JPS589362Y2 - Slot array antenna device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a slot array antenna device, and particularly to a slot array antenna device that can obtain good directivity in the vertical direction in addition to the directivity in the horizontal force direction of the slot array antenna main body with a configuration that is not easily affected by wind pressure. It is suitable for application to a rotating antenna device.

First, an embodiment of the present invention will be described in detail with reference to FIGS. The structure in which a slot 3 is attached to one side 2 of the opposing plates has a known slot array antenna main body 4,
A dielectric block 5 is disposed in front of it.

This dielectric block 5 is the slot array antenna main body 4.
For example, a perpendicular rear end surface 6 facing the plate 2 of the slot 3, and an upper surface 7 and a lower surface 8 extending in an inclined manner so that the distance gradually decreases toward the front when viewed in longitudinal section (FIG. 3). It has an extended configuration in the horizontal force direction.

In this case, the block body 5 has extensions 9 and 10 extending rearward from its rear upper and lower edges, respectively, and further extending from these to the internal force, and the end surfaces of the second extensions 9 and 10 are The antenna main body 4 is held by the block body 5 in abutting relationship with the upper surface plate 11 and the lower surface plate 12 of the antenna main body 4, and the two are mechanically integrated.

In addition, a large number of slits 1375 are provided in the block body 5, which extend in the virtual vertical plane at predetermined intervals in the horizontal direction from the rear end side, and each of these slits 13 is used for suppressing orthogonal components. A lattice plate 14 is arranged.

Furthermore, an alignment dielectric material 15 is attached to the rear end surface 6 of the block body 5.

The above is an example of the present invention, but according to such a configuration, electromagnetic waves radiated from the front of the slot array antenna main body 4 are introduced into the dielectric block 5 from the rear end surface 6 and propagate forward. In this case, the block 5 has an upper surface 7 and a lower surface 8 that extend in an inclined manner so that the interval gradually becomes 75 DJ\ as the block 5 approaches the front when viewed in longitudinal section.
The electromagnetic waves introduced into the block 5 gradually leak as they advance forward inside the block 5, and therefore the electromagnetic waves radiated from the slot array antenna main body 4 are radiated outward through the dielectric block 5. be.

In this case, the electromagnetic waves leaking from the upper surface 7 and lower surface 8 of the dielectric block 5 are affected by the inclined upper surface 7 and lower surface 8.
Directivity in the direction of vertical force is imparted by the surface effect caused by this.

Therefore, according to the above-mentioned configuration, it is possible to obtain directivity in the vertical direction in addition to the directivity in the horizontal direction that the slot array antenna body 4 itself has, and therefore to effectively obtain an electromagnetic wave beam with a small cross section. It is something that can be done.

Since the directivity in the direction of vertical force is obtained by the dielectric block 5, the directivity in the vertical direction is obtained by extending the flare from the top and bottom plates of the slot array antenna main body. As seen in slot array antenna devices, it has the characteristic of not being significantly affected by wind pressure.

In addition, since the dielectric block 5 that provides directivity in the direction of vertical force is a so-called block body, its mechanical strength is sufficiently large, and electromagnetic waves can propagate well within the dielectric block 5. Therefore, the original characteristics of the slot array antenna device will not deteriorate unnecessarily.

Furthermore, the directivity in the vertical force direction described above also depends on the dielectric constant of the dielectric block 5, and therefore, when the permittivity of the dielectric block 5 is selected to obtain the expected directivity in the vertical force direction. , the electromagnetic waves radiated from the antenna body 4 are not effectively introduced into the dielectric block 5, but since the matching dielectric material 15 is disposed on the rear end surface 6 of the flock body 5, Therefore, it is possible to effectively avoid such distortion, and thus to easily obtain such a slot array antenna device that is endowed with directivity in the desired direction of vertical force.

Furthermore, if the slot array antenna main body 4 is of a closed-edge slot type, it is undeniable that undesirable orthogonal polarization components will occur. Since the grating plate 14 for suppressing polarized wave components is provided, unnecessary orthogonal polarized wave components can be easily and effectively suppressed. It is a dog that can be easily obtained with a simple structure that is long enough to be arranged.

It has characteristics.

In the above description, the matching dielectric material 15 is arranged on the rear end surface 6 of the dielectric block 5 to effectively introduce electromagnetic waves from the slot array antenna body 4 into the dielectric block 5. However, as shown in Figure 4, the first
In the configuration described above in FIGS. 3 to 3, a notch 21 is provided in the rear end surface 6 of the dielectric block 5, so that the distance between the opposing faces gradually decreases as it approaches the front when viewed in longitudinal section. The structure is the same as that described above in FIGS. 1 to 3, except that the upper and lower surfaces 22 and 23 of the cut are inclined, and the cut surfaces 22 and 23 are inclined. By doing so, the electromagnetic waves from the antenna body 4 can be effectively introduced into the flock 5.

In this example, the above-mentioned extensions 9 and 10 are omitted,
However, it has a conductive support body 24 having a U-shaped cross section that supports the antenna body 4 from behind, and conductive plates 2
5 and 26 are extended to the upper blade position and lower position of the rear end surface 6 of the block 5, so that the antenna main body 4 and the block 5 are mechanically integrated. It is designed to more effectively introduce electromagnetic waves radiated from the main body 4 into the flock 5.

Furthermore, in order to effectively introduce the electromagnetic waves radiated from the antenna body 4 described above into the block 5, FIGS.
As shown in the figure, in the configuration described above in FIGS. 1 to 3, the rear end surface 6 of the block 5 is opposite to the case described in FIG.
The support body 24 is provided with a protruding surface 31 that gradually becomes smaller toward the rear when viewed in longitudinal section, and has plate portions 25 and 26 in the same manner as described above with reference to FIG. It can also be constructed in the same manner as in the case of FIGS. 1 to 3, except that the plate portions 25 and 26 are made to extend oppositely from above and below the protruding surface 31 mentioned above. .

The above description only shows a few embodiments of the present invention, and various modifications and changes may be made based on the embodiments described above.

[Brief explanation of the drawing]

Fig. 1 is a front view showing an example of a slot array antenna device according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a sectional view taken along the line ■-■ in Fig. 1, Figs. Figures 5 and 6
The figures are sectional views showing other embodiments of the present invention. In the figure, U is a slot array antenna device, 4 is a slot array antenna main body, 5 is a dielectric block, 6 is a rear end surface,
7 and 8 are upper and lower surfaces respectively, 15 is a matching dielectric material,
22 and 23 are the upper and lower surfaces of the incision, 24 is the support body, and 25
and 26 indicate conductive plates, respectively.

Claims (1)

[Scope of utility model registration request] At the front position of the slot array antenna main body having directivity in the horizontal force direction, there is a rear end surface that receives electromagnetic waves from the slot array antenna main body and introduces the electromagnetic waves into the interior, and a rear end surface that gradually increases the distance toward the front when viewed in longitudinal section. A horizontally extending dielectric block having an upper surface and a lower surface that leak electromagnetic waves introduced inside the dielectric block is arranged such that the dielectric block extends in a horizontal direction, and the dielectric block has an upper surface and a lower surface that leak the electromagnetic waves introduced into the interior of the dielectric block. A plurality of orthogonal component suppression grating plates that can be extended in a vertical plane are sequentially buried and arranged at predetermined intervals in the horizontal direction, thereby suppressing electromagnetic waves having horizontal directivity obtained from the slot array antenna body. The dielectric block imparts directivity in the direction of vertical force to this, and the orthogonal component suppression grating plate suppresses orthogonal polarization components generated in the electromagnetic waves,
A slot array antenna device that emits radiation to the outside.