JP4027333B2 - ANTENNA DEVICE AND ITS ASSEMBLY METHOD - Google Patents

Description

  The present invention relates to an antenna that transmits or receives microwaves using a broadcasting satellite or a communication satellite, and more particularly, to an antenna device that supports a primary radiator at a predetermined position and posture with respect to a parabolic reflector. The present invention relates to a structure and an assembling method.

For example, an antenna device for satellite communication for receiving radio waves from a communication satellite includes a parabolic reflector (9) having a reflecting surface (91) made of a rotating paraboloid, and a parabolic reflector as shown in FIG. A primary radiator (2) installed at the focal position F of the reflecting surface (91) of (9), a converter for applying polarization to the radio waves collected by the primary radiator (2), a transmission / reception circuit, etc. A built-in outdoor unit (3) and a support mechanism (92) for supporting the primary radiator (2) and the outdoor unit (3) in a predetermined position and posture with respect to the parabolic reflector (9); The whole is supported by the column (4).
In order to efficiently guide the radio wave received by the reflecting surface (91) of the parabolic reflector (9) to the primary radiator (2), the primary radiator (2) is positioned at the focal point of the parabolic reflector (9). It is necessary to accurately define the posture toward the reflecting surface (91).

By the way, in an antenna apparatus having a large antenna diameter, the primary radiator (2), the outdoor unit (3), and the parabolic reflector (9) are disassembled and transported to the site where the antenna is to be installed. These are assembled.
In this case, it is necessary to accurately adjust the position and orientation of the primary radiator (2) at the installation site.

  Therefore, conventionally, in the assembly using the support mechanism (92), from the primary radiator (2), one end (long axis diameter end) of the long axis diameter GG ′ (93) of the parabolic reflector (9) Measure the distance to both ends (short axis diameter end) of the short axis diameter H-H '(94), and within the adjustable range of the support mechanism (92) so that these measurement distances become a predetermined value The position of the primary radiator (2) was adjusted.

However, the conventional assembly method cannot adjust the attitude of the primary radiator (2), resulting in a problem of low assembly accuracy. In particular, as the antenna diameter increases, the directivity of the antenna becomes very sharp, and a decrease in assembly accuracy related to the attitude of the primary radiator (2) has caused a large loss.
An object of the present invention is to provide an antenna device structure and an assembling method capable of accurately adjusting the position and posture of a primary radiator.

The antenna device according to the present invention includes a parabolic reflector (1), a primary radiator (2) installed at a focal position F of the parabolic reflector (1), and a primary with respect to the parabolic reflector (1). A support mechanism (40) for supporting the radiator (2) in a predetermined position and posture is provided.
The support mechanism (40) is provided with a light source mounting structure for emitting a light beam along the central axis of the primary radiator (2) at the installation position of the primary radiator (2).

In assembling the antenna device of the present invention, the position and orientation of the primary radiator (2) are adjusted within the adjustable range of the support mechanism (40), for example, with the support mechanism (40) tightened. I can do it.
In the adjustment, a light source is attached to the installation position of the primary radiator (2) of the support mechanism (40), and a light beam is emitted from the light source along the central axis of the primary radiator (2). As a result, a beam spot of the light beam is formed on the reflecting surface (11) of the parabolic reflector (1). Therefore, the position of the beam spot matches the position T where the central axis of the primary radiator (2) installed at a predetermined position and posture intersects the reflecting surface (11) of the parabolic reflector (1). The support position of the primary radiator (2) by the support mechanism (40) is adjusted.

Here, the light beam from the light source is reflected toward the focal position F of the parabolic reflector (1) so as to coincide with the crossing point T on the reflecting surface (11) of the parabolic reflector (1). The reflecting part (18) is formed, and the supporting state (position and posture) of the supporting mechanism (40) with respect to the primary radiator (2) is adjusted so that the beam spot is irradiated to the reflecting part (18). Then, accurate adjustment is possible.
The light beam reflected by the reflecting section (18) is irradiated on the front surface of the light source. Therefore, by adjusting the support state (position and posture) of the support mechanism (40) relative to the primary radiator (2) so that the irradiation position of the reflected light beam coincides with the center position of the front surface of the light source, Adjustment is possible.

In a specific configuration, the light source mounting structure includes a dummy (25) that has the same outer shape as the primary radiator (2) and can be mounted at the primary radiator installation position of the support mechanism (40). In addition, a structure in which a light source is attached in the same direction as the primary radiator (2) can be adopted for the dummy (25).
According to the mounting structure, in the process of adjusting the position and posture of the primary radiator (2) by the support mechanism (40) by emitting a light beam from the light source attached to the dummy (25), the dummy (25) Can be used as a target of the irradiation position of the reflected light beam.

  According to the antenna device and the assembling method thereof according to the present invention, the position and posture of the primary radiator with respect to the parabolic reflector can be accurately adjusted.

  The first embodiment (configuration example related to the present invention) shown in FIGS. 1 to 7 and the second embodiment (configuration example of the present invention) shown in FIGS.

First Embodiment As shown in FIG. 1, the antenna device of the present embodiment includes a parabolic reflector (1) having a reflecting surface (11) composed of a rotating paraboloid and a reflecting surface (11) of the parabolic reflecting mirror (1). The outdoor unit (3) with a built-in primary radiator (2) installed at the focal position F), a converter for polarizing the radio wave collected by the primary radiator (2), a transmission / reception circuit, etc. And a support mechanism (40) for supporting the primary radiator (2) and the outdoor unit (3) in a predetermined position and posture with respect to the parabolic reflector (1), and the whole is supported by the support column (4). Has been.

  The support mechanism (40) is connected to the upper end of the support column (4) to support the parabolic reflector (1) from the back, and a pair of back support members (41) (41) and both back support members (41) ( 41) connecting the lower ends of each other to support the parabolic reflector (1) from below, and the support units for the outdoor unit (3) from the lower ends of both rear support members (41) and (41) A pair of support arms (42) and (42) extending to (43) and a pair of stays (44) and (44) extending from both ends of the parabolic reflector (1) to the support base (43).

As shown in FIG. 5, a plurality of bolt holes (8), (8) and (8) are opened in the support base (43), and a plurality of bolts (7), (7) and (7) are connected to these bolt holes (8 The outdoor unit (3) is fixed on the support base (43) by penetrating the outdoor unit (3) on the support base (43) through the through-holes 8) and 8). .
Further, as shown in FIG. 6, bolt holes (81) and (82) are formed in the tip portions of the stays (44) and the support base (43), respectively, and the bolts (71) are connected to these bolt holes (81) (82). ) And the nut (75) is screwed to the end thereof, whereby the stay (44) is connected to the support base (43).

Further, as shown in FIG. 7, a fixing bracket (47) is fixed to the base end portion of each support arm (42), and a bolt hole (48) is opened in each of the support arm (42) and the fixing bracket (47). At the same time, two bolt holes (83) and (83) are opened at the front end of the back support member (41), and the two bolts (72) and (72) are connected to these bolt holes (83) and (83). (48) Passing through (48), and the nut (76) (76) is screwed to the tip, the tip of the back support member (41) is connected to the base end of the support arm (42). The
The connection between other members is also performed using a similar bolt fastening mechanism.

  The bolt holes through which the bolts are to be penetrated are opened with appropriate play with respect to the outer diameter of the bolt, and the position and orientation of the primary radiator (2) are utilized as described later by using the play. It is possible to make adjustments. Here, if each bolt hole is opened in a long hole, the adjustment range can be expanded.

  As shown in FIG. 1, the parabolic reflector (1) has a major axis diameter (15) obtained by projecting the major axis diameter GG ′ on the reflecting surface (11) and a minor axis diameter HH ′ as the reflecting surface. The position where the minor axis diameter (16) projected on (11) intersects, that is, the central axis (waveguide direction) when the primary radiator (2) is installed at the correct position and orientation is the reflecting surface A through-hole (12) having an inner diameter (for example, about 5 mm) through which a light beam can pass is opened at a position T intersecting with (11), and the rear surface of the parabolic reflector (1) is shown in FIG. As described above, the receiving tube portion (13) of the laser pointer (5) from which the laser beam (51) should be emitted from the through hole (12) of the parabolic reflector (1) toward the focal position F of the reflecting surface (11) is formed. ing.

In assembling the antenna device, first, using the support mechanism (40), the primary radiator (2) and the outdoor unit (3) are temporarily mounted on the parabolic reflector (1) as shown in FIG. Stop and fix.
Further, as shown in FIG. 2, a laser pointer (5) is attached to the accommodating cylinder (13) of the parabolic reflector (1) to emit laser light (51).
Further, as shown in FIG. 3, a reflecting plate (6) made of a metal plate or the like is provided on the surface (horn opening surface) of the primary radiator (2) facing the parabolic reflector, and the primary radiator (2). A mark (61) is provided on the surface of the reflecting plate (6), which is attached perpendicularly to the central axis, at a position through which the central axis of the primary radiator (2) passes.

As shown in FIG. 4, the laser beam (51) emitted from the laser pointer (5) passes through the through-hole (12) of the parabolic reflector (1) and passes through the parabolic reflector (1) of the primary radiator (2). ), That is, the reflecting plate (6) shown in FIG. 3, and forms a beam spot.
Here, when the mounting position of the primary radiator (2) is deviated, the beam spot is formed deviated from the mark (61) of the reflector (6). Therefore, the position of the primary radiator (2) is adjusted so that the beam spot overlaps the mark (61).

The position adjustment is performed by loosening the bolt (7) shown in FIG. 5 and swinging the outdoor unit (3) in the direction of arrow A and moving back and forth in the direction of arrow B along the swing surface. It is possible to perform the adjustment by loosening the bolt (71) and adjusting the support base (43) to swing in the direction of arrow C on the vertical plane.
In addition to or in place of the above adjustment, the bolt (72) shown in FIG. 7 is loosened, and the support arms (42) and (42) are swung in the directions of arrows C and D perpendicular to each other. It is also possible to make the same adjustment.

The laser beam (51) incident on the reflector (6) of the primary radiator (2) is reflected by the reflector (6), and the reflected laser beam (52) is parabolic reflecting mirror (see FIG. 4). A beam spot (53) is formed on the reflecting surface (11) of 1).
Here, when the mounting posture of the primary radiator (2) is deviated, the spot (53) is formed at a position deviated from the through hole (12) of the parabolic reflector (1). Therefore, the attitude of the primary radiator (2) is adjusted so that the reflected laser beam (52) returns to the through hole (12).
In the posture adjustment, the bolt (7) shown in FIG. 5 and the bolt (71) shown in FIG. 6 are loosened and the primary radiator (2) is swung in two directions orthogonal to each other as in the above-described position adjustment. Can be done. It is also possible to loosen the bolt (72) shown in FIG. 7 and swing the primary radiator (2) in two directions orthogonal to each other.

The above-described position adjustment and posture adjustment are repeated as necessary to gradually converge the adjustment error to zero. Finally, the bolts (7) (71) (71) of the support mechanism (40) are tightened to fix the outdoor unit (3).
As a result, the primary radiator (2) is installed in an accurate position and posture.
The laser pointer (5) and the reflector (6) are removed because they are not required after assembly adjustment.

Second Embodiment As shown in FIG. 8, the antenna apparatus of the present embodiment includes a support mechanism (40) having the same configuration as that of the first embodiment. By the support mechanism (40), the parabolic reflector (1) is provided. Is supported, and the primary radiator and the outdoor unit can be supported in a predetermined position and posture with respect to the parabolic reflector (1).
In FIG. 8, a primary radiator dummy (25) is attached in place of the primary radiator to adjust the support state of the primary radiator by the support mechanism (40).
The dummy (25) is attached to the frame (49) fixed to the support base (43) of the support mechanism (40), and is installed at the focal position F of the parabolic reflector (1).

  As shown in FIGS. 11 and 12, the primary radiator (2) and the outdoor unit (3) constituting the antenna device are connected to each other by using a plurality of bolts (22), and as shown in FIG. It is attached to a frame (48) fixed on a support base (43) of the support mechanism (40). As shown in FIG. 12, the outdoor unit (3) is equipped with a transmission / reception circuit (31) and the like, and the microwave generated by the outdoor unit (3) is a primary radiator (2) as indicated by a broken line. Is emitted from the front.

On the other hand, the dummy (25) has the same outer shape as the primary radiator (2) as shown in FIGS. 13 (a), (b) and (c), and has a central hole (27) on the front surface thereof. It has a cover (26), is installed through the vertical wall (49a) of the frame (49), and is attached to the vertical wall (49a) of the frame (49) using a plurality of bolts (29). Fixed.
A laser pointer (5) is attached to the axis of the dummy (25), and laser light (51) is emitted from the laser pointer (5) forward through the central hole (27) of the front cover (26). Is possible.
If the front cover (26) of the dummy (25) is formed of a transparent sheet, the formation of the central hole (27) can be omitted.

  As shown in FIGS. 8 and 9, the parabolic reflector (1) reflects the laser beam (51) from the laser pointer (5) at the same position T as the through hole (12) in the first embodiment. A planar reflecting portion (18) for irradiating the reflected light (52) to the focal position F of the parabolic reflector (1) is formed.

In assembling the antenna device, first, as shown in FIG. 8, the dummy (25) and the laser pointer (5) are attached to the support base (43) of the support mechanism (40) via the frame (49), Laser light (51) is emitted from the pointer (5). As a result, a beam spot is formed on the reflecting surface (11) of the parabolic reflector (1).
Here, when the mounting position and / or mounting posture of the dummy (25) by the support mechanism (40) is deviated, the beam spot is formed deviated from the position of the reflecting portion (18) of the parabolic reflector (1). The Rukoto. Therefore, the support position and the support posture of the dummy (25) by the support mechanism (40) are adjusted so that the beam spot is irradiated to the reflection part (18).

The laser beam (51) incident on the reflecting portion (18) of the parabolic reflector (1) is reflected by the reflecting portion (18), and the reflected light (52) is applied to the front surface of the dummy (25) as shown in FIG. To form a beam spot.
Here, when the mounting position and mounting posture of the dummy (25) by the support mechanism (40) are misaligned, the beam spot of the reflected light (52) is formed at the position of the central hole (27) of the dummy (25). It will not be shifted. Therefore, the support position and support posture of the dummy (25) by the support mechanism (40) are adjusted so that the reflected laser beam (52) is irradiated to the position of the central hole (27) of the dummy (25).

  The position adjustment and the posture adjustment described above can be performed by loosening each bolt of the support mechanism (40) and changing the support state by the support mechanism (40), as in the first embodiment.

The above-described position adjustment and posture adjustment are repeated as necessary, the adjustment error is gradually converged to zero, and then the bolts (7) (71) (71) of the support mechanism (40) are tightened. As a result, the support mechanism (40) is fixed in a support state capable of supporting the primary radiator (2) in an accurate position and posture.
Next, the dummy (25) and the laser pointer (5) are removed together with the frame (49) from the support base (43) of the support mechanism (40), and the support base (43) of the support mechanism (40) is removed as shown in FIG. Is attached with a primary radiator (2) and an outdoor unit (3) through a frame (48).
As a result, the primary radiator (2) is installed in an accurate position and posture.

  In the above-described adjustment operation, the weight (33) having the same weight as the outdoor unit (3) is attached to the frame (49) as shown in FIG. Thus, higher adjustment accuracy can be obtained.

  As described above, according to the antenna device and the assembling method thereof according to the present invention, the position and orientation of the primary radiator (2) can be adjusted with high accuracy even in the assembly at the installation site, thereby improving the antenna efficiency. Can be maximized.

  Each part configuration of the present invention is not limited to the above embodiment, and various modifications can be made within the technical scope described in the claims. For example, the adjustment of the position and orientation of the primary radiator (2) is not limited to the configuration that is performed within the range of play of the support mechanism (40), and can be performed by providing a dedicated adjustment mechanism.

It is a perspective view of the antenna apparatus in 1st Example. It is sectional drawing which shows the principal part of a parabolic reflector. It is a perspective view which shows the reflecting plate attached to the primary radiator. It is a perspective view which shows the advancing path | route of the laser beam radiate | emitted from the laser pointer. It is a perspective view which shows the connection mechanism between a support stand and an outdoor unit among support mechanisms. It is a perspective view which shows the connection mechanism between a support stand and a stay among support mechanisms. It is a perspective view which shows the connection mechanism between a back surface support member and a support arm among support mechanisms. In 2nd Example, it is a perspective view which shows the advancing path | route of the laser beam radiate | emitted from the laser pointer. It is sectional drawing of the reflection part formed in the parabolic reflector. It is a side view of the state which supported the primary radiator and the outdoor unit on the support stand. It is a side view of the state which decomposed | disassembled the primary radiator and the outdoor unit. It is sectional drawing of a primary radiator and an outdoor unit. It is a figure which shows the side surface (a) of the primary radiator and outdoor unit attached to the frame, the side surface (a) and the cross section (c) of the dummy and laser pointer attached to the frame. It is a figure which shows the state which attached the weight to the flame | frame. It is a perspective view which shows the conventional antenna device.

Explanation of symbols

(1) Parabolic reflector
(11) Reflecting surface
(12) Through hole
(13) Housing cylinder
(18) Reflector
(2) Primary radiator
(25) Dummy
(3) Outdoor unit
(4) Prop
(40) Support mechanism
(41) Back support member
(42) Support arm
(43) Support base
(44) Stay
(45) Connecting member
(48) Frame
(49) Frame
(5) Laser pointer
(51) Laser light
(52) Reflected laser light
(53) Beam spot
(6) Reflector
(61) Mark

Claims (4)

A parabolic reflector (1), a primary radiator (2) installed at the focal position F of the parabolic reflector (1), and a primary radiator (2) for the parabolic reflector (1) In the antenna device provided with a support mechanism (40) for supporting the position and posture, the support mechanism (40) includes the center of the primary radiator (2) at the installation position of the primary radiator (2). A light source mounting structure for emitting a light beam along the axis is provided, and a primary radiator (2) installed at a predetermined position and posture on the reflecting surface (11) of the parabolic reflector (1). ) Is formed at a position T where the central axis intersects the reflecting surface (11) of the parabolic reflector (1) to reflect the light beam from the light source toward the focal position F. antenna apparatus characterized by being.   The light source mounting structure has a dummy (25) which has the same outer shape as the primary radiator (2) and can be mounted at the primary radiator installation position of the support mechanism (40). The antenna device according to claim 1, wherein a light source is attached to the primary radiator (2) in the same direction as the primary radiator (2). In the assembling method of the antenna device in which the primary radiator (2) is supported by the support mechanism (40) at a predetermined position and posture so as to face the parabolic reflector (1), the reflecting surface of the parabolic reflector (1) (11) includes a primary radiator (2) at a position T where the central axis of the primary radiator (2) installed at a predetermined position and posture intersects the reflecting surface (11) of the parabolic reflector (1). 2) A reflection part (18) for reflecting the light beam emitted from the installation position toward the focal position F of the parabolic reflector (1) is formed, and 1 from the installation position of the primary radiator (2). A light beam is emitted along the central axis of the secondary radiator (2), and a beam spot of the light beam is formed on the reflection part (18), and the light beam reflected by the reflection part (18) A method of assembling an antenna device, wherein the support state of the support mechanism (40) with respect to the primary radiator (2) is adjusted so as to return to the focal position F. In place of the primary radiator (2), a dummy (25) having the same external shape as the primary radiator (2) is attached to the support mechanism (40) at the primary radiator installation position. The method of assembling an antenna device according to claim 3, wherein the light source is attached to 25) .

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