antenna component
By designing the difference between high and low dielectric constant regions in the antenna components, the electromagnetic field resonance and capacitance formation are optimized, solving the problems of miniaturization and broadbanding of the antenna components, and achieving higher radiation efficiency and directivity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- MURATA MFG CO LTD
- Filing Date
- 2024-01-18
- Publication Date
- 2026-06-02
AI Technical Summary
Existing antenna components are difficult to simultaneously meet the requirements of miniaturization and broadband.
By setting a first radiating conductor layer and a radiating component in the antenna component, and utilizing the difference in composite dielectric constant in different regions, a first region with a high dielectric constant and a second region with a low dielectric constant are designed to optimize electromagnetic field resonance and capacitance formation, thereby achieving miniaturization and broadband.
This technology enables the miniaturization and broadbanding of antenna components, while improving radiation efficiency and directivity, and reducing the loss of high-frequency signals.
Smart Images
Figure CN224318710U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to antenna components. Background Technology
[0002] As a utility model related to conventional antenna components, for example, the antenna component described in Patent Document 1 is known. The antenna component includes multiple dielectric layers, a first electrode, and a first ground electrode. The multiple dielectric layers are stacked. The first electrode and the first ground electrode are stacked together with the multiple dielectric layers. The first electrode and the first ground electrode face each other across the dielectric layers, 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 achieves a reduction in the effective dielectric constant within the dielectric.
[0003] Prior art literature
[0004] Patent documents
[0005] Patent Document 1: International Publication No. 2022 / 038925 Utility Model Content
[0006] Problems to be solved by utility models
[0007] However, in the field of antenna components described in Patent Document 1, there is a desire to achieve both miniaturization of antenna components and broadband antenna coverage.
[0008] Therefore, the purpose of this utility model is to balance the miniaturization of antenna components and the broadband of the antenna.
[0009] Technical solutions for solving the problem
[0010] The antenna component involved in one aspect of this utility model is,
[0011] The antenna component comprises a main body, a first radiating conductor layer, a radiating member, and a first grounding conductor layer.
[0012] The main body has a structure in which multiple insulating layers are arranged along the Z-axis.
[0013] The first radiative conductor layer is disposed on the main body.
[0014] The radiating member is disposed on the main body and located on the negative side of the Z-axis compared to the first radiating conductor layer. It is connected to the first radiating conductor layer but not connected to the ground potential.
[0015] The first grounding conductor layer is disposed on the main body, and when viewed along the negative direction of the Z-axis, it overlaps with the first radiating conductor layer and the radiating member, and is located on the negative side of the Z-axis than the first radiating conductor layer.
[0016] The negative end of the Z-axis of the radiating member is defined as the negative end.
[0017] The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the negative end and on the negative side of the Z-axis beyond the first radiating conductor layer, is defined as the first region. The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the first ground conductor layer and on the negative side of the Z-axis beyond the negative end, is defined as the second region.
[0018] The composite dielectric constant of the first region is higher than that of the second region.
[0019] Utility Model Effect
[0020] The antenna component involved in this utility model can achieve both miniaturization of the antenna component and broadband antenna coverage. Attached Figure Description
[0021] Figure 1 This is an exploded perspective view of antenna component 10.
[0022] Figure 2 This is a cross-sectional view of antenna component 10 at point AA.
[0023] Figure 3 This is a rear view of the antenna component 10 in use.
[0024] Figure 4 This is a cross-sectional view of antenna component 10a.
[0025] Figure 5 This is a top view of antenna component 10b.
[0026] Figure 6 This is a cross-sectional view of antenna component 10c.
[0027] Figure 7 This is a cross-sectional view of antenna component 10d.
[0028] Figure 8 This is a cross-sectional view of antenna component 10e.
[0029] Figure 9 This is a cross-sectional view of antenna component 10f.
[0030] Figure 10This is a cross-sectional view of antenna component 10g.
[0031] Figure 11 This is a top view of antenna component 10h. Detailed Implementation
[0032] (Implementation Method)
[0033] [Construction of Antenna Component 10]
[0034] Hereinafter, the structure of an antenna component 10 according to an embodiment of the present invention will be described with reference to the accompanying drawings. Figure 1 This is an exploded perspective view of antenna component 10. Figure 2 This is a cross-sectional view of antenna component 10 at point AA. Figure 3 This is a rear view of the antenna component 10 in use.
[0035] Hereinafter, the stacking direction of the main body 12 is parallel to the vertical axis. The vertical axis is consistent 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 observing the main body 12 in the downward direction, two sides of the main body 12 extend along the left-right axis. When observing the main body 12 in the downward direction, the remaining two sides of the main body 12 extend along the front-back axis. The left-right axis is orthogonal to the vertical axis. The front-back axis is orthogonal to both the vertical axis and the left-right axis. It should be noted that the definition of direction in this specification is an example. Therefore, the direction of the antenna component 10 in actual use does not need to be consistent with the direction in this specification.
[0036] Antenna component 10 is used, for example, in wireless communication terminals such as smartphones. Figure 1 As shown, the antenna component 10 includes a main body 12, a first radiating conductor layer 16, a radiating member 17, a first grounding conductor layer 28, a second grounding conductor layer 30, a fourth grounding conductor layer 31, a third grounding conductor layer 32, a current path R, multiple interlayer connecting conductors v2, and multiple interlayer connecting conductors v5.
[0037] The main body 12 has a plate shape. For example... Figure 1 As shown, the main body 12 has a rectangular shape when viewed from below. The main body 12 has a structure formed by stacking first insulating layers 14a and 14b, second insulating layers 14c-14e, and insulating layers 15a and 15b (multiple insulating layers) along a vertical axis (Z-axis). Insulating layers 15a, 14a, 14b, 14c-14e, and 15b are arranged sequentially from top to bottom. First insulating layers 14a and 14b have a rectangular shape when viewed from below. Second insulating layers 14c-14e have a strip shape extending in the left-right direction when viewed from below. First insulating layers 14a and 14b overlap with the left ends of second insulating layers 14c-14e when viewed from below.
[0038] The dielectric constants of the first insulating layers 14a and 14b are higher than those of the second insulating layers 14c to 14e. The first insulating layers 14a and 14b are, for example, thermoplastic resins such as polyimide. The second insulating layers 14c to 14e are, for example, thermoplastic resins such as liquid crystal polymers. The first insulating layers 14a and 14b, and the second insulating layers 14c to 14e are fused together in adjacent insulating layers. The main body 12 is flexible. Insulating layers 15a and 15b will be described next.
[0039] 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 disposed on the main body 12. In this embodiment, the first radiating conductor layer 16 is located on the upper main surface of the first insulating layer 14a. Figure 1 As shown, the first radiative conductor layer 16 has a rectangular shape when viewed from below. Figure 1 As shown, the first radiative conductor layer 16 has two sides extending along the front-rear axis and two sides extending along the left-right axis when viewed in the downward direction. In the first radiative conductor layer 16, the left and right sides are longer than the front and rear sides.
[0040] A radiating member 17 is disposed 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 connecting conductor v21 and a second radiating conductor layer 18.
[0041] A second radiating conductor layer 18 is disposed on the main body 12. In this embodiment, the second radiating conductor layer 18 is located on the lower main surface of the first insulating layer 14b. Therefore, the second radiating conductor layer 18 is located lower (on the negative side of the Z-axis) than the first radiating conductor layer 16. Figure 1 As shown, the second radiative conductor layer 18 has a rectangular shape when viewed from below. Figure 1 As shown, the second radiating conductor layer 18, when viewed in the downward direction, has two sides extending along the front-rear axis and two sides extending along the left-right axis. In the second radiating conductor layer 18, the left and right sides are longer than the front and rear sides. Moreover, when viewed in the downward direction, the left side of the second radiating conductor layer 18 overlaps with the left side of the first radiating conductor layer 16. As a result, at least a portion of the second radiating conductor layer 18 overlaps with the first radiating conductor layer 16 when viewed in the downward direction (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 in the downward direction (the negative direction of the Z-axis).
[0042] However, when viewed in the downward direction (the negative direction of the Z-axis), the area of the second radiating conductor layer 18 is smaller than the area of the first radiating conductor layer 16. Therefore, when viewed in the downward direction, the second radiating conductor layer 18 only overlaps with the left side of the first radiating conductor layer 16. Moreover, the length of the second radiating conductor layer 18 in the front-back direction is equal to the length of the first radiating conductor layer 16 in the front-back direction.
[0043] Furthermore, in this embodiment, when viewed in the downward direction, the second radiation conductor layer 18 does not protrude from the first radiation conductor layer 16.
[0044] An interlayer connecting conductor v21 is disposed on the main body 12. The interlayer connecting conductor v21 extends along the vertical axis (Z-axis) through the first insulating layers 14a and 14b (one or more of the multiple insulating layers). The interlayer connecting conductor v21 connects the first radiating conductor layer 16 to the second radiating conductor layer 18. Therefore, the upper end (the end on the positive side of the Z-axis) of the interlayer connecting conductor v21 contacts the first radiating conductor layer 16. The lower end (the end on the negative side of the Z-axis) of the interlayer connecting conductor v21 contacts the second radiating conductor layer 18. Thus, the radiating member 17 is connected to the first radiating conductor layer 16. However, the radiating member 17 is not connected to the ground potential.
[0045] like Figure 1 As shown, a first grounding conductor layer 28 is disposed on the main body 12. More specifically, the first grounding conductor layer 28 is located below the first radiating conductor layer 16 (on the negative side of the Z-axis). The first grounding conductor layer 28 is located on the lower main surface of the second insulating layer 14e. Figure 1 As shown, the first ground conductor layer 28 has a rectangular shape when viewed from below. The first ground conductor layer 28 covers approximately the entire lower main surface of the second insulating layer 14e. Thus, when viewed from below (the negative direction of the Z-axis), the first ground conductor layer 28 overlaps with the first radiating conductor layer 16. The first ground conductor layer 28 is connected to the ground potential. Thus, the first radiating conductor layer 16, the radiating member 17, and the first ground conductor layer 28 form a patch antenna.
[0046] Electromagnetic field resonance occurs in the first radiating conductor layer 16 and the radiating member 17 as described above. The direction in which the electric field resonates in the first radiating conductor layer 16 is defined as the resonance direction. The resonance direction is the left-right direction. The direction orthogonal to the resonance direction when viewed along the downward direction (the negative direction of the Z-axis) is defined as the orthogonal direction. The orthogonal direction is the front-back direction. The length of the first radiating conductor layer 16 in the orthogonal direction is longer than the length of the first radiating conductor layer 16 in the resonance direction. Therefore, in the first radiating conductor layer 16, the left and right sides are longer than the front and back sides. In addition, the length of the second radiating conductor layer 18 in the orthogonal direction is equal to the length of the first radiating conductor layer 16 in the orthogonal direction.
[0047] like Figure 1 As shown, the second grounding conductor layer 30 is disposed on the main body 12. More specifically, the second grounding conductor layer 30 is located on the upper main surface of the first insulating layer 14a. Thus, the second grounding conductor layer 30 is located above the first grounding conductor layer 28 (on the positive side of the Z-axis).
[0048] Furthermore, when viewed in the downward direction (negative Z-axis direction), the second grounding conductor layer 30 has a ring shape surrounding the first radiating conductor layer 16. The outer and inner edges of the second grounding conductor layer 30 have a rectangular shape including two sides extending along the front-rear axis and two sides extending along the left-right axis. Therefore, the second grounding conductor layer 30 does not overlap with the first radiating conductor layer 16 when viewed in the downward direction (negative Z-axis direction). The second grounding conductor layer 30 is connected to the ground potential.
[0049] like Figure 1 As shown, the fourth grounding conductor layer 31 is disposed on the main body 12. More specifically, the fourth grounding conductor layer 31 is located on the lower main surface of the first insulating layer 14b. Thus, the fourth grounding conductor layer 31 is located above the first grounding conductor layer 28 (on the positive side of the Z-axis).
[0050] Furthermore, when viewed in the downward direction (the negative direction of the Z-axis), the fourth grounding conductor layer 31 has a ring shape surrounding the first radiating conductor layer 16. The outer and inner edges of the fourth grounding conductor layer 31 have a rectangular shape including two sides extending along the front-rear axis and two sides extending along the left-right axis. Therefore, the fourth grounding conductor layer 31 does not overlap with the first radiating conductor layer 16 when viewed in the downward direction. The fourth grounding conductor layer 31 is connected to the ground potential.
[0051] A high-frequency signal is transmitted in the current path R. The current path R is connected to the first radiating conductor layer 16. The current path R includes an interlayer connecting conductor v1 and a signal conductor layer 20. The signal conductor layer 20 is disposed on the main body 12. In this embodiment, the signal conductor layer 20 is located on the upper main surface of the second insulating 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 radiating conductor layer 16 when viewed in the downward direction.
[0052] An interlayer connecting conductor v1 is disposed on the main body 12. The interlayer connecting conductor v1 passes through the first insulating layers 14a and 14b and the second insulating layer 14c along the vertical axis. The interlayer connecting conductor v1 connects the first radiating conductor layer 16 to the signal conductor layer 20. Therefore, the upper end of the interlayer connecting conductor v1 contacts the first radiating conductor layer 16. The position where the interlayer connecting conductor v1 contacts the first radiating conductor layer 16 is the power supply point P. The lower end of the interlayer connecting conductor v1 contacts the left end of the signal conductor layer 20.
[0053] like Figure 1 As shown, a third grounding conductor layer 32 is disposed on the main body 12. More specifically, the third grounding conductor layer 32 is located below the first radiating conductor layer 16 and above the signal conductor layer 20. The third grounding conductor layer 32 is located on the upper main surface of the second insulating layer 14c. Figure 1 As shown, 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 radiating conductor layer 16. The third ground conductor layer 32 is connected to the ground potential. Thus, the signal conductor layer 20, the first ground conductor layer 28, and the third ground conductor layer 32 form a stripline structure.
[0054] Insulating layer 15a covers the upper main surface of the first insulating layer 14a, the first radiating conductor layer 16, and the second grounding conductor layer 30. Insulating layer 15b covers the lower main surface of the second insulating layer 14e and the first grounding conductor layer 28. Insulating layers 15a and 15b are protective layers. Insulating layers 15a and 15b are solder resists. The solder resist material is, for example, epoxy resin or special acrylate.
[0055] 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. The region that overlaps with the first radiating conductor layer 16 when viewed in the downward direction (negative direction of the Z-axis) and is located above the negative end t (positive side of the Z-axis) and below the first radiating conductor layer 16 (negative side of the Z-axis) is defined as the first region A1. The region that overlaps with the first radiating conductor layer 16 when viewed in the downward direction (negative direction of the Z-axis) and is located above the first ground conductor layer 28 (positive side of the Z-axis) and below the negative end t (negative side of the Z-axis) is defined as the second region A2. At this time, 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 composite dielectric constant of the first region A1 is higher than that of the second region A2.
[0056] The method for calculating the composite dielectric constant is explained. An example is given where the first to nth substances exist in the first region A1. n is a natural number. The dielectric constants of the first to nth substances are set as ε1 to εn. The thicknesses of the upper and lower axes of the first to nth substances in the first region A1 are set as d1 to dn. In this case, the composite dielectric constant ε0 is given by the following equation (1).
[0057] ε0=(d1+d2+……+dn) / (d1 / ε1+d2 / ε2+……+dn / εn)……(1)
[0058] Multiple interlayer connecting conductors v2 are disposed on the main body 12. These conductors electrically connect the first grounding conductor layer 28 to the second grounding conductor layer 30. More specifically, the multiple interlayer connecting conductors v2 extend along the vertical axis through the first insulating layers 14a and 14b and the second insulating layers 14c to 14e. The upper ends of the multiple interlayer connecting conductors v2 contact the second grounding conductor layer 30. The lower ends of the multiple interlayer connecting conductors v2 contact the first grounding conductor layer 28.
[0059] Multiple interlayer connecting conductors v5 are disposed on the main body 12. These conductors electrically connect the first grounding conductor layer 28 to the third grounding conductor layer 32. More specifically, the multiple interlayer connecting conductors v5 extend through the second insulating layers 14c-14e along the vertical axis. The upper ends of the multiple interlayer connecting conductors v5 contact the third grounding conductor layer 32. The lower ends of the multiple interlayer connecting conductors v5 contact the first grounding conductor layer 28.
[0060] The first radiating conductor layer 16, the second radiating conductor layer 18, the 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, as described above, are formed by patterning a metal foil adhered to the upper or lower main surface of the first insulating layers 14a, 14b or the second insulating layers 14c-14e. The metal foil is, for example, copper foil. The interlayer connecting conductors v1, v2, v5, and v21 are formed by filling conductive paste into through-holes penetrating the first insulating layers 14a, 14b or the second insulating layers 14c-14e along the upper and lower axes, and then curing the conductive paste by heating and pressurizing. It should be noted that the interlayer connecting conductors v1, v2, v5, and v21 can also be formed by plating the through-holes.
[0061] Next, the usage of antenna component 10 will be explained. For example... Figures 1 to 3 As shown, the antenna component 10 has a first section A11 and a second section A12. The first section A11 is the section that overlaps with the first insulating layers 14a and 14b when viewed from below. The second section A12 is the section that does not overlap with the first insulating 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. Thus, as... Figure 3 As shown, the second interval A12 is bent downwards or upwards.
[0062] [Effect]
[0063] This design achieves both miniaturization of the antenna component 10 and broadband antenna performance. More specifically, the radiating member 17 is connected to the first radiating conductor layer 16. Thus, the first radiating conductor layer 16 and the radiating member 17 form a patch antenna. Furthermore, the half-wavelength of the high-frequency signal is equal to the sum of the left and right lengths of the first radiating conductor layer 16, the top and bottom lengths of the interlayer connecting conductor v21, and the length from the interlayer connecting conductor v21 to the right end of the second radiating conductor layer 18. Therefore, the left and right lengths of the first radiating conductor layer 16 can also be relatively short. This results in miniaturization of the antenna component 10 when viewed from below.
[0064] However, a large capacitance is easily 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 the resonant antenna, such as the patch antenna, becomes high. As a result, the antenna tends to be narrowband.
[0065] In response, in antenna component 10, the composite dielectric constant of the first region A1 is higher than that of the second region A2. That is, the composite dielectric constant of the second region A2 is lower than that of the first region A1. As a result, it is difficult to form a large capacitance between the radiating member 17 and the first ground conductor layer 28. Therefore, the Q value of the antenna decreases, achieving broadband antenna performance. Furthermore, when the Q value of the antenna decreases, the radiation efficiency of the antenna increases.
[0066] In antenna component 10, the composite dielectric constant of the first region A1 is higher than that of the second region A2. This facilitates a wavelength shortening effect in the first radiating conductor layer 16. As a result, miniaturization of the first radiating conductor layer 16 is achieved. Therefore, when viewed in the downward direction, miniaturization of antenna component 10 is realized.
[0067] In antenna component 10, when viewed in the downward direction, the area of the overlapping region in 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 in the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16. Therefore, when viewed in the downward direction, the amount by which the second radiating conductor layer 18 protrudes from the first radiating conductor layer 16 is reduced. As a result, miniaturization of antenna component 10 is achieved when viewed in the downward direction.
[0068] In the second radiating conductor layer 18 of the antenna component 10, the resonance direction is left-right. Therefore, current flows in either the left or right direction. Consequently, the length of the second radiating conductor layer 18 in the orthogonal direction is equal to the length of the first radiating conductor layer 16 in the orthogonal direction. As a result, the length of the second radiating conductor layer 18 in the front-back direction is increased, achieving a lower resistance in the second radiating conductor layer 18. Consequently, the radiation efficiency of the antenna is improved.
[0069] In the first radiating conductor layer 16 of the antenna component 10, the resonant direction is left-right. Therefore, current flows in either the left or right direction. Consequently, the length of the first radiating conductor layer 16 in the orthogonal direction is longer than its length in the resonant direction. Thus, the length of the first radiating conductor layer 16 in the front-back direction increases, achieving a lower resistance in the first radiating conductor layer 16. As a result, the radiation efficiency of the antenna is improved.
[0070] In antenna component 10, the vertical thickness of antenna component 10 in the second interval A12 is smaller than the vertical thickness of antenna component 10 in the first interval A11. Therefore, the second interval A12 is more easily deformed than the first interval A11. Thus, the second interval A12 can be bent in the downward or upward direction.
[0071] In the antenna component 10, the second ground conductor layer 30 has a ring shape surrounding the first radiating conductor layer 16 when viewed in the downward direction. As a result, electromagnetic waves radiated by the first radiating conductor layer 16 are less likely to reach components surrounding the antenna component 10. Furthermore, electromagnetic waves radiated by components surrounding the antenna component 10 are less likely to reach the first radiating conductor layer 16. Moreover, the directivity of the antenna is improved.
[0072] (First variation)
[0073] Hereinafter, the antenna component 10a involved in the first modified example will be described with reference to the accompanying drawings. Figure 4 This is a cross-sectional view of antenna component 10a.
[0074] Antenna component 10a differs from antenna component 10 in that its 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 insulating layers 14a, 14b and insulating layers 15a, 15c. Insulating layer 15c covers the lower main surface of the first insulating layer 14b. The second main body portion 12b includes second insulating layers 14c-14e and insulating layers 15b, 15d. Insulating layer 15d covers the upper main surface of the second insulating layer 14c.
[0075] In addition, antenna component 10a also includes mounting electrodes 40a-40d and solder 42a, 42b. Mounting electrodes 40a and 40c are located on the lower main surface of the first insulating layer 14b. Mounting electrode 40a is in contact with the lower end of the upper part of the interlayer connecting conductor v2. Mounting electrode 40c is in contact with the lower end of the upper part of the interlayer connecting conductor v1.
[0076] Mounting electrodes 40b and 40d are located on the upper main surface of the second insulating layer 14c. Mounting electrode 40b is in contact with the upper end of the lower part of the interlayer connecting conductor v2. Mounting electrode 40d is in contact with the upper end of the lower part of the interlayer connecting conductor v1.
[0077] Solder 42a is a conductive bonding material that connects mounting electrode 40a and mounting electrode 40b. Solder 42b is a conductive bonding material that connects mounting electrode 40c and mounting electrode 40d.
[0078] Here, in the second region A2, there are insulating layers 15c and 15d, air, and second insulating layers 14c to 14e. Therefore, the composite dielectric constant of the second region A2 is determined based on the dielectric constants of insulating layers 15c and 15d, the dielectric constant of air, the dielectric constants of second insulating layers 14c to 14e, the volumes of insulating layers 15c and 15d, the volume of air, and the volumes of second insulating layers 14c to 14e. The other structures of antenna component 10a are the same as those of antenna component 10, and therefore descriptions are omitted. Antenna component 10a can achieve the same effect as antenna component 10.
[0079] (Second variation)
[0080] Hereinafter, the antenna component 10b involved in the second modification will be described with reference to the accompanying drawings. Figure 5 This is a top view of antenna component 10b.
[0081] Antenna component 10b differs from antenna component 10 in that it also includes branch conductors 22a and 22b. Branch conductors 22a and 22b branch from the current path R. More specifically, branch conductor 22a branches forward from the signal conductor layer 20. Branch conductor 22b branches backward from the signal conductor layer 20. Therefore, the signal conductor layer 20 and branch conductors 22a and 22b are contained within a single conductor layer. Branch conductors 22a and 22b are located on the lower main surface of the second insulating layer 14c. Consequently, branch conductors 22a and 22b are located in the second region A2. Furthermore, branch conductors 22a and 22b overlap with the first radiating conductor layer 16 when viewed in the downward direction (negative direction of the Z-axis). Branch conductors 22a and 22b are located within a range of less than half the wavelength of a high-frequency signal from the first radiating conductor layer 16. Such branch conductors 22a and 22b are open-circuit stubs. Therefore, branch conductors 22a and 22b are not connected to conductor layers other than signal conductor layer 20. The other construction of antenna component 10b is the same as that of antenna component 10, therefore, description is omitted. Antenna component 10b can achieve the same effect as antenna component 10.
[0082] Furthermore, branch conductors 22a and 22b branch off from the current path R. Thus, branch conductors 22a and 22b serve to match the characteristic impedance of the first radiating conductor layer 16 with the characteristic impedance of the current path R. As a result, high-frequency signal reflection is suppressed at the boundary between the first radiating conductor layer 16 and the current path R, reducing high-frequency signal loss.
[0083] It should be noted that, for the following reasons, the branch conductors 22a and 22b are preferably not significantly separated from the first radiating conductor layer 16. A high-frequency signal is reflected at the power supply point P. The reflected high-frequency signal is reflected again at the branch conductors 22a and 22b. The reflected wave is radiated from the first radiating conductor layer 16 as an electromagnetic wave. Thus, in the antenna component 10b, the reflected wave is used as an electromagnetic wave for the high-frequency signal.
[0084] Here, when the branch conductors 22a and 22b are significantly separated from the first radiating conductor layer 16, reflected waves suffer loss between the branch conductors 22a and 22b and the first radiating conductor layer 16. Therefore, it is preferable that the branch conductors 22a and 22b are not significantly separated from the first radiating conductor layer 16. In the antenna component 10b, the branch conductors 22a and 22b are located within half the wavelength of the high-frequency signal from the first radiating conductor layer 16. Therefore, the influence of reflected waves caused by impedance matching can be reduced, and loss can be reduced.
[0085] (Third variation)
[0086] Hereinafter, the antenna component 10c involved in the third modification will be described with reference to the accompanying drawings. Figure 6 This is a cross-sectional view of antenna component 10c.
[0087] Antenna component 10c differs from antenna component 10 in that it also includes a radiating member 117. The radiating member 117 is constructed in a symmetrical relationship with respect to the power supply point P, and therefore its description is omitted. The other construction of antenna component 10c is the same as that of antenna component 10, and therefore its description is omitted. Antenna component 10c can achieve the same effect as antenna component 10.
[0088] Antenna component 10c also includes a radiating member 117. Thus, the first radiating conductor layer 16 and the radiating members 17 and 117 form a patch antenna. Furthermore, the half-wavelength of the high-frequency signal is equal to the sum of the left and right lengths of the first radiating conductor layer 16, the top and bottom lengths of the interlayer connecting conductor v21, the length from the interlayer connecting conductor v21 to the right end of the second radiating conductor layer 18, the top and bottom lengths of the interlayer connecting conductor v121, and the length from the interlayer connecting conductor v121 to the left end of the second radiating conductor layer 118. Therefore, when viewed in the downward direction, miniaturization of antenna component 10c is achieved. In addition, the symmetry of the radiation characteristics of antenna component 10c is improved.
[0089] (Fourth variation)
[0090] Hereinafter, the antenna component 10d involved in the fourth modification will be described with reference to the accompanying drawings. Figure 7 This is a cross-sectional view of antenna component 10d.
[0091] Antenna component 10d differs from antenna component 10 in that the second radiating conductor layer 18 is located on the lower main surface of the second insulating layer 14c. The other construction of antenna component 10d is the same as that of antenna component 10, and therefore description is omitted. Antenna component 10d can achieve the same effect as antenna component 10.
[0092] (Fifth variation)
[0093] Hereinafter, the antenna component 10e involved in the fifth modification will be described with reference to the accompanying drawings. Figure 8 This is a cross-sectional view of antenna component 10e.
[0094] Antenna component 10e differs from antenna component 10d in that its main body 12 includes a first main body portion 12a and a second main body portion 12b. Furthermore, a second radiating conductor layer 18 is disposed on the second main body portion 12b. The other structures of antenna component 10e are the same as those of antenna component 10d, and therefore descriptions are omitted. Antenna component 10e can achieve the same effect as antenna component 10d.
[0095] (Sixth variation)
[0096] Hereinafter, the antenna component 10f involved in the sixth modification will be described with reference to the accompanying drawings. Figure 9 This is a cross-sectional view of antenna component 10f.
[0097] In antenna component 10f, the upper end of the interlayer connecting conductor v1 is not in contact with the first radiating conductor layer 16. Antenna component 10f also includes a power supply conductor layer 34. The power supply conductor layer 34 is located on the lower main surface of the first insulating layer 14b. Furthermore, the power supply conductor layer 34 overlaps with the first radiating conductor layer 16 when viewed from below. As a result, a capacitance is formed between the first radiating conductor layer 16 and the power supply conductor layer 34. The upper end of the interlayer connecting conductor v1 is in contact with the power supply conductor layer 34.
[0098] In the antenna component 10f described above, high-frequency signals are transmitted between the first radiating conductor layer 16 and the power supply conductor layer 34 via a capacitor. The other construction of the antenna component 10f is the same as that of the antenna component 10, and therefore description is omitted. The antenna component 10f can achieve the same effect as the antenna component 10.
[0099] (Seventh variation)
[0100] Hereinafter, the antenna component 10g involved in the seventh modification will be described with reference to the accompanying drawings. Figure 10 This is a cross-sectional view of antenna component 10g.
[0101] Antenna component 10g differs from antenna component 10 in that it also includes an interlayer connecting conductor v25. The interlayer connecting conductor v25 connects the first radiating conductor layer 16 to the first grounding conductor layer 28. Thus, the first radiating conductor layer 16, the radiating member 17, the first grounding conductor layer 28, and the interlayer connecting conductor v25 form an inverted F-shaped antenna. Therefore, the antenna length can be 1 / 4 wavelength, thus achieving miniaturization of antenna component 10g. The other structures of antenna component 10g are the same as those of antenna component 10, and therefore descriptions are omitted. Antenna component 10g achieves the same effect as antenna component 10.
[0102] (Eighth variation)
[0103] Hereinafter, the antenna component 10h involved in the eighth modification will be described with reference to the accompanying drawings. Figure 11 This is a top view of antenna component 10h.
[0104] Antenna component 10h differs from antenna component 10 in that the first radiating conductor layer 16 is connected to the second ground conductor layer 30. Thus, the first radiating conductor layer 16, the radiating member 17, the first ground conductor layer 28, and the second ground conductor layer 30 form an inverted F-type antenna. The other construction of antenna component 10h is the same as that of antenna component 10, and therefore description is omitted. Antenna component 10h can achieve the same effect as antenna component 10.
[0105] (Other implementation methods)
[0106] The antenna components involved in this utility model are not limited to antenna components 10, 10a to 10h, and can be modified within the scope of its technical concept. In addition, the structures of antenna components 10, 10a to 10h can be combined arbitrarily.
[0107] It should be noted that the radiating member 17 may also have a structure other than that shown in the figure. The radiating member 17 may further include an interlayer connecting 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 connecting conductor. The second radiating conductor layer may be located below or above the second radiating conductor layer 18.
[0108] It should be noted that the second radiating conductor layer 18 is not a necessary component. Therefore, the radiating member 17 may also consist only of the interlayer connecting conductor v21.
[0109] It should be noted that the second grounding conductor layer 30 is not a necessary component.
[0110] It should be noted that the second radiating conductor layer 18 may also protrude from the first radiating conductor layer 16. In this case, when viewed in the downward direction, the area of the repeating region in the second radiating conductor layer 18 that overlaps with the first radiating conductor layer 16 may be larger than the area of the non-repeating region in the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16, or it may not be larger than the area of the non-repeating region in the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16.
[0111] It should be noted that the length of the second radiating conductor layer 18 in the orthogonal direction may not be equal to the length of the first radiating conductor layer 16 in the orthogonal direction.
[0112] It should be noted that the length of the first radiating conductor layer 16 in the orthogonal direction can also be less than or equal to the length of the first radiating conductor layer 16 in the resonant direction.
[0113] It should be noted that the branch conductors 22a and 22b may not overlap with the first radiating conductor layer 16 when viewed in the downward direction.
[0114] It should be noted that branch conductors 22a and 22b can also be short stubs.
[0115] It should be noted that branch conductors 22a and 22b can also be located in the first region A1.
[0116] It should be noted that, alternatively, the first insulating layers 14a and 14b can be made of ceramic, and the second insulating layers 14c to 14e can be made of liquid crystal polymer or polyimide. Alternatively, the first insulating layers 14a and 14b can be made of liquid crystal polymer with filler, and the second insulating layers 14c to 14e can also 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 can be made of polyimide with filler, and the second insulating layers 14c to 14e can also be made of polyimide. In this case, the dielectric constant of the filler is lower than that of the polyimide.
[0117] It should be noted that when the first insulating layers 14a and 14b in the antenna component 10a are made of ceramic, the first main body 12a is a non-flexible electronic component. On the other hand, the second main body 12b is a flexible circuit board. In this case, the first section A11 cannot be bent, while the second section A12 can be bent.
[0118] It should be noted that antenna components 10, 10a-10h may also lack the second interval 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 connecting conductor v1 is in contact with the external electrode.
[0119] It should be noted that in antenna component 10f, the power supply conductor layer 34 can also be located above the second insulating layers 14c to 14e. This reduces the number of interlayer connecting conductors in antenna component 10f.
[0120] It should be noted that when viewed in the downward direction, the second radiating conductor layer 18 can also protrude from the first radiating conductor layer 16. However, when viewed in the downward direction (the negative direction of the Z-axis), the area of the overlapping region in 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 in the second radiating conductor layer 18 that does not overlap with the first radiating conductor layer 16.
[0121] This utility model has the following structure. (1)
[0123] An antenna component includes a main body, a first radiating conductor layer, a radiating member, and a first grounding conductor layer.
[0124] The main body has a structure in which multiple insulating layers are arranged along the Z-axis.
[0125] The first radiative conductor layer is disposed on the main body.
[0126] The radiating member is disposed on the main body and located on the negative side of the Z-axis compared to the first radiating conductor layer. It is connected to the first radiating conductor layer but not connected to the ground potential.
[0127] The first grounding conductor layer is disposed on the main body, and when viewed along the negative direction of the Z-axis, it overlaps with the first radiating conductor layer and the radiating member, and is located on the negative side of the Z-axis than the first radiating conductor layer.
[0128] The negative end of the Z-axis of the radiating member is defined as the negative end.
[0129] The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the negative end and on the negative side of the Z-axis beyond the first radiating conductor layer, is defined as the first region. The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the first ground conductor layer and on the negative side of the Z-axis beyond the negative end, is defined as the second region.
[0130] The composite dielectric constant of the first region is higher than that of the second region. (2)
[0132] According to the antenna components described in (1), among which,
[0133] The radiating component includes an interlayer connecting conductor and a second radiating conductor layer.
[0134] The second radiative conductor layer is disposed on the main body and is located on the negative side of the Z-axis compared to the first radiative conductor layer.
[0135] The interlayer connecting conductor is disposed on the main body and extends along the Z-axis through one or more of the plurality of insulating layers, connecting the first radiating conductor layer and the second radiating conductor layer.
[0136] When viewed along the negative direction of the Z-axis, the area of the second radiative conductor layer is smaller than the area of the first radiative conductor layer. (3)
[0138] According to the antenna components described in (2), among which,
[0139] At least a portion of the second radiative conductor layer overlaps with the first radiative conductor layer when viewed along the negative direction of the Z-axis. (4)
[0141] According to the antenna components described in (3), among which,
[0142] When viewed along the negative direction of the Z-axis, the area of the repeating region in the second radiating conductor layer that overlaps with the first radiating conductor layer is greater than the area of the non-repeating region in the second radiating conductor layer that does not overlap with the first radiating conductor layer. (5)
[0144] According to any one of (2) to (4) the antenna component described therein,
[0145] The direction in which the electric field resonates in the first radiative conductor layer is defined as the resonance direction.
[0146] The direction orthogonal to the resonance direction when viewed along the negative direction of the Z-axis is defined as the orthogonal direction.
[0147] 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. (6)
[0149] According to any one of (2) to (4) the antenna component described therein,
[0150] The direction in which the electric field resonates in the first radiating conductor layer is defined as the resonance direction.
[0151] The direction orthogonal to the resonance direction when viewed along the negative direction of the Z-axis is defined as the orthogonal direction.
[0152] The length of the first radiating conductor layer in the orthogonal direction is longer than the length of the first radiating conductor layer in the resonant direction. (7)
[0154] According to any one of (1) to (6) the antenna component described therein,
[0155] The antenna component also includes a second ground conductor layer.
[0156] The second grounding conductor layer is disposed on the body and has a ring shape surrounding the first radiating conductor layer when viewed along the negative direction of the Z-axis. (8)
[0158] According to any one of (1) to (7) the antenna component described therein,
[0159] The antenna component also has a current path.
[0160] The current path is connected to the first radiating conductor layer.
[0161] High-frequency signals are transmitted in the current path. (9)
[0163] According to the antenna components described in (8), among which,
[0164] The antenna component also includes a branch conductor.
[0165] The branch conductor branches off from the current path. (10)
[0167] According to the antenna components described in (9), among which,
[0168] The branch conductor is located within a range of less than 1 / 2 of the wavelength of the high-frequency signal from the first radiating conductor layer. (11)
[0170] According to the antenna components described in (9) or (10), wherein,
[0171] The branch conductor is located in the second region. (12)
[0173] According to any one of (1) to (11) the antenna component described therein,
[0174] The plurality of insulating layers includes a first insulating layer and a second insulating layer.
[0175] The first insulating layer is located in the first region.
[0176] The second insulating layer is located in the second region.
[0177] The dielectric constant of the first insulating layer is higher than that of the second insulating layer.
[0178] Explanation of reference numerals in the attached figures
[0179] 10, 10a~10h: Antenna components;
[0180] 12: Main body;
[0181] 12a: First main body section;
[0182] 12b: Second main body section;
[0183] 14a, 14b: First insulating layer;
[0184] 14c~14e: Second insulating layer;
[0185] 15a~15d: Insulating layer;
[0186] 16: First radiative conductor layer;
[0187] 17, 117: Radiation components;
[0188] 18, 118: Second radiative conductor layer;
[0189] 20: Signal conductor layer;
[0190] 22a, 22b: Branch conductors;
[0191] 28: First grounding conductor layer;
[0192] 30: Second grounding conductor layer;
[0193] 32: Third grounding conductor layer;
[0194] 34: Power supply conductor layer;
[0195] 40a~40d: Install electrodes;
[0196] 42a, 42b: Solder;
[0197] A1: First area;
[0198] A11: First interval;
[0199] A12: Second interval;
[0200] A2: Second area;
[0201] P: Power supply point;
[0202] R: Current path;
[0203] t: negative side.
Claims
1. An antenna component, characterized in that, It comprises a main body, a first radiating conductor layer, radiating components, and a first grounding conductor layer. The main body has a structure in which multiple insulating layers are arranged along the Z-axis. The first radiative conductor layer is disposed on the main body. The radiating member is disposed on the main body and located on the negative side of the Z-axis compared to the first radiating conductor layer. It is connected to the first radiating conductor layer but not connected to the ground potential. The first grounding conductor layer is disposed on the main body, and when viewed along the negative direction of the Z-axis, it overlaps with the first radiating conductor layer and the radiating member, and is located on the negative side of the Z-axis than the first radiating conductor layer. The negative end of the Z-axis of the radiating member is defined as the negative end. The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the negative end and on the negative side of the Z-axis beyond the first radiating conductor layer, is defined as the first region. The region that overlaps with the first radiating conductor layer when viewed along the negative Z-axis, and is located on the positive side of the Z-axis beyond the first ground conductor layer and on the negative side of the Z-axis beyond the negative end, is defined as the second region. The composite dielectric constant of the first region is higher than that of the second region.
2. The antenna component according to claim 1, characterized in that, The radiating component includes an interlayer connecting conductor and a second radiating conductor layer. The second radiative conductor layer is disposed on the main body and is located on the negative side of the Z-axis compared to the first radiative conductor layer. The interlayer connecting conductor is disposed on the main body and extends along the Z-axis through one or more of the plurality of insulating layers, connecting the first radiating conductor layer and the second radiating conductor layer. When viewed along the negative direction of the Z-axis, the area of the second radiative conductor layer is smaller than the area of the first radiative conductor layer.
3. The antenna component according to claim 2, characterized in that, At least a portion of the second radiative conductor layer overlaps with the first radiative conductor layer when viewed along the negative direction of the Z-axis.
4. The antenna component according to claim 3, characterized in that, When viewed along the negative direction of the Z-axis, the area of the repeating region in the second radiating conductor layer that overlaps with the first radiating conductor layer is greater than the area of the non-repeating region in the second radiating conductor layer that does not overlap with the first radiating conductor layer.
5. The antenna component according to any one of claims 2 to 4, characterized in that, The direction in which the electric field resonates in the first radiative conductor layer is defined as the resonance direction. The direction orthogonal to the resonance direction when viewed along the negative direction of the Z-axis is defined as the 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.
6. The antenna component according to any one of claims 2 to 4, characterized in that, The direction in which the electric field resonates in the first radiating conductor layer is defined as the resonance direction. The direction orthogonal to the resonance direction when viewed along the negative direction of the Z-axis is defined as the orthogonal direction. The length of the first radiating conductor layer in the orthogonal direction is longer than the length of the first radiating conductor layer in the resonant direction.
7. The antenna component according to any one of claims 1 to 4, characterized in that, The antenna component also includes a second ground conductor layer. The second grounding conductor layer is disposed on the body and has a ring shape surrounding the first radiating conductor layer when viewed along the negative direction of the Z-axis.
8. The antenna component according to any one of claims 1 to 4, characterized in that, The antenna component also has a current path. The current path is connected to the first radiating conductor layer. High-frequency signals are transmitted in the current path.
9. The antenna component according to claim 8, characterized in that, The antenna component also includes a branch conductor. The branch conductor branches off from the current path.
10. The antenna component according to claim 9, characterized in that, The branch conductor is located within a range of less than 1 / 2 of the wavelength of the high-frequency signal from the first radiating conductor layer.
11. The antenna component according to claim 9 or 10, characterized in that, The branch conductor is located in the second region.
12. The antenna component according to any one of claims 1 to 4, characterized in that, The plurality of insulating layers includes a first insulating layer and a second insulating 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 that of the second insulating layer.