KR200360034Y1 - Multi channel satellite antenna for mobile reception - Google Patents

Abstract

The present invention is constructed by using the rotating table 25 in the casing 22, the satellite antenna for outputting the broadcast signal of the satellite to the satellite receiver: a plurality of antennas arranged at uniform intervals on the rotating table (25) Part 20; A gyro sensor 26 installed inside the casing 22 to generate a signal according to the positional movement of the movable body; A controller 30 which is selectively received by the antenna unit 20 on one side and corrects the position of the selected antenna unit 20; And driving means for varying the position of the antenna unit 20 so as to track the satellite according to the signal of the controller 30.

It is expected to contribute to the development of mobile reception by being able to receive two or more satellite signals with different frequencies and polarizations depending on the values selected in the satellite receiver mounted on a mobile vehicle.

Description

Multi channel satellite antenna for mobile reception

The present invention relates to a multi-channel satellite antenna for mobile reception, and more particularly, to receive two or more satellite signals received at different frequencies and polarization according to a value selected from a satellite receiver mounted on a mobile object such as a vehicle. A multi-channel satellite antenna for mobile reception.

Satellite broadcasting is a method of transmitting or retransmitting signals by space stations mounted on satellites, which was initially recognized for the purpose of eliminating astigmatism. It is getting more attention for use. In addition, since it has strengths that are in line with the trend of digitalization, it is also possible to provide data services that can send and receive various types of information interactively.

Various antennas are being released depending on the structure, mission, and function of a satellite, but a dish-type parabola antenna or a planar microstrip array antenna is generally used to receive a broadcast satellite from a mobile vehicle or the like. At this time, the planar antenna has a disadvantage of low gain and easy interference with surrounding signals due to the directivity in the vertical direction, but it is mainstream for vehicle mounting in terms of miniaturization and ease of handling.

1 is a cross-sectional view schematically showing an example of a conventional satellite antenna.

1 is an example of a configuration using a planar antenna as a "satellite antenna for automobiles" disclosed in Korean Laid-Open Patent No. 2001-0016081. Specifically, the rotating body 15 installed inside the radome 12 having a hemispherical shape is an antenna unit 10, a driving motor 18, a control board unit (not shown), satellite tracking signal coupled to a predetermined angle. A generator (not shown) is mounted. Here, the control board (not shown) is driven by transmitting a motor drive signal to the drive motor 18, to drive the pulley 16 coupled to the drive shaft 17 of the drive motor 18. In addition, the rotation force generated by driving the pulley 16 transmits the timing belt 16 to the fixed pulley 13 to rotate the rotating body 15.

On the other hand, the frequency used by the satellite has various bands such as X band, L band, and K band according to the use purpose, and the dual band broadcasting frequency uses K band (divided into KA band and KU band). At present, Korea's Mugunghwa No. 3 satellite service is divided into 12.2 12GHz satellite broadcasting service and 12.2 122.7GHz communication service.

Therefore, in order to receive various broadcast services provided at home and abroad by using the conventional satellite antenna system for mobile reception, there is a limit in expanding the scope of application for mobile reception because the system must be provided for each repeater.

The present invention focuses on the above points, and is a mobile channel multi-channel satellite antenna for receiving two or more satellite signals received at different frequencies and polarization according to a value selected from a satellite receiver mounted on a moving object such as a vehicle. To provide that purpose.

1 is a cross-sectional view schematically showing an example of a conventional satellite antenna,

2 is a cross-sectional view schematically showing the main part of a satellite antenna according to the present invention;

3 is a block diagram showing a circuit connection of a satellite antenna according to the present invention;

4 is a schematic diagram showing a satellite antenna according to a modification of the present invention;

5 is a schematic diagram showing a satellite antenna according to another modification of the present invention.

Explanation of symbols on the main parts of the drawings

20: antenna portion 22: casing

24: rotary joint 25: swivel

26: gyro sensor 28, 48: drive motor

30: controller 32: selection

34: signal distribution unit 35: central processing unit

38: motor drive part 45: hinge shaft

In order to achieve this object, the present invention is constructed by using a rotary table 25 in a casing 22, and in a satellite antenna for outputting a broadcast signal of a satellite to a satellite receiver: a uniform interval on the rotary table 25 A plurality of antenna unit 20 arranged in the; A gyro sensor 26 installed inside the casing 22 to generate a signal according to the positional movement of the movable body; A controller 30 which is selectively received by the antenna unit 20 on one side and corrects the position of the selected antenna unit 20; And driving means for varying the position of the antenna unit 20 so as to track the satellite according to the signal of the controller 30.

The controller 30 includes at least a selector 32, a signal distributor 34, a central processor 35, a motor driver 38, and inputs satellite signals of the antenna unit 20 selected by the satellite receiver. And output to the drive means to maintain the directivity of the antenna unit 20.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment according to the present invention.

2 is a cross-sectional view schematically showing the main part of the satellite antenna according to the present invention, Figure 3 is a block diagram showing the circuit connection of the satellite antenna according to the present invention.

The present invention is constructed by using the rotating table 25 in the casing 22, and relates to a satellite antenna for outputting the broadcast signal of the satellite to the satellite receiver. The present invention is a satellite antenna utilized in a mobile body such as a vehicle, the hemispherical casing 22 is easy to attach to a vehicle or the like. The rotating table 25 installed inside the casing 22 has a structure rotatable so that the antenna unit 20 to be described later tracks satellites. Such a casing 22 and the rotating table 25 can utilize a known technique.

According to the present invention, a plurality of antenna units 20 arranged at uniform intervals on the swivel table 25 are used. The antenna unit 20 receives a satellite signal from the satellite and converts the satellite signal into an intermediate frequency. In Korea, satellites have an angle of inclination of about 45 with respect to the horizontal plane, and therefore, beam angle of about 45 is given to fix the microstrip array antenna flat. Of course, it is not necessarily limited to this method, and in either case, minimizing the control of the elevation angle is advantageous in terms of simplicity of the system. 2 illustrates that two antenna units 20 are symmetrically installed on a swivel table 25.

In addition, according to the present invention, the gyro sensor 26 is installed inside the casing 22 to generate a signal according to the positional movement of the movable body. The gyro sensor 26 always uses a method of pointing to true north, and an X-axis detection function for detecting a search angle of a moving object is essential. Of course, it may further include a Y-axis detection function for detecting the wave angle of the moving object.

In addition, according to the present invention, there is provided a controller 30 selectively receiving at the antenna unit 20 on one side and correcting the position of the selected antenna unit 20. The controller 30 is mounted on the rotating table 25 together with the antenna unit 20. The rotary joint 24 is used to input and output signals while supplying power to the antenna unit 20 and the controller 30. The selective reception function and the position correction function by the controller 30 will be described later.

In addition, according to the present invention is provided with a drive means for varying the position of the antenna unit 20 to track the satellite in accordance with the signal of the controller 30. In this case, the driving means includes a drive motor 28 fixed to the casing 22, a worm gear 28a coupled to the rotating shaft of the drive motor 28, and a worm wheel fixed coaxially to the lower end of the swivel 25. 25a). When the worm wheel 25a and the worm gear 28a are engaged with each other, the swivel table 25 rotates forward or reverse when the driving motor 28 is driven. The drive motor 28 uses a servo motor, but may also use a stepping motor. By using this method, the configuration is relatively simple, and the reverse phenomenon in which the swivel table 25 arbitrarily rotates due to the vibration of the vehicle while the driving motor 28 is stopped can be prevented.

In this way, if a plurality of antenna units 20 are provided and selectively processed, various satellite broadcasts having different frequency bands and horizontal / vertical polarizations can be provided in one system.

3, the controller 30 of the present invention includes at least a selector 32, a signal distributor 34, a central processor 35, a motor driver 38, and an antenna unit 20 selected as a satellite receiver. Inputs the satellite signal and outputs it to the driving means to maintain the directivity of the antenna unit 20. The antenna unit 20 converts the satellite signal frequency through a low noise block down converter (LBN). Although not shown, the satellite receiver is provided with a switch for selecting a channel and a display for displaying an operation state. The selector 32 selectively inputs signals from both antenna units 20. The signal distributor 34 includes a satellite broadcast tuner and transmits the converted broadcast signal to the satellite receiver. The motor drive 38 includes a module for rotating the drive motor 28 in the forward and reverse directions. The central processing unit 35 which collectively controls these main functional units also includes a memory for storing and managing data for controlling the direction of the antenna.

In operation, when the user selects a specific channel from the satellite receiver, the controller 30 causes only the signal of the antenna unit 20 on one side selected by the selector 32 to be input, and the input signal is a signal distribution unit 34. ) Is output to the satellite receiver via the rotary joint 24. The satellite tracking signal, which detects the position of the satellite through the filter and the signal converter, is separated. The controller 30 inputs the signal from the gyro sensor 26 and the above-described tracking signal, compares the set data with the set data, and outputs the corresponding value to the motor driver 38.

Figure 4 is a schematic diagram showing a satellite antenna according to a modification of the present invention, based on a plan view and part of the enlarged front view.

This is to control the elevation angle of the antenna unit 20, the antenna unit 20 is mounted to the rotating table 25 through the hinge shaft 45 to be rotatable. The hinge shaft 45 has a hinge shape formed of two plates and a connecting pin, and the connecting pin at this time is coupled to rotate integrally with the connecting plate on one side. The hinge shaft 45 is fixed at one end with a worm wheel 48a, and meshes with the worm gear 48a of the drive motor 48 mounted on the bottom surface of the swivel 25. 4 has a disadvantage in that the configuration is somewhat complicated and the price of the product is increased, while it is advantageous to minimize the loss of the direction of the antenna in an environment where the attitude of the moving body changes rapidly, thereby maintaining high quality.

Of course, a circuit is added to the motor driver 38 of FIG. 3 to control the elevation angle, and the program of the central processing unit 35 needs to be partially modified. Although not shown, by utilizing other means for converting the rotational motion into a linear lifting and lowering motion, it is possible to simultaneously control the two antenna units 20 with one driving motor 48.

5 is a schematic view showing a satellite antenna according to another modified embodiment of the present invention.

This is a configuration in which the three antenna unit 20 on the swivel 25 at equal intervals, most of the configuration can maintain the same as the above-described Figs. The configuration of FIG. 4 may be employed for the control of the elevation angle. This enables extensive satellite tracking control, but consumes a lot of power due to unnecessary movements and requires careful design in terms of response speed and stability.

The present invention is expected to contribute to the development of mobile reception, as it can receive two or more satellite signals with different frequencies and polarizations depending on the value selected from the satellite receiver mounted on a mobile body such as a vehicle.

Claims (3)

In the satellite antenna which is configured by using the rotating table 25 in the casing 22, and outputs the satellite broadcast signal to the satellite receiver: A plurality of antenna units 20 arranged at uniform intervals on the swivel table 25; A gyro sensor 26 installed inside the casing 22 to generate a signal according to the positional movement of the movable body; A controller 30 which is selectively received by the antenna unit 20 on one side and corrects the position of the selected antenna unit 20; And Driving means for varying the position of the antenna unit 20 to track the satellite in accordance with the signal of the controller 30, characterized in that it comprises a multi-channel satellite antenna for mobile reception. The method of claim 1, The controller 30 includes at least a selector 32, a signal distributor 34, a central processor 35, a motor driver 38, and inputs satellite signals of the antenna unit 20 selected by the satellite receiver. And output to the driving means to maintain the directivity of the antenna unit 20. The method of claim 1, The drive means includes a drive motor 28 fixed to the casing 22, a worm gear 28a coupled to the rotating shaft of the drive motor 28, and a worm wheel 25a fixed coaxially to the lower end of the swivel 25. Multi-channel satellite antenna for mobile reception, characterized in that it comprises a).