JPH10112603A - Radiator attachment body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To point the beams radiated from two radiators to two satellites respectively by a simple operation. SOLUTION: A 1st radiator 10 is fixed to a support metallic parts 15, and a mobile metallic parts 16 is fixed to the parts 15 so as to turn around the radiator 10. A mount metallic parts mounting a paraboloidal reflector on a support is unfastened, so that the beam of the radiator 10 is pointed to one of two satellites. Then a fixing bolt 22 is unfastened and the parts 16 is turned, so that the beam of a 2nd radiator 12 is pointed to the other satellite. Thus, the beams of both radiators 10 and 12 are pointed to both satellites respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiator mount provided in a multi-beam antenna for receiving radio waves transmitted from two satellites.

[0002]

2. Description of the Related Art At present, a plurality of broadcasting satellites have been launched. In order to receive radio waves from a plurality of broadcasting satellites, a satellite broadcasting receiving antenna is installed for each broadcasting satellite. For this reason, a plurality of satellite broadcasting antennas are required, and a large installation area is required. In order to solve this, a multi-beam antenna as described in JP-A-6-69722 has been proposed. FIG. 5A shows the configuration of this multi-beam antenna.
(B). FIG. 5A is a front view of the multi-beam antenna, and FIG. 5B is a side view thereof.

The multi-beam antenna shown in FIGS. 5A and 5B has a parabolic reflector 124 and a parabolic reflector 12.
Radiator mounting arm 117 having one end fixed to radiator 4 and mounting body 101 fixed to the other end of radiator mounting arm 117
And the first radiator 102 and the second
And a radiator 107. The radiator mounting arm 117 is reinforced by two stays 125 and fixed to the parabolic reflector 124.

[0004] The multi-beam antenna having such a configuration is fixed to the mast 126 by a mast fixing bracket 127. When fixing the multi-beam antenna to the mast 126, the azimuth fixing bolt 128 provided on the mast fixing bracket 127 is loosened, and the multi-beam antenna is directed to the azimuth where the satellite is located. Loosen and point the multi-beam antenna in the elevation direction where the satellite is located. Then, by tightening the elevation fixing bolt 129 and the azimuth fixing bolt 128, the multi-beam antenna is directed toward the satellite.

Next, a mounting body 101, a first radiator 102,
FIG. 6 and FIG.
6 is a perspective view thereof, and FIG. 7 is a front view thereof. In these figures, a base member 115 is fixed to a tip of a radiator mounting arm 117 by a mounting bolt. The mounting body 101 is rotatably fixed to the base member 115. In this case, the center of rotation is the pivot portion 111. When the mounting body 101 is rotated with respect to the base member 115, the elevation angle stator 112 slides in an arc-shaped groove 131 formed in the mounting body 101. Become like Therefore, the mounting body 10 is set so that the elevation difference display scale displayed near the arc-shaped groove 131 becomes the elevation difference of the city in which the multi-beam antenna is installed at the position of the elevation stator 112.
1 to tighten the elevation angle stator 112.

Next, the azimuth fixing bolt 128 and the elevation fixing bolt 129 are loosened to finely adjust the azimuth and elevation of the multi-beam antenna, and the first radiator 102 transmits the two satellites from the higher one of the two satellites. Adjust to receive the best radio wave. Then, the fastening means 114 is loosened to move the movable table 106 to which the second radiator 107 is fixed.
Is adjusted vertically so that the radio wave transmitted from the other satellite by the second radiator 107 can be best received. At this time, the fastening means 114 slides in the elongated hole 132 formed in the bent portion of the attachment body 101. After the adjustment, the fastening means 114 is tightened. Thereby, the first radiator 1
The second radiator 107 and the second radiator 107 can receive radio waves transmitted from different broadcast satellites.

[0007]

As described above, in the conventional multi-beam antenna, two radiators are transmitted from two satellites with their mounting positions adjusted with the focal point of the parabolic reflector as the center. Radio waves can be received. That is, it is necessary to arrange the two radiators with an interval corresponding to the degree of separation between the two receiving satellites and an elevation difference generated at reception points nationwide. For this reason, in the conventional multi-beam antenna, it is necessary that the elevation angle difference between the satellites and the elevation angle difference due to the scale indicating the reception point displayed on the support means supporting the radiator match.
There has been a problem that it is impossible to display on a support means all elevation differences between two satellites at reception points nationwide. Further, since the rotation angle of the radiator is set with reference to the scale where all the receiving points are not attached, the radiator cannot be accurately fixed, and adjustment for the best reception becomes complicated. At the same time, there is a disadvantage that the adjustment structure becomes complicated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a radiator mounting body which can easily adjust two radiators so as to perform the best reception and has a simple adjustment structure.

[0009]

In order to achieve the above object, a radiator mounting body according to the present invention is a radiator mounting body located near a focal position of a parabolic reflector, which is fixed to the parabolic reflector. And the first arm
A movable bracket fixedly rotatably fixed to the support bracket, comprising a support bracket to which the converter is fixed, a converter mounting portion to which the second radiator is fixed, and an arm extending from the converter mounting portion; A first arc-shaped groove and a second arc-shaped groove are formed in the arm portion of the movable bracket, and are slidably engaged with the first arc-shaped groove and the second arc-shaped groove, respectively. The movable fitting is rotatable with respect to the support fitting by fixing the first engaging means and the second engaging means to the support fitting. The center of the two arc-shaped grooves is the first
It matches the center of the radiator.

Further, in the radiator mounting body, the first engaging means slidably engaging with the first arc-shaped groove is semi-fixed to the first arc-shaped groove, and The engaging means is capable of being tightened against the second arc-shaped groove.
Further, the second arc-shaped groove is formed in the vicinity of the converter mounting portion, and the scale of the reception area indicating portion is marked along the second arc-shaped groove.

According to the present invention, after the first radiator is adjusted so that the radio wave transmitted from one of the satellites having a high elevation angle to be received by the first radiator can be received in the best condition, the first radiator is adjusted.
By simply rotating the movable bracket around the radiator, the second
Adjustments can be made so that radio waves transmitted from the other satellite from which the radiator is to be received can be best received. Therefore, the first radiator and the second radiator can be easily adjusted so that the radio waves transmitted from the two satellites can be received in the best condition.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1A and 1B show a configuration example of a multibeam antenna having a radiator mounting body according to the present invention. FIG. 1A is a front view of a multi-beam antenna, and FIG. 1B is a side view thereof. FIG. 1 (a) (b)
The multi-beam antenna shown in FIG.
An arm 3 having one end fixed to the parabolic reflector 1, a radiator mount 4 according to the present invention to which two radiators fixed to the other end of the arm 3 are attached, and the radiator mount 4 fixed to the radiator mount 4 It comprises a first radiator 10 and a second radiator 12. The multi-beam antenna is an offset parabolic antenna.

The multi-beam antenna having such a configuration is fixed to the column 2 by the mounting bracket 5. When fixing the multi-beam antenna to the column 2, the mast mounting bolt 7 provided on the side surface of the mounting bracket 5 is loosened, and the multi-beam antenna is directed to the direction in which the satellite is located. Loosen and point the multi-beam antenna in the elevation direction where the satellite is located. Then, by tightening the elevation adjustment bolt 6 and the mast mounting bolt 7, the multi-beam antenna can be directed toward the satellite.

Next, the structure of the radiator mounting body 4 according to the present invention is shown in detail in FIGS. 2 to 4. FIG. 2 is a front view of the radiator mounting body 4, FIG. FIG. 4 is a side view of the radiator mounting body 4. As shown in these drawings, an arm mounting portion 21 integrated with the support fitting 15 is fitted to the tip of the arm 3 having one end fixed to the parabolic reflector 1, and the support fitting 15 is fixed to the arm 3. I have. The first radiator 10 in which the first converter 11 is integrated is fixed to the support fitting 15.

A movable bracket 16 is rotatably fixed to the support bracket 15. A second converter 13 integrated with the second radiator 12 is fixed to a converter mounting portion 16-2 formed at one end of the movable bracket 16 by two power supply portion fixing bolts 23. Further, the arm 16-1 extending from the converter mounting portion 16-2 has a second arc-shaped groove B near the converter mounting portion 16-2.
And a first arc-shaped groove A is formed near the tip of the arm portion 16-1. A fixing bolt 22 is slidably engaged with the second arc-shaped groove B, and the fixing bolt 22 is
5 is screwed. In addition, a scale of a reception area indicating portion indicating an area where the multi-beam antenna is installed is provided along the second arc-shaped groove B.

A bolt 15-2 is slidably engaged with a first arc-shaped groove A formed at the tip of the arm 16-1.
It is stuck to. Bolts 15-
FIG. 3 shows a state in which 2 is engaged. As shown in FIG. 3, a ring-shaped projection 15-1 is formed on the support bracket 15 so as to project therefrom. The ring-shaped projection 15-1 is formed in a first arc-shaped groove A formed on the movable bracket 16. It is slidably inserted, and its tip protrudes from the first arc-shaped groove A. Further, a screw is formed inside the ring-shaped protrusion 15-1, and a bolt 15-2 is screwed into the screw. Therefore, even if the bolt 15-2 is tightened to the support bracket 15, the bolt 15-2 can slide in the first arc-shaped groove A, and the movable bracket 16 can rotate with respect to the support bracket 15. .

The first radiator 10 integrated with the first converter 11 is mounted on a radiator fixing table 17 having a mounting groove corresponding to the outer shape of the first radiator 10, and the A radiator holding bracket 18 is coupled to the radiator fixing base 17 by a holding bolt 19 from above. As a result, the first radiator 1 is fixed by the radiator holding bracket 18 and the radiator fixing base 17.
0 is pinched and fixed to the support fitting 15. The radiator fixing base 17 is fixed to the support fitting 15 by a radiator fixing base mounting bolt 20 as shown in FIG. The center of the arc of the first arc-shaped groove A is made equal to the center O of the first radiator 10, and the center of the arc of the second arc-shaped groove B is also made equal to the center O of the first radiator 10. ing. Thus, when the movable metal fitting 16 is rotated, the center of the rotation becomes the center O of the first radiator 10.

Further, the first radiator 10 and the second radiator 12
Is set to a size such that the separation between the two receiving satellites at the receiving points and the separation between the two beams formed by the first radiator 10 and the second radiator 12 match. Furthermore, the signal received by the first radiator 10 is converted into an intermediate frequency by the first converter 11, output from the first connector 11-1 to the tuner, and received by the second radiator 12. The signal is converted to an intermediate frequency by the second converter 13 and output from the second connector 12-1 to the tuner.

Next, a description will be given of a method of adjusting the mounting positions of the two radiators so that the multi-beam antenna having the radiator mounting body 4 configured as described above can receive radio waves transmitted from two satellites. I do. First, the mast mounting bolt 7 of the mounting bracket 5 and the elevation adjusting bolt 6 shown in FIG. 1 are loosened so that the azimuth and elevation of the parabolic reflector 1 are adjusted to match the azimuth and elevation of the satellite. At this time, the azimuth and elevation of the parabolic reflector 1 are adjusted so that the first radiator 10 can receive the radio wave transmitted from the satellite with the higher elevation in the best condition. This adjustment is performed so that the intensity of the signal converted to the intermediate frequency output from the first converter 11 becomes maximum.

Next, the fixing bolt 22 is loosened and the movable bracket 16 is rotated to adjust the second radiator 12 so that the radio wave transmitted from the remaining satellite can be received in the best condition. This adjustment is performed so that the intensity of the signal converted into the intermediate frequency output from the second converter 13 becomes maximum. In addition, by referring to the receiving point marked on the scale of the receiving area marking unit as a guide of the rotation position of the movable bracket 16, the adjustment can be easily performed. When the radiator mounting body 4 according to the present invention is provided, the radio waves transmitted from the two satellites by the first radiator 10 and the second radiator 12 can be received only by performing such simple adjustment. Will be able to

This is because the second radiator 12 is rotated about the fixed first radiator 10 as a center of rotation.
And a second arc-shaped groove B substantially orthogonal to the first arc-shaped groove A,
The first arcuate groove A is used as the center of the rotational movement, and the second arcuate groove B
Is used as a guide for rotational movement, so that the second radiator 12 can be moved stably. The bolt 15-2 is the first
Since the second radiator 12 is semi-fixed to the arc-shaped groove A, the second radiator 12 can be rotationally moved only by loosening the fixing bolt 22 tightened to the second arc-shaped groove B. The range in which the movable bracket 16 can be rotated with respect to the support bracket 15 is an angle range that can sufficiently cover the difference between elevation angles generated when two satellites are received at the receiving point.

Further, the focal point of the parabolic reflector 1 and the positions of the first radiator 10 and the second radiator 12 are adjusted in accordance with the transmission output difference between the two receiving satellites. That is, when the transmission powers of the two satellites are equivalent, the focal point is set to be located between the two radiators, and the performances of the two beams are made the same. If there is a difference in transmission output between the two satellites, a radiator that receives radio waves transmitted from a satellite having a small transmission output is brought closer to the focal point. The degree of this approach is made proportional to the difference in the transmission output of the satellite. As described above, by increasing the gain of the beam that receives a satellite having a small transmission output, the image quality when receiving radio waves transmitted from the two satellites that receive the signal is made equal.

The satellite broadcast received by the first radiator 10 and the second radiator 12 can be any combination of BS broadcast and BS broadcast, BS broadcast and CS broadcast, and CS broadcast and CS broadcast. . At this time, when receiving a linearly polarized wave, the radiator is rotationally adjusted so that the polarization direction of the radiator matches the polarization direction of the radio wave to be received.

[0024]

Since the present invention is configured as described above, the first radiator adjusts the radio wave transmitted from a satellite having a high elevation angle to be received by the first radiator so that the first radiator can receive the radio wave in the best condition. By simply rotating the movable bracket about the radiator, the adjustment can be made so that the radio wave transmitted from the other satellite to receive the second radiator can be best received. Therefore, the first radiator and the second radiator are 2
It can be easily adjusted so that the radio waves transmitted from one satellite can be received in the best condition. Also,
Since the radiator mount has a simple structure with a small number of parts, the cost can be reduced.

[Brief description of the drawings]

1A and 1B are a front view and a side view showing a configuration of a multi-beam antenna including a radiator mounting body of the present invention.

FIG. 2 is a front view showing a configuration of a radiator mounting body according to the present invention.

FIG. 3 is an enlarged view showing a part of a radiator mounting body according to the present invention.

FIG. 4 is a side view showing a configuration of a radiator mounting body according to the present invention.

FIG. 5 is a front view and a side view showing a configuration of a conventional multi-beam antenna.

FIG. 6 is a perspective view showing a configuration of a portion for attaching a radiator in a conventional multi-beam antenna.

FIG. 7 is a front view showing a configuration of a part to which a radiator is attached in a conventional multi-beam antenna.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 parabola reflector 2 support 3 arm 4 radiator mounting body 5 mounting bracket 6 elevation angle adjustment bolt 7 mast mounting bolt 10 first radiator 11 first converter 12 second radiator 13 second converter 15 support bracket 16 movable bracket 17 radiation Radiator fixing base 18 Radiator holding bracket 19 Holding bolt 20 Radiator fixing stand mounting bolt 21 Arm mounting part 22 Fixing bolt 23 Feeding part fixing bolt

Claims (3)

[Claims] 1. A radiator mounting body located near a focal position of a parabolic reflector, comprising: a support fitting fixed to an arm fixed to the parabolic reflector and to which a first radiator is fixed; (2) an arm part of the movable metal fitting, comprising: a converter mounting part to which the radiator is fixed, and an arm part extending from the converter mounting part, the movable metal part being rotatably fixed to the support metal part. A first arc-shaped groove and a second arc-shaped groove are formed in the first arc-shaped groove and the second arc-shaped groove.
The first engagement means and the second engagement means respectively slidably engaging the arc-shaped grooves are fixed to the support fitting, so that the movable fitting is rotatable with respect to the support fitting. The radiator mounting body, wherein the centers of the first arc-shaped groove and the second arc-shaped groove coincide with the center of the first radiator. 2. The first engaging means slidably engaging the first arc-shaped groove is semi-fixed to the first arc-shaped groove, and the second engaging means is slidably engaged with the second arc-shaped groove. 2. The radiator mounting body according to claim 1, wherein the radiator mounting body is capable of being tightened against the arc-shaped groove. 3. The method according to claim 2, further comprising:
The radiator mounting body according to claim 1 or 2, wherein an arc-shaped groove is formed, and a scale of a reception area indicating portion is provided along the second arc-shaped groove.