Antenna parts

Abstract

A radiating member (17) is positioned on the negative side in the Z-axis of a first radiating conductor layer (16), and is connected to the first radiating conductor layer (16). A first ground conductor layer (28) overlaps the first radiating conductor layer (16) and the radiating member (17) as viewed in the negative direction in the Z-axis, and is positioned on the negative side in the Z-axis of the first radiating conductor layer (16). When a region that overlaps the first radiating conductor layer (16) as viewed in the negative direction of the Z-axis and that is positioned on the positive side in the Z-axis of a negative-side end and on the negative side in the Z-axis of the first radiating conductor layer (16) is defined as a first region, and a region that overlaps the first radiating conductor layer (16) as viewed in the negative direction of the Z-axis and that is positioned on the positive side in the Z-axis of the first ground conductor layer (28) and on the negative side in the Z-axis of the negative-side end is defined as a second region, the first region has a compound dielectric constant higher than a compound dielectric constant of the second region. Such configuration makes it possible to achieve both miniaturization of an antenna component (10) and broadening of the antenna band.

Description

[Technical Field]

[0001] The present invention relates to an antenna component. [Background technology]

[0002] As an example of a conventional invention relating to an antenna component, the antenna component described in Patent Document 1 is known. The antenna component includes a plurality of dielectric layers, a first electrode, and a first ground electrode. The plurality of dielectric layers are stacked. The first electrode and the first ground electrode are stacked together with the plurality of dielectric layers. The first electrode and the first ground electrode face each other with the dielectric layer interposed therebetween, thereby forming a patch antenna. Furthermore, a filler is provided in the dielectric layer located between the first electrode and the second electrode. The dielectric constant of the filler is lower than the dielectric constant of the dielectric layer. This reduces the effective dielectric constant within the dielectric. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2022 / 038925 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the field of antenna components described in Patent Document 1, there is a demand for both miniaturization of antenna components and broadening of the antenna bandwidth.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to achieve both miniaturization of antenna components and broadband operation of the antenna. [Means for solving the problem]

[0006] An antenna component according to one embodiment of the present invention comprises: The antenna component includes a main body, a first radiation conductor layer, a radiation member, and a first ground conductor layer; The main body has a structure in which a plurality of insulating layers are arranged along the Z axis, the first radiating conductor layer is provided on the main body, the radiating member is provided on the main body, is located on the negative side of the Z axis from the first radiating conductor layer, is connected to the first radiating conductor layer, and is not connected to a ground potential; the first ground conductor layer is provided on the main body, overlaps the first radiation conductor layer and the radiating member when viewed in the negative direction of the Z axis, and is located on the negative side of the Z axis with respect to the first radiation conductor layer; The negative end of the radiation member on the Z axis is defined as a negative end, a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the negative end and on the negative side of the first radiation conductor layer along the Z axis, is defined as a first region; and a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the first ground conductor layer and on the negative side of the Z axis from the negative end is defined as a second region; The complex dielectric constant of the first region is higher than the complex dielectric constant of the second region. [Effects of the Invention]

[0007] According to the antenna component of the present invention, it is possible to achieve both miniaturization of the antenna component and broadband of the antenna. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is an exploded perspective view of an antenna component 10. FIG. [Figure 2] FIG. 2 is a cross-sectional view of the antenna component 10 taken along line AA. [Figure 3] FIG. 3 is a rear view of the antenna component 10 in use. [Figure 4] FIG. 4 is a cross-sectional view of the antenna component 10a. [Figure 5] FIG. 5 is a top view of the antenna component 10b. [Figure 6]FIG. 6 is a cross-sectional view of the antenna component 10c. [Figure 7] FIG. 7 is a cross-sectional view of the antenna component 10d. [Figure 8] FIG. 8 is a cross-sectional view of the antenna component 10e. [Figure 9] FIG. 9 is a cross-sectional view of the antenna component 10f. [Figure 10] FIG. 10 is a cross-sectional view of the antenna component 10g. [Figure 11] FIG. 11 is a top view of the antenna component 10h. DETAILED DESCRIPTION OF THE INVENTION

[0009] (Embodiment) [Structure of antenna component 10] The structure of an antenna component 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 antenna component 10. Fig. 2 is a cross-sectional view of the antenna component 10 taken along line AA. Fig. 3 is a rear view of the antenna component 10 in use.

[0010] In the following, the stacking direction of the main body 12 is parallel to the vertical axis. The vertical axis coincides with the Z axis. The upward direction is the positive direction of the Z axis. The downward direction is the negative direction of the Z axis. When looking at the main body 12 downward, two sides of the main body 12 extend along the horizontal axis. When looking at the main body 12 downward, the remaining two sides of the main body 12 extend along the front-rear axis. The horizontal axis is perpendicular to the vertical axis. The front-rear axis is perpendicular to the vertical axis and the horizontal 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 antenna component 10 is actually used.

[0011] The antenna component 10 is used in, for example, a wireless communication terminal such as a smartphone. As shown in Fig. 1, the antenna component 10 includes a main body 12, a first radiation conductor layer 16, a radiating member 17, a first ground conductor layer 28, a second ground conductor layer 30, a fourth ground conductor layer 31, a third ground conductor layer 32, a current path R, a plurality of interlayer connection conductors v2, and a plurality of interlayer connection conductors v5.

[0012] The main body 12 has a plate shape. As shown in FIG. 1, the main body 12 has a rectangular shape when viewed from below. The main body 12 has a structure in which first insulator layers 14a, 14b, second insulator layers 14c to 14e, and insulator layers 15a, 15b (multiple insulator layers) are stacked along a vertical axis (Z-axis). The insulator layer 15a, the first insulator layers 14a, 14b, the second insulator layers 14c to 14e, and the insulator layer 15b are arranged in this order from top to bottom. The first insulator layers 14a, 14b have a rectangular shape when viewed from below. The second insulator layers 14c to 14e have a strip shape extending in the left-right direction when viewed from below. The first insulator layers 14a, 14b overlap the left ends of the second insulator layers 14c to 14e when viewed from below.

[0013] The dielectric constant of the first insulator layers 14a, 14b is higher than that of the second insulator layers 14c to 14e. The first insulator layers 14a, 14b are made of a thermoplastic resin such as polyimide. The second insulator layers 14c to 14e are made of a thermoplastic resin such as liquid crystal polymer. Adjacent first insulator layers 14a, 14b and second insulator layers 14c to 14e are fused together. The main body 12 is flexible. The insulator layers 15a, 15b will be described later.

[0014] The first radiating conductor layer 16 and the radiating member 17 radiate and / or receive high-frequency signals. The first radiating conductor layer 16 is provided on the main body 12. In this embodiment, the first radiating conductor layer 16 is located on the upper main surface of the first insulator layer 14a. As shown in FIG. 1, the first radiating conductor layer 16 has a rectangular shape when viewed from below. As shown in FIG. 1, the first radiating conductor layer 16 has two sides extending along the front-to-back axis and two sides extending along the left-to-right axis when viewed from below. The left and right sides of the first radiating conductor layer 16 are longer than the front and rear sides.

[0015] The radiating member 17 is provided on the main body 12. The radiating member 17 is located below (on the negative side of the Z axis) the first radiating conductor layer 16. More specifically, the radiating member 17 includes an interlayer connection conductor v21 and a second radiating conductor layer 18.

[0016] The second radiation conductor layer 18 is provided on the main body 12. In the embodiment, the second radiation conductor layer 18 is located on the lower main surface of the first insulating layer 14b. As a result, the second radiation conductor layer 18 is located below the first radiation conductor layer 16 (on the negative side of the Z axis). As shown in FIG. 1, the second radiation conductor layer 18 has a rectangular shape when viewed downward. As shown in FIG. 1, the second radiation conductor layer 18 has two sides extending along the front-to-back axis and two sides extending along the left-to-right axis when viewed downward. The left and right sides of the second radiation conductor layer 18 are longer than the front and rear sides. Furthermore, as viewed downward, the left side of the second radiation conductor layer 18 overlaps with the left side of the first radiation conductor layer 16. As a result, at least a portion of the second radiation conductor layer 18 overlaps with the first radiation conductor layer 16 when viewed downward (in the negative direction of the Z axis). In this embodiment, the entire second radiating conductor layer 18 overlaps with the first radiating conductor layer 16 when viewed downward (negative direction of the Z axis).

[0017] However, when viewed in the downward direction (negative direction of the Z axis), the area of ​​the second radiation conductor layer 18 is smaller than the area of ​​the first radiation conductor layer 16. Therefore, when viewed in the downward direction, the second radiation conductor layer 18 overlaps only the vicinity of the left side of the first radiation conductor layer 16. The length of the second radiation conductor layer 18 in the front-to-rear direction is equal to the length of the first radiation conductor layer 16 in the front-to-rear direction.

[0018] In this embodiment, the second radiating conductor layer 18 does not protrude from the first radiating conductor layer 16 when viewed downward.

[0019] The interlayer connection conductor v21 is provided on the main body 12. The interlayer connection conductor v21 penetrates the first insulator layers 14a, 14b (one or more of the multiple insulator layers) along the up-down axis (Z-axis). The interlayer connection conductor v21 connects the first radiation conductor layer 16 and the second radiation conductor layer 18. Therefore, the upper end (the end on the positive side of the Z-axis) of the interlayer connection conductor v21 contacts the first radiation conductor layer 16. The lower end (the end on the negative side of the Z-axis) of the interlayer connection conductor v21 contacts the second radiation conductor layer 18. As a result, the radiating member 17 is connected to the first radiation conductor layer 16. However, the radiating member 17 is not connected to ground potential.

[0020] As shown in FIG. 1, the first ground conductor layer 28 is provided on the main body 12. More specifically, the first ground conductor layer 28 is located below the first radiation conductor layer 16 (on the negative side of the Z axis). The first ground conductor layer 28 is located on the lower main surface of the second insulator layer 14e. As shown in FIG. 1, the first ground conductor layer 28 has a rectangular shape when viewed from below. The first ground conductor layer 28 covers substantially the entire lower main surface of the second insulator layer 14e. As a result, the first ground conductor layer 28 overlaps with the first radiation conductor layer 16 when viewed from below (in the negative direction of the Z axis). The first ground conductor layer 28 is connected to the ground potential. As a result, the first radiation conductor layer 16, the radiating member 17, and the first ground conductor layer 28 form a patch antenna.

[0021] In the first radiation conductor layer 16 and the radiating member 17 as described above, resonance of the electromagnetic field occurs. The direction in which the electric field resonates in the first radiation conductor layer 16 is defined as the resonance direction. The resonance direction is the left-right direction. The direction perpendicular to the resonance direction when viewed downward (negative direction of the Z axis) is defined as the orthogonal direction. The orthogonal direction is the front-rear direction. The length of the first radiation conductor layer 16 in the orthogonal direction is longer than the length of the first radiation conductor layer 16 in the resonance direction. Therefore, in the first radiation conductor layer 16, the left and right sides are longer than the front and rear sides. Furthermore, the length of the second radiation conductor layer 18 in the orthogonal direction is equal to the length of the first radiation conductor layer 16 in the orthogonal direction.

[0022] 1, the second ground conductor layer 30 is provided on the main body 12. More specifically, the second ground conductor layer 30 is located on the upper main surface of the first insulating layer 14a. As a result, the second ground conductor layer 30 is located above the first ground conductor layer 28 (on the positive side of the Z axis).

[0023] Furthermore, when viewed in the downward direction (negative direction of the Z axis), the second ground conductor layer 30 has a ring shape surrounding the first radiation conductor layer 16. The outer and inner edges of the second ground conductor layer 30 have a rectangular shape with two sides extending along the front-rear axis and two sides extending along the left-right axis. As a result, the second ground conductor layer 30 does not overlap with the first radiation conductor layer 16 when viewed in the downward direction (negative direction of the Z axis). The second ground conductor layer 30 is connected to the ground potential.

[0024] 1, the fourth ground conductor layer 31 is provided on the main body 12. More specifically, the fourth ground conductor layer 31 is located on the lower main surface of the first insulating layer 14b. As a result, the fourth ground conductor layer 31 is located above the first ground conductor layer 28 (on the positive side of the Z axis).

[0025] When viewed from below (the negative direction of the Z axis), the fourth ground conductor layer 31 has a ring shape surrounding the first radiation conductor layer 16. The outer and inner edges of the fourth ground conductor layer 31 have a rectangular shape with two sides extending along the front-rear axis and two sides extending along the left-right axis. As a result, the fourth ground conductor layer 31 does not overlap the first radiation conductor layer 16 when viewed from below. The fourth ground conductor layer 31 is connected to the ground potential.

[0026] A high-frequency signal is transmitted through the current path R. The current path R is connected to the first radiation conductor layer 16. The current path R includes an interlayer connection conductor v1 and a signal conductor layer 20. The signal conductor layer 20 is provided on the main body 12. In this embodiment, the signal conductor layer 20 is located on the upper main surface of the second insulator layer 14d. The signal conductor layer 20 has a linear shape extending in the left-right direction. The left end of the signal conductor layer 20 overlaps with the first radiation conductor layer 16 when viewed downward.

[0027] The interlayer connection conductor v1 is provided on the main body 12. The interlayer connection conductor v1 penetrates the first insulator layers 14a, 14b and the second insulator layer 14c along the up-down axis. The interlayer connection conductor v1 connects the first radiation conductor layer 16 and the signal conductor layer 20. Therefore, the upper end of the interlayer connection conductor v1 is in contact with the first radiation conductor layer 16. The position where the interlayer connection conductor v1 is in contact with the first radiation conductor layer 16 is the feeding point P. The lower end of the interlayer connection conductor v1 is in contact with the left end of the signal conductor layer 20.

[0028] As shown in FIG. 1 , the third ground conductor layer 32 is provided on the main body 12. More specifically, the third ground conductor layer 32 is located below the first radiation conductor layer 16 and above the signal conductor layer 20. The third ground conductor layer 32 is located on the upper main surface of the second insulator layer 14c. As shown in FIG. 1 , the third ground conductor layer 32 has a rectangular shape when viewed from below. When viewed from below (the negative direction of the Z axis), the third ground conductor layer 32 overlaps with the signal conductor layer 20. However, when viewed from below, the third ground conductor layer 32 does not overlap with the first radiation conductor layer 16. The third ground conductor layer 32 is connected to a ground potential. As a result, the signal conductor layer 20, the first ground conductor layer 28, and the third ground conductor layer 32 form a stripline structure.

[0029] The insulator layer 15a covers the upper main surface of the first insulator layer 14a, the first radiation conductor layer 16, and the second ground conductor layer 30. The insulator layer 15b covers the lower main surface of the second insulator layer 14e and the first ground conductor layer 28. The insulator layers 15a and 15b are protective layers. The insulator layers 15a and 15b are solder resists. The solder resist material is, for example, epoxy resin or special acrylate.

[0030] Here, the lower end (the end on the negative side of the Z axis) of the radiating member 17 is defined as the negative end t. In this embodiment, the negative end t is the lower main surface of the second radiating conductor layer 18. A region that overlaps with the first radiating conductor layer 16 when viewed downward (in the negative direction of the Z axis), and is located above the negative end t (on the positive side of the Z axis) and below the first radiating conductor layer 16 (on the negative side of the Z axis), is defined as a first region A1. A region that overlaps with the first radiating conductor layer 16 when viewed downward (in the negative direction of the Z axis), and is located above the first ground conductor layer 28 (on the positive side of the Z axis) and below the negative end t (on the negative side of the Z axis), is defined as a second region A2. In this case, the first insulating layers 14a and 14b are located in the first region A1. The second insulating layers 14c to 14e are located in the second region A2. As a result, the complex dielectric constant of the first region A1 is higher than the complex dielectric constant of the second region A2.

[0031] A method for calculating the complex dielectric constant will now be described. Take the case where the first material through the nth material exist in the first region A1 as an example. n is a natural number. The dielectric constants of the first material through the nth material are denoted as ε1 through εn. The thicknesses of the first material through the nth material in the first region A1 on the vertical axis are denoted as d1 through dn. In this case, the complex dielectric constant ε0 is expressed by the following formula (1). ε0=(d1+d2+···+dn) / (d1 / ε1+d2 / ε2+···+dn / εn)···(1) The plurality of interlayer connection conductors v2 are provided on the main body 12. The plurality of interlayer connection conductors v2 electrically connect the first ground conductor layer 28 and the second ground conductor layer 30. More specifically, the plurality of interlayer connection conductors v2 penetrate the first insulating layers 14a, 14b and the second insulating layers 14c to 14e along the up-down axis. The upper ends of the plurality of interlayer connection conductors v2 are in contact with the second ground conductor layer 30. The lower ends of the plurality of interlayer connection conductors v2 are in contact with the first ground conductor layer 28.

[0032] The plurality of interlayer connection conductors v5 are provided on the main body 12. The plurality of interlayer connection conductors v5 are connected to the first ground conductor layer 28 and the 3 Ground conductor layer 32 More specifically, the plurality of interlayer connection conductors v5 penetrate the second insulating layers 14c to 14e along the vertical axis. 3 Ground conductor layer 32 The lower ends of the interlayer connection conductors v5 are in contact with the first ground conductor layer 28.

[0033] The first radiation conductor layer 16 as described above, No. 2 radiation Conductor layer 18The signal conductor layer 20, the first ground conductor layer 28, the second ground conductor layer 30, the fourth ground conductor layer 31, and the third ground conductor layer 32 are formed by patterning metal foil attached to the upper or lower main surface of the first insulator layers 14a, 14b or the second insulator layers 14c to 14e. The metal foil is, for example, copper foil. The interlayer connection conductors v1, v2, v5, and v21 are formed by filling through holes that penetrate the first insulator layers 14a, 14b or the second insulator layers 14c to 14e along the vertical axis with a conductive paste and solidifying the conductive paste by applying heat and pressure. The interlayer connection conductors v1, v2, v5, and v21 may also be formed by plating the through holes.

[0034] Next, a method of using the antenna component 10 will be described. As shown in FIGS. 1 to 3, the antenna component 10 has a first section A11 and a second section A12. The first section A11 is a section that overlaps with the first insulator layers 14a and 14b when viewed from below. The second section A12 is a section that does not overlap with the first insulator layers 14a and 14b when viewed from below. The vertical thickness of the antenna component 10 in the second section A12 is smaller than the vertical thickness of the antenna component 10 in the first section A11. Therefore, the second section A12 is more easily deformed than the first section A11. Therefore, as shown in FIG. 3, the second section A12 is bent downward or upward.

[0035] [effect] This allows both miniaturization of the antenna component 10 and broadening of the antenna bandwidth. More specifically, the radiating member 17 is connected to the first radiating conductor layer 16. As a result, the first radiating conductor layer 16 and the radiating member 17 form a patch antenna. The half wavelength of the high-frequency signal is equal to the sum of the left-right length of the first radiating conductor layer 16, the top-bottom length of the interlayer connection conductor v21, and the length from the interlayer connection conductor v21 to the right end of the second radiating conductor layer 18. Therefore, the left-right length of the first radiating conductor layer 16 may be short. This allows the antenna component 10 to be miniaturized when viewed from below.

[0036] Incidentally, a large capacitance is likely to be formed between the radiating member 17 and the first ground conductor layer 28. When a large capacitance is formed between the radiating member 17 and the first ground conductor layer 28, the Q value of a resonant antenna such as a patch antenna increases. As a result, the antenna is likely to have a narrow bandwidth.

[0037] Therefore, in the antenna component 10, the complex dielectric constant of the first region A1 is higher than that of the second region A2. That is, the complex dielectric constant of the second region A2 is lower than that of the first region A1. As a result, a large capacitance is unlikely to be formed between the radiating member 17 and the first ground conductor layer 28. This reduces the Q value of the antenna, thereby broadening the bandwidth of the antenna. Furthermore, a lower Q value of the antenna improves the radiation efficiency of the antenna.

[0038] In the antenna component 10, the complex dielectric constant of the first region A1 is higher than the complex dielectric constant of the second region A2. This makes it easier for the wavelength shortening effect to occur in the first radiating conductor layer 16. As a result, the first radiating conductor layer 16 can be made smaller. Therefore, the antenna component 10 can be made smaller when viewed from below.

[0039] In the antenna component 10, when viewed from below, the area of ​​the overlapping region of the second radiation conductor layer 18 that overlaps with the first radiation conductor layer 16 is larger than the area of ​​the non-overlapping region of the second radiation conductor layer 18 that does not overlap with the first radiation conductor layer 16. This reduces the amount of the second radiation conductor layer 18 that protrudes from the first radiation conductor layer 16 when viewed from below. As a result, the antenna component 10 can be made smaller when viewed from below.

[0040] The resonance direction of the second radiation conductor layer 18 of the antenna component 10 is the left-right direction. Therefore, current flows leftward or rightward. The length of the second radiation conductor layer 18 in the orthogonal direction is equal to the length of the first radiation conductor layer 16 in the orthogonal direction. This increases the length of the second radiation conductor layer 18 in the front-rear direction, thereby reducing the resistance of the second radiation conductor layer 18. As a result, the radiation efficiency of the antenna is improved.

[0041] The resonance direction of the first radiation conductor layer 16 of the antenna component 10 is the left-right direction. Therefore, current flows leftward or rightward. Therefore, the length of the first radiation conductor layer 16 in the orthogonal direction is longer than the length of the first radiation conductor layer 16 in the resonance direction. Therefore, the length of the first radiation conductor layer 16 in the front-rear direction is increased, and the resistance of the first radiation conductor layer 16 is reduced. As a result, the radiation efficiency of the antenna is improved.

[0042] In the antenna component 10, the vertical thickness of the second section A12 is smaller than the vertical thickness of the antenna component 10 in the first section A11. Therefore, the second section A12 is more easily deformed than the first section A11. Therefore, the second section A12 can be bent downward or upward.

[0043] In the antenna component 10, the second ground conductor layer 30 has a ring shape surrounding the first radiation conductor layer 16 when viewed from below. This makes it difficult for electromagnetic waves radiated from the first radiation conductor layer 16 to reach components around the antenna component 10. Also, it makes it difficult for electromagnetic waves radiated from components around the antenna component 10 to reach the first radiation conductor layer 16. Furthermore, the directivity of the antenna is improved.

[0044] (First Modification) An antenna component 10a according to a first modified example will be described below with reference to the drawings. Fig. 4 is a cross-sectional view of the antenna component 10a.

[0045] The antenna component 10a differs from the antenna component 10 in that the main body 12 includes a first main body portion 12a and a second main body portion 12b. More specifically, the first main body portion 12a includes first insulator layers 14a, 14b and insulator layers 15a, 15c. The insulator layer 15c covers the lower main surface of the first insulator layer 14b. The second main body portion 12b includes second insulator layers 14c to 14e and insulator layers 15b, 15d. The insulator layer 15d covers the upper main surface of the second insulator layer 14c.

[0046] The antenna component 10a further includes mounting electrodes 40a to 40d and solders 42a and 42b. The mounting electrodes 40a and 40c are located on the lower main surface of the first insulator layer 14b. The mounting electrode 40a is in contact with the lower end of the upper part of the interlayer connection conductor v2. 40c is an interlayer connection conductor v1 of above Department under It touches the edge.

[0047] The mounting electrodes 40b and 40d are located on the upper main surface of the second insulating layer 14c. v2 of under Department above The mounting electrode 40d is in contact with the upper end of the lower part of the interlayer connection conductor v1.

[0048] The solder 42a is a conductive bonding material that connects the mounting electrode 40a and the mounting electrode 40b, and the solder 42b is a conductive bonding material that connects the mounting electrode 40c and the mounting electrode 40d.

[0049] Here, the second region A2 contains the insulating layers 15c and 15d, air, and the second insulating layers 14c to 14d. 14e Therefore, the complex dielectric constant of the second region A2 is the dielectric constant of the insulating layers 15c and 15d, the dielectric constant of the air, and the dielectric constant of the second insulating layers 14c to 14d. 14e the dielectric constant of the insulating layer 15c, the volume of the insulating layer 15d, the volume of air, and the volume of the second insulating layer 14c 14e The other structure of the antenna component 10a is the same as that of the antenna component 10, so a description thereof will be omitted. The antenna component 10a can achieve the same effects as the antenna component 10.

[0050] (Second Modification) An antenna component 10b according to a second modified example will be described below with reference to the drawings. Fig. 5 is a top view of the antenna component 10b.

[0051] The antenna component 10b differs from the antenna component 10 in that it further includes branch conductors 22a and 22b. The branch conductors 22a and 22b branch from the current path R. More specifically, the branch conductor 22a branches forward from the signal conductor layer 20. The branch conductor 22b branches backward from the signal conductor layer 20. Therefore, the signal conductor layer 20 and the branch conductors 22a and 22b are included in a single conductor layer. The branch conductors 22a and 22b are located on the lower main surface of the second insulator layer 14c. As a result, the branch conductors 22a and 22b are located in the second region A2. Furthermore, the branch conductors 22a and 22b overlap the first radiating conductor layer 16 when viewed downward (in the negative direction of the Z axis). The branch conductors 22a and 22b are located within a range of half the wavelength of the high-frequency signal or less from the first radiating conductor layer 16. Such branch conductors 22a and 22b are open stubs. Therefore, the branch conductors 22a and 22b are not connected to any conductor layer other than the signal conductor layer 20. The other structures of the antenna component 10b are the same as those of the antenna component 10, and therefore, a description thereof will be omitted. The antenna component 10b can achieve the same effects as the antenna component 10.

[0052] Moreover, the branch conductors 22a and 22b branch off from the current path R. As a result, the branch conductors 22a and 22b play a role in matching the characteristic impedance of the first radiation conductor layer 16 with the characteristic impedance of the current path R. As a result, reflection of high-frequency signals at the boundary between the first radiation conductor layer 16 and the current path R is suppressed, and loss of high-frequency signals is reduced.

[0053] It is preferable that the branch conductors 22a and 22b are not far from the first radiation conductor layer 16 for the following reasons. Reflection of the high-frequency signal occurs at the feeding point P. The reflected high-frequency signal is reflected again by the branch conductors 22a and 22b. The reflected wave is radiated as an electromagnetic wave from the first radiation conductor layer 16. In this way, in the antenna component 10b, the reflected wave is used as an electromagnetic wave of the high-frequency signal.

[0054] Here, if the branch conductors 22a, 22b are far away from the first radiating conductor layer 16, loss occurs in the reflected wave between the branch conductors 22a, 22b and the first radiating conductor layer 16. Therefore, it is preferable that the branch conductors 22a, 22b are not far away from the first radiating conductor layer 16. In the antenna component 10b, the branch conductors 22a, 22b are located within a range of half the wavelength of the high-frequency signal from the first radiating conductor layer 16, so that the influence of the reflected wave due to impedance matching can be reduced, and loss can be reduced.

[0055] (Third Modification) An antenna component 10c according to a third modified example will be described below with reference to the drawings. Fig. 6 is a cross-sectional view of the antenna component 10c.

[0056] The antenna component 10c differs from the antenna component 10 in that it further includes a radiating member 117. The structure of the radiating member 117 is such that the radiating member 17 and left and right Since the relationship is symmetrical, a description thereof will be omitted. The other structure of the antenna component 10c is the same as that of the antenna component 10, and a description thereof will be omitted. The antenna component 10c can achieve the same effects as the antenna component 10.

[0057] The antenna component 10c further includes a radiating member 117. As a result, the first radiating conductor layer 16 and the radiating members 17, 117 form a patch antenna. The half wavelength of the high-frequency signal is equal to the sum of the left-right length of the first radiating conductor layer 16, the up-down length of the interlayer connection conductor v21, the length from the interlayer connection conductor v21 to the right end of the second radiating conductor layer 18, the up-down length of the interlayer connection conductor v121, and the length from the interlayer connection conductor v121 to the left end of the second radiating conductor layer 118. This reduces the size of the antenna component 10c when viewed from below. Furthermore, the symmetry of the radiation characteristics of the antenna component 10c is improved.

[0058] (Fourth Modification) An antenna component 10d according to a fourth modification will be described below with reference to the drawings. Fig. 7 is a cross-sectional view of the antenna component 10d.

[0059] The antenna component 10d differs from the antenna component 10 in that the second radiation conductor layer 18 is located on the lower main surface of the second insulator layer 14c. The other structures of the antenna component 10d are the same as those of the antenna component 10, and therefore a description thereof will be omitted. The antenna component 10d can achieve the same effects as the antenna component 10.

[0060] (Fifth Modification) An antenna component 10e according to a fifth modified example will be described below with reference to the drawings. Fig. 8 is a cross-sectional view of the antenna component 10e.

[0061] The antenna component 10e differs from the antenna component 10d in that the main body 12 includes a first main body portion 12a and a second main body portion 12b. The second radiation conductor layer 18 is provided on the second main body portion 12b. The other structures of the antenna component 10e are the same as those of the antenna component 10d, and therefore, a description thereof will be omitted. The antenna component 10e can achieve the same effects as the antenna component 10d.

[0062] (Sixth Modification) An antenna component 10f according to a sixth modified example will be described below with reference to the drawings. Fig. 9 is a cross-sectional view of the antenna component 10f.

[0063] The antenna component 10f differs in that the upper end of the interlayer connection conductor v1 is not in contact with the first radiation conductor layer 16. The antenna component 10f further includes a feeding conductor layer 34. The feeding conductor layer 34 is located on the lower main surface of the first insulator layer 14b. The feeding conductor layer 34 also overlaps with the first radiation conductor layer 16 when viewed from below. This creates capacitance between the first radiation conductor layer 16 and the feeding conductor layer 34. The upper end of the interlayer connection conductor v1 is in contact with the feeding conductor layer 34.

[0064] In the antenna component 10f described above, a high-frequency signal is transmitted between the first radiation conductor layer 16 and the power supply conductor layer 34 via a capacitance between the first radiation conductor layer 16 and the power supply conductor layer 34. The other structures of the antenna component 10f are the same as those of the antenna component 10, and therefore a description thereof will be omitted. The antenna component 10f can achieve the same effects as the antenna component 10.

[0065] (Seventh Modification) An antenna component 10g according to a seventh modified example will be described below with reference to the drawings. Fig. 10 is a cross-sectional view of the antenna component 10g.

[0066] The antenna component 10g differs from the antenna component 10 in that it further includes an interlayer connection conductor v25. The interlayer connection conductor v25 connects the first radiation conductor layer 16 and the first ground conductor layer 28. As a result, the first radiation conductor layer 16, the radiating member 17, the first ground conductor layer 28, and the interlayer connection conductor v25 form an inverted-F antenna. This allows the antenna length to be a quarter wavelength, thereby reducing the size of the antenna component 10g. The other structure of the antenna component 10g is the same as that of the antenna component 10, so a description thereof will be omitted. The antenna component 10g can achieve the same effects as the antenna component 10.

[0067] (Eighth Modification) An antenna component 10h according to an eighth modification will be described below with reference to the drawings. Fig. 11 is a top view of the antenna component 10h.

[0068] The antenna component 10h differs from the antenna component 10 in that the first radiation conductor layer 16 is connected to the second ground conductor layer 30. As a result, the first radiation conductor layer 16, the radiating member 17, the first ground conductor layer 28, and the second ground conductor layer 30 form an inverted-F antenna. The other structures of the antenna component 10h are the same as those of the antenna component 10, and therefore a description thereof will be omitted. The antenna component 10h can achieve the same effects as the antenna component 10.

[0069] (Other embodiments) The antenna components according to the present invention are not limited to the antenna components 10, 10a to 10h and can be modified within the scope of the invention. Furthermore, the structures of the antenna components 10, 10a to 10h may be combined in any manner.

[0070] The radiating member 17 may have a structure other than that shown in the figure. The radiating member 17 may further include an interlayer connection conductor and a second radiating conductor layer. In this case, the second radiating conductor layer is connected to the second radiating conductor layer 18 via the interlayer connection conductor. The second radiating conductor layer may be located below or above the second radiating conductor layer 18.

[0071] The second radiating conductor layer 18 is not an essential component, and therefore the radiating member 17 may include only the interlayer connection conductor v21.

[0072] The second ground conductor layer 30 is not an essential component.

[0073] The second radiating conductor layer 18 may protrude from the first radiating conductor layer 16. In this case, when viewed from below, the area of ​​the overlapping region of the second radiating conductor layer 18 that overlaps with the first radiating conductor layer 16 may be larger than the area of ​​the non-overlapping region of the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16, or may not be larger than the area of ​​the non-overlapping region of the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16.

[0074] The length of the second radiating conductor layer 18 in the orthogonal direction does not have to be equal to the length of the first radiating conductor layer 16 in the orthogonal direction.

[0075] The length of the first radiating conductor layer 16 in the orthogonal direction may be equal to or less than the length of the first radiating conductor layer 16 in the resonance direction.

[0076] The branch conductors 22a and 22b do not necessarily overlap with the first radiation conductor layer 16 when viewed from below.

[0077] The branch conductors 22a and 22b may be short stubs.

[0078] The branch conductors 22a and 22b may be located in the first region A1.

[0079] The first insulating layers 14a and 14b may be made of ceramic, and the second insulating layers 14c to 14e may be made of liquid crystal polymer or polyimide. Alternatively, the first insulating layers 14a and 14b may be made of liquid crystal polymer containing a filler, and the second insulating layers 14c to 14e may be made of liquid crystal polymer. In this case, the dielectric constant of the filler is lower than that of the liquid crystal polymer. Alternatively, the first insulating layers 14a and 14b may be made of polyimide containing a filler, and the second insulating layers 14c to 14e may be made of polyimide. In this case, the dielectric constant of the filler is lower than that of polyimide.

[0080] In the antenna component 10a, when the first insulator layers 14a and 14b are made of ceramic, the first body portion 12a is a non-flexible electronic component. On the other hand, the second body portion 12b is a flexible circuit board. In this case, the first section A11 is non-flexible, but the second section A12 is flexible.

[0081] The antenna components 10, 10a to 10h do not necessarily have the second section A12. In this case, an external electrode is provided on the lower main surface of the second insulating layer 14e. The lower end of the interlayer connection conductor v1 contacts the external electrode.

[0082] In the antenna component 10f, the feeding conductor layer 34 may be located above the second insulating layers 14c to 14e, thereby reducing the number of interlayer connection conductors in the antenna component 10f.

[0083] When viewed downward, the second radiating conductor layer 18 may protrude from the first radiating conductor layer 16. However, when viewed downward (negative direction of the Z axis), the area of ​​the overlapping region of the second radiating conductor layer 18 that overlaps with the first radiating conductor layer 16 is larger than the area of ​​the non-overlapping region of the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16.

[0084] The present invention has the following structure.

[0085] (1) The antenna component includes a main body, a first radiation conductor layer, a radiation member, and a first ground conductor layer; The main body has a structure in which a plurality of insulating layers are arranged along the Z axis, the first radiating conductor layer is provided on the main body, the radiating member is provided on the main body, is located on the negative side of the Z axis from the first radiating conductor layer, is connected to the first radiating conductor layer, and is not connected to a ground potential; the first ground conductor layer is provided on the main body, overlaps the first radiation conductor layer and the radiating member when viewed in the negative direction of the Z axis, and is located on the negative side of the Z axis with respect to the first radiation conductor layer; The negative end of the radiation member on the Z axis is defined as a negative end, a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the negative end and on the negative side of the first radiation conductor layer along the Z axis, is defined as a first region; and a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the first ground conductor layer and on the negative side of the Z axis from the negative end is defined as a second region; The complex dielectric constant of the first region is higher than the complex dielectric constant of the second region. Antenna parts.

[0086] (2) the radiating member includes an interlayer connection conductor and a second radiating conductor layer, the second radiating conductor layer is provided on the main body and is located on the negative side of the Z axis relative to the first radiating conductor layer; the interlayer connection conductor is provided in the main body, penetrates one or more of the plurality of insulator layers along the Z axis, and connects the first radiation conductor layer and the second radiation conductor layer; When viewed in the negative direction of the Z axis, the area of ​​the second radiating conductor layer is smaller than the area of ​​the first radiating conductor layer. The antenna component according to (1).

[0087] (3) At least a portion of the second radiating conductor layer overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis. (2) The antenna component described in (2).

[0088] (4) When viewed in the negative direction of the Z axis, an area of ​​an overlapping region in the second radiating conductor layer that overlaps with the first radiating conductor layer is larger than an area of ​​a non-overlapping region in the second radiating conductor layer that does not overlap with the first radiating conductor layer. (3) The antenna component described in (3).

[0089] (5) A direction in which an electric field resonates in the first radiation conductor layer is defined as a resonance direction, When viewed in the negative direction of the Z axis, a direction perpendicular to the resonance direction is defined as an orthogonal direction, the length of the second radiating conductor layer in the orthogonal direction is equal to the length of the first radiating conductor layer in the orthogonal direction; An antenna component according to any one of (2) to (4).

[0090] (6) A direction in which an electric field resonates in the first radiation conductor layer is defined as a resonance direction, When viewed in the negative direction of the Z axis, a direction perpendicular to the resonance direction is defined as an orthogonal direction, a length of the first radiating conductor layer in the orthogonal direction is longer than a length of the first radiating conductor layer in the resonance direction; An antenna component according to any one of (2) to (4).

[0091] (7) the antenna component further includes a second ground conductor layer, the second ground conductor layer is provided on the main body and has a ring shape surrounding the first radiation conductor layer when viewed in the negative direction of the Z axis. An antenna component according to any one of (1) to (6).

[0092] (8) The antenna component further includes a current path; the current path is connected to the first radiation conductor layer; A high-frequency signal is transmitted through the current path. An antenna component according to any one of (1) to (7).

[0093] (9) The antenna component further includes a branch conductor, The branch conductor branches off from the current path. (8) The antenna component according to (8).

[0094] (10) the branch conductor is located within a range of ½ or less of the wavelength of the high-frequency signal from the first radiation conductor layer; (9) The antenna component according to (9).

[0095] (11) the branch conductor is located in the second region; An antenna component according to (9) or (10).

[0096] (12) the plurality of insulator layers include a first insulator layer and a second insulator layer; the first insulating layer is located in the first region; the second insulating layer is located in the second region; The dielectric constant of the first insulating layer is higher than the dielectric constant of the second insulating layer. An antenna component according to any one of (1) to (11). [Explanation of symbols]

[0097] 10, 10a to 10h: Antenna parts 12:Main body 12a: First main body part 12b: Second main body part 14a, 14b: first insulating layer 14c to 14e: second insulating layer 15a to 15d: Insulator layers 16: First radiation conductor layer 17,117: Radiating member 18,118: Second radiation conductor layer 20: Signal conductor layer 22a, 22b: Branch conductors 28: First ground conductor layer 30: Second ground conductor layer 32: Third ground conductor layer 34: Power supply conductor layer 40a to 40d: Mounting electrodes 42a, 42b: solder A1:First area A11: First section A12: Second section A2:Second area P: Power supply point R: Current path t: Negative end

Claims

1. the antenna component includes a main body, a first radiation conductor layer, a radiation member, and a first ground conductor layer; the main body has a structure in which a plurality of insulating layers are arranged along the Z axis; the first radiating conductor layer is provided on the main body, the radiating member is provided on the main body, is located on the negative side of the Z axis from the first radiating conductor layer, is connected to the first radiating conductor layer, and is not connected to a ground potential; the first ground conductor layer is provided on the main body, overlaps the first radiation conductor layer and the radiating member when viewed in the negative direction of the Z axis, and is located on the negative side of the Z axis with respect to the first radiation conductor layer; The end of the radiation member on the negative side of the Z axis is defined as a negative end, a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the negative end and on the negative side of the first radiation conductor layer along the Z axis, is defined as a first region; and a region overlapping with the first radiation conductor layer when viewed in the negative direction of the Z axis, and located on the positive side of the Z axis from the first ground conductor layer and on the negative side of the Z axis from the negative end is defined as a second region; The complex dielectric constant of the first region is higher than the complex dielectric constant of the second region. Antenna parts.

2. the radiating member includes an interlayer connection conductor and a second radiating conductor layer, the second radiating conductor layer is provided on the main body and is located on the negative side of the Z axis relative to the first radiating conductor layer, the interlayer connection conductor is provided in the main body, penetrates one or more of the plurality of insulator layers along the Z-axis, and connects the first radiation conductor layer and the second radiation conductor layer; When viewed in the negative direction of the Z axis, the area of ​​the second radiating conductor layer is smaller than the area of ​​the first radiating conductor layer. The antenna component according to claim 1 .

3. At least a portion of the second radiating conductor layer overlaps with the first radiating conductor layer when viewed in the negative direction of the Z axis. The antenna component according to claim 2 .

4. When viewed in the negative direction of the Z axis, an area of ​​an overlapping region in the second radiating conductor layer that overlaps with the first radiating conductor layer is larger than an area of ​​a non-overlapping region in the second radiating conductor layer that does not overlap with the first radiating conductor layer. The antenna component according to claim 3 .

5. A direction in which an electric field resonates in the first radiation conductor layer is defined as a resonance direction, A direction perpendicular to the resonance direction when viewed in the negative direction of the Z axis is defined as an orthogonal direction, a length of the second radiating conductor layer in the orthogonal direction is equal to a length of the first radiating conductor layer in the orthogonal direction; The antenna component according to any one of claims 2 to 4.

6. A direction in which an electric field resonates in the first radiation conductor layer is defined as a resonance direction, A direction perpendicular to the resonance direction when viewed in the negative direction of the Z axis is defined as an orthogonal direction, a length of the first radiating conductor layer in the orthogonal direction is longer than a length of the first radiating conductor layer in the resonance direction; The antenna component according to any one of claims 2 to 4.

7. the antenna component further includes a second ground conductor layer, the second ground conductor layer is provided on the main body and has a ring shape surrounding the first radiation conductor layer when viewed in the negative direction of the Z axis. The antenna component according to any one of claims 1 to 4.

8. The antenna component further includes a current path; the current path is connected to the first radiation conductor layer; A high-frequency signal is transmitted through the current path. The antenna component according to any one of claims 1 to 4.

9. The antenna component further includes a branch conductor, The branch conductor branches off from the current path.

9. The antenna component according to claim 8.

10. the branch conductor is located within a range of ½ or less of the wavelength of the high-frequency signal from the first radiation conductor layer; 10. The antenna component according to claim 9.

11. the branch conductor is located in the second region; 10. The antenna component according to claim 9.

12. the plurality of insulator layers include a first insulator layer and a second insulator layer; the first insulating layer is located in the first region; the second insulating layer is located in the second region; The dielectric constant of the first insulator layer is higher than the dielectric constant of the second insulator layer. The antenna component according to any one of claims 1 to 4.

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