Broadband antenna
By designing a combination structure of substrate, film-shaped grounding conductor, and plate-shaped conductor in the antenna, and by adjusting the position and distance of the capacitor section, broadband was achieved, solving the problem of excessively narrow resonant bandwidth in multi-standard wireless communication equipment and meeting the signal transmission and reception requirements of the wireless LAN standard.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
- Filing Date
- 2024-05-23
- Publication Date
- 2026-07-07
AI Technical Summary
Existing technologies struggle to achieve broadband coverage for multiple wireless communication standards, resulting in antennas with excessively narrow resonant bandwidths that cannot meet the needs of multi-standard wireless communication devices.
A broadband antenna is designed, which adopts a combination structure of a substrate, a film-shaped grounding conductor, and a plate-shaped conductor. The broadband capability is achieved by adjusting the position and distance between the first capacitor section, the second capacitor section, and the power supply section.
It achieves broadband resonance in the 2.4GHz, 5GHz and 6GHz frequency bands, meets the signal transmission and reception requirements of the wireless LAN standard, and improves the efficiency of frequency band utilization.
Smart Images
Figure CN224472705U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a broadband antenna. Background Technology
[0002] In recent years, in addition to information devices such as personal computers, home appliances such as televisions and audio equipment have also begun to incorporate wireless terminals based on standards such as Wireless LAN (Local Area Network). To enable wireless communication in such devices, an antenna for wireless communication is installed inside the device's casing. In such antennas, to accommodate wireless communication using multiple standards, a wide resonant frequency band is required (see, for example, Patent Document 1).
[0003] Existing technical documents
[0004] Patent documents
[0005] Patent Document 1: Japanese Patent Application Publication No. 2015-050517 Utility Model Content
[0006] The problem to be solved by the utility model
[0007] This invention provides a broadband antenna that resonates in a desired frequency band.
[0008] Methods for solving problems
[0009] The broadband antenna according to one aspect of this utility model comprises: a substrate; a film-shaped grounding conductor disposed on the main surface of the substrate and grounded; and a plate-shaped conductor fixed to the substrate, the plate-shaped conductor having: a first portion having an elongated portion separate from the grounding conductor and disposed along the main surface of the substrate; a second portion separate from the grounding conductor and disposed along the main surface of the substrate, connected to the elongated portion; a grounding portion connected to the grounding conductor; a power supply portion fixed to the substrate without contacting the grounding conductor, connected to the second portion, and supplied with a signal; and a first capacitor portion and a second capacitor portion connected to the second portion, extending from the second portion toward the grounding conductor and separate from the grounding conductor, wherein the length direction of the elongated portion and the second portion is set as a first direction, and the antenna is connected to the grounding conductor. When the first direction intersects and the direction along the main surface of the substrate is set as the second direction, the length of the elongated portion in the first direction is longer than the length of the second portion in the first direction. In the plan view of the substrate, the elongated portion and the second portion are arranged in the second direction. The grounding portion is connected to the end of at least one of the elongated portion and the second portion in the first direction. The power supply portion, the first capacitor portion, and the second capacitor portion are connected to the end of the second portion in the second direction. The end of the elongated portion in the second direction is connected to the other end of the second portion in the second direction. The power supply portion is disposed between the first capacitor portion and the second capacitor portion in the first direction.
[0010] Another aspect of this utility model relates to a broadband antenna comprising: a substrate; a film-shaped grounding conductor disposed on the main surface of the substrate and grounded; and a plate-shaped conductor fixed to the substrate, the plate-shaped conductor having: a first portion having an elongated portion separate from the grounding conductor and disposed along the main surface of the substrate; a second portion separate from the grounding conductor and disposed along the main surface of the substrate, and connected to the elongated portion; a grounding portion connected to the grounding conductor; a power supply portion fixed to the substrate without contacting the grounding conductor and connected to the second portion, and supplied with a signal; and an additional grounding portion connected to the grounding conductor, wherein the length direction of the elongated portion and the second portion is defined as a first direction, and the plate-shaped conductor intersects the first direction and is disposed along the main surface of the substrate; and a second portion having a grounding portion that is connected to the grounding conductor; and a third portion having a grounding portion that is intersecting the first direction and disposed along the main surface of the substrate; a fourth portion having a grounding portion that is connected to the grounding conductor; and a fifth portion having a grounding portion that is connected to the grounding conductor; and a sixth portion having a grounding portion that is connected to the grounding conductor; and a seventh portion having a grounding portion that is connected to the grounding conductor; and a fifth ... When the direction of the main surface of the substrate is set as the second direction, the length of the elongated portion in the first direction is longer than the length of the second portion in the first direction. In the plan view of the substrate, the elongated portion and the second portion are arranged in the second direction. The grounding portion is connected to the end of at least one of the elongated portion and the second portion in the first direction. The power supply portion is connected to the end of one of the second portions in the second direction. The end of one of the elongated portions in the second direction is connected to the other end of the second portion in the second direction. The additional grounding portion is connected to the other end of the elongated portion in the second direction and is separate from the grounding portion.
[0011] Utility Model Effect
[0012] According to this invention, a broadband antenna that resonates in the desired frequency band can be realized. Attached Figure Description
[0013] Figure 1 This is a first perspective view of the broadband antenna involved in Embodiment 1.
[0014] Figure 2 This is a second perspective view of the broadband antenna involved in Implementation Method 1.
[0015] Figure 3 This is a plan view of the broadband antenna involved in Implementation Method 1.
[0016] Figure 4 It is a graph showing the relationship between the frequency and voltage standing wave ratio of the broadband antenna involved in Embodiment 1.
[0017] Figure 5 This is a first perspective view of the broadband antenna involved in Embodiment 2.
[0018] Figure 6 This is a second perspective view of the broadband antenna involved in Embodiment 2. Detailed Implementation
[0019] The embodiments will now be described in detail with reference to the accompanying drawings.
[0020] Furthermore, the embodiments described below are general or specific examples. The numerical values, shapes, materials, constituent elements, the arrangement and position of constituent elements, connection methods, steps, and the order of steps shown in the following embodiments are examples and are not intended to limit the present invention.
[0021] Furthermore, the figures are schematic diagrams and may not be strictly representational. Also, the same reference numerals are used to label the same components in each figure.
[0022] Furthermore, in this specification, terms such as parallel and perpendicular that indicate the relationship between elements, terms such as plate-like that indicate the shape of elements, and numerical ranges do not only indicate a strict meaning, but also mean that they include substantially equal ranges, such as differences of a few percent.
[0023] (Implementation Method 1)
[0024] The broadband antenna involved in Implementation Method 1 will be described.
[0025] [1-1. Structure]
[0026] First, use Figures 1-3 The structure of the broadband antenna involved in this embodiment will be described. Figure 1 , Figure 2 and Figure 3 These are, respectively, a first perspective view, a second perspective view, and a plan view of the broadband antenna 1 involved in this embodiment. Figures 1-3 The diagram shows the mutually perpendicular X-axis, Y-axis, and Z-axis.
[0027] The broadband antenna 1 described in this embodiment is an antenna for transmitting and receiving high-frequency signals. The high-frequency signal is not particularly limited, and may include signals from the 2.4GHz, 5GHz, or 6GHz bands based on wireless LAN standards. In this embodiment, the broadband antenna 1 resonates in the 2.4GHz, 5GHz, and 6GHz bands. Figures 1-3 As shown, the broadband antenna 1 includes a substrate 70, a grounding conductor 72, and a plate-shaped conductor 2. In this embodiment, the broadband antenna 1 also includes a floating conductor 76.
[0028] The substrate 70 serves as the base of the broadband antenna 1 and is a plate-shaped component with a pair of main surfaces. At least one main surface of the substrate 70 is composed of insulating components. A grounding conductor 72 and a floating conductor 76 are disposed on the main surface 71 of the substrate 70, which is composed of insulating components. Figures 1-3As shown, the main surface 71 is a plane perpendicular to the Z-axis direction. In other words, the main surface 71 is parallel to both the X-axis and Y-axis directions. In this embodiment, the substrate 70 is an insulating substrate. The material of the substrate 70 is not particularly limited. For example, a glass epoxy resin substrate can be used as the substrate 70.
[0029] The grounding conductor 72 is disposed on the main surface 71 of the substrate 70 and is a film-shaped conductor connected to the ground (i.e., grounded). The grounding conductor 72 extends along the main surface 71. In other words, the grounding conductor 72 extends along the XY plane. The material of the grounding conductor 72 is not particularly limited as long as it is a conductor. For example, a copper film disposed on the main surface 71 of the substrate 70 can be used as the grounding conductor 72.
[0030] The floating conductor 76 is a conductor disposed on the main surface 71 of the substrate 70 and separated from the ground conductor 72. When the plate-shaped conductor 2 is removed from the substrate 70, the floating conductor 76 is electrically insulated from the ground conductor 72. However, when the plate-shaped conductor 2 is mounted on the substrate 70, the floating conductor 76 is electrically connected to the ground conductor 72 via the plate-shaped conductor 2. Thus, in this specification, "separated" means physically separated (i.e., not in contact), and does not necessarily mean electrically insulated. The material of the floating conductor 76 can be any conductor and is not particularly limited. For example, a copper film disposed on the main surface 71 of the substrate 70 can be used as the floating conductor 76. Furthermore, the floating conductor 76 and the ground conductor 72 can be formed in the same process. In this embodiment, the floating conductor 76 is disposed in an island-like manner within the opening of the ground conductor 72. The floating conductor 76 extends along the main surface 71. In other words, the floating conductor 76 extends along the XY plane.
[0031] The plate-shaped conductor 2 is a plate-shaped conductive component fixed to the substrate 70. The plate-shaped conductor 2 is, for example, constructed from a bent plate-shaped metal component. The plate-shaped conductor 2 has a first portion 10, a second portion 20, a ground portion 52, and a power supply portion 41, and functions as an inverted-F antenna. In this embodiment, the plate-shaped conductor 2 also has a first capacitor portion 31, a second capacitor portion 32, and an additional ground portion 54. The first portion 10, the second portion 20, the ground portion 52, the power supply portion 41, the first capacitor portion 31, the second capacitor portion 32, and the additional ground portion 54 of the plate-shaped conductor 2 are electrically connected to each other.
[0032] The first part 10 has a first flat portion 11 that is separate from the grounding conductor 72 and disposed along the main surface 71 of the substrate 70. In this embodiment, the first part 10 is disposed parallel to the XY plane. The first part 10 is disposed at a predetermined distance greater than 0 from the grounding conductor 72. The first part 10 is electrically connected to the grounding conductor 72 via a grounding portion 52 and an additional grounding portion 54.
[0033] The first flat portion 11 has an elongated portion 12 and a bent portion 14. In this embodiment, the elongated portion 12 and the bent portion 14 are plate-shaped portions arranged parallel to the main surface 71 of the substrate 70. Hereinafter, the length direction of the elongated portion 12 (and the second portion 20) is defined as the first direction, and the direction intersecting the first direction and along the main surface 71 of the substrate 70 is defined as the second direction. In this embodiment, the first direction is perpendicular to the second direction. In the figures, the first direction corresponds to the X-axis direction, and the second direction corresponds to the Y-axis direction. The length of the elongated portion 12 in the first direction is greater than the length of the second portion 20 in the first direction.
[0034] In this embodiment, a grounding portion 52 is connected to one end of the elongated portion 12 in the first direction (in other words, the end on the positive side in the X-axis direction).
[0035] The bent portion 14 is disposed at the other end of the elongated portion 12 in the first direction (in other words, the end on the negative side in the X-axis direction) and extends in the second direction. The bent portion 14 is a plate-shaped portion disposed parallel to the main surface 71 of the substrate 70 (i.e., parallel to the XY plane). The bent portion 14 is separate from the second portion 20. In other words, a slit is formed between the bent portion 14 and the second portion 20 (the second flat portion 22 described later). Furthermore, the bent portion 14 is electrically connected to the second portion 20 via the elongated portion 12.
[0036] The first part 10 has a fixing part 16 that is fixed to the substrate 70 without contacting the grounding conductor 72. At least a portion of the fixing part 16 extends in a direction intersecting the main surface 71 of the substrate 70 (i.e., a direction intersecting the XY plane). In this embodiment, the fixing part 16 has a portion extending along the Z-axis and a portion extending on the main surface 71 of the substrate 70 in a direction parallel to the main surface 71 of the substrate 70 (i.e., a direction parallel to the XY plane). The portion of the fixing part 16 extending in the direction parallel to the main surface 71 of the substrate 70 is disposed on the floating conductor 76. The fixing part 16 and the floating conductor 76 are joined, for example, by a conductive bonding member such as solder. The method of fixing the fixing part 16 to the substrate 70 is not limited to this. For example, the fixing part 16 may not have a portion extending in the direction parallel to the main surface 71 of the substrate 70, and the portion of the fixing part 16 extending in the direction intersecting the main surface 71 of the substrate 70 (the Z-axis direction in this embodiment) may also be fixed to the substrate 70. In this case, for example, a through hole for inserting the fixing part 16 may be provided at a position on the substrate 70 corresponding to the fixing part 16, and the fixing part 16 may be fixed to the substrate 70 using a bonding material such as solder. Furthermore, the portion of the fixing part 16 extending in the direction intersecting the main surface 71 of the substrate 70 (in this embodiment, the Z-axis direction) is connected to the end of the bending part 14 in the first direction and the end distal from the second part 20.
[0037] The second part 20 is separate from the grounding conductor 72, arranged along the main surface 71 of the substrate 70, and connected to the elongated part 12. In this embodiment, the second part 20 is arranged along the X-axis direction. The second part 20 is configured such that its length direction is consistent with the first direction. Figure 3 As shown in the plan view of substrate 70, the elongated portion 12 and the second portion 20 are arranged in the second direction. The power supply portion 41, the first capacitor portion 31, and the second capacitor portion 32 are connected to one end of the second portion 20 in the second direction. One end of the elongated portion 12 in the second direction is connected to the other end of the second portion 20 in the second direction. Thus, the second portion 20, the elongated portion 12, the power supply portion 41, the first capacitor portion 31, and the second capacitor portion 32 are electrically connected to each other. Furthermore, the second portion 20 is electrically connected to the grounding conductor 72 via the elongated portion 12 of the first portion 10, the grounding portion 52, and the additional grounding portion 54.
[0038] In this embodiment, such as Figures 1-3 As shown, the second part 20 has a second flat portion 22 and a connecting portion 24. The second flat portion 22 is positioned closer to the substrate 70 than the elongated portion 12. The second flat portion 22 is a plate-shaped portion arranged parallel to the main surface 71 of the substrate 70 (i.e., parallel to the XY plane). A power supply portion 41, a first capacitor portion 31, and a second capacitor portion 32 are connected to one end of the second flat portion 22 in a second direction. In this embodiment, the power supply portion 41, the first capacitor portion 31, and the second capacitor portion 32 are connected to the positive end of the second flat portion 22 in the Y-axis direction. The connecting portion 24 is connected to the other end of the second flat portion 22 in the second direction. In this embodiment, the connecting portion 24 is connected to the negative end of the second flat portion 22 in the Y-axis direction. A slit is formed between the second flat portion 22 and the bent portion 14 of the first flat portion 11.
[0039] The connecting portion 24 connects the second flat portion 22 and the elongated portion 12 of the first portion 10. Thus, the second flat portion 22, the connecting portion 24, and the elongated portion 12 are electrically connected to each other. In this embodiment, the connecting portion 24 extends in a direction intersecting the main surface 71 of the substrate 70. More specifically, the connecting portion 24 extends in a direction perpendicular to the main surface 71 of the substrate 70 (i.e., the Z-axis direction).
[0040] The grounding portion 52 is connected to the grounding conductor 72. The grounding portion 52 is connected to the end of at least one of the elongated portion 12 and the second portion 20 in a first direction. In this embodiment, the grounding portion 52 is connected to the end of the elongated portion 12 in the first direction. More specifically, the grounding portion 52 is connected to the end of the elongated portion 12 on its positive side in the X-axis direction. The grounding portion 52 extends in a direction intersecting the main surface 71 of the substrate 70. More specifically, the grounding portion 52 extends in a direction perpendicular to the main surface 71 of the substrate 70 (i.e., the Z-axis direction) and in a second direction. The grounding portion 52 is joined to the grounding conductor 72, for example, by a conductive bonding member such as solder.
[0041] An additional grounding portion 54 is connected to the grounding conductor 72. The additional grounding portion 54 is connected to the other end of the elongated portion 12 in the second direction (i.e., the end opposite to the end connected to the second portion 20), and is separate from the grounding portion 52. Furthermore, the additional grounding portion 54 is electrically connected to the grounding portion 52 via the elongated portion 12 of the first portion 10. In the plate-shaped conductor 2 according to this embodiment, the power supply portion 41 is disposed at one end of the plate-shaped conductor 2 in the second direction, and the additional grounding portion 54 is disposed at the other end of the plate-shaped conductor 2 in the second direction. The additional grounding portion 54 extends in a direction intersecting the main surface 71 of the substrate 70. That is, the additional grounding portion 54 extends in a direction intersecting the XY plane. More specifically, the additional grounding portion 54 extends along a direction perpendicular to the main surface 71 of the substrate 70 (i.e., the Z-axis direction) and in the first direction. The additional grounding portion 54 is joined to the grounding conductor 72, for example, by a conductive bonding member such as solder.
[0042] The first capacitor portion 31 and the second capacitor portion 32 are connected to the second portion 20, extend from the second portion 20 toward the ground conductor 72, and are separated from the ground conductor 72. The first capacitor portion 31 and the second capacitor portion 32 extend in a direction intersecting the main surface 71 of the substrate 70 (i.e., the direction intersecting the XY plane). In this embodiment, the first capacitor portion 31 and the second capacitor portion 32 extend in a direction perpendicular to the main surface 71 of the substrate 70 (i.e., the Z-axis direction). The first capacitor portion 31 and the second capacitor portion 32 are connected to one end of the second portion 20 in a second direction. More specifically, the first capacitor portion 31 and the second capacitor portion 32 are connected to the end of the second portion 20 on the positive side in the Y-axis direction. The first capacitor portion 31 and the second capacitor portion 32 are arranged in a first direction. In the first direction, a power supply portion 41 is disposed between the first capacitor portion 31 and the second capacitor portion 32. The ends of the first capacitor portion 31 and the second capacitor portion 32 in the first direction are connected to the power supply portion 41. More specifically, the end of the first capacitor 31 on the negative side in the X-axis direction is connected to the end of the power supply 41 on the positive side in the X-axis direction, and the end of the second capacitor 32 on the positive side in the X-axis direction is connected to the end of the power supply 41 on the negative side in the X-axis direction.
[0043] In this embodiment, the distance between the first capacitor section 31 and the ground conductor 72 is different from the distance between the second capacitor section 32 and the ground conductor 72. More specifically, the distance between the first capacitor section 31 and the ground conductor 72 is smaller than the distance between the second capacitor section 32 and the ground conductor 72. In other words, the dimension of the first capacitor section 31 in the Z-axis direction is larger than the dimension of the second capacitor section 32 in the Z-axis direction.
[0044] In this embodiment, the dimensions of the first capacitor section 31 and the second capacitor section 32 are different in the first direction. More specifically, the dimension of the first capacitor section 31 in the first direction is smaller than the dimension of the second capacitor section 32 in the first direction.
[0045] The power supply unit 41 is fixed to the substrate 70 without contacting the ground conductor 72, and is connected to the second part 20, where it is supplied with signals (high-frequency signals). The power supply unit 41 is disposed, for example, at the opening of the ground conductor 72, and is separate from the ground conductor 72. For example, a signal is supplied to the power supply unit 41 from the back side of the main surface 71 on which the ground conductor 72 is disposed, via a through electrode (in other words, a through-hole electrode). The power supply unit 41 is joined to the through electrode, for example, via a conductive bonding member such as solder. Furthermore, the power supply unit 41 is electrically connected to the ground conductor 72 via the second part 20, the elongated part 12, the ground part 52, and an additional ground part 54.
[0046] In this embodiment, the power supply section 41 is connected to one end of the second section 20 in the second direction. In other words, the power supply section 41 is connected to the end of the second section 20 opposite to the end connected to the elongated section 12. At least a portion of the power supply section 41 extends in a direction intersecting the main surface 71 of the substrate 70 (i.e., the direction intersecting the XY plane). In this embodiment, the power supply section 41 has a portion extending in a direction perpendicular to the main surface 71 of the substrate 70 (i.e., the Z-axis direction), and a portion connected to this portion and extending in a direction parallel to the main surface 71 of the substrate 70 (i.e., the direction parallel to the XY plane). The portion of the power supply section 41 extending in a direction parallel to the main surface 71 of the substrate 70 is fixed to the substrate 70. Alternatively, the power supply section 41 may not have a portion extending in a direction parallel to the main surface 71 of the substrate 70, and the portion of the power supply section 41 extending in a direction intersecting the main surface 71 of the substrate 70 (the Z-axis direction in this embodiment) may also be fixed to the substrate 70. In this case, for example, a through hole for inserting the power supply unit 41 may be provided on the substrate 70 at a position corresponding to the power supply unit 41, and the fixing part 16 may be fixed to the substrate 70 using a bonding material such as solder. The power supply unit 41 is disposed between the first capacitor unit 31 and the second capacitor unit 32 in a first direction. One end of the power supply unit 41 in the first direction is connected to the first capacitor unit 31, and the other end is connected to the second capacitor unit 32. In this embodiment, the positive end of the power supply unit 41 in the X-axis direction is connected to the first capacitor unit 31, and the negative end in the X-axis direction is connected to the second capacitor unit 32.
[0047] [1-2. Effects]
[0048] use Figure 4 The effects of the broadband antenna 1 involved in this embodiment will be explained. Figure 4 This is a graph showing the relationship between the frequency and the voltage standing wave ratio (VSWR) of the broadband antenna 1 involved in this embodiment.
[0049] The broadband antenna 1 according to the first embodiment includes: a substrate 70; a film-shaped grounding conductor 72 disposed on the main surface 71 of the substrate 70 and grounded; and a plate-shaped conductor 2 fixed to the substrate 70. The plate-shaped conductor 2 has: a first portion 10 having an elongated portion 12 disposed along the main surface 71 of the substrate 70, separate from the grounding conductor 72; a second portion 20 disposed along the main surface 71 of the substrate 70, separate from the grounding conductor 72 and connected to the elongated portion 12; a grounding portion 52 connected to the grounding conductor 72; a power supply portion 41 fixed to the substrate 70 without contacting the grounding conductor 72 and connected to the second portion 20, and supplied with signals; and a first capacitor portion 31 and a second capacitor portion 32 connected to the second portion 20, extending from the second portion 20 toward the grounding conductor 72, and separate from the grounding conductor 72. When the length direction of the elongated portion 12 and the second portion 20 is defined as the first direction, and the direction intersecting the first direction and along the main surface 71 of the substrate 70 is defined as the second direction, the length of the elongated portion 12 in the first direction is longer than the length of the second portion 20 in the first direction. In the plan view of the substrate 70, the elongated portion 12 and the second portion 20 are arranged along the second direction. The grounding portion 52 is connected to at least one of the elongated portion 12 and the second portion 20 at one end in the first direction. The power supply portion 41, the first capacitor portion 31, and the second capacitor portion 32 are connected to one end of the second portion 20 in the second direction, and one end of the elongated portion 12 in the second direction is connected to the other end of the second portion 20 in the second direction. The power supply portion 41 is disposed between the first capacitor portion 31 and the second capacitor portion 32 in the first direction.
[0050] Thus, in the broadband antenna 1 according to the first method, a first capacitor section 31 and a second capacitor section 32 that form a capacitance with the ground conductor 72 are arranged on both sides of the power supply section 41 in the first direction.
[0051] Here, while comparing the comparative example antenna with the broadband antenna 1 according to the first embodiment, the effect of the broadband antenna 1 according to the first embodiment will be explained. The comparative example antenna differs from the broadband antenna 1 according to the first embodiment in that it lacks the first capacitor section 31 and the second capacitor section 32, but is the same in other aspects. In the comparative example antenna, the VSWR decreases only in the narrow frequency band in which the first part 10 resonates and the narrow frequency band in which the second part 20 resonates.
[0052] On the other hand, in the broadband antenna 1 according to the first method, by providing a first capacitor section 31 and a second capacitor section 32, the resonant frequency band can be widened. In particular, the frequency band where the second section 20 resonates can be widened. Specifically, as... Figure 4As shown, in the broadband antenna 1 according to the first embodiment, VSWR can be reduced in the 2.4 GHz band where the first part 10 resonates primarily and in the band from approximately 5 GHz to approximately 8 GHz where the second part 20 resonates primarily. Thus, according to the broadband antenna 1 according to the first embodiment, an antenna that resonates in the desired frequency band can be realized. The broadband antenna 1, for example, can transmit and receive signals in the 2.4 GHz band, 5 GHz band, and 6 GHz band used in wireless LAN standards.
[0053] The broadband antenna 1 involved in the second method includes: a substrate 70; a film-shaped grounding conductor 72 disposed on the main surface 71 of the substrate 70 and grounded; and a plate-shaped conductor 2 fixed to the substrate 70. The plate-shaped conductor 2 has: a first portion 10 having an elongated portion 12 separated from the grounding conductor 72 and disposed along the main surface 71 of the substrate 70; a second portion 20 separated from the grounding conductor 72 and disposed along the main surface 71 of the substrate 70, and connected to the elongated portion 12; a grounding portion 52 connected to the grounding conductor 72; a power supply portion 41 fixed to the substrate 70 without contacting the grounding conductor 72, and connected to the second portion 20, and supplied with signals; and an additional grounding portion 54 connected to the grounding conductor 72. When the length direction of the elongated portion 12 and the second portion 20 is set as the first direction, and the direction intersecting the first direction and along the main surface 71 of the substrate 70 is set as the second direction, the length of the elongated portion 12 in the first direction is longer than the length of the second portion 20 in the first direction. In the plan view of substrate 70, the elongated portion 12 and the second portion 20 are arranged in the second direction, and the grounding portion 52 is connected to the end of at least one of the elongated portion 12 and the second portion 20 in the first direction. The power supply portion 41 is connected to the end of the second portion 20 in the second direction. The end of the elongated portion 12 in the second direction is connected to the other end of the second portion 20 in the second direction. An additional grounding portion 54 is connected to the other end of the elongated portion 12 in the second direction and is separate from the grounding portion 52.
[0054] In the broadband antenna 1 according to the second method, the resonant frequency band of the broadband antenna 1 can be easily controlled by providing an additional grounding portion 54. Specifically, by changing the arrangement position of the additional grounding portion 54 in the first direction, the frequency band that mainly resonates in the first part 10 can be shifted. For example, by arranging the additional grounding portion 54 closer to the grounding portion 52 in the first direction, the frequency band that mainly resonates in the first part 10 can be shifted towards the lower frequency side. Conversely, by arranging the additional grounding portion 54 further away from the grounding portion 52 in the first direction, the frequency band that mainly resonates in the first part 10 can be shifted towards the higher frequency side.
[0055] Besides using the method of adding a grounding part 54, it is also possible to mainly adjust the frequency band that resonates in the first part 10. For example, by adjusting the length of the long strip 12 in the first direction, the frequency band that mainly resonates in the first part 10 can be adjusted. However, in such an adjustment method, the frequency band that mainly resonates in the second part 20 is also affected by the adjustment of the length of the long strip 12, so the adjustment is difficult.
[0056] In contrast, in the broadband antenna 1 according to the second embodiment, even if the configuration position of the additional grounding portion 54 in the first direction is changed, the frequency band that mainly resonates in the second part 20 is hardly affected. That is, by changing the configuration position of the additional grounding portion 54 in the first direction, it is possible to selectively shift only the frequency band that mainly resonates in the first part 10. Thus, in the broadband antenna 1 according to the second embodiment, an antenna that resonates in the desired frequency band can be easily realized.
[0057] In the third approach, the broadband antenna 1 has a different distance between the first capacitor section 31 and the ground conductor 72 compared to the first approach. The distance between the second capacitor section 32 and the ground conductor 72 is different.
[0058] This allows for adjustment of the frequency band primarily at the resonance of the second part, 20.
[0059] In the broadband antenna 1 involved in the fourth method, in either the first or third method, the plate conductor 2 has an additional grounding portion 54 connected to the ground conductor 72, the additional grounding portion 54 is connected to the other end of the strip portion 12 in the second direction, and is separated from the grounding portion 52.
[0060] Thus, it achieves the same effect as the broadband antenna 1 involved in the second method.
[0061] In any one of the first to fourth embodiments, the second part 20 of the broadband antenna 1 involved in the fifth embodiment has: a second flat part 22 disposed at a position closer to the substrate 70 than the elongated part 12; and a connecting part 24 connecting the second flat part 22 and the elongated part 12.
[0062] The height difference between the elongated portion 12 of the first part 10 and the second flat portion 22 of the second part 20 can be used to adjust the characteristics of the broadband antenna 1.
[0063] In any one of the first to fifth embodiments, the broadband antenna 1 involved in the sixth embodiment has a first part 10 having a fixing part 16 that is fixed to the substrate 70 without contacting the ground conductor 72, and at least a portion of the fixing part 16 extends in a direction intersecting the main surface 71 of the substrate 70.
[0064] Therefore, the plate-shaped conductor 2 can be fixed to the substrate 70 via the power supply section 41, the grounding section 52, and the fixing section 16. This allows for a more secure fixation of the plate-shaped conductor 2 to the substrate 70. Furthermore, since the fixing section 16 also functions as part of the inverted-F antenna, it can suppress the increase in size of the first section 10 in the first direction and increase the electrical length of the first section 10. In other words, it can suppress the increase in size of the plate-shaped conductor 2 in the first direction and achieve resonance in the low-frequency band.
[0065] In any one of the first to sixth embodiments, the broadband antenna 1 involved in the seventh embodiment has a first part 10 having a bent part 14, which is disposed at the other end in the first direction, extends in the second direction, and is isolated from the second part 20.
[0066] Therefore, it is possible to suppress the increase in size of the first part 10 in the first direction and to increase the electrical length of the first part 10. That is, it is possible to suppress the increase in size of the plate conductor 2 in the first direction and to achieve resonance in the low-frequency band.
[0067] The broadband antenna 1 involved in the eighth method resonates in the 2.4 GHz band, 5 GHz band, and 6 GHz band in any one of the first to seventh methods.
[0068] Thus, for example, in order to transmit and receive signals used in wireless LAN standards, a broadband antenna 1 can be used.
[0069] (Implementation Method 2)
[0070] The broadband antenna according to Embodiment 2 will be described. The broadband antenna according to this embodiment differs from the broadband antenna 1 according to Embodiment 1 in its second-part structure. Hereinafter, focusing on the differences from the broadband antenna 1 according to Embodiment 1, the following will be described using... Figure 5 and Figure 6 This describes the broadband antenna involved in this embodiment. Figure 5 and Figure 6 These are, respectively, a first perspective view and a second perspective view of the broadband antenna 101 involved in this embodiment. Figure 5 and Figure 6 In, with Figures 1-3 Similarly, the mutually perpendicular X-axis, Y-axis, and Z-axis are shown.
[0071] The broadband antenna 101 according to this embodiment includes a substrate 70, a grounding conductor 72, and a plate-shaped conductor 102. In this embodiment, the broadband antenna 101 also includes a floating conductor 76.
[0072] The plate-shaped conductor 102 is a plate-shaped conductive component fixed to the substrate 70. The plate-shaped conductor 102 is, for example, constructed from a bent plate-shaped metal component. The plate-shaped conductor 102 has a first portion 10, a second portion 120, a ground portion 52, and a power supply portion 41, and functions as an inverted-F antenna. In this embodiment, the plate-shaped conductor 102 also has a first capacitor portion 31, a second capacitor portion 32, and an additional ground portion 54.
[0073] The second part 120 in this embodiment is similar to the second part 20 in Embodiment 1, being separate from the grounding conductor 72, disposed along the main surface 71 of the substrate 70, and connected to the elongated part 12. The second part 120 is disposed such that its length direction is consistent with the first direction.
[0074] In this embodiment, no height difference is formed between the elongated portion 12 of the first portion 10 and the second portion 120. That is, the upper surfaces (the surfaces away from the substrate 70) of the elongated portion 12 and the second portion 120 are connected in such a way that they become the same plane. In other words, the second portion 120 is a plate-shaped portion arranged parallel to the main surface 71 of the substrate 70 (i.e., parallel to the XY plane), and the distance from the second portion 120 to the substrate 70 is substantially equal to the distance from the first portion 10 to the substrate 70.
[0075] In the broadband antenna 101 with such a plate-shaped conductor 102, it also achieves the same effect as the broadband antenna 1 according to Embodiment 1.
[0076] (Variations, etc.)
[0077] The broadband antenna of this utility model has been described above based on various embodiments, but this utility model is not limited to the above embodiments. As long as it does not depart from the spirit of this utility model, various modifications that can be conceived by those skilled in the art to the above embodiments can also be included within the scope of this utility model.
[0078] For example, in the above embodiments, the grounding portion 52 is connected to the elongated portion 12 of the first portion 10, but the structure of the grounding portion 52 is not limited to this. For example, the grounding portion 52 may be connected to the second portion 20 or the second portion 120, or it may be connected to both the first portion 10 and the second portion 20 (or the second portion 120).
[0079] In addition, in the above embodiments, the first part 10 has a bending part 14 and a fixing part 16, but it may not have at least one of the bending part 14 and the fixing part 16.
[0080] Furthermore, in the above embodiments, the distance between the first capacitor section 31 and the grounding conductor 72 is smaller than the distance between the second capacitor section 32 and the grounding conductor 72, but it can also be larger or equal. Additionally, in the above embodiments, the dimension of the first capacitor section 31 in the first direction is smaller than the dimension of the second capacitor section 32 in the first direction, but it can also be larger or equal.
[0081] In addition, in the above embodiments, the plate-shaped conductor has an additional grounding portion 54, but it may not have an additional grounding portion 54.
[0082] In addition, in the above embodiments, the plate-shaped conductor has a first capacitor portion 31 and a second capacitor portion 32, but the plate-shaped conductor may not have at least one of the first capacitor portion 31 and the second capacitor portion 32.
[0083] Furthermore, the present invention also includes any combination of the constituent elements and functions in the various embodiments without departing from the spirit of the present invention.
[0084] [Industrial Applicability]
[0085] The broadband antenna of this invention can be used as a wireless communication antenna, for example, in devices such as personal computers or television receivers.
[0086] Symbol Explanation
[0087] 1. 101 Broadband Antenna
[0088] 2. 102 Plate-shaped conductor
[0089] 10 Part 1
[0090] 11 First flat section
[0091] 12 Long strip section
[0092] 14. Bend
[0093] 16 Fixing Part
[0094] Part 20, 120
[0095] 22 Second flat section
[0096] 24 Connecting parts
[0097] 31 First capacitor section
[0098] 32 Second capacitor section
[0099] 41 Power Supply Department
[0100] 52 Grounding part
[0101] 54. Add grounding part
[0102] 70 substrate
[0103] 71 Main side
[0104] 72 Grounding conductor
[0105] 76 Floating Conductor
Claims
1. A broadband antenna, comprising: substrate; A film-shaped grounding conductor is disposed on the main surface of the substrate and grounded; and A plate-shaped conductor is fixed to the substrate. The plate-shaped conductor has: The first part has an elongated section that is separate from the grounding conductor and arranged along the main surface of the substrate; The second part is separate from the grounding conductor and arranged along the main surface of the substrate, and connected to the elongated part; The grounding part is connected to the grounding conductor; The power supply unit is fixed to the substrate without contacting the grounding conductor and is connected to the second unit, and is supplied with signals; as well as A first capacitor section and a second capacitor section are connected to the second section, extend from the second section toward the grounding conductor, and are separated from the grounding conductor. When the length direction of the elongated portion and the second portion is defined as the first direction, and the direction intersecting the first direction and along the main surface of the substrate is defined as the second direction, The length of the elongated portion in the first direction is longer than the length of the second portion in the first direction. In the plan view of the substrate, the elongated portion and the second portion are arranged in the second direction. The grounding portion is connected to the end of at least one of the elongated portion and the second portion in the first direction. The power supply unit, the first capacitor unit, and the second capacitor unit are connected to one end of the second unit in the second direction. One end of the elongated portion in the second direction is connected to the other end of the second portion in the second direction. The power supply unit is disposed between the first capacitor unit and the second capacitor unit in the first direction.
2. The broadband antenna according to claim 1, wherein, The plate-shaped conductor has an additional grounding portion connected to the grounding conductor, the additional grounding portion being connected to the other end of the strip in the second direction and separated from the grounding portion.
3. The broadband antenna according to claim 1 or 2, wherein, The second part has: The flat portion is positioned closer to the substrate than the elongated portion; and A connecting portion that connects the flat portion and the elongated portion.
4. The broadband antenna according to claim 1 or 2, wherein, The first part has a fixing part that is fixed to the substrate without contacting the grounding conductor, and at least a portion of the fixing part extends in a direction that intersects the main surface of the substrate.
5. The broadband antenna according to claim 1 or 2, wherein, The first part has: The bent portion is disposed at the other end in the first direction, extends along the second direction, and is separated from the second portion.
6. The broadband antenna according to claim 1 or 2, wherein, The distance between the first capacitor and the grounding conductor is different from the distance between the second capacitor and the grounding conductor.
7. The broadband antenna according to claim 1 or 2, wherein, The broadband antenna resonates in the 2.4 GHz, 5 GHz and 6 GHz frequency bands.
8. A broadband antenna, comprising: substrate; A film-shaped grounding conductor is disposed on the main surface of the substrate and grounded; and A plate-shaped conductor is fixed to the substrate. The plate-shaped conductor has: The first part has an elongated section that is separate from the grounding conductor and arranged along the main surface of the substrate; The second part is separate from the grounding conductor and arranged along the main surface of the substrate, and connected to the elongated part; The grounding part is connected to the grounding conductor; The power supply unit is fixed to the substrate without contacting the grounding conductor and is connected to the second unit, and is supplied with signals; as well as An additional grounding part is added and connected to the grounding conductor. When the length direction of the elongated portion and the second portion is defined as the first direction, and the direction intersecting the first direction and along the main surface of the substrate is defined as the second direction, The length of the elongated portion in the first direction is longer than the length of the second portion in the first direction. In the plan view of the substrate, the elongated portion and the second portion are arranged in the second direction. The grounding portion is connected to the end of at least one of the elongated portion and the second portion in the first direction. The power supply unit is connected to one end of the second unit in the second direction. One end of the elongated portion in the second direction is connected to the other end of the second portion in the second direction. The additional grounding portion is connected to the other end of the elongated portion in the second direction, and is separated from the grounding portion.