deteriorate. Therefore, in the case of a method of receiving both at the same time as in this embodiment, a circuit configuration in which an automatic tracking antenna can be selected according to a program to be viewed or only a satellite broadcast radio wave is automatically tracked,
The terrestrial broadcasting antenna may be an omnidirectional antenna.

Although the example of receiving the satellite broadcast and the terrestrial TV broadcast has been described, the antenna 6 other than the satellite broadcast receiving antenna 6 is used.
Can be used as antennas for radio broadcasting, wireless communication, or satellite communication, or these antennas and a TV antenna for terrestrial broadcasting can be installed on the turntable 2 in FIG.

[0019]

As described above, according to the present invention, the tracking antenna 3 for the BS that tracks and receives the radio waves from the artificial satellites.
In addition, since it has another directional antenna 6 that automatically tracks radio waves in other frequency bands, it can track satellite radio waves and receive them well, and also has directivity for radio waves other than satellite broadcasts. The antenna automatically tracks and can receive well.

As described above, the terrestrial broadcast TV radio waves and radio / communication radio waves are automatically tracked so that they can always be received well. Moreover, the BS antenna is also equipped with another antenna for automatically tracking other radio waves. Since the automatic tracking mechanism is also used, the configuration is simplified, the cost can be realized, and the design is improved.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating a basic configuration of a tracking antenna according to the present invention.

FIG. 2 is a block diagram showing an example in which the tracking antenna according to the present invention is implemented to receive a television broadcast.

FIG. 3 is an embodiment using a tuner for both satellite broadcasting and terrestrial broadcasting.

FIG. 4 is a perspective view showing a conventional example of a tracking antenna mounted on an automobile.

[Explanation of symbols]

 1 Car roof 2 Rotating disc (rotating body) 3 BS antenna 5 Mounting base for moving body 6 Another directional antenna 7 Converter M Automatic tracking motor 8 Television receiver 9 Switching circuit 10 BS tuner 11 TV tuner for terrestrial broadcasting 12, 12a Automatic tracking circuit 13 Tracking antenna drive controller 14 Antenna selector switch 15 Satellite and terrestrial broadcast tuner 16 Mixer

Claims (1)

[Claims] 1. A tracking antenna having a mechanism for rotating in a substantially horizontal plane for receiving and receiving a radio wave from an artificial satellite, which is installed on a moving body, wherein the rotating body (2 In addition to the BS antenna (3), another directional antenna (6) that automatically tracks radio waves in other frequency bands is installed in the tracking antenna.