Multilayer substrate and wiring substrate

Abstract

In the present invention, a stack has a structure in which a plurality of insulator layers are stacked along a Z-axis. A first radiating conductor layer receives or radiates a first high frequency signal, and also receives or radiates a second high frequency signal. The oscillating direction of an electromagnetic field due to the second high frequency signal propagating in air differs from the oscillating direction of an electromagnetic field due to the first high frequency signal propagating in air. The second radiating conductor layer is positioned on the negative side of the Z-axis with respect to the first radiating conductor layer, and overlaps the first radiating conductor layer when viewed in the negative direction of the Z-axis. A first signal path and a second signal path are connected to the first radiating conductor layer. The first high frequency signal is transmitted on the first signal path. The second high frequency signal is transmitted on the second signal path. A first connection conductor is connected to the first signal path and the second signal path, and is positioned on the negative side of the Z-axis with respect to the second radiating conductor layer.

Description

Multilayer boards and wiring boards

[0001] The present invention relates to a multilayer substrate comprising a plurality of radiating conductor layers.

[0002] A known example of a conventional invention relating to a multilayer substrate is the multilayer patch antenna described in Patent Document 1. This multilayer patch antenna includes a parasitic patch radiator that radiates two orthogonally polarized high-frequency signals.

[0003] Special Publication No. 2022-502909

[0004] Incidentally, in the multi-layer patch antenna described in Patent Document 1, there is a demand for improving the isolation between the high-frequency signals of the two orthogonal polarized waves.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to improve the isolation between the first and second high frequency signals.

[0006] A multilayer substrate according to one embodiment of the present invention includes: a laminate, a first radiating conductor layer, a second radiating conductor layer, a first signal path, a second signal path, and a first connecting conductor; the laminate has a structure in which a plurality of insulator layers are stacked along a Z axis; the first radiating conductor layer is provided on the laminate, and receives or radiates a first high-frequency signal and receives or radiates a second high-frequency signal; the vibration direction of an electromagnetic field caused by the second high-frequency signal propagating through the air is different from the vibration direction of the electromagnetic field caused by the first high-frequency signal propagating through the air; the second radiating conductor layer is provided on the laminate, and is located on the negative side of the Z axis of the first radiating conductor layer and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path and the second signal path are connected to the first radiating conductor layer; the first high-frequency signal is transmitted through the first signal path; and the second high-frequency signal is transmitted through the second signal path. The first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path, and is located on the negative side of the Z axis from the second radiating conductor layer.

[0007] A multilayer substrate according to one embodiment of the present invention comprises a laminate, a first radiation conductor layer, a second radiation conductor layer, a first signal path, a second signal path, and a first connecting conductor, wherein the laminate has a structure in which a plurality of insulator layers are stacked along a Z axis, the first radiation conductor layer is provided on the laminate, and a first feed point and a second feed point are provided on the first radiation conductor layer, and when viewed in the negative direction of the Z axis, the second feed point is not in a point-symmetric relationship with the first feed point with respect to the center of gravity of a figure defined by an outer edge of the first radiation conductor layer, the second radiation conductor layer is provided on the laminate, and is located on the negative side of the Z axis of the first radiation conductor layer, and overlaps with the first radiation conductor layer when viewed in the negative direction of the Z axis, and the first signal path and the second signal path are connected to the first radiation conductor layer, The first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path, and is located on the negative side of the Z axis from the second radiating conductor layer.

[0008] a first signal path portion, a second signal path portion, and a first connecting conductor; an antenna component is mounted on the first laminate; the antenna component is located on the positive side of the first laminate along the Z axis; the antenna component includes a second laminate, a first radiation conductor layer, and a second radiation conductor layer; the first laminate has a structure in which a plurality of insulating layers are stacked along the Z axis; the second laminate has a structure in which a plurality of insulating layers are stacked along the Z axis; the first radiation conductor layer is provided on the second laminate, and receives or radiates a first high frequency signal and receives or radiates a second high frequency signal; the vibration direction of an electromagnetic field caused by the second high frequency signal propagating through the air is different from the vibration direction of an electromagnetic field caused by the first high frequency signal propagating through the air; the second radiating conductor layer is provided on the second laminate, and is located on the negative side of the Z axis from the first radiating conductor layer, and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path portion and the second signal path portion are provided on the first laminate, and are electrically connected to the first radiating conductor layer; the first high-frequency signal is transmitted through the first signal path portion; the second high-frequency signal is transmitted through the second signal path portion; the first connecting conductor is provided on the second laminate, and is connected to the first signal path portion and the second signal path portion, and is located on the negative side of the Z axis from the second radiating conductor layer.

[0009] According to the present invention, the isolation between the first high-frequency signal and the second high-frequency signal can be improved.

[0010] Fig. 1 is an exploded perspective view of a multilayer substrate 10. Fig. 2 is a rear view of the multilayer substrate 10 when in use. Fig. 3 is an exploded perspective view of a multilayer substrate 10a. Fig. 4 is an exploded perspective view of a multilayer substrate 10b.

[0011] (Embodiment) [Structure of Multilayer Substrate 10] The structure of a multilayer substrate 10 according to one embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is an exploded perspective view of the multilayer substrate 10. Fig. 2 is a rear view of the multilayer substrate 10 when in use.

[0012] Hereinafter, the stacking direction of the laminate 12 of the multilayer substrate 10 is defined as the up-down direction. The up-down axis coincides with the Z axis. The up direction is the positive direction of the Z axis. The down direction is the negative direction of the Z axis. When looking at the laminate 12 from below, the two axes along which the sides of the laminate 12 extend are defined as the left-right axis and the front-rear axis. The left-right axis is perpendicular to the up-down axis. The front-rear axis is perpendicular to the up-down axis and the left-right axis. Note that the definitions of directions in this specification are merely examples. Therefore, the directions in this specification do not necessarily coincide with the directions when the multilayer substrate 10 is actually used.

[0013] In the following, X is a component or member of the multilayer substrate 10. In this specification, unless otherwise specified, each part of X is defined as follows: The front part of X means the front half of X. The rear part of X means the rear half of X. The left part of X means the left half of X. The right part of X means the right half of X. The upper part of X means the upper half of X. The lower part of X means the lower half of X. The front end of X means the front end of X. The rear end of X means the rear end of X. The left end of X means the left end of X. The right end of X means the right end of X. The upper end of X means the upper end of X. The lower end of X means the lower end of X. The front end of X means the front end of X and its vicinity. The rear end of X means the rear end of X and its vicinity. The left end of X means the left end of X and its vicinity. The right end of X means the right end of X and its vicinity. The upper end of X means the upper end of X and its vicinity. The lower end of X means the lower end of X and its vicinity.

[0014] The multilayer substrate 10 is used as an antenna and a transmission line. The multilayer substrate 10 is electrically connected to, for example, a circuit board. As shown in FIG. 1 , the multilayer substrate 10 includes a laminate 12, a first ground conductor layer 16, a second ground conductor layer 18, a first radiation conductor layer 20, a second radiation conductor layer 21, a first connecting conductor 22, a first signal path R1, and a second signal path R2.

[0015] The laminate 12 has a plate shape. As shown in Figures 1 and 2, the laminate 12 has a strip shape extending along the left-right axis when viewed downward. The laminate 12 has a structure in which insulator layers 14a to 14g are stacked along the up-down axis (Z-axis). The insulator layers 14a to 14g are arranged in this order from top to bottom.

[0016] The insulator layers 14e to 14g have a strip shape extending along the left-right axis when viewed downward. The insulator layers 14a to 14d have a rectangular shape when viewed downward. Therefore, the length of the insulator layers 14e to 14g along the left-right axis is longer than the length of the insulator layers 14a to 14d along the left-right axis. When viewed downward, the insulator layers 14a to 14d overlap the left ends of the insulator layers 14e to 14g. The insulator layers 14a to 14g are made of a thermoplastic resin such as polyimide or liquid crystal polymer. Therefore, the laminate 12 is flexible. Furthermore, the insulator layers 14a to 14g are fused together with adjacent layers vertically.

[0017] The first radiating conductor layer 20 radiates a first high-frequency signal and a second high-frequency signal. The first radiating conductor layer 20 is provided on the laminate 12. In this embodiment, the first radiating conductor layer 20 is located on the upper main surface of the insulator layer 14a. As shown in FIG. 1 , the first radiating conductor layer 20 has a square shape with sides extending along the front-rear axis and the left-right axis when viewed from below. The length of one side of the first radiating conductor layer 20 is half the wavelength within the resonant frequency band of the first radiating conductor layer 20. The wavelength of the first high-frequency signal and the second high-frequency signal belong to the resonant frequency band of the first radiating conductor layer 20. The resonant mode of the first radiating conductor layer 20 is the fundamental mode.

[0018] The second radiating conductor layer 21 radiates the third high-frequency signal and also radiates the fourth high-frequency signal. The second radiating conductor layer 21 is provided on the laminate 12. In this embodiment, the second radiating conductor layer 21 is located on the upper main surface of the insulator layer 14b. As a result, the second radiating conductor layer 21 is located below the first radiating conductor layer 20 (on the negative side of the Z axis).

[0019] 3 , the second radiation conductor layer 21 overlaps with the first radiation conductor layer 20 when viewed downward (negative direction of the Z axis). When viewed downward, the second radiation conductor layer 21 has a square shape with sides extending along the front-rear axis and the left-right axis. However, the area of ​​the second radiation conductor layer 21 is larger than the area of ​​the first radiation conductor layer 20. Therefore, when viewed downward, none of the four sides of the second radiation conductor layer 21 overlaps with the first radiation conductor layer 20. When viewed downward, the first radiation conductor layer 20 is contained within the outer edge of the second radiation conductor layer 21. When viewed downward, the intersection of the diagonals of the second radiation conductor layer 21 coincides with the intersection of the diagonals of the first radiation conductor layer 20. In other words, when viewed downward (negative direction of the Z axis), the center of gravity of the figure defined by the outer edge of the second radiation conductor layer 21 coincides with the center of gravity of the figure defined by the outer edge of the first radiation conductor layer 20.

[0020] The resonant frequency band of the second radiating conductor layer 21 is lower than the resonant frequency band of the first radiating conductor layer 20. In this embodiment, the difference between the resonant frequency band of the first radiating conductor layer 20 and the resonant frequency band of the second radiating conductor layer 21 is 10% or more of the frequency of the first high-frequency signal and the frequency of the second high-frequency signal. However, the difference between the resonant frequency band of the first radiating conductor layer 20 and the resonant frequency band of the second radiating conductor layer 21 may be smaller than 10% of the frequency of the first high-frequency signal and the frequency of the second high-frequency signal.

[0021] The first signal path R1 is connected to the first radiation conductor layer 20. The first signal path R1 includes a first signal conductor layer 24 and an interlayer connection conductor v1. The first signal conductor layer 24 is located on the upper main surface of the insulator layer 14f. The first signal conductor layer 24 has a linear shape extending along the left-right axis when viewed downward. The left end of the first signal conductor layer 24 overlaps the first radiation conductor layer 20 when viewed downward. The interlayer connection conductor v1 penetrates the insulator layers 14a to 14e along the up-down axis. The upper end of the interlayer connection conductor v1 is connected behind the intersection of the diagonals of the first radiation conductor layer 20. The lower end of the interlayer connection conductor v1 is connected to the left end of the first signal conductor layer 24.

[0022] The first high-frequency signal is transmitted through the first signal path R1. Therefore, the first high-frequency signal is supplied to the first radiation conductor layer 20 via the interlayer connection conductor v1. The interlayer connection conductor v1 is connected after the intersection of the diagonal lines of the first radiation conductor layer 20. Hereinafter, the point where the interlayer connection conductor v1 is connected to the first radiation conductor layer 20 is referred to as the first feeding point P1. The first high-frequency signal resonates in the first radiation conductor layer 20 so that a current flows in a direction along the front-rear axis.

[0023] The second signal path R2 is connected to the first radiation conductor layer 20. The second signal path R2 includes a second signal conductor layer 26 and an interlayer connection conductor v2. The second signal conductor layer 26 is located on the upper main surface of the insulator layer 14f. The second signal conductor layer 26 has a linear shape extending along the left-right axis when viewed downward. The left end of the second signal conductor layer 26 overlaps the first radiation conductor layer 20 when viewed downward. The interlayer connection conductor v2 penetrates the insulator layers 14a to 14e along the up-down axis. The upper end of the interlayer connection conductor v2 is connected to the right of the intersection of the diagonals of the first radiation conductor layer 20. Hereinafter, the point where the interlayer connection conductor v2 is connected to the first radiation conductor layer 20 is referred to as the second feeding point P2. In this way, the first radiation conductor layer 20 is provided with a first feeding point P1 and a second feeding point P2. When viewed downward (in the negative direction of the Z axis), the second feed point P2 is not point-symmetric with the first feed point P1 with respect to the center of gravity of a figure defined by the outer edge of the first radiation conductor layer 20. In this embodiment, the second feed point P2 is not point-symmetric with the first feed point P1 with respect to the intersection of the diagonal lines of the first radiation conductor layer 20. The lower end of the interlayer connection conductor v2 is connected to the left end of the second signal conductor layer 26.

[0024] The second high-frequency signal is transmitted through the second signal path R2. Therefore, the second high-frequency signal is supplied to the first radiation conductor layer 20 via the interlayer connection conductor v2. The interlayer connection conductor v2 is connected to the right of the intersection of the diagonal lines of the first radiation conductor layer 20. The second high-frequency signal resonates in the first radiation conductor layer 20 so that a current flows in the direction along the left-right axis. Therefore, the vibration direction of the electromagnetic field caused by the second high-frequency signal propagating through the air is different from the vibration direction of the electromagnetic field caused by the first high-frequency signal propagating through the air. In this embodiment, the vibration direction of the electromagnetic field caused by the second high-frequency signal propagating through the air is perpendicular to the vibration direction of the electromagnetic field caused by the first high-frequency signal propagating through the air.

[0025] The third signal path R3 is connected to the second radiation conductor layer 21. The third signal path R3 includes a third signal conductor layer 28 and an interlayer connection conductor v3. The third signal conductor layer 28 is located on the upper main surface of the insulator layer 14f. The third signal conductor layer 28 has a linear shape extending along the left-right axis when viewed downward. The left end of the third signal conductor layer 28 overlaps the second radiation conductor layer 21 when viewed downward. The interlayer connection conductor v3 penetrates the insulator layers 14a to 14e along the up-down axis. The upper end of the interlayer connection conductor v3 is connected to the left of the intersection of the diagonals of the second radiation conductor layer 21. Hereinafter, the point where the interlayer connection conductor v3 is connected to the second radiation conductor layer 21 is referred to as the third feeding point P3. The lower end of the interlayer connection conductor v3 is connected to the left end of the third signal conductor layer 28.

[0026] The third high-frequency signal is transmitted through the third signal path R3. Therefore, the third high-frequency signal is supplied to the second radiation conductor layer 21 via the interlayer connection conductor v3. The interlayer connection conductor v3 is connected to the left of the intersection of the diagonal lines of the second radiation conductor layer 21. Therefore, the third high-frequency signal resonates in the second radiation conductor layer 21 so that a current flows in the direction along the left-right axis.

[0027] The fourth signal path R4 is connected to the second radiation conductor layer 21. The fourth signal path R4 includes a fourth signal conductor layer 30 and an interlayer connection conductor v4. The fourth signal conductor layer 30 is located on the upper main surface of the insulator layer 14f. The fourth signal conductor layer 30 has a linear shape extending along the left-right axis when viewed downward. The left end of the fourth signal conductor layer 30 overlaps the second radiation conductor layer 21 when viewed downward. The interlayer connection conductor v4 penetrates the insulator layers 14a to 14e along the up-down axis. The upper end of the interlayer connection conductor v4 is connected in front of the intersection of the diagonals of the second radiation conductor layer 21. Hereinafter, the point where the interlayer connection conductor v4 is connected to the second radiation conductor layer 21 will be referred to as the fourth feed point P4. The fourth feed point P4 is point-symmetric with the third feed point P3 with respect to the intersection of the diagonals of the second radiation conductor layer 21. The lower end of the interlayer connection conductor v 4 is connected to the left end of the fourth signal conductor layer 30 .

[0028] The fourth high-frequency signal is transmitted through a fourth signal path R4. Therefore, the fourth high-frequency signal is supplied to the second radiation conductor layer 21 via the interlayer connection conductor v4. The interlayer connection conductor v4 is connected in front of the intersection of the diagonal lines of the second radiation conductor layer 21. The fourth high-frequency signal resonates in the second radiation conductor layer 21 so that a current flows in the direction along the front-to-rear axis. Therefore, the vibration direction of the electromagnetic field caused by the fourth high-frequency signal propagating through the air is different from the vibration direction of the electromagnetic field caused by the third high-frequency signal propagating through the air. In this embodiment, the vibration direction of the electromagnetic field caused by the fourth high-frequency signal propagating through the air is perpendicular to the vibration direction of the electromagnetic field caused by the third high-frequency signal propagating through the air.

[0029] The first ground conductor layer 16 is provided on the laminate 12. In this embodiment, the first ground conductor layer 16 is located on the upper main surface of the insulator layer 14e. As a result, the first ground conductor layer 16 is located below (on the negative side of the Z axis) the second radiation conductor layer 21. The first ground conductor layer 16 is located above the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30.

[0030] The first ground conductor layer 16 covers substantially the entire upper main surface of the insulator layer 14e. As a result, the first ground conductor layer 16 overlaps with the first radiation conductor layer 20 and the second radiation conductor layer 21 when viewed downward (negative direction of the Z axis). Therefore, the first radiation conductor layer 20, the second radiation conductor layer 21, and the first ground conductor layer 16 function as a patch antenna. Furthermore, the first ground conductor layer 16 overlaps with the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30 when viewed downward.

[0031] The second ground conductor layer 18 is provided on the laminate 12. In this embodiment, the second ground conductor layer 18 is located on the upper main surface of the insulator layer 14g. As a result, the second ground conductor layer 18 is located below (on the negative side of the Z axis) the first ground conductor layer 16. The second ground conductor layer 18 is located below the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30.

[0032] The second ground conductor layer 18 covers substantially the entire upper main surface of the insulator layer 14g. As a result, the second ground conductor layer 18 overlaps with the first ground conductor layer 16 when viewed downward (in the negative direction of the Z axis). Furthermore, the second ground conductor layer 18 overlaps with the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30 when viewed downward (in the negative direction of the Z axis). The first ground conductor layer 16 and the second ground conductor layer 18 are connected to the ground potential. As a result, the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, the fourth signal conductor layer 30, the first ground conductor layer 16, and the second ground conductor layer 18 have a stripline structure.

[0033] The first connecting conductor 22 is provided on the laminate 12. In this embodiment, the first connecting conductor 22 is a conductor layer located on the upper main surface of the insulator layer 14d. Therefore, the first connecting conductor 22 is located below the second radiating conductor layer 21 (negative side of the Z axis) and above the first ground conductor layer 16 (positive side of the Z axis). Furthermore, the distance from the first connecting conductor 22 to the first ground conductor layer 16 on the vertical axis (Z axis) is shorter than the distance from the first connecting conductor 22 to the second radiating conductor layer 21 on the vertical axis (Z axis). Moreover, the first connecting conductor 22 overlaps with the second radiating conductor layer 21 when viewed in the downward direction.

[0034] Such a first connecting conductor 22 is connected to the first signal path R1 and the second signal path R2. In this embodiment, the first connecting conductor 22 has a linear shape having a first end t1 and a second end t2 when viewed from below. The first end t1 of the first connecting conductor 22 is connected to the interlayer connecting conductor v1. The second end t2 of the first connecting conductor 22 is connected to the interlayer connecting conductor v2.

[0035] The multilayer substrate 10 is designed to satisfy the following conditions: The phase difference between the first high-frequency signal input to the interlayer connection conductor v2 in the first radiation conductor layer 20 and the first high-frequency signal input to the interlayer connection conductor v2 via the first connecting conductor 22 is an odd multiple of 180°. It is sufficient that the first high-frequency signal input to the interlayer connection conductor v2 without passing through the first connecting conductor 22 is attenuated by the first high-frequency signal input to the interlayer connection conductor v2 via the first connecting conductor 22 within the operating band. Furthermore, the phase difference between the second high-frequency signal input to the interlayer connection conductor v1 in the first radiation conductor layer 20 and the second high-frequency signal input to the interlayer connection conductor v1 via the first connecting conductor 22 is an odd multiple of 180°. It is sufficient that the phase difference between the second high-frequency signal input to the interlayer connection conductor v1 without passing through the first connecting conductor 22 is attenuated by the second high-frequency signal input to the interlayer connection conductor v1 via the first connecting conductor 22 within the operating band.

[0036] The first ground conductor layer 16, the second ground conductor layer 18, the first radiation conductor layer 20, the second radiation conductor layer 21, the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30 are formed, for example, by patterning metal foil attached to the upper main surfaces of the insulator layers 14a to 14g. The metal is, for example, copper. The interlayer connection conductors v1 to v4 are, for example, via-hole conductors. The via-hole conductors are formed by forming through-holes in the insulator layers 14a to 14e, filling the through-holes with conductive paste, and sintering the conductive paste.

[0037] Next, an example of how the multilayer substrate 10 can be used will be described. As shown in FIG. 1 , the multilayer substrate 10 has a first section A1 and a second section A2. The first section A1 includes a first radiating conductor layer 20 and a second radiating conductor layer 21. The second section A2 does not include the first radiating conductor layer 20 or the second radiating conductor layer 21. The thickness of the first section A1 from top to bottom is greater than the thickness of the second section A2 from top to bottom. Therefore, the second section A2 is more likely to bend upward or downward than the first section A1.

[0038] Therefore, in the multilayer substrate 10, the second section A2 is bent as shown in Figure 2. A connector 100 is mounted on the end of the second section A2. The connector 100 is connected to a connector provided on a circuit board (not shown). The multilayer substrate 10 may also be connected to another circuit board without using the connector 100.

[0039] [Effect] Isolation between the first and second high-frequency signals can be improved according to the multilayer substrate 10. More specifically, at the first feed point P1 and the second feed point P2 of the first connecting conductor 22, when the first high-frequency signal enters the interlayer connecting conductor v2 from the first feed point P1 via the second feed point P2, the first high-frequency signal becomes noise.

[0040] Therefore, the first connecting conductor 22 is connected to the first signal path R1 and the second signal path R2. A phase difference occurs between the first high-frequency signal input to the interlayer connecting conductor v2 in the first radiation conductor layer 20 and the first high-frequency signal input to the interlayer connecting conductor v2 via the first connecting conductor 22. This causes the first high-frequency signal input to the interlayer connecting conductor v2 in the first radiation conductor layer 20 and the first high-frequency signal input to the interlayer connecting conductor v2 via the first connecting conductor 22 to cancel each other out. As a result, the first high-frequency signal is prevented from becoming noise. For the same reason, the second high-frequency signal is prevented from becoming noise.

[0041] Here, the first connecting conductor 22 is designed to suppress the first high-frequency signal that enters the interlayer connecting conductor v2 from the second feeding point P2 from becoming noise. Similarly, the first connecting conductor 22 is designed to suppress the second high-frequency signal that enters the interlayer connecting conductor v1 from the first feeding point P1 from becoming noise. Specifically, the phase difference between the first high-frequency signal input to the interlayer connecting conductor v2 on the first radiation conductor layer 20 and the first high-frequency signal input to the interlayer connecting conductor v2 via the first connecting conductor 22 is an odd multiple of 180°. It is sufficient that the phase state is such that the first high-frequency signal input to the interlayer connecting conductor v2 without passing through the first connecting conductor 22 within the usable band is attenuated by the first high-frequency signal input to the interlayer connecting conductor v2 via the first connecting conductor 22. Furthermore, the phase difference between the second high-frequency signal input to the interlayer connection conductor v1 in the first radiation conductor layer 20 and the second high-frequency signal input to the interlayer connection conductor v1 via the first connecting conductor 22 is an odd multiple of 180°. Note that it is sufficient that the phase state is such that the second high-frequency signal input to the interlayer connection conductor v1 without passing through the first connecting conductor 22 within the used band is attenuated by the second high-frequency signal input to the interlayer connection conductor v1 via the first connecting conductor 22.

[0042] In the multilayer substrate 10, the first connecting conductor 22 is located below (on the negative side of the Z axis) the second radiating conductor layer 21. As a result, the second radiating conductor layer 21 is located between the first radiating conductor layer 20 and the first connecting conductor 22. This prevents the electromagnetic field generated from the first radiating conductor layer 20 from reaching the first connecting conductor 22 and becoming noise.

[0043] In the multilayer substrate 10, the first ground conductor layer 16 is located between the first connecting conductor 22 and the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30. This prevents noise from entering the first connecting conductor 22 and the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30.

[0044] (First Modification) Next, a multilayer substrate 10a according to a first modification will be described with reference to the drawings. Fig. 3 is an exploded perspective view of the multilayer substrate 10a.

[0045] The multilayer substrate 10a differs from the multilayer substrate 10 in the following respects: The first connecting conductor 22 is located below the first ground conductor layer 16 (negative side of the Z axis) and above the second ground conductor layer 18 (positive side of the Z axis). The multilayer substrate 10a further includes a second connecting conductor 23. The first signal path R1 includes a first branch conductor layer 40. The second signal path R2 includes a second branch conductor layer 42. The third signal path R3 includes a third branch conductor layer 44. The fourth signal path R4 includes a fourth branch conductor layer 46.

[0046] The first connecting conductor 22 is located below the first ground conductor layer 16 (negative side of the Z axis) and above the second ground conductor layer 18 (positive side of the Z axis). In this embodiment, the first connecting conductor 22 is a conductor layer located on the upper main surface of the insulator layer 14 f. The first connecting conductor 22 is connected to the first signal conductor layer 24 and the second signal conductor layer 26.

[0047] The second connecting conductor 23 is provided in the laminate 12. The second connecting conductor 23 is located below the first ground conductor layer 16 (on the negative side of the Z axis) and above the second ground conductor layer 18. In this embodiment, the second connecting conductor 23 is a conductor layer located on the upper main surface of the insulator layer 14f. The second connecting conductor 23 is connected to the third signal path R3 and the fourth signal path R4. In this embodiment, the second connecting conductor 23 is connected to the third signal conductor layer 28 and the fourth signal conductor layer 30.

[0048] The first signal path R1 is provided with a first branched conductor layer 40. In this embodiment, the first branched conductor layer 40 is connected to the first signal conductor layer 24. The first branched conductor layer 40 traps the third and fourth high-frequency signals. The first branched conductor layer 40 is, for example, an open stub. Therefore, the length of the first branched conductor layer 40 is, for example, ¼ of the wavelength within the resonant frequency band of the second radiation conductor layer 21.

[0049] The second signal path R2 is provided with a second branched conductor layer 42. In this embodiment, the second branched conductor layer 42 is connected to the second signal conductor layer 26. The second branched conductor layer 42 traps the third and fourth high-frequency signals. The second branched conductor layer 42 is, for example, an open stub. Therefore, the length of the second branched conductor layer 42 is, for example, ¼ of the wavelength within the resonant frequency band of the second radiation conductor layer 21.

[0050] The third signal path R3 includes a third branched conductor layer 44. In this embodiment, the third branched conductor layer 44 is connected to the third signal conductor layer 28. The third branched conductor layer 44 traps the first and second high-frequency signals. The third branched conductor layer 44 is, for example, an open stub. Therefore, the length of the third branched conductor layer 44 is, for example, ¼ of the wavelength of the resonant frequency band of the first radiation conductor layer 20.

[0051] The fourth signal path R4 is provided with a fourth branched conductor layer 46. In this embodiment, the fourth branched conductor layer 46 is connected to the fourth signal conductor layer 30. The fourth branched conductor layer 46 traps the first high-frequency signal and the second high-frequency signal. The fourth branched conductor layer 46 is, for example, an open stub. Therefore, the length of the fourth branched conductor layer 46 is, for example, ¼ of the wavelength within the resonant frequency band of the first radiation conductor layer 20. The other structure of the multilayer substrate 10a is the same as that of the multilayer substrate 10, so a description thereof will be omitted. The multilayer substrate 10a can achieve the same effects as the multilayer substrate 10.

[0052] In the multilayer substrate 10a, the provision of the first connecting conductor 22 improves isolation between the third and fourth high-frequency signals for the same reason that it improves isolation between the first and second high-frequency signals. The second connecting conductor 23 is designed to prevent the third high-frequency signal from penetrating the interlayer connecting conductor v4 from the fourth feeding point P4 from becoming noise. Similarly, the second connecting conductor 23 is designed to prevent the fourth high-frequency signal from penetrating the interlayer connecting conductor v3 from the third feeding point P3 from becoming noise. The design method for the second connecting conductor 23 is similar to the design method for the first connecting conductor 22, and therefore a description thereof will be omitted.

[0053] In the multilayer substrate 10a, the first connecting conductor 22 is located below (on the negative side of the Z axis) the first ground conductor layer 16. As a result, the first ground conductor layer 16 is located between the first connecting conductor 22 and the first radiation conductor layer 20 and the second radiation conductor layer 21. This prevents the electromagnetic fields generated from the first radiation conductor layer 20 and the second radiation conductor layer 21 from reaching the first connecting conductor 22 and causing noise.

[0054] In the multilayer substrate 10a, the second connecting conductor 23 is located below (on the negative side of the Z axis) the first ground conductor layer 16. As a result, the first ground conductor layer 16 is located between the first radiating conductor layer 20 and the second radiating conductor layer 21 and the second connecting conductor 23. This prevents the electromagnetic fields generated from the first radiating conductor layer 20 and the second radiating conductor layer 21 from reaching the second connecting conductor 23 and causing noise.

[0055] In the multilayer substrate 10a, the first signal path R1 is provided with a first branched conductor layer 40. The first branched conductor layer 40 traps the third and fourth high-frequency signals. As a result, even if the third and fourth high-frequency signals radiated from the second radiation conductor layer 21 enter the first signal path R1, they are trapped by the first branched conductor layer 40. As a result, the third and fourth high-frequency signals are prevented from becoming noise in the first signal path R1.

[0056] In the multilayer substrate 10a, the second signal path R2 is provided with a second branched conductor layer 42. The second branched conductor layer 42 traps the third and fourth high-frequency signals. As a result, even if the third and fourth high-frequency signals radiated from the second radiation conductor layer 21 enter the second signal path R2, they are trapped by the second branched conductor layer 42. As a result, the third and fourth high-frequency signals are prevented from becoming noise in the second signal path R2.

[0057] In the multilayer substrate 10a, the third signal path R3 is provided with a third branched conductor layer 44. The third branched conductor layer 44 traps the first and second high-frequency signals. As a result, even if the first and second high-frequency signals radiated from the first radiation conductor layer 20 enter the third signal path R3, they are trapped by the third branched conductor layer 44. As a result, the first and second high-frequency signals are prevented from becoming noise in the third signal path R3.

[0058] In the multilayer substrate 10a, the fourth signal path R4 is provided with a fourth branched conductor layer 46. The fourth branched conductor layer 46 traps the first and second high-frequency signals. As a result, even if the first and second high-frequency signals radiated from the first radiation conductor layer 20 enter the fourth signal path R4, they are trapped by the fourth branched conductor layer 46. As a result, the first and second high-frequency signals are prevented from becoming noise in the fourth signal path R4.

[0059] Second Modification Next, a multilayer substrate 10b according to a second modification will be described with reference to the drawings. Fig. 4 is an exploded perspective view of the multilayer substrate 10b.

[0060] The multilayer substrate 10b differs from the multilayer substrate 10 in the following points: The first ground conductor layer 16 is located on the lower main surface of the insulator layer 14e. The multilayer substrate 10b includes external electrodes 124, 126, 128, and 130 instead of the first signal conductor layer 24, the second signal conductor layer 26, the third signal conductor layer 28, and the fourth signal conductor layer 30. An electronic component 200 is mounted on the lower main surface of the laminate 12 of the multilayer substrate 10b.

[0061] The external electrodes 124, 126, 128, and 130 are located on the lower main surface of the insulating layer 14e. The lower ends of the interlayer connection conductors v1 to v4 are connected to the external electrodes 124, 126, 128, and 130, respectively.

[0062] The electronic component 200 is, for example, a semiconductor integrated circuit. The electronic component 200 is mounted by soldering to the external electrodes 124, 126, 128, and 130. The other structure of the multilayer substrate 10b is the same as that of the multilayer substrate 10, so a description thereof will be omitted. The multilayer substrate 10b can achieve the same effects as the multilayer substrate 10.

[0063] Other Embodiments The multilayer substrate according to the present invention is not limited to the multilayer substrates 10, 10a, and 10b, and can be modified within the scope of the present invention. The configurations of the multilayer substrates 10, 10a, and 10b may be combined in any manner.

[0064] The first radiating conductor layer 20 may receive a first high-frequency signal and a second high-frequency signal, and the second radiating conductor layer 21 may receive a third high-frequency signal and a fourth high-frequency signal.

[0065] Note that the first branched conductor layer 40, the second branched conductor layer 42, the third branched conductor layer 44, and the fourth branched conductor layer 46 are not essential components of the multilayer substrate 10a. The multilayer substrate 10a may include any one, any two, or any three of the first branched conductor layer 40, the second branched conductor layer 42, the third branched conductor layer 44, and the fourth branched conductor layer 46.

[0066] The second connecting conductor 23 is not an essential component.

[0067] The first branched conductor layer 40, the second branched conductor layer 42, the third branched conductor layer 44 and the fourth branched conductor layer 46 may be short branched conductor layers.

[0068] The first branched conductor layer 40, the second branched conductor layer 42, the third branched conductor layer 44 and the fourth branched conductor layer 46 may be provided for the purpose of impedance matching rather than for the purpose of trapping high-frequency signals.

[0069] The first connecting conductor 22 and the second connecting conductor 23 are not limited to conductor layers, and therefore may be interlayer connecting conductors.

[0070] The multilayer substrate 10a includes one laminate 12. However, the multilayer substrate 10a may include multiple laminates. Specifically, the multilayer substrate 10a of FIG. 3 may include a first laminate and a second laminate. In this case, the first laminate includes insulator layers 14a to 14d. The insulator layers 14a to 14d are made of, for example, ceramic. The second laminate includes insulator layers 14e to 14g. The insulator layers 14e to 14g are made of a thermoplastic resin.

[0071] The antenna component includes insulator layers 14a to 14d, a first radiation conductor layer 20, and a second radiation conductor layer 21. The wiring board includes insulator layers 14e to 14g, a first ground conductor layer 16, a second ground conductor layer 18, a first signal conductor layer 24, a second signal conductor layer 26, a third signal conductor layer 28, a fourth signal conductor layer 30, and portions of interlayer connection conductors v1 to v4. The antenna component is mounted on the first laminate by soldering. At this time, the antenna component is located above the first laminate (on the positive side of the Z axis).

[0072] A portion of the interlayer connection conductor v1 and the first signal conductor layer 24 constitute a first signal path portion. The first signal path portion is electrically connected to the first radiation conductor layer 20. A portion of the interlayer connection conductor v2 and the second signal conductor layer 26 constitute a second signal path portion. The second signal path portion is electrically connected to the first radiation conductor layer 20. A portion of the interlayer connection conductor v3 and the third signal conductor layer 28 constitute a third signal path portion. The third signal path portion is electrically connected to the second radiation conductor layer 21. A portion of the interlayer connection conductor v4 and the fourth signal conductor layer 30 constitute a fourth signal path portion. The fourth signal path portion is electrically connected to the second radiation conductor layer 21.

[0073] The multilayer substrate 10 includes one laminate 12. However, the multilayer substrate 10 may include a first laminate and a second laminate, similar to the multilayer substrate 10a. That is, the first radiating conductor layer 20 may be provided on the first laminate. The first connecting conductor 22 may be provided on the second laminate. The second laminate is mounted on the first laminate by soldering. Therefore, when the first connecting conductor 22 is provided on the first laminate, variations in the length of the current path from the first radiating conductor layer 20 to the first connecting conductor 22 are likely to occur. Therefore, the first connecting conductor 22 is provided on the second laminate. This suppresses variations in the length of the current path from the first radiating conductor layer 20 to the first connecting conductor 22.

[0074] The multilayer substrate 10 may not have a portion below the insulator layer 14d, in which case the material of the insulator layers 14a to 14d may be ceramic.

[0075] The present invention has the following structure.

[0076] (1) A multilayer substrate includes a laminate, a first radiating conductor layer, a second radiating conductor layer, a first signal path, a second signal path, and a first connecting conductor, wherein the laminate has a structure in which a plurality of insulator layers are laminated along a Z axis, the first radiating conductor layer is provided on the laminate, and receives or radiates a first high-frequency signal and receives or radiates a second high-frequency signal, the vibration direction of an electromagnetic field caused by the second high-frequency signal propagating through the air is different from the vibration direction of an electromagnetic field caused by the first high-frequency signal propagating through the air, the second radiating conductor layer is provided on the laminate, and is located on the negative side of the Z axis of the first radiating conductor layer and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis, the first signal path and the second signal path are connected to the first radiating conductor layer, the first high-frequency signal is transmitted through the first signal path, and the second high-frequency signal is transmitted through the second signal path, the first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path, and is located on the negative side of the Z axis from the second radiation conductor layer.

[0077] (2) The multilayer substrate according to (1), further comprising a first ground conductor layer, the first ground conductor layer being provided on the laminate, being located on the negative side of the Z axis relative to the second radiation conductor layer, and overlapping the first radiation conductor layer and the second radiation conductor layer when viewed in the negative direction of the Z axis.

[0078] (3) The multilayer board according to (2), wherein the first connection conductor is located on the negative side of the Z axis from the second radiation conductor layer and on the positive side of the Z axis from the first ground conductor layer.

[0079] (4) The multilayer substrate according to (3), wherein a distance in the Z axis from the first connection conductor to the first ground conductor layer is shorter than a distance in the Z axis from the first connection conductor to the second radiation conductor layer.

[0080] (5) The multilayer substrate according to (2), further including a second ground conductor layer, the second ground conductor layer being provided on the laminate and positioned on the negative side of the Z axis relative to the first ground conductor layer and overlapping the first ground conductor layer when viewed in the negative direction of the Z axis, and the first connecting conductor being positioned on the negative side of the Z axis relative to the first ground conductor layer and on the positive side of the Z axis relative to the second ground conductor layer.

[0081] (6) The multilayer board according to any one of (1) to (5), further comprising a third signal path and a fourth signal path, wherein the second radiation conductor layer receives or radiates a third high-frequency signal and also receives or radiates a fourth high-frequency signal, wherein the oscillation direction of an electromagnetic field caused by the fourth high-frequency signal propagating through the air is different from the oscillation direction of an electromagnetic field caused by the third high-frequency signal propagating through the air, the third signal path and the fourth signal path are connected to the second radiation conductor layer, the third high-frequency signal is transmitted through the third signal path, and the fourth high-frequency signal is transmitted through the fourth signal path.

[0082] (7) The multilayer substrate according to (6), further comprising a second connection conductor, the second connection conductor being provided in the laminate and connected to the third signal path and the fourth signal path.

[0083] (8) The multilayer substrate according to (7), further comprising a first ground conductor layer, the first ground conductor layer being provided on the laminate and positioned on the negative side of the Z axis relative to the second radiation conductor layer and overlapping the first radiation conductor layer and the second radiation conductor layer when viewed in the negative direction of the Z axis, and the second connecting conductor being positioned on the negative side of the Z axis relative to the first ground conductor layer.

[0084] (9) The multilayer substrate according to any one of (6) to (8), wherein the second radiating conductor layer has a resonant frequency lower than the resonant frequency of the first radiating conductor layer.

[0085] (10) The multilayer substrate according to (9), wherein a difference between the resonant frequency band of the first radiating conductor layer and the resonant frequency band of the second radiating conductor layer is 10% or more of the frequency of the first high-frequency signal and the frequency of the second high-frequency signal.

[0086] (11) The multilayer substrate according to any one of (6) to (10), wherein the first signal path is provided with a first branched conductor layer, and the second signal path is provided with a second branched conductor layer.

[0087] (12) The multilayer substrate according to any one of (6) to (11), wherein the third signal path is provided with a third branched conductor layer, and the fourth signal path is provided with a fourth branched conductor layer.

[0088] (13) A multilayer substrate includes a laminate, a first radiation conductor layer, a second radiation conductor layer, a first signal path, a second signal path, and a first connecting conductor, wherein the laminate has a structure in which a plurality of insulator layers are laminated along a Z axis, the first radiation conductor layer is provided on the laminate, and a first feeding point and a second feeding point are provided on the first radiation conductor layer, and when viewed in the negative direction of the Z axis, the second feeding point is not in a point-symmetric relationship with the first feeding point with respect to the center of gravity of a figure defined by an outer edge of the first radiation conductor layer, the second radiation conductor layer is provided on the laminate, and is located on the negative side of the Z axis than the first radiation conductor layer, and overlaps with the first radiation conductor layer when viewed in the negative direction of the Z axis, and the first signal path and the second signal path are connected to the first radiation conductor layer, the first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path, and is located on the negative side of the Z axis from the second radiation conductor layer.

[0089] (14) A wiring board includes a first laminate, a first signal path portion, a second signal path portion, and a first connecting conductor, an antenna component is mounted on the first laminate, and the antenna component is located on the positive side of the first laminate along the Z axis, the antenna component includes a second laminate, a first radiation conductor layer, and a second radiation conductor layer, the first laminate has a structure in which a plurality of insulator layers are stacked along the Z axis, the second laminate has a structure in which a plurality of insulator layers are stacked along the Z axis, the first radiation conductor layer is provided on the second laminate, and receives or radiates a first high frequency signal and receives or radiates a second high frequency signal, and the vibration direction of an electromagnetic field caused by the second high frequency signal propagating through the air is different from the vibration direction of an electromagnetic field caused by the first high frequency signal propagating through the air, the second radiating conductor layer is provided on the second laminate, and is located on the negative side of the Z axis from the first radiating conductor layer, and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path portion and the second signal path portion are provided on the first laminate, and are electrically connected to the first radiating conductor layer; the first high-frequency signal is transmitted through the first signal path portion; the second high-frequency signal is transmitted through the second signal path portion; and the first connecting conductor is provided on the second laminate, and is connected to the first signal path portion and the second signal path portion, and is located on the negative side of the Z axis from the second radiating conductor layer.

[0090] 10, 10a, 10b: multilayer substrate 12: laminate 14a to 14g: insulator layer 16: first ground conductor layer 18: second ground conductor layer 20: first radiation conductor layer 21: second radiation conductor layer 22: first connecting conductor 23: second connecting conductor 24: first signal conductor layer 26: second signal conductor layer 28: third signal conductor layer 30: fourth signal conductor layer 40: first branch conductor layer 42: second branch conductor layer 44: third branch conductor layer 46: fourth branch conductor layer 100: connector 124, 126, 128, 130: external electrode 200: electronic component A1: first section A2: second section P1: first feeding point P2: second feeding point P3: third feeding point P4: fourth feeding point R1: first signal path R2: Second signal path R3: Third signal path R4: Fourth signal path t1: First end t2: Second end v1 to v4: Interlayer connecting conductors

Claims

1. the multilayer substrate includes a laminate, a first radiation conductor layer, a second radiation conductor layer, a first signal path, a second signal path, and a first connecting conductor; the laminate has a structure in which a plurality of insulating layers are laminated along the Z axis, the first radiation conductor layer is provided on the laminate, and receives or radiates a first high-frequency signal and receives or radiates a second high-frequency signal; a vibration direction of an electromagnetic field caused by the second high-frequency signal propagating through the air is different from a vibration direction of an electromagnetic field caused by the first high-frequency signal propagating through the air; the second radiating conductor layer is provided on the laminate, and is located on the negative side of the Z axis relative to the first radiating conductor layer, and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path and the second signal path are connected to the first radiation conductor layer; the first high frequency signal is transmitted through the first signal path; the second high frequency signal is transmitted through the second signal path; the first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path, and is located on the negative side of the Z axis with respect to the second radiating conductor layer; Multilayer board.

2. the multilayer substrate further includes a first ground conductor layer; the first ground conductor layer is provided on the laminate, is located on the negative side of the Z axis with respect to the second radiating conductor layer, and overlaps with the first radiating conductor layer and the second radiating conductor layer when viewed in the negative direction of the Z axis. The multilayer substrate according to claim 1 .

3. the first connection conductor is located on the negative side of the Z axis relative to the second radiation conductor layer and on the positive side of the Z axis relative to the first ground conductor layer; The multilayer substrate according to claim 2 .

4. a distance in the Z-axis direction from the first connecting conductor to the first ground conductor layer is shorter than a distance in the Z-axis direction from the first connecting conductor to the second radiation conductor layer; The multilayer substrate according to claim 3 .

5. the multilayer substrate further includes a second ground conductor layer; the second ground conductor layer is provided on the laminate, is located on the negative side of the Z axis with respect to the first ground conductor layer, and overlaps with the first ground conductor layer when viewed in the negative direction of the Z axis; the first connection conductor is located on the negative side of the Z axis relative to the first ground conductor layer and on the positive side of the Z axis relative to the second ground conductor layer; The multilayer substrate according to claim 2 .

6. the multilayer substrate further includes a third signal path and a fourth signal path; the second radiation conductor layer receives or radiates a third high-frequency signal and receives or radiates a fourth high-frequency signal; a vibration direction of an electromagnetic field caused by the fourth high frequency signal propagating through the air is different from a vibration direction of an electromagnetic field caused by the third high frequency signal propagating through the air; the third signal path and the fourth signal path are connected to the second radiation conductor layer; the third high frequency signal is transmitted through the third signal path; the fourth high frequency signal is transmitted through the fourth signal path; 6. The multilayer substrate according to claim 1.

7. the multilayer substrate further includes a second connection conductor; the second connection conductor is provided in the laminate and is connected to the third signal path and the fourth signal path. The multilayer substrate according to claim 6 .

8. the multilayer substrate further includes a second connection conductor and a first ground conductor layer; the first ground conductor layer is provided on the laminate, is located on the negative side of the Z axis with respect to the second radiation conductor layer, and overlaps with the first radiation conductor layer and the second radiation conductor layer when viewed in the negative direction of the Z axis; the second connection conductor is located on the negative side of the Z axis relative to the first ground conductor layer; The multilayer substrate according to claim 1 .

9. a resonant frequency of the second radiating conductor layer is lower than a resonant frequency of the first radiating conductor layer; 9. The multilayer substrate according to claim 1, wherein the first and second electrodes are electrically connected to each other.

10. a difference between a resonant frequency band of the first radiating conductor layer and a resonant frequency band of the second radiating conductor layer is 10% or more of a frequency of the first high frequency signal and a frequency of the second high frequency signal; The multilayer substrate according to claim 9 .

11. a first branched conductor layer is provided in the first signal path, The second signal path is provided with a second branched conductor layer. The multilayer substrate according to claim 6 .

12. a third branched conductor layer is provided in the third signal path, The fourth signal path is provided with a fourth branched conductor layer. The multilayer substrate according to claim 6 .

13. the multilayer substrate includes a laminate, a first radiation conductor layer, a second radiation conductor layer, a first signal path, a second signal path, and a first connecting conductor; the laminate has a structure in which a plurality of insulating layers are laminated along the Z axis, the first radiating conductor layer is provided on the laminate; the first radiation conductor layer is provided with a first feeding point and a second feeding point, When viewed in the negative direction of the Z axis, the second feeding point is not in a point-symmetric relationship with the first feeding point with respect to the center of gravity of a figure defined by an outer edge of the first radiation conductor layer, the second radiating conductor layer is provided on the laminate, and is located on the negative side of the Z axis relative to the first radiating conductor layer, and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path and the second signal path are connected to the first radiation conductor layer; the first connecting conductor is provided in the laminate, is connected to the first signal path and the second signal path at only one point, and is located on the negative side of the Z axis from the second radiation conductor layer; Multilayer board.

14. the wiring board includes a first laminate, a first signal path portion, a second signal path portion, and a first connecting conductor; an antenna component is mounted on the first laminate; the antenna component is located on the positive side of the Z axis relative to the first laminate, the antenna component includes a second laminate, a first radiating conductor layer, and a second radiating conductor layer; the first stacked body has a structure in which a plurality of insulating layers are stacked along the Z axis, the second stacked body has a structure in which a plurality of insulating layers are stacked along the Z axis, the first radiation conductor layer is provided on the second laminate, and receives or radiates a first high-frequency signal and receives or radiates a second high-frequency signal; a vibration direction of an electromagnetic field caused by the second high-frequency signal propagating through the air is different from a vibration direction of an electromagnetic field caused by the first high-frequency signal propagating through the air; the second radiating conductor layer is provided on the second stacked body, and is located on the negative side of the Z axis relative to the first radiating conductor layer, and overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis; the first signal path portion and the second signal path portion are provided in the first laminate and are electrically connected to the first radiation conductor layer; the first high-frequency signal is transmitted through the first signal path portion, the second high-frequency signal is transmitted through the second signal path portion, the first connecting conductor is provided in the second laminate, is connected to the first signal path portion and the second signal path portion, and is located on the negative side of the Z axis with respect to the second radiation conductor layer; Wiring board.

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