JPS5929365Y2 - antenna device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an antenna device used in radar, etc., in which a circular polarizer is rotatably mounted on a phased array antenna, and particularly relates to a mounting structure for the circular polarizer.

When using a circular polarizer in combination with a phased array antenna used in radar, etc., conventionally the circular polarizer was divided into pieces of a size that could be carried by hand and placed in a separate location from the phased array antenna. I store it, and when I use it, I transport the circular polarizer and attach it to the phased array antenna.

That is, as shown in FIGS. 1 and 2, the divided panel-shaped circular polarizer 11 or 21 is carried to the lower part of the phased array antenna 10, and assembled into a foldable structure using hinges, or assembled into a large panel shape. After assembling it, it is attached to the front of the phased array antenna 10.

However, in the above method, the circular polarizer 11 is a heavy object.
, 21 required considerable effort to transport and install, and installation work during strong winds was difficult and dangerous.

Furthermore, it was necessary to secure a storage space for the circular polarizers 11 and 21 when they are not in use.

The present invention was developed to eliminate the above-mentioned drawbacks, and by attaching a rotatable circular polarizer to the front and back of the phased array antenna so that it can be moved arbitrarily to the front and back of the phased array antenna, it To provide an antenna device that can be easily and safely set to a predetermined usage state in a short time even when the antenna is in use, eliminates the work of transporting a circular polarizer, and does not require securing a storage space and has a good space factor. .

An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 3, 31 is a phased array antenna installed substantially vertically, and 32 is a circular polarizer having approximately the same size as the antenna 31 as a whole and divided into left and right halves.

The left section of this circular polarizer 32 is further divided into left and right sections 3.
It is divided into approximately two equal parts of 3° 34, and is connected by a hinge 35 so that it can be folded until the front surfaces of the two come into contact with each other.

In addition, the right section of the circular polarizer 32 is further divided into left and right sections 3.
6.37, and are connected by a screw 38 so that they can be folded until their front surfaces come into contact with each other.

A lever (
Only the upper one 39 is shown.

) are rotatably attached at each end.

In this case, by rotating this lever 39, the circular polarizer 32
In use, the left half of the antenna 31 is open and faces the left half of the front of the antenna 31 (see FIG. 3).

) or an unused state (stored state) in which the left half sections 33 and 34 of the circular polarizer 32 are folded and the back of the section 34 is in contact with the left end portion of the back of the antenna 31,
(see Fig. 4a) and the transition between the above two states (see Fig. 4b + c).

) The length and mounting position of the lever 39 that enables this to be performed are determined.

Similarly, levers (only the upper one 40 is shown) are installed on the upper and lower surfaces of the rightmost section 37 of the circular polarizer 32 and on the upper and lower right end portions of the phased array antenna 31.

) are rotatably attached at each end.

By rotating this lever 40, a transition can be made between the unused state shown in FIG. 4a and the used state shown in FIG. 3 in the order shown in FIGS. As such, the length and mounting position of the lever 40 are determined.

Also, when setting the circular polarizer 32 to use, the antenna 3
1 each section 33, 34 in order to maintain the state of contact with the front surface.
, 36, 37 and the upper and lower end surfaces of the antenna 31 are provided with a fixing device such as a hook 41 which can be freely engaged with and removed from the top and bottom surfaces of the antennas 31 and 37, respectively.

Similarly, when the circular polarizer 32 is set to an unused state, for example, the section 3
A fixing device such as a hook 42 is provided which can connect and detach the upper and lower end surfaces of the antenna 31 and the upper and lower end surfaces of the antenna 31 from each other.

Therefore, according to the above-mentioned antenna device, the circular polarizer 32 is rotatably attached to the phased array antenna 31 so that it can be moved arbitrarily to the front or back of the phased array antenna 31. Therefore, the circular polarizer 32 can be easily and safely set from the non-use state to the use state, or vice versa, not only when commuting to school but also during strong winds.

Moreover, since there is no need to transport the relatively heavy circular polarizer 32, the setting operation for the use state or non-use state can be carried out in a short time.

Furthermore, since the circular polarizer 32 can be stored on the back side of the antenna 31 when not in use, it is possible to secure a storage location for the circular polarizer 32 in a location separate from the antenna 131, which was required in the past. This has the advantage of improving the space factor.

In the above embodiment, the left and right sections of the circular polarizer 32 are each subdivided into a foldable structure, and the circular polarizer 3 is folded when not in use.
2 is positioned at the left and right ends of the back surface of the antenna 31, but this is to avoid the antenna column being normally provided at the center of the back surface of the antenna 31.

Further, when the circular polarizer 32 is moved in the folded state, there is less wind resistance, which has the advantage of making work easier in strong winds.

However, if the antenna support is provided on the lower surface side of the antenna 31, for example, the left and right sections of the circular polarizer 32 may be rotated without being folded.

Further, the structure for rotatably supporting the circular polarizer 32 is not limited to the above-mentioned embodiment; for example, each end of a linear lever may be rotatably held in a horizontal plane on both sides of the antenna 31. The other end of this lever may be attached to the side surface of the circular polarizer 32 so as to be rotatable within a horizontal plane.

As mentioned above, the present invention has a rotatable circular polarizer attached to the phased array antenna so that it can be moved arbitrarily to the front or back of the antenna, making it easy and safe even in strong winds. Furthermore, it is possible to set the antenna device to a predetermined usage state in a short time, to omit the work of transporting the circular polarizer, and to provide an antenna device with a good space factor without the need to secure a storage space.

[Brief explanation of drawings]

Figures 1 and 2 are diagrams shown to explain how to attach a circular polarizer to a conventional phased array antenna, respectively.
FIG. 3 is a perspective view showing an embodiment of the antenna device according to the present invention, and FIGS. 4A to 4C are views for explaining how to use the aerial clamping device of FIG. 3. 31... Phased array antenna, 32...
...Circular polarizer, 33, 34, 36.37...
Each section of the circular polarizer, 39, 40... Lever.

Claims (1)

[Scope of utility model registration request] A phased array antenna held in a vertical position,
A circular polarizer having approximately the same size as the front surface of the antenna and divided into left and right halves; 1. An antenna apparatus comprising: a rotatable holding member which is rotatably held in a horizontal plane and attached to the antenna so as to be freely movable to a position in use.