JPH052421U - Antenna device - Google Patents

Abstract

(57) [Abstract] [Objective] By rotating an antenna element of an antenna device to change the radio wave radiation direction, the radio wave radiation direction can be changed without changing the direction of the antenna, and an antenna device having good wind pressure characteristics is obtained. [Structure] An antenna element 5 to which a parasitic element 1, a feeding element 2, a base plate 3, and a urethane foam 4 are respectively adhered and a screwed shaft is attached is mounted in a cover 6 which is a rotary bearing, and from the outside of the cover. Antenna element 5 with handle 7
It is a structure that can be rotated. [Effect] The time and cost required for direction adjustment can be reduced without being restricted by the installation location of the antenna. In addition, wind pressure characteristics can be reduced.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of an antenna device used in a base station for mobile radio and the like.

[0002]

[Prior Art]

 FIG. 4 is an external view of a conventional antenna device. In FIG. 4, 1 is a parasitic element substrate, 2 is a feeder element substrate, 3 is a base plate substrate, 4 is a parasitic element substrate 1, a feeder element substrate 2, and a base substrate 3. Is a urethane foam for maintaining a predetermined space, and 9 is a cover for laminating dielectrics, for example, glass fiber reinforced polyester resin, for covering the above 1 to 4.

The conventional antenna device is configured as described above, and the power feeding element 2 is excited by supplying power to the main board 3, and the parasitic element 1 obtains a desired beam for transmission / reception with a mobile station. It is something to do. Inside the antenna, three substrates are protected by dielectric glass fiber reinforced polyester resin in order to prevent water from entering, which deteriorates its radiation characteristics. Since the antenna is installed on a high tower for transmitting and receiving to / from the mobile station, it is required to have enough strength so as not to be destroyed at a strong wind speed of 80 m / s. Must be bonded together to form a sandwich structure.

[0004]

[Problems to be solved by the device]

 Since the conventional antenna device is configured as described above, one antenna element, that is, one antenna device, emits radio waves only in a predetermined direction, and when it is desired to point in another direction, that direction is used. There was a problem that the whole antenna had to be turned to. In addition, the external shape is a square shape with a large wind-receiving area, which follows the shape of the substrate, and there is a problem that the wind load received by the antenna is large. Furthermore, since the direction of radiation of the radio waves from the antenna is determined to be the front direction, there is a problem in that the installation method of the antenna must be considered depending on the place of use.

The present invention has been made in order to solve the above problems, and by rotating the antenna element, the radiation direction of radio waves can be changed and the wind load received by the antenna can be reduced. The purpose is to get. Also, due to the location of the antenna, even if the radiation direction can be fixed only in one direction, the antenna element inside can be rotated and used. I am trying.

[0006]

[Means for Solving the Problems]

 In the antenna device according to the present invention, an antenna element composed of a parasitic board, a feeding board, a ground plane, and a urethane foam is placed in a cover which is a pipe with a dielectric and a lid on one side. It is rotated by a mechanism.

[0007]

[Action]

 In the antenna device according to the present invention, since the antenna element is independently rotatable, it is easy to adjust the antenna direction during installation and change the radio wave radiation direction after installation.

[0008]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to the drawings. 1 and 2, 1 to 4 are exactly the same as the conventional ones. 5 is an antenna element in which 1 to 4 are bonded and laminated, and a screwed shaft is attached, 6 is a cover that protects the antenna element 5 from wind and rain, 7 is a handle that rotates the antenna element, and 8 is an antenna element It is a nut for fixing the.

In the antenna device configured as described above, the fixing nut 8 is loosened, the direction of the antenna element 5 in the cover 6 is changed by the handle 7 as shown in FIG. 3, and the fixing nut 8 fixes the antenna element 5. It is possible to configure an antenna device that can easily direct the radio wave radiation direction to a desired direction. In FIG. 3, L is the center line.

Example 2. In the first embodiment described above, the handle 7 is directly provided on the rotation axis of the antenna element 5 to rotate the antenna element 5, but in order to rotate the antenna element 5, the handle 7 is rotated around the rotation axis of the antenna element. A handle (manual) or a motor (automatic) may be provided via a gear.

Example 3. Further, in the above embodiment, the shape of the cover is circular in order to reduce the wind load, but even if the cover is elliptical, the same effect can be obtained.

[0012]

[Effect of the device]

 As described above, according to the present invention, since the antenna element of the antenna device is rotated so that the electromagnetic wave radiation direction can be changed, it is easy to change the electromagnetic wave radiation direction during or after the antenna is installed. The time and cost of adjusting the direction can be reduced. Moreover, there is an effect that the installation location of the antenna is not restricted.

[Brief description of drawings]

FIG. 1 is an external view showing an antenna device according to an embodiment of the present invention.

FIG. 2 is a sectional side view showing an antenna device according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an antenna device according to an embodiment of the present invention.

FIG. 4 is an external view showing a conventional antenna device.

[Explanation of symbols]

 1 Parasitic element substrate 2 Feed element substrate 3 Base plate substrate 4 Urethane foam 5 Antenna element 6 Cover 7 Handle 8 Fixing nut 9 Glass fiber reinforced polyester resin

Claims (1)

[Claims for utility model registration] [Claim 1] Three substrates, a parasitic element for transmitting and receiving radio waves, a feeding element, and a ground plane, urethane foam for holding the three substrates at a predetermined interval, and the above antenna An antenna device comprising a dielectric cover for mounting the element, wherein the cover is provided with means for rotating the antenna element.