JP7618174B2 - Antenna Device - Google Patents

Description

The present invention relates to an antenna device.

One type of antenna device used in base stations and the like is an array antenna, which allows easy control of directivity. In addition, in order to support a wide frequency band, this type of antenna device is often configured by combining arrays of several types of antenna elements, each of which supports a different frequency band.

Patent document 1 discloses an array antenna device that has a dielectric plate on one side of which multiple radiating elements are arranged vertically and horizontally, the radiating elements are divided into multiple groups, and the spacing between each group is different from the spacing between each radiating element.

Patent Document 2 discloses a dual-band antenna device in which a low-frequency array antenna and a high-frequency array antenna are arranged, the low-frequency array antenna being made up of four identically shaped elements, each of which is arranged at the vertices of a square so as to form the square, and the high-frequency array antenna being made up of four identically shaped elements, each of which is arranged at the vertices of a square so as to form the square on a planar substrate, with the centers of each square being in the same position, and the high-frequency array antenna being arranged at a 45-degree angle with respect to the low-frequency array antenna.

JP 2003-347842 A JP 2013-157920 A

Antenna devices are required to be smaller in size in order to reduce installation work and reduce the effects of wind and other factors after installation.

The present invention aims to reduce the size of an antenna device that combines multiple array antennas that support different frequency bands while suppressing degradation of frequency characteristics.

The present invention, which achieves the above-mentioned object, is an antenna device characterized in that it is configured by arranging three or more types of antenna elements corresponding to different frequency bands, the first antenna elements are arranged so as to align a square area formed by arranging two sets of antenna elements of two systems, each having a radiating portion in two orthogonal directions, on all four sides, the second antenna elements are arranged across a plurality of square areas including a square area located in the center of the arrangement of square areas formed by the first antenna elements, and the third antenna element is arranged in one or more square areas including a square area located at a corner of the arrangement of square areas formed by the first antenna elements, so as not to overlap with the arrangement of the second antenna elements.
More specifically, the set of second antenna elements is arranged in a direction inclined at 45 degrees to the direction in which the square areas of the first antenna elements are arranged.
More specifically, the second antenna element has two systems of radiating portions that are mutually orthogonal, and these radiating portions are disposed at an angle of 45 degrees to the radiating portions of the first antenna element.
More specifically, the set of arrayed third antenna elements is disposed within a square area in alignment with the square area of the first antenna elements.
More specifically, the third antenna element has two systems of radiating portions that are mutually orthogonal, and these radiating portions are disposed at an angle of 45 degrees to the radiating portions of the first antenna element.
Preferably, the third antenna elements are arranged in two sets at two diagonal positions in the arrangement of the square area formed by the first antenna elements.
More preferably, the antenna may further include a fourth antenna element corresponding to a frequency band different from the first to third antenna elements, and the arrangement of the fourth antenna elements may be configured to be arranged in two sets at two diagonals different from the diagonal in which the arrangement of the third antenna elements is arranged in the arrangement of the square area formed by the first antenna elements.
More specifically, the second antenna element may be an antenna element corresponding to a higher frequency band than the first antenna element, and the third antenna element may be an antenna element corresponding to an even higher frequency band than the second antenna element.
Preferably, the antenna may further include a fourth antenna element corresponding to an even higher frequency band than the third antenna element, and the third antenna element and the fourth antenna element may be arranged in pairs at two different diagonal positions in the arrangement of the square area formed by the first antenna element.

According to the present invention, in an antenna device that combines multiple array antennas corresponding to different frequency bands, it is possible to reduce the size while suppressing the deterioration of frequency characteristics.

1 is a diagram showing a configuration of an antenna device according to an embodiment of the present invention; FIG. 2 is a front view of the antenna device according to the present embodiment. FIG. 2 is a diagram showing a configuration of an LB element. FIG. 2 is a diagram showing the configuration of one element in an MB element. FIG. 2 is a diagram showing the configuration of one element in the HB1 element. FIG. 2 is a diagram showing the configuration of one element in the HB2 element. FIG. 2 is a diagram showing an arrangement of LB elements. FIG. 2 is a diagram showing an arrangement of MB elements. FIG. 1 shows the arrangement of HB1 elements. FIG. 1 shows the arrangement of the HB2 element. 11A and 11B are diagrams showing directivity patterns of an LB element, in which FIG. 11A shows an in-plane directivity of an electric field, and FIG. 11B shows an in-plane directivity of a magnetic field. 12A and 12B are diagrams showing directivity patterns of an MB element, in which FIG. 12A shows directivity in a vertical plane, and FIG. 12B shows directivity in a horizontal plane. 13A and 13B are diagrams showing the directivity pattern of the HB1 element, where FIG. 13A shows the directivity in the vertical plane, and FIG. 13B shows the directivity in the horizontal plane. 14A and 14B are diagrams showing the directivity pattern of the HB2 element, in which FIG. 14A shows the directivity in the vertical plane, and FIG. 14B shows the directivity in the horizontal plane. 11A and 11B are diagrams showing modified examples of the arrangement of antenna elements according to the present embodiment.

The following describes in detail an embodiment of the present invention with reference to the attached drawings.

<Configuration of Antenna Device>
Fig. 1 is a diagram showing the configuration of an antenna device according to this embodiment. The antenna device 100 shown in Fig. 1 is configured by arranging antenna elements 20 on one side of a plate-shaped base 10. A reflector is provided on the side of the base 10 on which the antenna elements 20 are arranged. Hereinafter, the side of the base 10 on which the antenna elements 20 are provided in the antenna device 100 is referred to as the front. Although not shown in the figure, a cover is attached to the antenna device 100 so as to cover the arrangement of the antenna elements 20. As an example, the size of the antenna device 100 is x = 600 mm, y = 600 mm, and z = 125 mm.

Figure 2 is a front view of the antenna device 100. Three or more types of antenna elements 20 corresponding to different frequency bands are arranged on the front of the antenna device 100. In the example shown in Figure 2, four types of antenna elements 20 are arranged: LB (low band) element 21, MB (middle band) element 22, HB1 (first high band) element 23, and HB2 (second high band) element 24. In the figure, the area where the antenna elements 20 for each frequency band are arranged is indicated by a dashed line.

The LB elements 21 are antenna elements 20 that correspond to low-band frequency bands (e.g., 0.7 GHz band and 0.8 GHz band). The LB elements 21 are a combination of the LB elements 21 arranged along the x direction (horizontal direction; horizontal direction in FIG. 2) shown in FIG. 2 and the LB elements 21 arranged along the y direction (vertical direction; vertical direction in FIG. 2), forming a 2 MIMO (Multiple-Input and Multiple-Output).

The MB element 22 is an antenna element 20 that supports a middle band frequency band (for example, 1.5 GHz band, 1.7 GHz band, and 2.0 GHz band). The MB element 22 is configured by combining two elements that are crossed at an angle of 45 degrees with respect to the x-y direction shown in FIG. 2, and one MB element 22 provides 2 MIMO.

The HB1 element 23 is an antenna element 20 that corresponds to one of two high-band frequency bands (e.g., 2.3 GHz band, 2.6 GHz band, and 3.5 GHz band). The HB1 element 23 is composed of two elements that are crossed at a 45 degree angle with respect to the x-y direction shown in FIG. 2, and one HB1 element 23 constitutes 2 MIMO.

The HB2 element 24 is an antenna element 20 that corresponds to the other frequency band of the two high bands (for example, the 3.7 GHz band, the 4.5 GHz band, and the 3.5 GHz band). The HB2 element 24 is composed of two elements that are crossed at a 45 degree angle with respect to the x-y direction shown in FIG. 2, and one HB2 element 24 constitutes 2 MIMO.

<Configuration and arrangement of antenna elements>
Further description will be given of each antenna element 20 and the arrangement of each antenna element 20. As described above, the MB element 22, the HB1 element 23, and the HB2 element 24 are each configured by combining two elements, but the description will be given focusing on one of these elements.

LB element 21
FIG. 3 is a diagram showing the configuration of the LB element 21. The LB element 21 is configured by providing a radiating portion 21b and a power supply portion 21c on a dielectric substrate 21a. The lower side of the dielectric substrate 21a in FIG. 3 is attached to the reflector of the base 10. The radiating portion 21b and the power supply portion 21c are provided on both sides of the dielectric substrate 21a. In the example shown in FIG. 3, on the surface of the dielectric substrate 21a on the near side of the paper (the surface visible in FIG. 3), the power supply portion 21c rises from near the center of the side attached to the base 10, and the radiating portion 21b extends to the right in the figure. On the surface of the dielectric substrate 21a on the far side of the paper (the surface not visible in FIG. 3), as shown by the dashed line, the power supply portion 21c rises from near the center of the side attached to the base 10, and another radiating portion 21b extends in the opposite direction to the radiating portion 21b on the near side surface.

Here, if the frequency band supported by the LB element 21 is fc = 0.839 GHz, then the combined length LBa of the two radiating sections 21b provided on both sides of the dielectric substrate 21a is 170 mm ≒ 0.48 λc. The length LBb of the power supply section 21c is 60 mm ≒ 0.17 λc. The size of the dielectric substrate 21a on which these radiating sections 21b and power supply section 21c are provided is 172 mm in length (horizontal direction of the figure) and 80.5 mm in height (vertical direction of the figure).

Figure 7 is a diagram showing the arrangement of LB elements 21. The LB elements 21 are divided into two systems, one arranged along the x direction and the other along the y direction. In the example shown in Figure 7, four element rows in which three LB elements 21 are arranged along the x direction are arranged in the y direction, and four element rows in which three LB elements 21 are arranged along the y direction are arranged in the x direction. Therefore, in the illustrated configuration, 12 LB elements 21 are arranged along the x direction and 12 LB elements 21 are arranged along the y direction. Then, two LB elements 21 arranged along the x direction and two LB elements 21 arranged along the y direction form a square area surrounded on all four sides, and the LB elements 21 are arranged so that nine 3 x 3 areas are arranged along the x and y directions. The size of the 3 x 3 area of the square area formed by the LB elements 21 is approximately equal to the size of the surface of the base 10 on which the antenna elements 20 are provided.

MB element 22
FIG. 4 is a diagram showing the configuration of one element in the MB element 22. The MB element 22 is configured by combining two elements shown in FIG. 4. The two elements are orthogonal at the center in the horizontal direction in FIG. 4 and combined to form a cross shape as a whole. The element shown in FIG. 4 is configured by providing a radiating portion 22b and a power supply portion 22c on a dielectric substrate 22a. The foot portion of the dielectric substrate 22a that protrudes downward in FIG. 4 is attached to a reflector. The radiating portion 22b and the power supply portion 22c are provided on both sides of the dielectric substrate 22a. In the example shown in FIG. 4, on the surface of the dielectric substrate 22a on the near side of the paper (the surface visible in FIG. 4), the power supply portion 22c rises from the foot portion attached to the base 10, and the radiating portion 22b extends to the right of the figure. Furthermore, on the surface of the dielectric substrate 22a at the rear of the page (the surface not visible in Figure 4), as shown by the dashed line, a power supply section 22c rises from the foot attached to the base 10, and another radiating section 22b extends in the opposite direction to the radiating section 22b on the front surface.

Here, if the frequency band supported by the MB element 22 is fc = 1.799 GHz, then the combined length MBa of the two radiating sections 22b provided on both sides of the dielectric substrate 22a is 78 mm ≒ 0.47 λc. The length MBb of the power supply section 22c is 39.5 mm ≒ 0.24 λc. The size of the dielectric substrate 22a on which these radiating sections 22b and power supply section 22c are provided is 80 mm in length (horizontal direction in the figure) and 46.5 (= 20 + 26.5) mm in height (vertical direction in the figure).

Figure 8 is a diagram showing an arrangement of MB elements 22. As described above, the MB elements 22 are configured by combining two elements, with one MB element 22 forming two systems. In the example shown in Figure 8, nine MB elements 22 are arranged in a 3 x 3 square (diamond) at a 45 degree angle with respect to the x-y direction. Also, in the example shown in Figure 8, these nine MB elements 22 are arranged across multiple square regions formed by the LB elements 21.

To explain the arrangement of the MB elements 22 in more detail, the nine square regions formed on the base 10 by the LB elements 21 are distinguished as follows. Of the square regions shown in Figures 7 and 8, the square region located on the left of the top row is called the "upper-left region". Similarly, the square region located in the center of the top row is called the "upper-middle region". The square region located on the right of the top row is called the "upper-right region". Also, the square region located on the left of the middle row is called the "middle-left region". Similarly, the square region located in the center of the middle row is called the "middle-middle region". The square region located on the right of the middle row is called the "middle-right region". Also, the square region located on the left of the bottom row is called the "lower-left region". Similarly, the square region located in the center of the bottom row is called the "lower-middle region". And the square region located on the right of the bottom row is called the "lower-right region".

If the square regions are distinguished as above, the four MB elements 22 located at the four corners of the diamond-shaped arrangement of 3 x 3 MB elements 22 are arranged in the top-middle region, middle-left region, middle-right region, and bottom-middle region, respectively. The other five MB elements 22 are arranged in the middle-middle region. Each MB element 22 is arranged so that two elements are tilted at 45 degrees with respect to the direction in which the LB elements 21 are arranged (x-y direction).

HB1 element 23
FIG. 5 is a diagram showing the configuration of one element in the HB1 element 23. The HB1 element 23 is configured by combining two elements shown in FIG. 5. The two elements are orthogonal at the center in the horizontal direction in FIG. 5 and combined to form a cross shape as a whole. The element shown in FIG. 5 is configured by providing a radiating portion 23b and a power supply portion 23c on a dielectric substrate 23a. The foot portion of the dielectric substrate 23a that protrudes downward in FIG. 5 is attached to a reflector. The radiating portion 23b and the power supply portion 23c are provided on both sides of the dielectric substrate 23a. In the example shown in FIG. 5, on the surface of the dielectric substrate 23a on the front side of the paper (the surface visible in FIG. 5), the power supply portion 23c rises from the foot portion attached to the base 10, and the radiating portion 23b extends to the right of the figure. Furthermore, on the surface of the dielectric substrate 23a at the rear of the page (the surface not visible in Figure 5), as shown by the dashed line, a power supply section 23c rises from the foot attached to the base 10, and another radiating section 23b extends in the opposite direction to the radiating section 23b on the front surface.

Here, if the frequency band supported by the HB1 element 23 is fc = 2.95 GHz, then the combined length HB1a of the two radiating sections 23b provided on both sides of the dielectric substrate 23a is 61.2 mm ≒ 0.60 λc. The length HB1b of the power supply section 23c is 27.4 mm ≒ 0.27 λc. The size of the dielectric substrate 23a on which these radiating sections 23b and power supply section 23c are provided is 62.2 mm in length (horizontal direction in the figure) and 36 (= 19.5 + 16.5) mm in height (vertical direction in the figure).

Figure 9 is a diagram showing the arrangement of HB1 elements 23. The HB1 elements 23 are configured by combining two elements as described above, with one HB1 element 23 forming two systems. In the example shown in Figure 9, nine HB1 elements 23 are arranged in a 3 x 3 square along the x-y directions. Also, in the example shown in Figure 9, these nine HB1 elements 23 are arranged so as to fit within one square area formed by the LB elements 21 (in the illustrated example, the bottom-left area in the division of the square areas described above).

Here, each HB1 element 23 is arranged so that two elements are inclined at 45 degrees with respect to the direction in which the LB elements 21 are arranged (x-y direction). As described above, the length of the dielectric substrate 23a constituting one element in the LB element 21 is 62.2 mm. Therefore, when three HB1 elements 23 are arranged side by side so that each element is aligned along the x-y direction, the length in the x and y directions is 186.6 mm. This is larger than the length of the LB element 21, 172 mm. In contrast, by inclining each element 45 degrees with respect to the x-y direction, the size of the HB1 element 23 in the x and y directions is about 44 (= 62.2 / √2) mm. Therefore, the length of three HB1 elements 23 arranged in the x and y directions is about 132 mm, which is smaller than the length of the LB element 21, 172 mm. Therefore, the arrangement of the HB1 elements 23 fits within one square area formed by the LB elements 21.

As shown in FIG. 2, the HB1 elements 23 are arranged in two sets at two diagonal locations in the square region formed by the LB elements 21 (the bottom-left region and the top-right region in the example shown in FIG. 2). Therefore, the HB1 elements 23 are arranged in two sets of two systems, making a total of four systems. The HB1 elements 23 are smaller in size than the LB elements 21 and MB elements 22, so there are more systems.

HB2 element 24
FIG. 6 is a diagram showing the configuration of one element in the HB2 element 24. The HB2 element 24 is configured by combining two elements shown in FIG. 6. The two elements are orthogonal at the center in the horizontal direction in FIG. 6 and combined to form a cross shape as a whole. The element shown in FIG. 6 is configured by providing a radiating portion 24b and a power supply portion 24c on a dielectric substrate 24a. The foot portion of the dielectric substrate 24a that protrudes downward in FIG. 6 is attached to a reflector. The radiating portion 24b and the power supply portion 24c are provided on both sides of the dielectric substrate 24a. In the example shown in FIG. 6, on the surface of the dielectric substrate 24a on the front side of the paper (the surface visible in FIG. 6), the power supply portion 24c rises from the foot portion attached to the base 10, and the radiating portion 24b extends to the right of the figure. Furthermore, on the surface of the dielectric substrate 24a at the rear of the page (the surface not visible in Figure 6), as shown by the dashed line, a power supply section 24c rises from the foot attached to the base 10, and another radiating section 24b extends in the opposite direction to the radiating section 24b on the front surface.

Here, if the frequency band supported by the HB2 element 24 is fc = 4.2 GHz, then the combined length HB2a of the two radiating sections 24b provided on both sides of the dielectric substrate 24a is 42 mm ≒ 0.59 λc. The length HB2b of the power supply section 24c is 22 mm ≒ 0.31 λc. The size of the dielectric substrate 24a on which these radiating sections 24b and power supply section 24c are provided is 43 mm in length (horizontal direction in the figure) and 27.5 (= 16.5 + 11) mm in height (vertical direction in the figure).

Figure 10 is a diagram showing an arrangement of HB2 elements 24. The HB2 elements 24 are configured by combining two elements as described above, with one HB2 element 24 forming two systems. In the example shown in Figure 10, ten HB2 elements 24 are arranged in a 3 x 3 square along the x-y directions. Also, in the example shown in Figure 10, the ten HB2 elements 24 are arranged so as to fit within one square area formed by the LB elements 21 (in the illustrated example, the top-left area in the division of the square areas described above).

Here, each HB2 element 24 is arranged so that two elements are tilted at 45 degrees with respect to the direction in which the LB elements 21 are arranged (x-y direction). Because the HB2 elements 24 are smaller in size than the HB1 elements 23, even if three HB2 elements 24 are arranged with each element aligned along the x-y direction, the length does not exceed the length of the LB element 21. However, in this embodiment, the HB2 elements 24 are also arranged with an inclination, thereby narrowing the spacing between the HB2 elements 24 in the array.

As shown in FIG. 2, the HB2 elements 24 are arranged in two sets at two diagonal locations (the top-left area and the bottom-right area in the example shown in FIG. 2) in the square area formed by the LB elements 21. Therefore, the HB2 elements 24 are arranged in two sets of two systems, making a total of four systems. The HB2 elements 24 have a larger number of systems because the size of the elements is smaller than the LB elements 21 and MB elements 22.

By arranging the antenna elements 20 as described above, one set of LB elements 21, one set of MB elements 22, two sets of HB1 elements 23, and two sets of HB2 elements 24 are all arranged within a 3 x 3 area of the square area of the LB elements 21. This results in the smallest size of an antenna device 100 in which the same number of antenna elements 20 are arranged without overlapping each other.

The two sets of HB1 elements 23 and HB2 elements 24 are arranged so that they are located diagonally in the 3×3 square region of the LB elements 21. Therefore, the two sets of HB1 elements 23 are arranged so that the distance between them is the furthest position within the 3×3 square region of the LB elements 21. Similarly, the two sets of HB2 elements 24 are arranged so that the distance between them is the furthest position within the 3×3 square region of the LB elements 21. Therefore, compared to when the two sets of HB1 elements 23 and HB2 elements 24 are arranged close to each other, mutual interference between the arrays is suppressed.

<Antenna element characteristics>
Fig. 11 is a diagram showing the directivity pattern of the LB element 21. Fig. 11(A) is a diagram showing the electric field in-plane directivity, and Fig. 11(B) is a diagram showing the magnetic field in-plane directivity. In the example shown in Fig. 11, both side lobes are sufficiently small, and the spread of the main lobe is about 30 degrees, showing good directivity characteristics.

Figure 12 shows the directivity pattern of the MB element 22. Figure 12 (A) shows the directivity in the vertical plane, and Figure 12 (B) shows the directivity in the horizontal plane. The MB element 22 is arranged with two orthogonal elements tilted at 45 degrees, so the polarization plane of both the vertical and horizontal directivities is -45 degrees. In the example shown in Figure 12, both side lobes are sufficiently small, and the spread of the main lobe is about 30 degrees, indicating good directional characteristics.

Figure 13 shows the directivity pattern of the HB1 element 23. Figure 13 (A) shows the directivity in the vertical plane, and Figure 13 (B) shows the directivity in the horizontal plane. The HB1 element 23 has two orthogonal elements arranged with an inclination of 45 degrees, so the polarization plane of both the vertical and horizontal directivities is -45 degrees. In the example shown in Figure 13, both side lobes are sufficiently small, and the spread of the main lobe is about 30 degrees, showing good directivity characteristics.

Figure 14 shows the directivity pattern of the HB2 element 24. Figure 14 (A) shows the directivity in the vertical plane, and Figure 14 (B) shows the directivity in the horizontal plane. The HB2 element 24 has two orthogonal elements arranged with a 45 degree inclination, so the polarization plane of both the vertical and horizontal directivities is -45 degrees. In the example shown in Figure 14, both side lobes are sufficiently small, and the spread of the main lobe is about 30 degrees, showing good directional characteristics.

<Modification>
In the above embodiment, the arrangement of the antenna elements 20 for each frequency band is 3×4 for the LB element 21, and 3×3 for the MB element 22, the HB1 element 23, and the HB2 element 24, but the number of each antenna element 20 is not limited to the number in the above embodiment. The antenna device 100 of this embodiment may be arranged such that the antenna elements 20 are arranged as follows.

First, the LB elements 21 are arranged so as to line up a square area formed by arranging two sets of two antenna elements, each having radiation parts in two orthogonal directions, on all four sides. Then, the MB elements 22 are arranged across multiple square areas, including the square area located in the center of the arrangement of square areas formed by the LB elements 21. Then, the HB1 elements 23 and the HB2 elements 24 are arranged in one or multiple square areas, including the square areas located at the corners of the arrangement of square areas formed by the LB elements 21. When arranging two sets of arrays of the HB1 elements 23 and the HB2 elements 24, they are arranged in two locations located diagonally.

Figure 15 is a diagram showing a modified arrangement of antenna elements 20 according to this embodiment. In the example shown in Figure 15, MB elements 22 are indicated by a cross "x", HB1 elements 23 by a diamond "◇", and HB2 elements 24 by a circle "○". The number of antenna elements 20 shown in Figure 15 is 5 x 6 LB elements 21 per system, 5 x 5 MB elements 22 and HB1 elements 23 per system, and 6 x 6 HB2 elements 24 per system.

In the example shown in FIG. 15, the LB elements 21 are arranged in six rows in the y direction, each row having five LB elements 21 aligned along the x direction, and six rows in the x direction, each having five LB elements 21 aligned along the y direction. The LB elements 21 are arranged so that a square region surrounded on all four sides by two LB elements 21 aligned along the x direction and two LB elements 21 aligned along the y direction is formed, and these square regions are arranged in a 5 x 5 matrix of 25 regions along the x and y directions.

The MB elements 22 are arranged in a 5 x 5 square (diamond) at an angle of 45 degrees with respect to the x-y direction. In the example shown in FIG. 15, the 25 MB elements 22 are arranged across multiple square regions formed by the LB elements 21. Specifically, five MB elements 22 are arranged in the central square region, four in each of the four square regions adjacent to the central square region on the top, bottom, left and right, and one in each of the four square regions adjacent to the upper left, upper right, lower left and lower right of the central square region.

The HB1 elements 23 are arranged in a 5 x 5 square array along the x-y direction. In the example shown in FIG. 15, the 25 HB1 elements 23 are arranged in a set in the four square areas in the lower left corner and the four square areas in the upper right corner in the arrangement of the square areas formed by the LB elements 21. Specifically, in one set of arrays, nine HB1 elements 23 are arranged in the square area in the lower left corner, six in each of the two square areas adjacent to the upper and right of the square area in the lower left corner, and four in one square area adjacent to the upper right of the square area in the lower left corner. Similarly, in another set of arrays, nine HB1 elements 23 are arranged in the square area in the upper right corner, six in each of the two square areas adjacent to the lower and left of the square area in the upper right corner, and four in one square area adjacent to the lower left of the square area in the upper right corner.

The HB2 elements 24 are arranged in a 6 x 6 square array along the x-y direction. In the example shown in FIG. 15, the 36 HB2 elements 24 are arranged in a set in the four square areas in the upper left corner and the four square areas in the lower right corner of the arrangement of square areas formed by the LB elements 21. Specifically, in one set of arrays, nine HB2 elements 24 are arranged in each of the square areas in the upper left corner, the two square areas adjacent to the lower and right of the square area in the upper left corner, and the square area adjacent to the lower right of the square area in the upper left corner. Similarly, in another set of arrays, nine HB2 elements 24 are arranged in each of the square areas in the lower right corner, the two square areas adjacent to the upper and left of the square area in the lower right corner, and the square area adjacent to the lower left of the square area in the upper right corner.

Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above embodiments. For example, in the above embodiments, examples of (odd) x (odd) areas (3 x 3 area in Figure 2 and 5 x 5 area in Figure 15) are shown as examples of the arrangement of square areas formed by the LB elements 21, but (even) x (even) areas may also be used. In this case, the MB elements 22 are arranged across at least the four central square areas. In addition, various modifications and alternative configurations that do not deviate from the scope of the technical concept of the present invention are included in the present invention.

10...base, 20...antenna element, 21...LB element, 22...MB element, 23...HB1 element, 24...HB2 element, 100...antenna device

Claims (9)

The antenna is configured by arranging three or more types of antenna elements corresponding to different frequency bands,
the first antenna elements are arranged so as to align a square region formed by arranging two sets of antenna elements of two systems, each having a radiation portion in two orthogonal directions, on all four sides;
the second antenna element is disposed across a plurality of square regions including a square region located at a center of the array of square regions;
An antenna device characterized in that a third antenna element is arranged in one or more square areas, including a square area located at a corner of the array of square areas, so as not to overlap with the arrangement of the second antenna element. The antenna device according to claim 1, characterized in that the set of second antenna elements is arranged in a direction tilted by 45 degrees with respect to the direction in which the square areas of the first antenna elements are arranged. The antenna device according to claim 2, characterized in that the second antenna element has two systems of mutually orthogonal radiating parts, and the radiating parts are arranged at an angle of 45 degrees to the radiating part of the first antenna element. The antenna device according to claim 1, characterized in that the array of the third set of antenna elements is arranged within one square area in the arrangement of the square areas of the first antenna elements. The antenna device according to claim 4, characterized in that the third antenna element has two systems of mutually orthogonal radiating parts, and the radiating parts are arranged at an angle of 45 degrees to the radiating part of the first antenna element. The antenna device according to claim 1, characterized in that the third antenna elements are arranged in two sets at two diagonal positions in the arrangement of the square region of the first antenna elements. a fourth antenna element corresponding to a frequency band different from the first to third antenna elements;
7. The antenna device according to claim 6, wherein the arrangement of the fourth antenna elements is arranged in two sets at two diagonals different from the diagonal at which the arrangement of the third antenna elements is arranged in the arrangement of the square region of the first antenna elements. the second antenna element is an antenna element corresponding to a higher frequency band than the first antenna element,
2. The antenna device according to claim 1, wherein the third antenna element is an antenna element compatible with a higher frequency band than the second antenna element. a fourth antenna element corresponding to a higher frequency band than the third antenna element;
9. The antenna device according to claim 8, wherein the third antenna element and the fourth antenna element are arranged in pairs at two different diagonal positions in the arrangement of the square region defined by the first antenna elements.