JP2011199499A - Antenna device and array antenna device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an antenna device that emits orthogonal polarization by simple power supply structure.SOLUTION: The antenna device includes: cavities 1-3; a conductor line layer 6; and feeder circuit layers 4, 5. The cavity 1 has a square top opening 1a. The cavities 2, 3 have through holes 2a, 3a. A ground part of the feeder circuit layer 4 is electrically connected to the cavity 2. The feeder circuit layer 4 has a feeder line 7 and a feeder probe 9. A ground part of the feeder circuit layer 5 is electrically connected to the cavity 3. The feeder circuit layer 5 has a feeder line 8 and a feeder probe 10. The feeder probes 9, 10 are formed so as to orthogonally cross each other, and constituted of a pair of elements facing each other at each tip part of feeder lines extended from branching parts 7a, 8a and fed in the opposite phases. The conductor line layer 6 is constituted of a metal conductor line 6a arranged in parallel in the same direction as the direction of polarization to be emitted by the feeder probe 10. Height from the bottom surface to the conductor line layer 6 is set to a value equal to an interval between the feeder probes 9, 10.

Description

  The present invention relates to an antenna device and an array antenna device which are mounted on an aircraft and constitute a square horn antenna used for satellite communication and ground communication, for example.

In general, when an antenna is mounted on an aircraft or the like, the loading space and the loading weight are limited, so that the antenna is required to be small and lightweight.
As an example of a conventional satellite-mounted array antenna, a horn antenna is known (see, for example, Patent Document 1).

Further, there is a case where the antenna is required to share the orthogonal polarization, and in this case, it is important to reduce the coupling between the antennas.
Thus, a technique has been proposed in which two rectangular horn antennas are crossed and arranged one above the other to reduce the coupling between the antennas (see, for example, Patent Document 2).

Japanese Patent Laid-Open No. 2002-76761 US 2007/0085744 A1

However, in the case of the antenna device described in Patent Document 2, since many components having a complicated structure are stacked, there is a problem that a manufacturing cost and a manufacturing process increase.
As a method for reducing the coupling between the two antennas, there is a method in which two feeding probes are prepared for each polarization and the opposite phase feeding is performed.
In this case, it is necessary to configure the feeding probe for each polarization on the same plane, and the feeding circuit physically interferes. In order to avoid this, it is necessary to configure the feeding probes on different layers, but the height of one feeding probe from the bottom surface of the antenna changes, resulting in a problem that the reflection characteristics deteriorate.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to obtain an antenna device that can radiate orthogonally polarized waves with a simple feeding structure.

An antenna device according to the present invention includes a first cavity made of a metal conductor, a second cavity made of a metal conductor disposed on the upper surface of the first cavity via a conductor line layer, and a second cavity. A third cavity made of a metal conductor disposed on the upper surface with the first and second feeder circuit layers interposed therebetween, and an antenna device comprising:
The first cavity has a square bottom surface and a square upper surface opening that is open to the space, and the second cavity has the same shape or similar shape as the upper surface opening at a position facing the upper surface opening. And the third cavity has a second through hole having the same shape as or similar to the upper surface opening at a position facing the upper surface opening.
The first power supply circuit layer includes a first power supply line and a first power supply probe in a portion covered with the second cavity while the ground portion is conducted to the second cavity.
The second feeder circuit layer is disposed on the upper surface of the first feeder circuit layer, the ground portion is electrically connected to the third cavity, and the second feeder line is formed in a portion covered with the third cavity. And a second feeding probe,
Each of the first and second feed lines has a branch portion,
The first and second power supply probes are arranged at positions facing the upper surface opening and are formed so as to be orthogonal to each other, and each end of the first and second power supply lines extending from the branch portion, respectively. Composed of a pair of elements that are opposed to each other and are fed in opposite phases to each other,
The conductor line layer is composed of a plurality of metal conductor lines arranged in parallel in the same direction as the polarization direction radiated by the second feeding probe,
The height from the bottom surface of the first cavity to the conductor line layer is set to a value equal to the distance between the first power supply probe and the second power supply probe.

  According to the present invention, it is possible to obtain an orthogonal polarization dual antenna device and an array antenna device with a simple power supply configuration, and it is possible to reduce manufacturing costs and manufacturing processes.

It is a perspective view which shows the structure of the antenna device which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the internal structure of the antenna apparatus of FIG. It is sectional drawing by the AA line in FIG. It is sectional drawing by the BB line in FIG. It is a Smith chart which shows the effect by Embodiment 1 of this invention. It is a characteristic view which shows the return loss by Embodiment 1 of this invention. It is sectional drawing which shows the stripline by Embodiment 2 of this invention. It is sectional drawing which shows the suspended track | line by Embodiment 3 of this invention. It is a disassembled perspective view which shows the internal structure of the antenna device which concerns on Embodiment 4 of this invention. It is sectional drawing by the YZ plane (corresponding to the AA line in FIG. 1) of the antenna device of FIG. FIG. 10 is a cross-sectional view taken along the Z-X plane (corresponding to line BB in FIG. 1) of the antenna device of FIG. It is a disassembled perspective view which shows the internal structure of the antenna device which concerns on Embodiment 5 of this invention. It is sectional drawing by the YZ plane (corresponding to the AA line in FIG. 1) of the antenna device of FIG. It is sectional drawing by the ZX plane (corresponding to the BB line in FIG. 1) of the antenna device of FIG. It is a perspective view which shows the external appearance of the array antenna apparatus which concerns on Embodiment 6 of this invention. FIG. 16 is a plan perspective view of the array antenna device of FIG. 15 as viewed from above.

Embodiment 1 FIG.
Hereinafter, an antenna device according to Embodiment 1 of the present invention will be described with reference to the drawings.
1 to 4 show an antenna device (rectangular horn antenna device) according to Embodiment 1 of the present invention, FIG. 1 is a perspective view showing the appearance of the entire device, FIG. 2 is an exploded perspective view of FIG. 3 is a cross-sectional view taken along the line AA (YZ plane) in FIG. 1, and FIG. 4 is a cross-sectional view taken along the line BB (Z-X plane) in FIG. In addition, in each figure, the same code | symbol shows the same or equivalent part.

  1 to 4, the antenna device according to the first embodiment of the present invention is interposed between the cavities 1, 2, and 3, which are formed of metal conductors, and between the cavities 2 and 3. The feeder circuit layers 4 and 5, the conductor line layer 6 interposed between the cavity 1 and the cavity 2, the feeder lines 7 and 8 individually disposed in the feeder circuit layers 4 and 5, and the feeder line 7 , 8 are supplied with power supply probes 9 and 10 individually.

The cavity 1 has a square bottom surface and a square top opening 1a, and the cavities 2 and 3 have upper and lower opening surfaces.
The cavities 2 and 3 located on the upper layer side of the cavity 1 have through holes 2 a and 3 a that penetrate the upper and lower surfaces in the same shape (or similar shape) as the upper surface opening 1 a of the cavity 1. Note that the cavities 2 and 3 may have a shape that gradually expands from the cavity 1 in a tapered manner, like a general horn antenna.

The power supply probe 10 located in the upper layer of the power supply probe 9 is arranged in a direction (Y-axis direction) orthogonal to the arrangement direction (X-axis direction) of the power supply probe 9.
The conductor line layer 6 is a plurality of metal conductors arranged in parallel to the polarization direction (Y-axis direction) radiated by the power supply probe 10 (perpendicular to the polarization direction radiated by the power supply probe 9). It is constituted by a line 6a.

The power feeding probes 9 and 10 in the power feeding circuit layers 4 and 5 arranged in an overlapping manner are located on the opening surfaces of the cavities 1 to 3.
In addition, the ground portion of the feeder circuit layer 4 is electrically connected to the lower cavity 2, and the ground portion of the feeder circuit layer 5 is electrically connected to the upper cavity 3.

  The feeding probe 9 is installed so that the height from the bottom surface of the cavity 1 is λg / 4 (λg is a wavelength inside the cavity). Thereby, the radio wave radiated upward from the power supply probe 9 and the radio wave radiated downward and reflected from the bottom surface of the cavity 1 are combined in the same phase, and a good reflection characteristic can be obtained in the power supply structure.

As shown in FIG. 2, each of the power feeding probes 9 and 10 includes a pair of elements, and the pair of elements are excited in opposite phases.
Accordingly, the power supply lines 7 and 8 for supplying power to the power supply probes 9 and 10 (a pair of elements) are formed so as to be supplied with different lengths from the branch portions 7a and 8a as shown in FIG. Has been. That is, the length from the branch portions 7a, 8a of the feed lines 7, 8 to the feed probes 9, 10 (a pair of elements) is the phase difference between the length to one element and the length to the other element. , About 180 degrees is set.

Next, the operation of the antenna device according to the first embodiment shown in FIGS. 1 to 4 will be described with reference to FIGS.
Note that although a transmission antenna device is described here, it can also be applied as a reception antenna device from the principle of reversibility.

First, when electric power input from the feed line 7 is fed to the feed probe 9, radio waves having the main polarization in the X-axis direction are radiated from a pair of elements constituting the feed probe 9.
At this time, since the height from the bottom surface of the cavity 1 to the feeding probe 9 is set to λg / 4, good reflection characteristics can be obtained.

  Further, since the conductor line layer 6 is disposed in a direction (Y-axis direction) perpendicular to the polarization direction (X-axis direction) of the radiated radio wave from the power supply probe 9, the conductor line layer 6 causes the antenna device to The reflection characteristics do not change.

On the other hand, when electric power input from the feed line 8 is fed to the feed probe 10, radio waves having the main polarization in the Y-axis direction are radiated from a pair of elements constituting the feed probe 10.
At this time, the height from the bottom surface of the cavity 1 to the power supply probe 10 is higher than the height λg / 4 from the bottom surface of the cavity 1 to the power supply probe 9 by hg, and thus becomes λg / 4 + hg.

As a result, the height from the bottom surface of the cavity 1 to the power feeding probe 10 deviates from λg / 4, and therefore the reflection characteristics usually deteriorate.
However, as described above, since the conductor line layer 6 is arranged in the Y-axis direction, the radio wave radiated from the power supply probe 10 is reflected by the conductor line layer 6 and raised from the bottom surface of the cavity 1 by a height hg. An operation equivalent to that performed can be obtained.
Therefore, good reflection characteristics can be obtained for the power supply probe 10.

FIG. 5 is a Smith chart showing the reflection characteristics of the feeding probes 9 and 10, and FIG. 6 is a characteristic chart showing the return loss (dB) with respect to the frequency.
5 and 6, for comparison with the characteristic curve (solid line) according to the first embodiment of the present invention, the characteristic curve (one-dot chain line) when the conductor line layer 6 is not provided is shown in comparison.
In FIG. 6, the horizontal axis represents the frequency (/ fc) normalized by the center frequency fc.

  5 and 6, the height h1 from the bottom surface of the cavity 1 to the feeding circuit layer 5 and the entire antenna device (from the bottom surface of the cavity 1 to the top surface of the cavity 3) with respect to the wavelength λc of the center frequency fc. And the height of the cavity 1 (= distance between the power feeding probe 9 and the power feeding probe 10) hg are respectively set as follows.

h1 = 0.23 × λc
h2 = 0.42 × λc
hg = 0.04 × λc

In FIG. 6, when there is no conductor line layer 6 (one-dot chain line), the return loss increases for frequencies of 0.85 fc or higher.
Therefore, as apparent from FIGS. 5 and 6, it can be seen that when the conductor line layer 6 is not provided (one-dot chain line), the reflection characteristic of the power feeding probe 10 is deteriorated.
On the other hand, it can be seen that when the conductor line layer 6 is present (solid line) as in the first embodiment of the present invention (FIGS. 1 to 4), the deterioration of the reflection characteristics is suppressed.

  As described above, the antenna device according to Embodiment 1 (FIGS. 1 to 4) of the present invention includes the cavity 1 (first cavity) made of a metal conductor and the conductor line layer 6 on the upper surface of the cavity 1. A cavity 2 (second cavity) composed of metal conductors arranged in an overlapping manner, and metal conductors arranged on the upper surface of the cavity 2 via feeder circuit layers 4 and 5 (first and second feeder circuit layers). And a cavity 3 (third cavity).

  The cavity 1 has a square bottom surface and a square upper surface opening 1a open to the space, and the cavity 2 has the same shape as or similar to the upper surface opening 1a at a position facing the upper surface opening 1a. The cavity 3 has a through hole 3a (second through hole) having the same shape as or similar to the upper surface opening 1a at a position facing the upper surface opening 1a. Have.

The power feeding circuit layer 4 is electrically connected to the cavity 2 at the ground portion, and has a power feeding line 7 (first power feeding line) and a power feeding probe 9 (first power feeding probe) in a portion covered with the cavity 2.
The feeder circuit layer 5 is disposed on the upper surface of the feeder circuit layer 4 so that the ground portion is electrically connected to the cavity 3, and a feeder line 8 (second feeder line) and a feeder probe are provided in a portion covered by the cavity 3. 10 (second feeding probe).

The feed lines 7 and 8 have branch portions 7a and 8a, respectively.
The power feeding probes 9 and 10 are arranged at positions facing the upper surface opening 1a and are formed so as to be orthogonal to each other, and at the front ends of the power feeding lines 7 and 8 extending from the branch portions 7a and 8a, respectively. It is composed of a pair of elements that are opposed to each other and are fed in opposite phases.

The conductor line layer 6 is composed of a plurality of metal conductor wires 6a arranged in parallel with the polarization direction (Y-axis direction) radiated by the upper-layer-side power feeding probe 10.
The height hg (electric length) from the bottom surface of the cavity 1 to the conductor line layer 6 is set to a value equal to the distance hg (electric length) between the power feeding probe 9 and the power feeding probe 10.
As a result, an antenna device that can radiate orthogonally polarized waves with a simple feeding structure can be obtained.

Embodiment 2. FIG.
In the first embodiment (FIGS. 1 to 4), the cavity 1, the conductor line layer 6, and the cavity 2 are stacked to form a laminated structure. However, the side walls may be integrated.
Further, the specific configuration of the power supply circuit layers 4 and 5 has not been mentioned, but the power supply circuit layer 4A may be configured by a strip line as shown in FIG. 7, for example.

FIG. 7 is a cross-sectional view showing a feeding circuit layer 4A of the antenna device according to Embodiment 2 of the present invention. The same components as those described above (see FIGS. 1 to 4) are denoted by “A "Is attached.
Here, of the power supply circuit layers 4A and 5A having the same configuration, only the power supply circuit layer 4A is representatively shown.

  In FIG. 7, the power supply circuit layer 4 </ b> A is formed of a strip line, and the strip line includes a power supply line 7 </ b> A, a dielectric 12 that covers the top and bottom of the power supply line 7 </ b> A, and a conductor ground 11 that covers the top and bottom surfaces of the dielectric 12. Has been. The feed line 7A is patterned by etching.

  Similarly to FIG. 7, the feeder circuit layer 5A (not shown) is also formed of a strip line, and the feeder line 8A (not shown) is disposed inside a dielectric different from the dielectric 12 of FIG. The upper and lower surfaces of another dielectric are covered with another conductor ground.

  As described above, according to the second embodiment (FIG. 7) of the present invention, since the feeder circuit layers 4A and 5A are each formed of strip lines, the feeder lines 7A and 8A are simply patterned by etching. The configuration can be simplified.

Embodiment 3 FIG.
In the second embodiment (FIG. 7), the feeder circuit layers 4A and 5A are configured by strip lines. However, the feeder circuit layers 4B and 5B may be configured by suspended lines as shown in FIG. 8, for example.

  FIG. 8 is a cross-sectional view showing feeder circuit layers 4B and 5B of the antenna device according to Embodiment 3 of the present invention. The same components as those described above (see FIGS. 1 to 4) are denoted by the same reference numerals as those described above. “B” is attached.

  In FIG. 8, the power feeding circuit layers 4B and 5B are configured by a suspended line, and the suspended line is configured by a dielectric 12B and power feeding lines 7B and 8B disposed on upper and lower surfaces of the dielectric 12B. . Also in this case, the feed lines 7B and 8B are patterned by etching.

  As described above, according to the third embodiment (FIG. 8) of the present invention, since the feeder circuit layers 4B and 5B are configured by the suspended lines, the feeder lines 7B and 8B are formed as in the second embodiment. Can be easily patterned by etching, and the configuration can be simplified.

Embodiment 4 FIG.
In the first embodiment (FIGS. 1 to 4), the conductor line layer 6 is interposed between the cavity 1 and the cavity 2. For example, as shown in FIGS. A single cavity 1 </ b> C may be integrated to replace the conductor line layer 6, and the corrugate 13 may be formed at the bottom of the upper surface opening 1 a.

9 to 11 show an antenna device (rectangular horn antenna device) according to Embodiment 4 of the present invention. In each figure, the same parts as those described above (FIGS. 1 to 4) are the same as those described above. A detailed description is omitted with reference numerals.
9 is an exploded perspective view of the entire apparatus, FIG. 10 is a cross-sectional view of the antenna apparatus of FIG. 9 taken along the YZ plane (corresponding to the line AA in FIG. 1), and FIG. It is sectional drawing by X plane (corresponding to the BB line in Drawing 1).

In FIG. 9, the cavity 1 </ b> C is divided into two parts for convenience of illustration so that the corrugate 13 can be easily seen through.
Further, the side wall portion of the cavity 1C and the formation portion of the corrugate 13 may be individually created and integrated, or may be integrated after being stacked and stacked as shown in FIG.

  9 to 11, the difference from the first embodiment is that the conductor line layer 6 is deleted, and the cavities 1 and 2 in the lowermost part and the central part are integrated into a cavity 1C. In addition, the corrugation 13 made of a metal conductor is formed only at the bottom of the cavity 1C.

  That is, the antenna device according to Embodiment 4 (FIGS. 9 to 11) of the present invention includes a cavity 1C (first cavity) made of a metal conductor, and the upper surface of the cavity 1C via the feeder circuit layers 4 and 5. And a cavity 3 (second cavity) made of metal conductors arranged in an overlapping manner.

The cavity 1C has a square bottom surface, a square upper surface opening 1a that is open to the space, and a corrugated 13 made of a metal conductor formed at the bottom of the upper surface opening 1a.
The cavity 3 has a through-hole 3a having the same shape as or similar to the upper surface opening 1a at a position facing the upper surface opening 1a.

The power feeding circuit layer 4 has a ground portion that is electrically connected to the cavity 1C, and includes a power feeding line 7 and a power feeding probe 9 in a portion covered with the cavity 1C.
The feeder circuit layer 5 is disposed on the upper surface of the feeder circuit layer 4 so that the ground portion is electrically connected to the cavity 3, and the feeder line 8 and the feeder probe 10 are provided in a portion covered with the cavity 3.

The feed lines 7 and 8 have branch portions 7a and 8a, respectively.
The power feeding probes 9 and 10 are arranged at positions facing the upper surface opening 1a and are formed so as to be orthogonal to each other, and at the front ends of the power feeding lines 7 and 8 extending from the branch portions 7a and 8a, respectively. It is composed of a pair of elements that are opposed to each other and are fed in opposite phases.

The corrugate 13 is composed of a plurality of metal conductors arranged in parallel in the same direction as the polarization direction (Y-axis direction) emitted by the upper-layer-side power feeding probe 10.
Further, the height hg (electric length) from the bottom surface of the cavity 1C to the tip of the corrugate 13 is set to a value equal to the distance hg (electric length) between the power feeding probe 9 and the power feeding probe 10.

In this way, the metal conductor pieces of the corrugate 13 are arranged in parallel with the polarization direction (Y-axis direction) of the radiated radio wave of the feeding probe 10 and set to the same height hg as the feeding probe interval hg. Therefore, the corrugate 13 operates substantially in the same manner as the conductor line layer 6, so that the same effect as that of the first embodiment can be obtained.
In addition, according to the fourth embodiment of the present invention, the conductor line layer 6 and the cavity 2 are not required, so that the number of parts can be reduced.

Embodiment 5 FIG.
In the fourth embodiment (FIGS. 9 to 11), the corrugate 13 is formed at the bottom of the upper surface opening 1a of the cavity 1C. However, for example, as shown in FIGS. The protruding bottom portion 14a of the plate 14 may be inserted into the upper surface opening 1a of the cavity 1D.

12 to 14 show an antenna device (rectangular horn antenna device) according to Embodiment 5 of the present invention, FIG. 12 is an exploded perspective view of the entire device, and FIG. 13 is YZ of the antenna device of FIG. 14 is a cross-sectional view taken along a plane (corresponding to the line AA in FIG. 1), and FIG. 14 is a cross-sectional view taken along the Z-X plane (corresponding to the line BB in FIG. 1) of the antenna apparatus of FIG.
In addition, in each figure, the same thing as the above-mentioned (FIGS. 1-4) attaches | subjects the same code | symbol as above-mentioned, and abbreviate | omits detailed description.

  12 to 14, the difference from the first embodiment is that the cavities 1 and 2 in the lowermost part and the central part are integrated into a cavity 1D, and the conductor line layer 6 is replaced. Thus, the conductive plate 14 having the protruding bottom 14a is provided, and the protruding bottom 14a is only inserted into the upper surface opening 1a of the cavity 1D.

  That is, in the antenna device according to Embodiment 5 (FIGS. 12 to 14) of the present invention, the cavity 1D (first cavity) and the upper surface of the cavity 1D are provided with the conductor plate 14 and the feeder circuit layers 4 and 5 interposed therebetween. And a cavity 3 (second cavity) arranged in an overlapping manner.

  The cavity 1D has a square bottom surface and a square upper surface opening 1a open to the space, and the cavity 3 has the same shape as or similar to the upper surface opening 1a at a position facing the upper surface opening 1a. It has a through hole 3a.

The power feeding circuit layer 4 has a ground portion that is electrically connected to the cavity 1D, and includes a power feeding line 7 and a power feeding probe 9 in a portion covered with the cavity 1D.
The power feeding circuit layer 5 on the upper layer side has a ground portion that is electrically connected to the cavity 3 and has a power feeding line 8 and a power feeding probe 10 in a portion covered with the cavity 3.

The feed lines 7 and 8 have branch portions 7a and 8a, respectively.
The power feeding probes 9 and 10 are arranged at positions facing the upper surface opening 1a and are formed so as to be orthogonal to each other, and at the front ends of the power feeding lines 7 and 8 extending from the branch portions 7a and 8a, respectively. It is composed of a pair of elements that are opposed to each other and are fed in opposite phases.

  The conductor plate 14 has a protruding bottom portion 14a inserted into the upper surface opening 1a, and the protruding bottom portion 14a is a plurality of parallel arrangements in the same direction as the polarization direction (Y-axis direction) radiated by the power feeding probe 10. It is composed of a metal conductor wire.

The conductor plate 14 is electrically connected to the integrated cavity 1 </ b> D and is also electrically connected to the ground portion of the upper feed line 7.
The height hg from the bottom surface of the cavity 1D to the protruding bottom portion 14a is set to a value equal to the distance hg between the power supply probe 9 and the power supply probe 10.

  In this way, the two cavities of the lowermost part and the central part are integrated to form a single cavity 1D, and instead of the conductor line layer 6 described above, a projecting bottom part composed of a parallel conductor line structure in the Y-axis direction By inserting 14a into the upper surface opening 1a and connecting the conductor plate 14 to the ground portion of the feeder circuit layer 4 and the cavity 1D, the same effects as described above can be obtained.

  Further, according to the fifth embodiment of the present invention, since the conductor plate 14 is arranged on the integrated cavity 1D, the conductor line layer 6 and the cavity 2 are not required as in the fourth embodiment. The configuration can be simplified by reducing the number of parts.

Embodiment 6 FIG.
In the first to fifth embodiments (FIGS. 1 to 14), a single antenna device has been described. However, an array antenna device is configured as shown in FIGS. 15 and 16 by arranging a plurality of arbitrary antenna devices. May be.

15 is a perspective view showing an array antenna apparatus according to Embodiment 6 of the present invention, and FIG. 16 is a plan perspective view of the array antenna apparatus of FIG. 15. Typically, the above-described Embodiment 1 (FIGS. FIG. 4) shows a case where a plurality of antenna devices are arranged. The same elements as those described above are denoted by the same reference numerals as those described above, and detailed description thereof is omitted.
Although an example in which 2 × 4 (= 8) antenna devices are arranged in a plane is shown here, the number of antenna devices can be arbitrarily set.

  15 and 16, the antenna devices described above (FIGS. 1 to 14) are arranged in a matrix in a plane and connected via transmission lines 15 and 16 to form an array antenna device. Yes.

As shown in FIGS. 15 and 16, the feeder circuit layers 4 and 5 that are patterned are arranged on the upper layer side of the cavity 2, and the cavity 3 is arranged on the upper layer side of the feeder circuit layers 4 and 5. An array antenna apparatus can be configured.
Moreover, a high directivity gain can be obtained by arraying as shown in FIGS.
Furthermore, it is possible to form a beam having an arbitrary shape by controlling the phase of feeding power to each antenna device.

1, 1C, 1D cavity (first cavity), 1a upper surface opening, 2 cavity (second cavity), 2a through hole (first through hole), 3 cavity (second cavity, third cavity) ) 3a through hole (second through hole) 4, 4A, 4B feed circuit layer (first feed circuit layer) 5, 5A feed circuit layer (second feed circuit layer), 6a metal conductor wire, 6 Conductor line layer, 7, 7A, 7B Feed line (first feed line), 7a Branch, 8, 8A Feed line (second feed line), 9 Feed probe (first feed probe), 10 Feed Probe (second feeding probe), 11 Conductor ground, 12, 12B Dielectric, 13 Corrugated, 14 Conductor plate, 14a Projecting bottom, 15, 16 Transmission line, hg Distance between feeding probes.

Claims (6)

A first cavity made of a metal conductor;
A second cavity composed of a metal conductor disposed on a top surface of the first cavity via a conductor line layer;
A third cavity composed of a metal conductor disposed on the upper surface of the second cavity via first and second feeder circuit layers;
An antenna device comprising:
The first cavity has a square bottom surface and a square top opening opened to a space;
The second cavity has a first through hole having the same shape as or similar to the upper surface opening at a position facing the upper surface opening.
The third cavity has a second through hole having the same shape as or similar to the upper surface opening at a position facing the upper surface opening.
The first power supply circuit layer includes a first power supply line and a first power supply probe in a portion covered with the second cavity while a ground portion is electrically connected to the second cavity.
The second feeder circuit layer is disposed on the upper surface of the first feeder circuit layer, and a ground portion is electrically connected to the third cavity, and a portion covered with the third cavity is provided in the second portion. Two feed lines and a second feed probe;
Each of the first and second feed lines has a branch part,
The first and second power feeding probes are disposed at positions facing the upper surface opening and are formed so as to be orthogonal to each other, and extend from the branch portion, respectively. Consists of a pair of elements that are opposed to each other at each end of the line and are fed in opposite phases,
The conductor line layer is composed of a plurality of metal conductor lines arranged in parallel in the same direction as the polarization direction radiated by the second feeding probe,
The antenna device according to claim 1, wherein a height from a bottom surface of the first cavity to the conductor line layer is set to a value equal to an interval between the first feeding probe and the second feeding probe.   The first and second power supply circuit layers are constituted by strip lines in which the first and second power supply lines are arranged inside individual dielectrics and the upper and lower surfaces of the dielectric are covered with a conductor ground. The antenna device according to claim 1, wherein the antenna device is provided.   2. The antenna device according to claim 1, wherein the first and second feed circuit layers are configured by suspended lines in which the first and second feed lines are arranged on upper and lower surfaces of a dielectric. . A first cavity made of a metal conductor;
A second cavity composed of a metal conductor disposed on the upper surface of the first cavity via first and second feeder circuit layers;
An antenna device comprising:
The first cavity has a square bottom surface, a square top opening opened to a space, and a corrugated metal conductor formed at the bottom in the top opening,
The second cavity has a through-hole having the same shape as or similar to the upper surface opening at a position facing the upper surface opening.
The first power supply circuit layer includes a first power supply line and a first power supply probe in a portion that is grounded to the first cavity and is covered with the first cavity.
The second feeder circuit layer is disposed on the upper surface of the first feeder circuit layer, and a ground portion is electrically connected to the second cavity, and a portion covered with the second cavity is first Two feed lines and a second feed probe;
Each of the first and second feed lines has a branch part,
The first and second power feeding probes are disposed at positions facing the upper surface opening and are formed so as to be orthogonal to each other, and extend from the branch portion, respectively. Consists of a pair of elements that are opposed to each other at each end of the line and are fed in opposite phases,
The corrugate is composed of a plurality of metal conductors arranged in parallel in the same direction as the polarization direction radiated by the second feeding probe,
The antenna device according to claim 1, wherein a height from a bottom surface of the first cavity to a tip portion of the corrugate is set to a value equal to a distance between the first feeding probe and the second feeding probe. A first cavity made of a metal conductor;
A second cavity made of a metal conductor disposed on the upper surface of the first cavity via a conductor plate and first and second feeder circuit layers;
An antenna device comprising:
The first cavity has a square bottom surface and a square top opening opened to a space;
The second cavity has a through-hole having the same shape as or similar to the upper surface opening at a position facing the upper surface opening.
The first power supply circuit layer includes a first power supply line and a first power supply probe in a portion that is grounded to the first cavity and is covered with the first cavity.
The second feeder circuit layer is disposed on the upper surface of the first feeder circuit layer, and a ground portion is electrically connected to the second cavity, and a portion covered with the second cavity is first Two feed lines and a second feed probe;
Each of the first and second feed lines has a branch part,
The first and second power feeding probes are disposed at positions facing the upper surface opening and are formed so as to be orthogonal to each other, and extend from the branch portion, respectively. Consists of a pair of elements that are opposed to each other at each end of the line and are fed in opposite phases,
The conductor plate has a protruding bottom portion that is connected to the ground portion of the first power feeding circuit layer and the first cavity and is inserted into the upper surface opening,
The protruding bottom portion is composed of a plurality of metal conductor wires arranged in parallel with the polarization direction radiated by the second power supply probe,
The antenna device according to claim 1, wherein a height from a bottom surface of the first cavity to the projecting bottom portion is set to a value equal to a distance between the first feeding probe and the second feeding probe.   An array antenna apparatus comprising a plurality of antenna apparatuses according to any one of claims 1 to 5 arranged.

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