JPH07212125A - Horizontally and vertically polarized wave sharing antenna - Google Patents

Abstract

PURPOSE:To obtain an antenna shared with horizontally and vertically polarized waves by using a dielectric plate on the surface of which feed slots crossing at right angles to each other are provided and on the back plane of which feed lines intersecting orthogonally to the feed slots are provided. CONSTITUTION:Feed from the feed line 11 to a patch antenna element 4 via a slot 5 is performed, and the antenna element 4 is excited by permitting a current to flow in an X axial direction. Moreover, a patch antenna 2 is excited similarly by permitting the current to flow in the X axial direction via the antenna element 4. In this way. the horizontally polarized wave provided with an electrical field in the X axial direction can be generated from the antenna element 2. Also, the antenna element 4 is excited by permitting the current to flow in a Y axial direction by feeding the antenna element 4 from the feed line 12 via a slot 7. Moreover, the vertically polarized wave provided with the electrical field in the Y axial direction and that becomes cross polarization for the horizontally polarized wave is generated from the antenna element 2 by exciting the antenna element 2 similarly by permitting the current to flow in the Y axial direction via the antenna element 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite receiving antenna, and more particularly to a horizontal / vertical polarization dual-use antenna capable of receiving horizontal polarization and vertical polarization in common.

[0002]

2. Description of the Related Art As a conventional feed horn capable of receiving both horizontally polarized waves and vertically polarized waves, a probe 2 provided on a terminating surface 22 of a circular waveguide 20 as shown in FIG.
1 is rotated by the driving unit 24 so that the direction of the probe 21 becomes parallel to the direction of the electric field of the polarized wave desired to be received among the horizontal polarized wave and the vertical polarized wave, and the linear polarized wave to be received is probed. The received signal was taken out through the rectangular waveguide 23 by being coupled to 21. Alternatively, a patch antenna element may be used to feed power to the same patch antenna element in directions orthogonal to each other, to extract horizontal polarization from one power supply path and to extract vertical polarization from the other power supply path. Was used.

[0003]

However, the conventional antenna for dual horizontal and vertical polarization using the feed horn is as follows.
There is a problem in that it is difficult to reduce the size because the drive unit 24 for rotating the probe 21 is required and the rectangular waveguide 23 is used for signal output. In addition, the conventional horizontal and vertical polarization dual-use antenna using the patch antenna element has a problem that a signal from the satellite cannot be received well because the bandwidth is narrow. The present invention has been made in view of the above problems, and when the band width of the patch antenna element is widened, the horizontally polarized wave and the vertically polarized wave can be commonly received, and the patch antenna element is incorporated in a feed horn. It is an object of the present invention to provide a horizontal and vertical polarization dual-use antenna which can be downsized the feed horn and can also be configured as a planar antenna.

[0004]

The antenna for horizontal and vertical polarizations according to the first invention of the present application has a ground conductor surface provided with two feed slots intersecting at right angles to each other on the front surface, and the feed slot on the back surface. A first dielectric plate having two strip-shaped feed lines provided in a direction orthogonal to the first dielectric plate, and a first dielectric plate laminated on the front surface side of the first dielectric plate and having a first patch antenna element on the surface. A second dielectric plate and a third dielectric plate which is superposed on the surface side of the second dielectric plate and has a second patch antenna element on the surface, and the center of the intersection of the feeding slots. It is characterized in that the points and the center points of the first patch antenna element and the second patch antenna element are arranged on substantially the same central axis.

In the horizontal and vertical polarization dual antenna according to the second aspect of the present invention, the other end of the circular waveguide is provided with respect to the circular waveguide having an opening at one end for introducing a radio wave. Second
The surface where the patch antenna element is provided is placed inside, and the third dielectric plate, the second dielectric plate, and the first dielectric plate are closed to form the first and second patch antennas. The element is characterized in that the element is arranged inside the circular waveguide so that the outer diameter of the element is set to be inside the circular waveguide. In the horizontal and vertical polarization dual antenna of the third invention of the present application, the first dielectric plate provided with a plurality of the two feeding slots and the two feeding lines as a set, and the first
Of the second dielectric plate having a plurality of patch antenna elements, and the third dielectric plate having a plurality of the second patch antenna elements, the two feeding slots and the two feeding plates. The first patch antenna element and the second patch antenna element are arranged in an overlapping manner on each of a pair of feed lines, and the same polarized signal is taken out from one of the feed lines. Cross polarized waves to the polarized signal are obtained by combining them so as to have the same phase, receiving one polarized signal from the other of the feed lines, and combining them so as to have the same phase. Is received.

[0006]

It is known that in order to widen the band of the patch antenna element, the thickness of the dielectric plate provided with the patch antenna element is increased. However, if the thickness of the dielectric plate is increased, it becomes impossible to excite the patch antenna element from the feeding line provided on the back surface. In the horizontal and vertical polarization dual-use antenna of the first invention of the present application, as described above, the dielectric plates provided with the patch antenna elements are stacked in two layers to increase the thickness of the composite dielectric plate, The first patch antenna element is excited from the feed line, and the second patch antenna element provided on the front surface side can be excited through the first patch antenna element, so that the band characteristic is broadened. Is possible. Further, for the patch antenna element, two feed slots intersecting each other at right angles are arranged under the patch antenna element, and two feed lines are arranged in the direction orthogonal to each of the feed slots. Therefore, it is possible to take out the horizontal polarized wave from one of the feed lines and take out the vertical polarized wave from the other feed line, and therefore, the horizontal polarized wave and the vertical polarized wave can be shared and received.

In the horizontal / vertical polarization dual-use antenna of the second aspect of the present invention, the circular waveguide is terminated by using the horizontal / vertical polarization dual-use antenna of the first aspect of the invention. It is possible to downsize the horn. In the horizontal and vertical polarization dual-use antenna of the third invention of the present application, a plurality of horizontal and vertical polarization dual-use antennas of the first invention are arranged to form a planar antenna, and a conventional patch antenna element is used. It becomes possible to make the bandwidth of the antenna wider than that of the above configuration.

[0008]

1 is an exploded perspective view showing the structure of an embodiment of a horizontal / vertical polarization antenna of the present invention.
2 is an enlarged plan view of the horizontal and vertical polarization dual antenna of FIG. 1, and an embodiment will be described below with reference to FIGS. 1 and 2. The surface of the dielectric plate 5 is the ground conductor surface 8, two feeding slots 6 and 7 of substantially rectangular shape intersecting each other at right angles are provided in the center, and a belt-like feeding is provided on the back surface in a direction orthogonal to the feeding slot 6. The line 11 is provided, and the strip-shaped feed line 12 is provided in the direction orthogonal to the feed slot 7,
One ends of the power supply lines 11 and 12 are extended to serve as signal output ends, and the other ends are electrically connected to the ground conductor surface 8 through the openings 9 and 10, respectively. The dielectric plate 3 having the circular patch antenna element 4 is superposed on the surface of the dielectric plate 5 so that the surface on which the patch antenna element 4 is provided faces the front side, and further the circular patch antenna element on the surface. The dielectric plate 1 provided with 2 is overlaid on the surface of the dielectric plate 3 so that the surface on which the patch antenna element 2 is provided is the front surface side,
The center points of the intersecting intersections of the power feeding slots 6 and 7 and the center points of the patch antenna element 4 and the patch antenna element 2 are arranged on substantially the same central axis.

When the patch antenna element 4 is fed from the feeding line 11 through the slot 6, the patch antenna element 4
A current in the X-axis direction can be supplied to the patch antenna element 2 for excitation, and a current in the X-axis direction can be similarly supplied to the patch antenna element 2 via the patch antenna element 4 for excitation. For example, horizontal polarized waves having an electric field in the X-axis direction can be generated. Also,
When the patch antenna element 4 is fed from the power feeding line 12 through the slot 7, a current in the Y-axis direction can be applied to the patch antenna element 4 for excitation, and the patch antenna element 2 can be further excited through the patch antenna element 4. Similarly, since a current in the Y-axis direction can be applied for excitation, it is possible to generate a vertically polarized wave that has an electric field in the Y-axis direction and that is a cross polarized wave with respect to the horizontal polarized wave. it can. Therefore, the thickness of the dielectric plate is a combined thickness of the dielectric plates 1 and 3, and the patch antenna element 1 provided on the surface of the dielectric plate 1 can be excited by making it thicker than in the conventional example, so that the antenna can be excited. The bandwidth of can be widened. If the same antenna is used on the receiving side, the power supply line 11
Can receive and output a horizontally polarized wave, and can receive and output a vertically polarized wave from the feed line 12, and can be used as an antenna for both horizontal and vertical polarized waves.

FIG. 3 is a partially cutaway perspective view showing an embodiment in which the horizontal and vertical polarization antenna of the present invention is used for a feed horn. In the figure, the same parts as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. As the circular waveguide 14, one having a shape capable of propagating an electromagnetic wave of TE11 mode is used, a horn-shaped opening 15 is provided at one end so that the electromagnetic wave can be efficiently introduced, and the other end is made of a dielectric plate 5. It is blocked. The dielectric plate 5 is arranged such that the ground conductor surface 8 is on the side of the circular waveguide 14 and the side on which the feed lines 11 and 12 are provided is on the outside, so that the dielectric plate 5 is located inside the circular waveguide 14. A dielectric plate 3 having the patch antenna element 4 and a dielectric plate 1 having the patch antenna element 2 are sequentially stacked on the conductor surface 8.

The outer diameters of the patch antenna elements 2 and 4 are made smaller than the inner diameter of the circular waveguide 14 so that the patch antenna elements 2 and 4 can fit inside the circular waveguide 14, and The axes, the centers of the patch antenna elements 2 and 4, and the center points (not shown) of the intersections of the feeding slots 6 and 7 are arranged substantially on the same straight line. Other configurations are similar to those of the embodiment of FIG. 1, and receive signals are taken out from the power supply lines 11 and 12 provided on the back surface of the dielectric plate 5, and for example, a switch is provided to switch the receive signals to switch the LN.
Input to the B input circuit, etc., so that the horizontal polarization and the vertical polarization can be received. Therefore, unlike the conventional example, a drive unit for rotating the probe is unnecessary, and the feed horn can be downsized. Further, a circular polarization / linear polarization converter using a dielectric plate or the like is provided on the opening 15 side of the circular waveguide 14, and the linear polarization converted by the converter is converted by the patch antenna elements 2 and 4. By receiving and outputting the received signal from the feeding lines 11 and 12 via the feeding slots 6 and 7, it is possible to receive the right-handed circular polarization and the left-handed circular polarization in common.

FIG. 4 is a layout diagram showing an embodiment in which a plane antenna is constituted by the horizontal and vertical polarized antennas of the present invention. In the figure, the same parts as those shown in FIG. 1 are designated by the same reference numerals and the description thereof will be omitted. Dielectric plates 1, 3 and 5 shown in FIG. 1 having a large area are used, and a plurality of antennas having the configuration shown in FIG. 1 are arranged as one set. Patch antenna element 2 (A to D) on dielectric plate 1
The patch antenna element 4 on the bottom of the dielectric plate 1.
The dielectric plates 3 on which (A to D) are arranged are laminated (not shown), and the grounding conductor surface 8 on the lower surface of the dielectric plate 3 is further provided with feeding slots 6 (A to D) and 7 (A to D). ) Is provided, and the dielectric plate 5 having the power supply lines 11 (A to D) and 12 (A to D) provided on the back surface is laminated.

Feed slot 7 of patch antenna element 2A
The received signal is taken out via the feed line 12A via A, the received signal is taken out via the feed line 12B via the feed slot 7B of the patch antenna element 2B, and combined in the combining section so as to have the same phase. The reception signal is taken out through the feed line 12C through the feed slot 7C of the element 2C, the received signal is taken out through the feed line 12D through the feed slot 7D of the patch antenna element 2D, and combined in the combining section so as to have the same phase, Further, the vertically polarized wave from the combining unit and the vertically polarized wave from the combining unit are combined so as to have the same phase, and the vertically polarized wave is received.

Feed slot 6 of patch antenna element 2A
The received signal is taken out via the feed line 11A via A, the received signal is taken out via the feed line 11B via the feed slot 6B of the patch antenna element 2B, and combined in the combining section so as to have the same phase. The reception signal is taken out through the power feeding line 11C through the power feeding slot 6C of the element 2C, the reception signal is taken out through the power feeding line 11D through the power feeding slot 6D of the patch antenna element 2D, and is combined so as to have the same phase in the combining unit. Furthermore, the reception signal from the combining unit and the reception signal from the combining unit are combined and output in the combining unit so that they have the same phase, and horizontal polarization that is cross polarization with respect to vertical polarization is received. I have to. For example, if a switch is provided and the vertical polarization and the horizontal polarization are switched and input to the input circuit of the LNB or the like, the vertical polarization and the horizontal polarization can be shared and received.

The embodiment of the present invention is not limited to the above example, and for example, the patch antenna elements 2 and 4 may be square patch antenna elements or the like. In the embodiment of FIG. 4, the number of patch antenna elements may be further increased and used.

[0016]

As described above, according to the present invention,
In addition to widening the band characteristics of the antenna, it is possible to receive vertically polarized waves and horizontally polarized waves in common, and if incorporated in the feed horn, unlike the conventional example, the drive section is not required, so the feed horn is downsized. It is possible to provide a horizontal and vertical polarization dual-use antenna that can be configured as a planar antenna using a plurality of antennas.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing the configuration of an embodiment of a horizontal and vertical polarization dual-use antenna of the present invention.

2 is an enlarged plan view of the horizontal and vertical polarization dual antenna of FIG. 1. FIG.

FIG. 3 is a partially cutaway perspective view showing an embodiment in which the horizontal and vertical polarization dual antenna of the present invention is used in a feed horn.

FIG. 4 is a layout view showing an embodiment of a case where a plane antenna is constituted by the horizontal and vertical polarization dual-use antennas of the present invention.

FIG. 5 is a partially cutaway perspective view of a conventional horizontal and vertical polarization dual feed horn.

[Explanation of symbols]

 1 Dielectric Plate 2 Patch Antenna Element 3 Dielectric Plate 4 Patch Antenna Element 5 Dielectric Plate 6 Slot 7 Slot 8 Ground Conductor Surface 9 Connection Point 10 Connection Point 11 Feed Line 12 Feed Line 14 Circular Waveguide 15 Opening 20 Circular Waveguide 21 Probe 22 End face 23 Rectangular waveguide 24 Drive part

Claims (3)

[Claims] 1. A first conductor comprising a ground conductor surface provided with two feed slots intersecting each other at a right angle on the front surface, and two strip-shaped feed lines provided on the back surface in a direction orthogonal to the feed slots. A second dielectric plate, which is superposed on the surface side of the first dielectric plate and has a first patch antenna element on the surface.
And the second dielectric plate on the front side of the second dielectric plate,
A third dielectric plate having a second patch antenna element on its surface, the center point of the intersection of the feeding slots, and the center points of the first patch antenna element and the second patch antenna element. An antenna for both horizontal and vertical polarization, characterized in that the antennas are arranged so as to be located on substantially the same central axis. 2. A circular waveguide having an opening at one end for introducing a radio wave, and the other end of the circular waveguide having the surface provided with the second patch antenna element inside. The third dielectric plate, the second dielectric plate, and the first dielectric plate to close the outer diameters of the first and second patch antenna elements to the circular waveguide. 2. The horizontal and vertical polarization dual-use antenna according to claim 1, wherein the antenna is sized so as to fit inside and is disposed inside the circular waveguide. 3. The first dielectric plate having a plurality of the two feeding slots and the two feeding lines provided therein, and the second dielectric plate having a plurality of the first patch antenna elements provided therein. A dielectric plate and a third dielectric plate provided with a plurality of the second patch antenna elements, and each of the two feeding slots and the two feeding lines is paired on each of the above. The first patch antenna element and the second patch antenna element are arranged so as to overlap with each other, and the same polarization signals are respectively taken out from one of the feed lines and combined so as to have the same phase and one polarization is obtained. 2. A signal is received, and the same polarized wave signal is taken out from the other of the feed lines respectively and combined so as to have the same phase to receive a cross polarized wave with respect to the polarized wave signal. Antenna for both horizontal and vertical polarization.