JP4294599B2 - Radio wave receiving converter and antenna - Google Patents

Description

  The present invention relates to a radio wave receiving converter and an antenna. More specifically, it is used for receiving linearly polarized waves.

  For receiving satellite broadcasting or the like, an antenna 50 as shown in FIG. 13 is known. The antenna 50 includes an antenna body 10, an antenna arm 9 extending from one end thereof, and a leg portion 12. Furthermore, the horn part 2 and the radio wave receiving converter 100 are provided at the tip of the antenna arm 9.

When the radio wave is linearly polarized, the polarization angle of the received radio wave differs depending on the longitude and latitude of the antenna installation area. Therefore, when the antenna 50 is installed, the polarization angle of the radio wave received in that area is set. In addition, it is necessary to adjust and fix the angle of the radio wave receiving converter 100. For the convenience of those who perform this setting work, the antenna installation area is generally divided and represented so that the width of about 3 to 5 degrees of the polarization angle becomes one area. Therefore, in order to quickly perform the antenna setting operation based on the area information, a mechanism for rotating the radio wave receiving converter angle so as to divide the polarization angle in units of 3 to 5 ° is required. The technique disclosed in Japanese Patent Laid-Open No. 11-68602 (Patent Document 1) is also for that purpose, but has a drawback that the structure becomes complicated.
Japanese Patent Laid-Open No. 11-68602

  It is an object of the present invention to provide a radio wave receiving converter and an antenna that can perform setting work by easily rotating the angle of the radio wave receiving converter.

  In order to achieve the above object, a radio wave receiving converter according to the present invention includes a main surface and a cylindrical portion protruding substantially perpendicularly from the main surface. The main surface has a facing region for facing the tip of the antenna arm connected to the cylindrical portion. The opposing region is provided with a locking portion for setting a relative rotation angle with respect to the tip end portion of the antenna arm.

  According to the present invention, the relative rotation angle of the radio wave receiving converter with respect to the tip end portion of the antenna arm can be set using the locking portion, so that the setting operation can be easily performed.

(Embodiment 1)
(Constitution)
With reference to FIGS. 1 to 8, an antenna and a radio wave receiving converter according to the first embodiment of the present invention will be described. FIG. 1 shows an antenna 51 in this embodiment. The antenna 51 includes an antenna body 10, an antenna arm 9 extending from one end thereof, and a leg portion 12. Furthermore, a horn portion 2 and a radio wave receiving converter 1 are provided at the tip of the antenna arm 9. FIG. 2 shows an enlarged view of the vicinity of the radio wave receiving converter 1. FIG. 2 is a side view, and a corresponding top view is shown in FIG. In FIG. 3, the antenna arm 9 is not shown. FIG. 4 shows a cross-sectional view taken along the line IV-IV in FIG. The radio wave receiving converter 1 and the horn part 2 are connected via a cylinder part 4. As shown in FIG. 4, the cylindrical portion 4 has a cylindrical shape, and the inside of the cylindrical portion 4 is a waveguide 3. As shown in FIG. 2, the antenna arm 9 includes an antenna arm tip 21. The antenna arm tip 21 includes a clamp upper part 5a and a clamp lower part 5b. As shown in FIG. 4, the cylinder portion 4 is sandwiched from above and below by a clamp upper portion 5a and a clamp lower portion 5b. The upper clamp portion 5a and the lower clamp portion 5b are fixed to each other by clamp screws 6 provided on the left and right. In FIG. 4, one clamp screw 6 is drawn on each of the left and right, but other numbers may be used.

  Radio wave receiving converter 1 has a main surface 20. As shown in FIG. 2, the cylindrical portion 4 protrudes from the main surface 20 substantially vertically. FIG. 5 shows the radio wave receiving converter 1 as seen from the main surface 20 side. In FIG. 5, the horn part 2 and the antenna arm tip part 21 are not shown. The main surface 20 has a facing region 22 for facing the antenna arm tip 21 connected to the cylindrical portion 4. In FIG. 5, the area indicated by hatching is the counter area 22. The facing region 22 is provided with a locking portion 23 for setting a relative rotation angle of the radio wave receiving converter 1 with respect to the antenna arm tip 21.

  In the present embodiment, preferably, the facing region 22 extends longer than the radius of the outer diameter of the cylindrical portion 4 from the position where the cylindrical portion 4 protrudes toward the side where the antenna arm 9 extends. The radius of the outer diameter of the cylindrical portion 4 is R in FIG. The side on which the antenna arm 9 extends is the lower side in FIGS.

  Moreover, it is preferable that the latching | locking part 23 is provided in the position away from the radius R of the outer diameter of the cylinder part 4 from the center of the cylinder part 4. FIG. In the example of FIG. 5, the locking portion 23 is disposed at a position away from the center of the cylindrical portion 4 by D, and D> R, which satisfies this condition.

  FIG. 6 shows an enlarged view of the vicinity of the locking portion 23 in FIG. The locking portion 23 is precisely a recess provided in the main surface 20. On the other hand, the convex part 24 provided in the clamp lower part 5b is fitted. In FIG. 2 and FIG. 6, the main surface 20 and the surface of the clamp lower part 5b are slightly opposed to each other for the convenience of explanation, but they may be in close contact with each other.

  FIG. 7 shows a perspective view of the relative positional relationship of the portion where the locking portion 23 and the convex portion 24 are engaged with each other from the side perpendicular to the main surface 20. The locking part 23 consists of a plurality of grooves. Each of these grooves is a line-shaped groove, and is arranged radially while changing the angle in steps of a constant angle. In this example, the grooves are arranged in increments of 4 °. The convex portion 24 is fitted into any one of the plurality of grooves.

  FIG. 8 shows a cross-sectional view taken along the line VIII-VIII in FIG. The locking portion 23 preferably includes a convex portion or a concave portion having a substantially triangular prism shape in cross section. In this example, as shown in FIG. 8, the locking portion 23 includes a recess having a substantially triangular prism shape in cross section. In the present embodiment, the description has been made on the assumption that the locking portion 23 is a concave portion and is located on the clamp lower portion 5b side, but the combination of the convex portion and the concave portion may be reversed. That is, the main surface 20 may be provided with a convex portion as a locking portion, and the concave portion may be provided on the clamp lower portion 5b side.

(Action / Effect)
Since the radio wave receiving converter 1 according to the present embodiment has the above-described configuration, by selecting which of the plurality of grooves of the locking portion 23 is to be fitted with the convex portion 24 in FIG. Rotate as shown to adjust posture. In FIG. 9, the angle is exaggerated for convenience of explanation, but in reality, the posture can be adjusted for each step of the inclination angle of each groove of the locking portion 23. That is, for example, the posture can be adjusted to match a desired polarization angle in increments of 4 °. Of course, it is possible to adjust an arbitrary angle as a unit by appropriately changing the step widths of the plurality of grooves of the locking portion. This unit angle may be 3 to 5 °. Therefore, the setting operation can be performed by easily rotating the angle of the radio wave receiving converter. Since the distance from the center of rotation to the fitting portion can be increased, the structure of the fitting portion can be made large. As a result, the convex portion 24 is fitted in the groove of the locking portion 23 for the operator. It becomes easy to confirm. Moreover, since the size of the convex portion 24 can be increased to some extent, the mechanical strength of the convex portion 24 itself can be sufficiently provided.

  By making the convex portion or concave portion for positioning into a substantially triangular prism shape, the shear stress generated when the convex portion is moved from groove to groove can be reduced, and the movement from groove to groove can be performed smoothly. Can do. By making a convex part into a substantially triangular prism shape, intensity | strength can also be given to a convex part.

  The locking portion 23 is preferably formed of an elastic body whether it is a convex portion or a concave portion. That is, it is preferable that the latching | locking part provided in a main surface contains the convex part or recessed part formed with the elastic body. This is because the operation of moving the convex portion from groove to groove can be performed more smoothly.

  It is not limited to the locking portion 23 that is formed of an elastic body. For example, at least the facing region 22 of the front surface of the radio wave receiving converter 1 shown in FIG. 5 is formed of an elastic body, the locking portion 23 is a convex portion, and the convex portion is formed by the elastic body constituting the facing region 22. It may be elastically movable in a direction substantially perpendicular to the main surface. If it becomes like this, since a convex part will recede as needed when changing a posture, radio wave receiving converter 1 can be rotated with less force. Moreover, damage can be prevented.

(Modification)
Instead of the structures shown in FIGS. 7 and 8, structures as shown in FIGS. In this example, as shown in FIG. 10, a convex portion 24h is provided on the main surface 20 of the radio wave receiving converter 1 as a new locking portion instead of the locking portion 23 formed of a plurality of grooves. FIG. 11 shows a state in which the convex portion 24h meshes with a locking portion 23h that is a set of a plurality of grooves provided in the clamp lower portion 5b. FIG. 12 shows a cross-sectional view taken along the line XII-XII in FIG. In this example, the main surface 20 of the radio wave receiving converter 1 is formed of a thin plate material and has a hollow structure. As shown in FIG. 10, a linear notch 25 is provided so as to surround the convex portion 24h from three sides into a substantially U-shape. As a result, the convex portion 24h protrudes in a direction perpendicular to the main surface 20 from the peninsular portion, so that the convex portion 24h retreats toward the inside of the radio wave receiving converter 1 with elasticity. Can do. Further, the peninsular portion is elastically twisted when a side pushing force is applied to the convex portion 24h. With such a configuration, the radio wave receiving converter 1 can be rotated with less force. Moreover, damage can be prevented.

  In this modification, the locking portion on the clamp lower portion 5b side is a locking portion 23h that is a set of a plurality of grooves, and the locking portion on the main surface 20 side of the radio wave receiving converter 1 is a convex portion 24h. However, the combination of the convex part and the concave part may be reversed. That is, the latching | locking part 23h may be provided in the main surface 20, and the convex part 24h may be provided in the clamp lower part 5b side.

(antenna)
The operation of the antenna 51 after the setting work is completed is as follows. The radio wave receiving converter 1 included in the antenna 51 has one of the above-described configurations. As shown in FIG. 1, the radio wave 11 reflected by the antenna body 10 is collected by the horn unit 2 and transmitted to the radio wave receiving converter 1 through the waveguide 3. A high-frequency circuit (not shown) is formed inside the radio wave receiving converter 1, and the transmitted radio wave is amplified by this high-frequency circuit, frequency-converted, and output from the output terminal 8. (Not shown). Since the antenna 51 in the present embodiment includes the radio wave receiving converter 1 having the above-described configuration, the antenna 51 can easily perform setting work corresponding to the polarization angle corresponding to the installation location. .

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It is not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and includes all modifications within the scope and meaning equivalent to the terms of the claims.

It is a perspective view of the antenna in Embodiment 1 based on this invention. It is an enlarged side view of the vicinity of the radio wave receiving converter of the antenna according to the first embodiment of the present invention. FIG. 3 is a top view corresponding to FIG. 2. It is arrow sectional drawing regarding the IV-IV line | wire in FIG. It is the figure which looked at the converter for radio wave reception in Embodiment 1 based on this invention from the main surface side. FIG. 3 is an enlarged view in the vicinity of a locking portion in FIG. 2. It is a perspective view which shows the relative positional relationship of the part which the latching | locking part and the convex part are meshing. It is arrow sectional drawing regarding the VIII-VIII line in FIG. It is explanatory drawing of the mode of rotation of the converter for radio wave reception in Embodiment 1 based on this invention. It is the 1st partial enlarged view of the modification of the converter for radio wave reception in Embodiment 1 based on this invention. It is the 2nd partial enlarged view of the modification of the converter for radio wave reception in Embodiment 1 based on this invention. It is the 3rd partial enlarged view of the modification of the converter for radio wave reception in Embodiment 1 based on this invention. It is a perspective view of the antenna based on a prior art.

Explanation of symbols

  1,100 radio wave receiving converter, 2 horn part, 3 waveguide, 4 cylindrical part, 5a clamp upper part, 5b clamp lower part, 6 clamp screw, 8 output terminal, 9 antenna arm, 12 leg part, 20 main surface, 21 Antenna arm tip, 22 opposing area, 23 locking part, 24, 24h convex part, 25 linear notch, 26 cable, 50, 51 antenna.

Claims (8)

  A main surface and a cylindrical portion projecting substantially perpendicularly from the main surface, the main surface having an opposing region for facing an antenna arm tip connected to the cylindrical portion; Is a radio wave receiving converter provided with a locking portion for setting a relative rotation angle with respect to the tip end portion of the antenna arm.   2. The radio wave receiving converter according to claim 1, wherein the opposing region extends longer than a radius of an outer diameter of the cylindrical portion from a position where the cylindrical portion protrudes toward a side where the antenna arm extends.   3. The radio wave receiving converter according to claim 1, wherein the locking portion is provided at a position away from a center of the cylindrical portion than a radius of an outer diameter of the cylindrical portion.   The radio wave receiving converter according to any one of claims 1 to 3, wherein the locking portion includes a convex portion or a concave portion having a substantially triangular prism shape in cross section.   The radio wave receiving converter according to any one of claims 1 to 4, wherein the locking portion includes a convex portion or a concave portion formed of an elastic body.   The opposing region is formed of an elastic body, the locking portion is a convex portion, and the convex portion is elastically movable in a direction substantially perpendicular to the main surface by the elastic body. To 5. The radio wave receiving converter according to any one of 1 to 5.   The radio wave receiving converter according to claim 6, wherein the facing region has a linear notch formed so as to surround the convex portion in a substantially U-shape.   An antenna comprising the radio wave receiving converter according to claim 1.

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