JPH0287804A - Structure-mounted type planar antenna setting device - Google Patents

Abstract

PURPOSE:To adjust rotation and directions of the azimuthal angle and the elevation angle by providing a direction adjusting mechanism which adjusts the direction of a principal beam of an antenna and a rotation adjusting mechanism which uses the direction perpendicular to the plane plate surface of the antenna as the axis of rotation and rotates the beam in the peripheral direction of this axis. CONSTITUTION:While guides 2 having arcuate grooves 17 are provided on the rear face of a structure contact type planar antenna 1, antenna supporting parts 4 having spherical front ends 18 are attached to a pedestal 3 directly set to a structure and clipped with clipping bodies 5, the front ends 18 are fixedly or movably fitted to grooves 17 2 to set the antenna 1 on the pedestal 3. Since clipping bodies 5 have a freely rotatable structure, and supporting parts can be slided, the direction of the principal beam of the antenna can be adjusted within a certain range of solid angle.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention allows easy adjustment of the main beam angle and side-lunching angle of a structure-adhered flat antenna used for satellite broadcast reception, etc. The present invention relates to the antenna installation device.

(Prior Art) As a type of antenna for transmitting and receiving satellite broadcasting and microwave communication, a planar antenna is used in which a radiation pattern is generally etched on one surface of a dielectric plate or the like. Regarding this planar antenna, in order to be able to attach it as closely as possible to the walls and roofs of houses, etc., and to receive radio waves with maximum efficiency, a beam tilt type planar antenna in which the direction of the emitted radio waves is adjusted by the radiation pattern has been considered. There is. Here, the walls and roof of household -a have an infinite solid angle, and if the solid angle deviates by 2 degrees from the radio wave emission direction, reception will be impossible. In order to achieve close contact, an almost infinite number of radiation patterns are required, and an etching mask is also required accordingly. In order to solve this problem by reducing the radiation pattern, the Y-axis is a straight line passing through the center of a circular or regular hexagonal flat plate and perpendicular to the flat plate as shown in Figure 6 (a) and (b). It has a structure that can rotate in the circumferential direction of the Y-axis with the Y-axis as the rotation axis, and the Y-axis relative to the direction of radio waves with the X-axis as the rotation axis inside the antenna installation case 9 that also serves as a radome, as shown in FIG. 6 (c). A structure-adhered planar antenna has been proposed that has a structure in which the angle α of the antenna can be adjusted.

Also, Utility Model Application No. 62-84207 and Utility Model Application No. 63-
As shown in Japanese Patent No. 15613, an installation device has been proposed in which a mechanism capable of rotation adjustment around the Y-axis and a direction adjustment mechanism for azimuth and elevation angles are integrated.

(Problems to be Solved by the Invention) In the structure-adhesive planar antenna described in FIGS. 6(a), (b), and (c), the Y axis is an axis passing through the center of the planar plate and perpendicular to the planar plate. Regarding a mechanism for adjusting rotation in the circumferential direction of the Y-axis as a rotation axis and a mechanism for adjusting the angle α of the Y-axis with respect to the direction of radio waves, no specific installation device has been proposed to facilitate the above. In addition, Y shown in Figure 6 (a) and (b)
Since the shaft is a rotating shaft and a direction adjustment mechanism in the circumferential direction is not included, the radiation pattern cannot be further reduced.

Furthermore, if the rotating mechanism and the azimuth angle and elevation angle direction adjustment are performed by separate parts, the structure becomes complicated and heavy, making installation and removal difficult.

The present invention provides a structure for easily performing rotation adjustment using the Y-axis as the rotation axis, adjustment of the angle α of the Y-axis, and direction adjustment of the Y-axis in the circumferential direction, and a method for performing these with a simple structure. The purpose is to provide the following.

(Means for Solving the Problems) The structure of the present invention for achieving the above object will be explained using FIGS. 1 to 5 corresponding to embodiments.

As shown in FIG. 1, a guide 2 having an arcuate groove 17 is provided on the back surface of the structure-adhering planar antenna 1. As shown in FIG. next,
As shown in FIG. 2, an antenna support part 4 having a spherical tip shown in FIG.
, 5b, 5c) to integrate them. Then, as shown in Figures 1 and 5, guide 2 is attached to the back.
(2a, 2b) The tip 18 of the support part 4 on which the structure-adhesive flat antenna 1 is mounted on the pedestal 3 is connected to the guide 2.
The guides 2 are installed on the pedestal 3 by inserting them into the grooves 17 from the ends of the guides 2 and fitting them. At this time, the spherical tip 18 has a split pin structure, and by opening and closing the split pin, the fitting state with the guide 2 can be made fixed or movable. Here, the clamping body 5b shown in FIG.
When attaching 5c to the support stand 6, the structure is such that it can be freely rotated by using a bearing or the like on the attachment part. Further, the supporting parts 4b and 4C are assumed to be able to slide in the clamping bodies 5b and 5c.

By adopting the above structure, the structure-adhesive flat antenna 1 can rotate in the circumferential direction with a straight line passing through the center of the flat plate surface and perpendicular to the flat plate surface as the rotation axis, and can rotate at a certain solid angle. It is possible to adjust the solid angle of the Y-axis on a straight line passing through the center of the structure-adhesive flat antenna 1 and perpendicular to the flat plate surface within a certain range, and adjust the main beam direction of the antenna within a certain solid angle range. make it possible to

Further, the functions of the rotational adjustment and the three-dimensional angle direction adjustment can be performed by one component, and the installation device can be simplified.

(Function) According to the above-mentioned means, the fitting structure between the guide having the arcuate groove and the support portion having a spherical tip can slide, so that the antenna can be easily rotated. In addition, the support part can slide within the clamping body, and the clamping body is fixed to the support stand in a freely rotatable state, and the tip of the support part is spherical, so that the structure Even when fitted with a guide having an arcuate groove on the back of a body-contact flat antenna, the solid angle of the axis passing through the center of the flat plate surface of the antenna and perpendicular to the flat plate surface is continuous within a certain solid angle range. and can be adjusted freely. Furthermore, by making the tip spherical, one component can perform the functions of rotation adjustment and solid angle direction adjustment.

(Example) Examples of the present invention are shown in FIGS. 1 to 5. Here, the shape of the structure-adhered planar antenna is rectangular. On the back side of this antenna, a groove 17 is formed on the circumference of radius R around the center point of the back side of the antenna within the range that can be drawn on the back side of the antenna, that is, as shown in FIG. 1, and the cross-sectional shape is as shown in FIG. A guide 2 is provided. In this embodiment, there are three locations, but depending on the situation, there may be three or more locations. Also, guide 2
The antenna can be made of metal such as aluminum or stainless steel, or a resin molded product, and as shown in FIG. 5, it is composed of two parts 2a and 2b, and is fixed to the back surface of the antenna with screws or the like.

Next, a tapered tip 20 is attached to the center of the support portion 4, which has a spherical tip and has a bottle structure as shown in FIG. 3(A).
Insert the center rod 7, which has a threaded rear end, and lightly screw in the nut 8 to create the state shown in FIG. 3(B). Here, the support portion 4 having the spherical tip 18 is
The distal end portion 18 and the pipe-shaped rear portion may be made of stainless steel or the like, and each may be constructed by welding or the like. Further, the center rod 7 can be constructed by casting, cutting, integral molding of resin, or the like.

Next, the structure shown in FIG. 3(B) is mounted on the frame 3 in the manner shown in FIG.
, 5C. At this time, the holding bodies 5b and 5C can be freely rotated by being attached to the support base 6 via a bearing or the like. Further, the positional relationship of the support parts 4a, 4b, and 4c is such that, for example, when attached to a wall surface, the centers of gravity of the respective spherical tips 18a, 18b, and 18c are in the same plane parallel to the wall surface, and perpendicular to that plane. When positioned so that the straight line and the center line of the center rod of each support part are parallel, the center of gravity of each spherical tip 18a, 18b, 18c is at the same position as the guide 2 provided on the back surface of the antenna. They have a similar relationship.

Attach. In this state, as shown in FIG. 4, from one end of each of the guides 2 having grooves 17 provided on the back surface thereof, the spherical tips 18a, 18b, and 18C of the support portions are connected. Insert the antenna while rotating it with the axis passing through the center of the radius R and perpendicular to the back of the antenna as the rotation axis. Here, this antenna has a beam tilt angle with respect to the Z axis when the Z axis is a straight line that is perpendicular to the wall surface and the antenna surface installed parallel to the wall surface and passes through the center of the radius R provided on the back surface of the antenna. θ is given.

When this is installed on a wall or roof, depending on its orientation, it is necessary to receive radio waves in an oblique direction such as 11° in Figure 6 (a). Rotate the tip 18 of the guide so that it follows the groove 17 of the guide. If the antenna surface is simply rotated while remaining parallel to the wall or roof surface, the angle of elevation will be slightly distorted.

Therefore, after rotation, the difference in elevation angle is corrected by the support parts 4b, 4
Adjustment can be made by sliding c in the clamps 5b and 5c. After determining the position in this way, the supporting portion 4a is first tightened by tightening the bolts provided on the clamping bodies 5a, 5b, and 5C.

4b and 4c are completely fixed. Thereafter, by tightening the nut 8 shown in FIG. 3(b), the tip 20 of the taber
sinks into the spherical tip 18, as a result of which the spherical tip 18 is deformed radially outward with respect to the center of the sphere, and the spherical tip 18 is overwhelmed by the inner wall of the groove 17 of the guide 2. In this case, the diameter of the small diameter portion of the tapered tip 20 is equal to the diameter of the spherical tip 18.
When the nut 8 is properly tightened, the spherical tip 1 easily deforms into the inner wall of the groove 17 of the guide 2.
When the nut 8 is properly loosened, there will be a gap between the inner wall of the groove 17 and the spherical tip 18 in a range that does not hinder the rotation of the antenna. Moreover, as shown in FIG. 5, the support parts 4a, 4b, and 4C have a structure that allows them to move within a range of 5 degrees or more up and down with respect to the horizontal axis when fitted with the guide 2a. do. In this way, the spherical tip 18 is connected to the groove 17 of the guide 2.
When the antenna is pressed against the inner wall of the antenna, the friction will completely fix the antenna.

If the beam tilt angle θ is set to 52.5° and the antenna is mounted on a wall or roof facing at least south or west, the rotation center angle will be approximately 556, and the elevation angle adjustment range will be adjusted to the wall or roof. On the other hand, if we create a structure that can be adjusted by up to 5 degrees, reception will be possible in almost all of Japan with one antenna pattern, and if we use this structure, we can realize a flat antenna that is closely attached to the structure in appearance.

The present invention can be applied even when the antenna shape is other than rectangular.

Furthermore, since the azimuth angle can be adjusted, reception can be performed all over Japan, including remote islands, using an antenna with one beam tilt angle. That is, with only one type of antenna pattern, a structure-adhered planar antenna can be realized. Furthermore, the present invention can be applied to installation devices for flat antennas other than structure-adhered flat antennas.

(Effects of the Invention) Since the present invention has the above configuration, it has the following effects.

l) An antenna installation device having a rotation adjustment mechanism and a direction adjustment mechanism can be realized by using a fitting structure between a support portion having a spherical tip and a guide having a groove, and a spherical tip having a split bottle structure.

2) Stress distribution can be achieved by supporting at multiple points, so each component can be made lighter if the required strength is given to the entire structure. Moreover, as a result, installation and removal work becomes easier.

3) This structure is a single component consisting of a support portion with a spherical tip and a guide having a groove, and can perform the functions of rotational adjustment, elevation angle, and azimuth angle adjustment.

[Brief explanation of the drawing]

FIG. 1 is an oblique view of the back surface of an antenna according to an embodiment of the present invention, FIG. 2 is a detailed view of the part that fits with FIG. 1, and FIG. 3 is a perspective view showing the support part and center rod of the present invention. Fig. 4 is a perspective view showing the configuration of an embodiment of the present invention, Fig. 5 is a sectional view of the fitted state of parts to explain the operation of important parts that are features of the present invention, and Fig. 6 is an explanatory diagram of a conventional embodiment. Explanation of symbols 1...Structure-adhesive flat antenna 2...Guide 3...Base 4...Support part 5...Holder 6...Support stand
7...Center rod 8...Natsuto 9...
・Case 10...Flat antenna 11...Radio wave arrival direction 12...Rotation axis 13...Circular antenna 14...Hexagonal antenna 15...Screw 16...Screw 17...Groove 18...
Spherical tip 19...Cracked bottle structure 20...
Tapered tip 21...Tip hole Figure 2 Figure 2

Claims (1)

[Claims] 1. In the installation part of a structure-adhered flat antenna having a beam tilt mechanism in which the radio wave direction showing the maximum gain is at a certain angle with respect to the vertical axis of the radio wave emission surface, A structure-adhering flat plate, characterized by comprising a direction adjustment mechanism that adjusts the beam direction, and a rotation adjustment mechanism that rotates in the circumferential direction of the axis with a rotation axis in a direction perpendicular to the flat plate surface of the antenna. Antenna installation equipment. 2. The structure-adhering planar antenna installation device according to claim 1, wherein the structure-adhering planar antenna installation device supports the antenna at three or more points. 3. The structure-adhering flat antenna installation device according to claim 1, wherein the functions of the direction adjustment and rotation adjustment are performed by one component.