Antenna

Abstract

The antenna includes: a dielectric layer; a linear first antenna element provided on a first surface of the dielectric layer; a power supply line provided on a second surface of the dielectric layer opposite to the first surface, the power supply line having a power supply point; and a first via hole penetrating the dielectric layer and connected to the first antenna element and the power supply line, the power supply line including a first line portion connected to the first via hole, the line width of the first line portion being wider than the width of the first antenna element.

Description

Technical Field

[0001] This disclosure relates to antennas.

[0002] This application claims priority based on Japanese Application No. 2023-046844, filed on March 23, 2023, and incorporates all the contents of the aforementioned Japanese application. Background Technology

[0003] In recent years, antennas for wireless communication mounted on electronic devices have sometimes been mounted on a substrate. For example, Patent Document 1 discloses an inverted F-type antenna constructed by mounting antenna elements on a substrate. (See, for example, Patent Document 1).

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2001-168629 Summary of the Invention

[0007] The antenna in this embodiment includes: a dielectric layer; a linear first antenna element disposed on a first surface of the dielectric layer; a power supply line disposed on a second surface of the dielectric layer opposite to the first surface, and having a power supply point; and a first via penetrating the dielectric layer and connected to the first antenna element and the power supply line. The power supply line includes a first line portion connected to the first via. The line width of the first line portion is wider than the width of the first antenna element. Attached Figure Description

[0008] [ Figure 1 ] Figure 1 This is a top view showing an example of the antenna in the first embodiment.

[0009] [ Figure 2 ] Figure 2 It is a three-dimensional diagram showing the main parts of the antenna.

[0010] [ Figure 3 ] Figure 3 This is an enlarged view of the main parts of the first page.

[0011] [ Figure 4 ] Figure 4 This is an enlarged view of the main parts of the second page.

[0012] [ Figure 5 ] Figure 5 This is a top view showing the main parts of the antenna in the second embodiment.

[0013] [ Figure 6 ] Figure 6This is a top view showing the main parts of the antenna in the third embodiment.

[0014] [ Figure 7 ] Figure 7 This is a top view showing the main parts of the antenna in the fourth embodiment.

[0015] [ Figure 8 ] Figure 8 This is a top view showing the main part of the antenna in the fifth embodiment.

[0016] [ Figure 9 ] Figure 9 This is a diagram illustrating the dimensions of various parts of the model of the antenna according to the first embodiment, showing the dimensions of the power supply line.

[0017] [ Figure 10 ] Figure 10 This is a diagram illustrating the dimensions of various parts of the model of the antenna according to the first embodiment, showing the dimensions of the first antenna element, the second antenna element, and the passive element.

[0018] [ Figure 11 ] Figure 11 It is a Smith chart depicting the input impedance of the power supply point of Comparative Example 1 and Examples 1 to 4.

[0019] [ Figure 12 ] Figure 12 This is a graph showing the frequency characteristics of the VSWR of Comparative Example 1 and Examples 1 to 4.

[0020] [ Figure 13 ] Figure 13 This is a Smith chart depicting the input impedance of the power supply point in Example 5.

[0021] [ Figure 14 ] Figure 14 This is a graph showing the frequency characteristics of the VSWR in Example 5.

[0022] [ Figure 15 ] Figure 15 This is a Smith chart depicting the input impedance of the power supply point in Example 6.

[0023] [ Figure 16 ] Figure 16 This is a graph showing the frequency characteristics of the VSWR in Example 6.

[0024] [ Figure 17 ] Figure 17 This is a Smith chart depicting the input impedance of the power supply point in Example 7.

[0025] [ Figure 18 ] Figure 18 This is a graph showing the frequency characteristics of the VSWR in Example 7. Detailed Implementation

[0026] [The problem this disclosure aims to solve]

[0027] Antennas mounted on a substrate have a simple structure, but on the other hand, the means for adjusting antenna characteristics are sometimes limited, and it is sometimes difficult to obtain good VSWR (Voltage Standing Wave Ratio) characteristics in the operating frequency band. Therefore, a solution is desired that can obtain good VSWR characteristics with a simple structure.

[0028] [The Effects of This Disclosure]

[0029] According to this disclosure, good VSWR characteristics can be obtained.

[0030] [Description of embodiments of this disclosure]

[0031] First, the implementation methods will be described in detail.

[0032] [Summary of Implementation Methods]

[0033] The inventors of this application, through repeated and in-depth research on improving the characteristics of antennas mounted on a substrate (dielectric layer), gained the insight that the structure of the power supply line has a significant impact on antenna characteristics compared to other structures. This disclosure is based on this insight.

[0034] (1) That is, the antenna according to an embodiment of the present disclosure includes: a dielectric layer; a linear first antenna element disposed on a first surface of the dielectric layer; a power supply line disposed on a second surface of the dielectric layer opposite to the first surface and having a power supply point; and a first via penetrating the dielectric layer and connected to the first antenna element and the power supply line. The power supply line includes a first line portion connected to the first via. The line width of the first line portion is wider than the width of the first antenna element.

[0035] According to the above structure, the power supply line has a first line section with a line width wider than that of the first antenna element, thereby enabling a large-scale reduction in the VSWR of the frequency band targeted by the first antenna element. As a result, good VSWR characteristics can be obtained.

[0036] (2) In the antenna described in (1) above, if the power supply line also includes a second line section connecting the power supply point and the first line section, the second line section may be narrower than the line width of the first line section. In this case, only the necessary portion of the power supply line may be wider than the width of the first antenna element.

[0037] (3) Alternatively, in the antenna described in (1) or (2) above, the power supply line may include: a line body having a cross section that intersects the first antenna element when viewed from the front of the dielectric layer; and a pair of first short stake wires extending along the first antenna element from both sides of the cross section. In this case, the VSWR characteristics can be effectively improved.

[0038] (4) Furthermore, in the antenna described in (1) or (2) above, the antenna may also include a linear passive element that extends along the length of the first antenna element and is disposed on the first surface at a predetermined interval relative to the first antenna element. In this case, the VSWR characteristics can be improved more effectively.

[0039] (5) In any of the antennas described in (1) to (4) above, when the first antenna element has an electrical length corresponding to the first frequency band, the antenna may also include: a linear second antenna element extending along the length direction of the first antenna element and disposed on the first surface at a predetermined interval relative to the first antenna element, having an electrical length corresponding to a second frequency band lower than the first frequency band; and a second via penetrating the dielectric layer and connected to the second antenna element and the power supply line.

[0040] In this case, by adjusting the line width of the first line portion of the power supply line within a range wider than the width of the first antenna element, it is possible to change the VSWR characteristics of the first antenna element in the first frequency band without causing a significant change in the VSWR characteristics of the second frequency band. As a result, the VSWR characteristics of the first frequency band can be selectively improved.

[0041] (6) Alternatively, in the antenna described in (5) above, the second antenna element may be provided at a predetermined interval from the side opposite to the side of the first antenna element on which the ground conductor portion is provided.

[0042] (7) Alternatively, in the antenna described in (5) or (6) above, the power supply line may include: a line body having a first crossing portion that intersects with the first antenna element when viewed from the front of the dielectric layer; and a pair of first short stake wires extending along the first antenna element from both sides of the first crossing portion. In this case, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the VSWR characteristics of the second frequency band, thus effectively improving the VSWR characteristics of the first frequency band.

[0043] (8) Furthermore, in any of the antennas described in (5) to (7) above, the power supply line may also include: a line body having a second crossing portion that intersects with the second antenna element when viewed from the front of the dielectric layer; and a pair of second short stakes extending along the second antenna element from both sides of the second crossing portion. In this case, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the VSWR characteristics of the second frequency band, thus effectively improving the VSWR characteristics of the first frequency band.

[0044] (9) In any of the antennas described in (5) to (8) above, the antenna may also include a linear passive element disposed on the first surface at a predetermined interval from the opposite side of the side of the first antenna element facing the second antenna element. In this case, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the VSWR characteristics of the second frequency band, and the VSWR characteristics of the first frequency band can be improved more effectively.

[0045] (10) In any of the antennas in (5) to (9) above, the first antenna element may be an inverted F-type antenna and the second antenna element may be an inverted L-type antenna.

[0046] (11) In any of the antennas described in (1) to (10) above, the first antenna element may include: an antenna element body connected to the first via; and a short-circuit conductor portion connecting a ground conductor portion disposed parallel to the antenna element body to one end of the antenna element body, wherein the line width of the first line portion is wider than the line width of the short-circuit conductor portion. In this case, the VSWR characteristics can be effectively improved.

[0047] (12) In the antenna of (11) above, the first line portion may have an overlapping portion, which overlaps with the short-circuit conductor portion when viewed from the front of the dielectric layer.

[0048] [Details of the implementation method]

[0049] Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. Furthermore, at least some of the embodiments described below may be combined in any way.

[0050] [Regarding the first implementation]

[0051] [Regarding the overall structure]

[0052] Figure 1 This is a top view showing an example of antenna 1 as an antenna in the first embodiment. Figure 2 This is a three-dimensional view showing the main parts of antenna 1.

[0053] Antenna 1 is, for example, an antenna used for wireless LAN communication. Antenna 1 is an antenna composed of a conductor pattern formed on a substrate (dielectric layer) of an electronic device with wireless LAN communication function.

[0054] Furthermore, in the following explanation, the three mutually orthogonal directions in each diagram are designated as the X, Y, and Z directions. Additionally, as... Figure 1 As shown, one direction in the X direction is designated as X1, and the opposite direction of X1 is designated as X2. Similarly, one direction in the Y direction is designated as Y1, and the opposite direction of Y1 is designated as Y2. Finally, one direction in the Z direction is designated as Z1, and the opposite direction of Z1 is designated as Z2.

[0055] Antenna 1 includes a dielectric layer 2, a first ground conductor portion 4, a second ground conductor portion 6, a first antenna element 8, a second antenna element 10, a power supply line 12, and a passive element 14. The first antenna element 8 and the second antenna element 10 are antenna elements capable of transmitting and receiving signals in different frequency bands. In other words, antenna 1 in this embodiment is a multi-band antenna capable of transmitting and receiving signals in two frequency bands through the first antenna element 8 and the second antenna element 10.

[0056] In this embodiment, the dielectric layer 2 is a dielectric substrate on which the first antenna element 8, the second antenna element 10, and other components are mounted. The dielectric layer 2 is a rigid substrate, but a flexible substrate can also be used. Examples of materials for the dielectric layer 2 include polyimide resin, epoxy resin, PPE resin, and fluoropolymer resin. The dielectric layer 2 is arranged along the XY plane.

[0057] In this embodiment, a single-layer substrate having a dielectric layer 2 is used. However, the dielectric layer 2 may also constitute part or all of a multilayer substrate having multiple dielectric layers.

[0058] like Figure 1 as well as Figure 2 As shown, the first antenna element 8, the second antenna element 10, the passive element 14, and the first ground conductor portion 4 are mounted on the first surface 2a of the dielectric layer 2. The first surface 2a is parallel to the XY plane. The first surface 2a is the surface of the dielectric layer 2 facing the Z2 direction. The power supply line 12 and the second ground conductor portion 6 are mounted on the second surface 2b of the dielectric layer 2. The second surface 2b is parallel to the XY plane. The second surface 2b is the surface of the dielectric layer 2 facing the Z1 direction.

[0059] The first grounding conductor portion 4 is a conductor pattern of copper or the like mounted on the first surface 2a. The first grounding conductor portion 4 has an edge portion 4a. The edge portion 4a is the edge portion on the X2 direction side of the first grounding conductor portion 4. The edge portion 4a is parallel to the Y direction. The second grounding conductor portion 6 is a conductor pattern of copper or the like mounted on the second surface 2b. The second grounding conductor portion 6 has an edge portion 6a. The edge portion 6a is the edge portion on the X2 direction side of the second grounding conductor portion 6. The edge portion 6a is parallel to the Y direction. The position of the edge portion 6a in the X direction is the same as the position of the edge portion 4a in the X direction. The first grounding conductor portion 4 and the second grounding conductor portion 6 are mounted in the dielectric layer 2 outside the rectangular portion of the edge portion on the X2 direction side. Therefore, the first surface 2a has a first region 2a1 and a second region 2a2. The first region 2a is the region covered by the first grounding conductor portion 4. The second region 2a2 is the region in the first surface 2a other than the first region 2a1. The edge portion 4a is located at the boundary between the first region 2a1 and the second region 2a2. Furthermore, the second surface 2b has a third region 2b1 and a fourth region 2b2. The third region 2b1 is the region covered by the second grounding conductor portion 6. The fourth region 2b2 is the region in the second surface 2b excluding the third region 2b1. The edge portion 6a is located at the boundary between the third region 2b1 and the fourth region 2b2. The position of the end edge of the second region 2b2 on the X1 direction side is the same as the position of the end edge of the fourth region 2b2 on the X1 direction side in the X direction.

[0060] [Regarding the first antenna element 8 and the second antenna element 10]

[0061] Figure 3 This is an enlarged view of the main part of the first surface 2a. The first antenna element 8, the second antenna element 10, and the passive element 14 are conductor patterns of copper, etc., mounted in the second region 2a2 of the first surface 2a. The first antenna element 8 has a first antenna element body 8a and a short-circuit conductor portion 8b. The first antenna element body 8a is linear. Furthermore, "linear" refers to a long and continuous shape, and also includes shapes that have a certain width and are long and continuous, such as strips or ribbons. In this specification, it refers to a long and rectangular shape like the first antenna element 8.

[0062] The first antenna element body 8a extends along the Y direction. The first antenna element body 8a is arranged at a predetermined interval relative to the edge portion 4a. In other words, the first antenna element body 8a is arranged at a predetermined interval on the X1 direction side of the first ground conductor portion 4. The first antenna element body 8a has a first element end 8a1 and a second element end 8a2. The first element end 8a1 is the end of the first antenna element body 8a on the Y1 direction side. The second element end 8a2 is the end of the first antenna element body 8a on the Y2 direction side.

[0063] The short-circuit conductor portion 8b is connected to the second element end portion 8a2. The short-circuit conductor portion 8b has a rectangular shape. The short-circuit conductor portion 8b extends from the edge portion 4a in the X2 direction. The short-circuit conductor portion 8b connects the second element end portion 8a2 to the first ground conductor portion 4. Therefore, the short-circuit conductor portion 8b short-circuits the second element end portion 8a2. On the other hand, the first element end portion 8a1 is an open end.

[0064] The second element end 8a2 of the first antenna element body 8a is connected to the side portion 8b1 of the short-circuit conductor portion 8b. That is, the first antenna element body 8a extends from the side portion 8b1 along the Y direction. Furthermore, the side edge 8a3 of the first antenna element body 8a extends along the Y-direction extension line of the front end edge 8b2 of the short-circuit conductor portion 8b. The first antenna element 8 (first antenna element body 8a) has an electrical length corresponding to a first frequency band. In this embodiment, the first frequency band is a band from 5 GHz to 6 GHz.

[0065] The second antenna element 10 is linear. The second antenna element 10 extends along the Y direction. The second antenna element 10 is disposed next to the first antenna element 8 (the main body 8a of the first antenna element) at a predetermined interval. Therefore, the second antenna element 10 is disposed at a predetermined interval from the side (side edge 8a3) opposite to the side of the first antenna element 8 on which the first ground conductor portion 4 is disposed.

[0066] The second antenna element 10 has a third element end 10a and a fourth element end 10b. The third element end 10a is the end of the second antenna element 10 on the Y1 direction side. The fourth element end 10b is the end of the second antenna element 10 on the Y2 direction side. The third element end 10a is located on the Y1 direction side closer than the first element end 8a1. In addition, the fourth element end 10b is located on the Y2 direction side closer than the second element end 8a2. That is, the second antenna element 10 is longer than the first antenna element 8. The third element end 10a and the fourth element end 10b are open ends. The second antenna element 10 has a second antenna element body 10c and a short stud wire portion 10d. The second antenna element body 10c is the portion of the second antenna element 10 connected by the second through hole 18 (described later) and the third element end 10a. The short stud wire portion 10d is the portion of the second antenna element 10 connected by the second through hole 18 and the fourth element end 10b. The second antenna element 10 (the second antenna element body 10c) has an electrical length corresponding to the second frequency band. In this embodiment, the second frequency band is a band from 2.4 GHz to 2.5 GHz.

[0067] The passive element 14 is linear. The passive element 14 extends along the Y-direction. The passive element 14 is disposed between the first antenna element 8 (first antenna element body 8a) and the edge 4a. That is, the passive element 14 is disposed at a predetermined interval from the opposite side of the side of the first antenna element 8 facing the second antenna element 10. The Y-direction position of the fifth element end 14a of the passive element 14 is between the first element end 8a1 and the third element end 10a. Furthermore, the Y-direction position of the sixth element end 14b of the passive element 14 is within the range of the position of the power supply line 12, which will be described later.

[0068] Additionally, antenna 1 includes a first via 16 and a second via 18. For example... Figure 2 as well as Figure 3 As shown, the first via 16 penetrates the dielectric layer 2 and is connected to the power supply line 12 on the first antenna element 8 and the second surface 2b side. The second via 18 penetrates the dielectric layer 2 and is connected to the second antenna element 10 and the power supply line 12 on the second surface 2b side. In this embodiment, a via refers to a hole that penetrates the dielectric layer 2 and is conductive by providing a conductive metal plating layer on its inner surface or by filling its interior with conductive metal. The first via 16 and the second via 18 will be described later.

[0069] [Regarding power supply lines]

[0070] Figure 4 This is an enlarged view of the main parts of page 2b. (See image below.) Figure 4 As shown, the second grounding conductor portion 6 of the second surface 2b has a slit 6b. The slit 6b extends from the edge portion 6a in the X1 direction. The second grounding conductor portion 6 is not provided in the inner portion of the slit 6b in the second surface 2b. Therefore, the inner portion of the slit 6b in the second surface 2b is part of the fourth region 2b2.

[0071] Multiple vias 20 are provided on both sides of the slit 6b in the Y direction. The multiple vias 20 penetrate the dielectric layer 2 and connect to the second ground conductor portion 6 and the first ground conductor portion 4. Thus, the multiple vias 20 connect the second ground conductor portion 6 and the first ground conductor portion 4. The multiple vias 20 are arranged along the slit 6b.

[0072] Furthermore, in this embodiment, the connection between via 20 and the first grounding conductor 4 refers to the electrical connection between via 20 and the first grounding conductor 4. This electrical connection includes not only cases where via 20 and the first grounding conductor 4 are in direct contact or are connected via other conductors, but also cases where via 20 and the first grounding conductor 4 are connected at high frequency through mutual capacitive coupling. The same applies to the "connection" of conductors to each other in the following description.

[0073] exist Figure 4In this configuration, the power supply line 12 is a conductor pattern, such as copper, installed in the fourth region 2b2 of the second surface 2b. The power supply line 12 extends along the X direction. The power supply line 12 is arranged such that it passes through the slit 6b and protrudes from the edge 6a toward the X2 direction side. The power supply line 12 includes a first line portion 22 and a second line portion 24. The first line portion 22 is the portion of the power supply line 12 located outside the slit 6b (more toward the X2 direction side than the edge 6a).

[0074] The second line section 24 is the portion of the power supply line 12 disposed within the slit 6b. A small gap is provided between the two edges of the second line section 24 in the Y direction and the end edge of the second grounding conductor section 6 in the slit 6b. The second line section 24, together with the second grounding conductor sections 6 located on both sides of the second line section 24, forms a coplanar line. The second line section 24 has a power supply point 25. The power supply point 25 is disposed at the end of the second line section 24 in the X1 direction. A signal source S, such as a communication module for wireless LAN communication, is connected to the power supply point 25. Furthermore, the second line section 24 has a thin line section 24a and a thick line section 24b. The power supply point 25 is disposed in the thick line section 24b. The thin line section 24a is disposed between the first line section 22 and the thick line section 24b. Thus, the second line section 24 connects the power supply point 25 to the first line section 22.

[0075] The first line section 22 has a line body 26, a pair of first short stakes 28, and a pair of second short stakes 30. The line body 26 has a rectangular shape. The line width (width in the Y direction) of the line body 26 (first line section 22) is wider than the width of the slit 6b. Therefore, the line width of the line body 26 is wider than the line width of the second line section 24. The line body 26 has a base edge 26f. The base edge 26f is the edge of the line body 26 on the X1 direction side. The base edge 26f is parallel to the Y direction. A small gap is provided between the base edge 26f and the edge 6a. The second line section 24 is connected to the base edge 26f. The second line section 24 is connected to the center of the base edge 26f.

[0076] Figure 4 The dashed lines in the diagram represent the outlines of the first antenna element 8, the second antenna element 10, and the passive element 14 on the first surface 2a side of the dielectric layer 2 when viewed from the front in the Z1 direction. For example... Figure 4 As shown, the line width of the line body 26 is wider than the line width (width in the X direction) of the first antenna element body 8a of the first antenna element 8. Furthermore, the line width of the line body 26 is wider than the line width (width in the Y direction) of the short-circuit conductor portion 8b of the first antenna element 8. Also, the line width of the line body 26 is wider than the line width (width in the X direction) of the second antenna element 10.

[0077] The main body 26 has a first intersection 26a and a second intersection 26b. The first intersection 26a is a portion of the main body 26 that intersects with the first antenna element 8 when the dielectric layer 2 is viewed from the front in the Z1 direction. The second intersection 26b is a portion of the main body 26 that intersects with the second antenna element 10 when the dielectric layer 2 is viewed from the front in the Z1 direction. In addition, the main body 26 has an overlapping portion 26e that overlaps with the short-circuit conductor portion 8b when the dielectric layer 2 is viewed from the front.

[0078] A first via 16 is connected to the first intersection 26a. The first via 16 is connected to the center of the line width of the line body 26 at the first intersection 26a. The first via 16 penetrates the dielectric layer 2 and is connected to the portion of the first intersection 26a and the first antenna element 8 corresponding to the first intersection 26a. Therefore, the first via 16 connects the line body 26 and the first antenna element 8.

[0079] A second via 18 is connected to the second intersection 26b. The second via 18 is connected to the center of the line width of the line body 26 in the second intersection 26b. The second via 18 penetrates the dielectric layer 2 and connects to the second intersection 26b and the portion of the second antenna element 10 corresponding to the second intersection 26b. Therefore, the second via 18 connects the line body 26 to the second antenna element 10.

[0080] A pair of first short stake lines 28 protrude from both side edges 26c of the main track body 26. The pair of first short stake lines 28 extend in a rectangular shape from both sides of the first intersection 26a in the Y direction. The pair of first short stake lines 28 protrude from the side edges 26c with the same dimensions. Figure 4 As shown, when viewed from the front, a pair of first short stake lines 28 extend along the first antenna element 8 from both sides of the first intersection 26a in the Y direction. Furthermore, the width of the pair of first short stake lines 28 in the X direction is the same as the line width of the first antenna element body 8a. Therefore, in Figure 4 In the middle, the two sides of the first short stake line 28 extending from the main body of the line 26 in the Y1 direction are aligned with the two sides of the first antenna element main body 8a in the X direction. The first short stake line 28 extending from the main body of the line 26 in the Y2 direction overlaps with the short-circuit conductor part 8b.

[0081] Similar to the pair of first short stakes 28, a pair of second short stakes 30 also protrude from the side edges 26c of the main track body 26. The pair of second short stakes 30 extend in a rectangular shape from both sides of the second intersection 26b in the Y direction. The pair of second short stakes 30 protrude from the side edges 26c with the same dimensions as each other. Figure 4As shown, a pair of second short stake lines 30 extend along the second antenna element 10 from both sides of the second intersection 26b in the Y direction when viewed from the front of the dielectric layer 2. Furthermore, the width of the pair of second short stake lines 30 in the X direction is the same as the line width of the second antenna element 10. Therefore, in Figure 4 In this configuration, the X-direction edges of the pair of second short stake lines 30 coincide with the X-direction edges of the second antenna element 10. Furthermore, the X2-direction edges of the pair of second short stake lines 30 are linearly connected to the front edge 26d of the main line body 26. The front edge 26d coincides with the X2-direction edge of the second antenna element 10.

[0082] As described above, the power supply line 12 is connected to the first antenna element 8 and the second antenna element 10 via the first via 16 and the second via 18. Therefore, the first antenna element 8 is powered from the signal source S via the power supply line 12 and the first via 16. Here, the first element end 8a1 of the first antenna element body 8a is an open end. Furthermore, the second element end 8a2 is short-circuited via the short-circuit conductor portion 8b. Additionally, the first via 16 connects between the two element ends 8a1 and 8a2 of the first antenna element body 8a. Therefore, the first antenna element 8 constitutes an inverted-F type antenna. Furthermore, an inverted-F antenna refers to an antenna having an antenna element, a power supply line connected to the antenna element, and a short-circuit line grounding the antenna element, and whose input impedance can be adjusted by the spacing between the power supply line and the short-circuit line.

[0083] Furthermore, the second antenna element 10 is powered from the signal source S via the power supply line 12 and the second via 18. Here, the second via 18 connects between the two element ends 10a and 10b of the second antenna element 10. Additionally, the third element end 10a, which is the end of the second antenna element 10 (the second antenna element body 10c), is an open end. Therefore, the second antenna element 10 (the second antenna element body 10c), together with the power supply line 12 and the second via 18, constitutes an inverted L-shaped antenna. Furthermore, an inverted L-shaped antenna refers to an antenna formed by bending the antenna element of a monopole antenna at a right angle at the middle portion of the element.

[0084] In this embodiment, the second antenna element 10 is shown to have a short stake section 10d in addition to the second antenna element body 10c. This short stake section 10d functions as a short stake line provided in the inverted L-shaped antenna. Therefore, in this embodiment, an inverted F-shaped antenna including the second antenna element 10 is shown with the short stake section 10d, but it is also possible to configure it without the short stake section 10d.

[0085] In the antenna 1 described above, the first antenna element 8 and the second antenna element 10 are used to transmit and receive signals in the first frequency band and the second frequency band.

[0086] According to this embodiment, the power supply line 12 includes a first line portion 22 (line body 26) having a line width wider than that of the first antenna element 8, thus enabling a wide range of reductions in the VSWR of the first antenna element 8 in the first frequency band. As a result, good VSWR characteristics can be obtained. In particular, in this embodiment, the VSWR characteristics of the second antenna element 10 in the second frequency band are not significantly changed, while the VSWR characteristics of the first antenna element 8 in the first frequency band are allowed to change.

[0087] In a multi-band antenna with two antenna elements, adjusting the characteristics of one antenna element can sometimes change the characteristics of the other. Therefore, it can be difficult to properly set the characteristics of both antenna elements.

[0088] In this respect, in this embodiment, by adjusting the line width of the first line section 22 within a range wider than the width of the first antenna element 8, it is possible to prevent a significant change in the VSWR characteristics of the second frequency band targeted by the second antenna element 10 while allowing a change in the VSWR characteristics of the first antenna element 8 in the first frequency band. As a result, the VSWR characteristics of the first frequency band can be selectively improved. Therefore, the VSWR characteristics of the two antenna elements 8 and 10 can be easily set individually, and the characteristics of both antenna elements 8 and 10 can be appropriately set.

[0089] Furthermore, in this embodiment, the power supply line 12 includes a second line section 24 that connects the power supply point 25 to the first line section 22. The second line section 24 is narrower than the line width of the first line section 22. Therefore, it is possible to make only the necessary portion of the power supply line 12 wider than the width of the first antenna element 8.

[0090] Furthermore, in this embodiment, the power supply line 12 includes: a line body 26 having a first crossover portion 26a and a second crossover portion 26b; a pair of first short stake wires 28 extending from both sides of the first crossover portion 26a along the first antenna element 8; and a pair of second short stake wires 30 extending from both sides of the second crossover portion 26b along the second antenna element 10. In this case, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the VSWR characteristics of the second frequency band, thus effectively improving the VSWR characteristics of the first frequency band.

[0091] Furthermore, the antenna 1 of this embodiment includes a linear passive element 14, which is disposed at a predetermined interval from the side opposite to the side on which the second antenna element 10 is disposed on either side of the first antenna element 8. This allows for a more effective improvement in the VSWR characteristics of the first frequency band without causing a significant change in the VSWR characteristics of the second frequency band.

[0092] [Regarding other implementation methods]

[0093] Figure 5 This is a top view showing the main parts of the antenna 1 according to the second embodiment. The antenna 1 of this embodiment differs from the first embodiment in that it does not have a pair of first short stakes 28, a pair of second short stakes 30, and a passive element 14. Otherwise, it is the same as the first embodiment. In the second embodiment, the power supply line 12 also includes a first line portion 22 (line body 26) having a line width wider than that of the first antenna element 8, thus enabling a wider reduction in the VSWR of the first frequency band targeted by the first antenna element 8.

[0094] Figure 6 This is a top view showing the main parts of the antenna 1 according to the third embodiment. The antenna 1 of this embodiment differs from the first embodiment in that it does not have a pair of first short stakes 28 and a passive element 14. Otherwise, it is the same as the first embodiment. In the third embodiment, the power supply line 12 also has a first line section 22, thus enabling a wider reduction in the VSWR of the first frequency band targeted by the first antenna element 8. Furthermore, in this embodiment, a pair of second short stakes 30 extending from the line body 26 along the second antenna element 10 are provided. Therefore, the VSWR characteristics of the first frequency band can be effectively improved.

[0095] Figure 7 This is a top view showing the main parts of the antenna 1 according to the fourth embodiment. The antenna 1 of this embodiment differs from the first embodiment in that it does not have the passive element 14. Other aspects are the same as the first embodiment. In the fourth embodiment, the power supply line 12 also has a first line section 22, thus enabling a wider reduction in the VSWR of the first frequency band targeted by the first antenna element 8. Furthermore, in this embodiment, a pair of first short stake lines 28 extending from the line body 26 along the first antenna element 8 and a pair of second short stake lines 30 extending along the second antenna element 10 are provided. Therefore, the VSWR characteristics of the first frequency band can be effectively improved.

[0096] Figure 8This is a top view showing the main parts of the antenna 1 according to the fifth embodiment. The antenna 1 of this embodiment differs from the first embodiment in that it does not have a second antenna element 10, a passive element 14, and a pair of second short stake wires 30. Because the antenna 1 of this embodiment does not have a second antenna element 10, it can transmit and receive only in the first frequency band.

[0097] In this embodiment, since the second antenna element 10 is not present, the length of the line body 26 in the X direction is shorter than in the first embodiment. The edges of the pair of first short stake lines 28 in the X2 direction are connected in a straight line to the front edge 26d of the line body 26. The front edge 26d coincides with the edge of the first antenna element 8 in the X2 direction.

[0098] In this embodiment, the power supply line 12 also has a first line portion 22, which has a line width wider than that of the first antenna element 8. Therefore, the VSWR in the first frequency band targeted by the first antenna element 8 can be reduced over a wider range. As a result, good VSWR characteristics can be obtained.

[0099] Furthermore, in the fifth embodiment, a case with a pair of first short stake lines 28 is shown, but it can also be configured without the pair of first short stake lines 28.

[0100] 〔other〕

[0101] In the above embodiments, in addition to the case where the power supply line 12 has a pair of first short stake wires 28 and a pair of second short stake wires 30, a case without short stake wires and only having a pair of second short stake wires 30 is also shown. However, it can also be configured to have a pair of first short stake wires 28 but not a pair of second short stake wires 30. The same effect can be obtained in this case.

[0102] Furthermore, from other perspectives, the antenna of this embodiment of the present disclosure comprises: a dielectric layer; a linear first antenna element disposed on a first surface of the dielectric layer and having an electrical length corresponding to a first frequency band; a linear second antenna element disposed on the first surface of the dielectric layer and having an electrical length corresponding to a second frequency band lower than the first frequency band; a power supply line disposed on a second surface opposite to the first surface of the dielectric layer and having a power supply point; a first via penetrating the dielectric layer and connected to the first antenna element and the power supply line; and a second via penetrating the dielectric layer and connected to the second antenna element and the power supply line.

[0103] According to this structure, since it has a first via connecting to the first antenna element and a second via connecting to the second antenna element, it is possible to directly power the two antenna elements from the power supply line. As a result, it is not necessary to power the other antenna element through one antenna element, and the characteristics of the two antenna elements can be easily set individually.

[0104] [Regarding verification experiments]

[0105] Next, the verification test conducted on the effectiveness of antenna 1 will be described. As a test method, a model of antenna 1 according to the above embodiments was constructed, and the frequency characteristics of VSWR of antenna 1 were obtained by computer simulation using the model. The first frequency band, which is the object of the first antenna element, was set to the frequency band of 5 GHz to 6 GHz, and the second frequency band, which is the object of the second antenna element, was set to the frequency band of 2.4 GHz to 2.5 GHz, and the VSWR in these frequency bands was evaluated.

[0106] Figure 9 This is a diagram illustrating the dimensions of various parts of the model of the antenna 1 according to the first embodiment, showing the dimensions of the power supply line 12. Additionally, Figure 10 This is a diagram illustrating the dimensions of various parts of the model of the antenna 1 according to the first embodiment, showing the dimensions of the first antenna element 8, the second antenna element 10, and the passive element 14. Furthermore, Figure 10 This indicates the view from the Z1 direction.

[0107] exist Figure 9In this circuit, the dimensions of each part of the power supply line 12 are set as follows: Y-direction dimension of dielectric layer 2: 60mm; X-direction dimension of dielectric layer 2: 50mm; Line width W1 of line body 26: 4.7mm; Line width W2 of thin wire portion 24a (second line portion 24): 0.4mm; Line width W3 of thick wire portion 24b (second line portion 24): 0.7mm; Width W4 of slit 6b: 0.96mm; Diameter of first via 16, second via 18, and via 20: 0.3mm; Spacing P of via 20: 1mm; Line width W5 of first short stake line 28: 1mm; Line width W6 of second short stake line 30: 1mm; The first short stake line 28 and the second short stake line 30... The distance L3 between the two short stake lines 30 is 1.1 mm; the dimension L1 between the front ends of a pair of first short stake lines 28 is 10.4 mm; the dimension L2 between the front ends of a pair of second short stake lines 30 is 6.7 mm; the length L4 from the pair of first short stake lines 28 to the base edge 26f of the main body 26 is 3.1 mm; the length L5 from the base edge 26f to the edge 6a is 0.3 mm; the length L6 from the edge 6a to the front end of the thick line 24b (second line section 24) is 10 mm; the length L7 from the boundary between the thin line section 24a and the thick line section 24b to the edge 6a is 4 mm; and the width W8 in the X direction of the fourth region 2b2 is 9 mm.

[0108] exist Figure 10In this design, the dimensions of each component are set as follows: Width W10 of the first antenna element body 8a: 1 mm; Width W11 of the second antenna element 10: 1 mm; Width W12 of the passive element 14: 1 mm; Spacing W13 between the first antenna element 8 and the second antenna element 10: 1.1 mm; Spacing W14 between the first antenna element body 8a and the passive element 14: 0.7 mm; Spacing W15 from the passive element 14 to the edge 4a: 1.7 mm; Dimension L10 from the edge of the first element end 8a1 of the first antenna element 8 to the center line C: 6.3 mm. Furthermore, the center line C is a straight line parallel to the X direction, passing through the centers of the vias 20, the first via 16, and the second via 18 arranged in the Y direction. The dimension L11 from the center line C to the edge of the short-circuit conductor 8b in the Y2 direction is 6.1 mm; the dimension L12 from the edge of the third element end 10a of the second antenna element 10 to the center line C is 15.8 mm; the dimension L13 from the center line C to the edge of the fourth element end 10b of the second antenna element 10 is 7.2 mm; the dimension L14 from the edge 4a to the edge of the short-circuit conductor 8b in the X2 direction is 4.4 mm; the dimension L15 from the edge of the fifth element end 14a of the passive element 14 to the edge of the first element end 8a1 in the Y direction is 6.1 mm; the dimension L16 from the edge of the first element end 8a1 to the edge of the sixth element end 14b of the passive element 14 in the Y direction is 6.4 mm; the width W16 of the short-circuit conductor 8b in the Y direction is 4 mm; and the distance W17 between the edge of the short-circuit conductor 8b in the Y1 direction and the center line C is 2.1 mm.

[0109] Furthermore, the dielectric layer 2 has a thickness of 1.462 mm, a relative permittivity of 4.355, and a dielectric loss tangent of 0.0157. The conductor pattern mounted on the dielectric layer 2, such as the first antenna element 8, the first ground conductor portion 4, and the second ground conductor portion 6, is a copper foil with a thickness of 0.036 mm.

[0110] The dimensions of the model in other embodiments are set according to the dimensions of the antenna 1 model in the first embodiment.

[0111] • The influence of the line width of the first line section 22

[0112] Using the model of antenna 1 according to the second embodiment, the effect of the line width of the first line section 22 (line body 26) on VSWR was verified. In addition, the dimensions of the model of antenna 1 according to the second embodiment are the same as those of the model of antenna 1 according to the first embodiment, except that it does not have the first short stake line 28, the second short stake line 30, the passive element 14, and the line width W1 of the line body 26 is variable.

[0113] The following Comparative Example 1 and Examples 1 to 4 are used. Comparative Example 1: The line width W1 of the line body 26 is set to 1 mm (the same as the width W10 of the first antenna element 8). Example 1: The line width W1 of the line body 26 is set to 2 mm. Example 2: The line width W1 of the line body 26 is set to 3 mm. Example 3: The line width W1 of the line body 26 is set to 4 mm. Example 4: The line width W1 of the line body 26 is set to 5 mm.

[0114] Figure 11 It is a Smith chart depicting the input impedance of the power supply point of Comparative Example 1 and Examples 1 to 4. Figure 11 The dots marked m1 to m10 represent the following impedances: m1: impedance of Comparative Example 1 at a frequency of 2.45 GHz; m2: impedance of Example 1 at a frequency of 2.45 GHz; m3: impedance of Example 2 at a frequency of 2.45 GHz; m4: impedance of Example 3 at a frequency of 2.45 GHz; m5: impedance of Example 4 at a frequency of 2.45 GHz; m6: impedance of Comparative Example 1 at a frequency of 5.5 GHz; m7: impedance of Example 1 at a frequency of 5.5 GHz; m8: impedance of Example 2 at a frequency of 5.5 GHz; m9: impedance of Example 3 at a frequency of 5.5 GHz; m10: impedance of Example 4 at a frequency of 5.5 GHz.

[0115] Figure 11 The line graphs show that at a frequency of 2.45 GHz, Example 1 has the lowest reflection coefficient, and the reflection coefficient increases with increasing line width W1. Additionally, Figure 11 The line graphs in the diagram show that at a frequency of 5.5 GHz, Comparative Example 1 exhibits the highest reflection coefficient when the line width W1 of the line body 26 is increased, and the reflection coefficient decreases as the line width W1 increases. Furthermore, Figure 11 The impedance change relative to the change in line width W1 at a frequency of 5.5 GHz is more significant than the impedance change relative to the change in line width W1 at a frequency of 2.45 GHz.

[0116] Figure 12 This is a graph showing the frequency characteristics of the VSWR in Comparative Example 1 and Examples 1 to 4. Figure 12 In the diagram, the vertical axis represents VSWR, and the horizontal axis represents the signal frequency. For example... Figure 12As shown, Comparative Example 1 did not achieve satisfactory characteristics in both the first frequency band (5 GHz to 6 GHz) and the second frequency band (2.4 GHz to 2.5 GHz). In particular, in the first frequency band, the VSWR did not fall below the practical value of 2.0. On the other hand, in Examples 1 to 4, improvements in VSWR were observed compared to Comparative Example 1. Specifically, when comparing Examples 1 to 4, no significant differences were found in the second frequency band compared to Examples 1 to 4. However, in the first frequency band, the VSWR decreased significantly with the increase of the line width W1.

[0117] According to the results, by having a first line section 22 with a line width W1 that is wider than the width W10 of the first antenna element 8, the VSWR in the first frequency band can be reduced over a wide range.

[0118] Furthermore, when the line width W1 is changed, the VSWR of the second frequency band does not change significantly, while the VSWR of the first frequency band changes significantly. Based on this result, it can be concluded that by adjusting the line width W10, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the VSWR characteristics of the second frequency band.

[0119] • The impact of the second short pile line 30

[0120] The effect of a pair of second short stakes 30 on VSWR was verified using the model of antenna 1 according to the third embodiment. Furthermore, the dimensions of the model of antenna 1 according to the third embodiment are the same as those of the model of antenna 1 according to the first embodiment, except that it lacks the first short stake 28, the passive element 14, and the line width W1 of the line body 26. Example 5 is used below. Example 5: The line width W1 of the line body 26 is set to 5mm.

[0121] That is, the only difference between Example 4 and Example 5 is the presence or absence of a pair of second short stake lines 30. The effect of the pair of second short stake lines 30 was verified by comparing Example 4 and Example 5.

[0122] Figure 13 This is a Smith chart depicting the input impedance of the power supply point in Example 5. Figure 13 In the diagram, the impedance of Example 5 is represented by a solid line. The impedance of Example 4 is represented by a dashed line. Furthermore, the designation m11 indicates the impedance of Example 5 at a frequency of 2.45 GHz, and the designation m12 indicates the impedance of Example 5 at a frequency of 5.5 GHz. Figure 13 In the observation frequency around 2.45 GHz, no significant changes were observed between Example 5 and Example 4. On the other hand, in Figure 13In this case, if the portion above 5.5 GHz enclosed by circle E is magnified, the variation between Example 5 and Example 4 is larger than that around 2.45 GHz.

[0123] Figure 14 This is a graph showing the frequency characteristics of the VSWR in Example 5. Figure 14 In the diagram, the vertical axis represents VSWR, and the horizontal axis represents the signal frequency. Figure 14 In the diagram, the VSWR of Example 5 is represented by a solid line. The VSWR of Example 4 is represented by a dashed line. Figure 14 In, also with Figure 13 Similarly, the changes between Embodiment 5 and Embodiment 4 are almost non-existent in the second frequency band, but slightly present in the first frequency band.

[0124] Therefore, it can be seen that by setting the second short stake line 30, the VSWR in the first frequency band changes compared to the second frequency band. As a result, it can be seen that by setting the second short stake line 30 along the second antenna element 10, the VSWR characteristics of the first antenna element 8 in the first frequency band can change without causing a significant change in the VSWR characteristics in the second frequency band.

[0125] • The impact of the first short pile line 28

[0126] Using the model of antenna 1 according to the fourth embodiment, the effect of a pair of first short stake wires 28 on VSWR was verified. Furthermore, the dimensions of the model of antenna 1 according to the fourth embodiment are the same as those of the model of antenna 1 according to the first embodiment, except that it lacks the passive component 14 and the line width W1 of the line body 26. Example 6 is used below. Example 6: The line width W1 of the line body 26 is set to 5 mm.

[0127] That is, the only difference between Example 5 and Example 6 is the presence or absence of a pair of first short stake lines 28. The effect of the pair of first short stake lines 28 was verified by comparing Example 5 and Example 6.

[0128] Figure 15 This is a Smith chart depicting the input impedance of the power supply point in Example 6. Marker m13 indicates the impedance at a frequency of 2.45 GHz, and mark m14 indicates the impedance at a frequency of 5.5 GHz. Figure 15 In the observation frequency around 2.45 GHz, no significant changes were observed between Example 6 and Example 5. On the other hand, in Figure 15 In the observation of the frequency around 5.5 GHz, it can be seen that the shape of the line graph changes significantly compared with Example 5, and the impedance changes significantly between Example 6 and Example 5.

[0129] Figure 16 This is a graph showing the frequency characteristics of the VSWR in Example 6. Figure 16 In the diagram, the vertical axis represents VSWR, and the horizontal axis represents the signal frequency. Figure 16 In, also with Figure 15 Similarly, the changes between Embodiment 6 and Embodiment 5 are almost unchanged in the second frequency band, but slightly different in the first frequency band.

[0130] Therefore, it can be seen that by setting the first short stake line 28, the VSWR in the first frequency band changes compared to the second frequency band. Consequently, it can be seen that by setting the first short stake line 28, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the second frequency band.

[0131] • The influence of passive component 14

[0132] Using the model of antenna 1 of the first embodiment, the effect of passive component 14 on VSWR was verified. Furthermore, the dimensions of the model of antenna 1 of the first embodiment are as described above. The model of antenna 1 of the first embodiment is used as Example 7.

[0133] The line width W1 differs slightly between Embodiment 6 and Embodiment 7, but the presence or absence of the passive component 14 also differs. Therefore, the influence of the passive component 14 was verified by comparing Embodiment 6 and Embodiment 7.

[0134] Figure 17 This is a Smith chart depicting the input impedance of the power supply point in Example 7. Marker m15 indicates the impedance at a frequency of 2.45 GHz, and mark m16 indicates the impedance at a frequency of 5.5 GHz. Figure 17 In the observation frequency around 2.45 GHz, no significant changes were observed between Example 7 and Example 6. On the other hand, in Figure 17 In the observation of the frequency around 5.5 GHz, it can be seen that the shape of the line graph changes significantly compared with Example 6, and the impedance changes significantly between Example 7 and Example 6.

[0135] Figure 18 This is a graph showing the frequency characteristics of the VSWR in Example 7. Figure 18 In the diagram, the vertical axis represents VSWR, and the horizontal axis represents the signal frequency. Figure 18 In, also with Figure 17 Similarly, the changes between Embodiment 7 and Embodiment 6 are almost unchanged in the second frequency band, but change occurs in the first frequency band. Figure 18 In the first frequency band, the VSWR is below 1.5 across the entire region. Therefore, it is a VSWR lower than the practical VSWR value of 2.0, and according to Embodiment 7, it is possible to meet higher requirements for communication quality.

[0136] As can be seen from the above, by setting the passive component 14, the VSWR in the first frequency band changes compared to the second frequency band. Therefore, it can be seen that by setting the passive component 14, the VSWR characteristics of the first frequency band can be changed without causing a significant change in the second frequency band.

[0137] [End]

[0138] Furthermore, the embodiments disclosed herein should be considered illustrative rather than restrictive in all respects. The scope of the invention is defined not by the foregoing meaning, but by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0139] Explanation of reference numerals in the attached figures

[0140] 1 antenna

[0141] 2 Dielectric layer

[0142] 2a First page

[0143] 2a1 First Area

[0144] 2a2 Second Region

[0145] 2b Second Page

[0146] 2b1 Third Zone

[0147] 2b2 Fourth Zone

[0148] 4 First grounding conductor section

[0149] 4a margin

[0150] 6 Second grounding conductor section

[0151] 6a edge

[0152] 6b slit

[0153] 8 First antenna element

[0154] 8a First Antenna Element Main Body

[0155] 8a1 First element end

[0156] 8a2 Second Element End

[0157] 8a3 lateral edge

[0158] 8b Short-circuit conductor section

[0159] 8b1 side

[0160] 8b2 front edge

[0161] 10 Second-day antenna components

[0162] 10a Third element end

[0163] 10b Fourth element end

[0164] 10c second antenna component body

[0165] 10d short pile line section

[0166] 12 power supply lines

[0167] 14 passive components

[0168] 14a Fifth element end

[0169] 14b Sixth Element End

[0170] 16 First Through Hole

[0171] 18 Second Through Hole

[0172] 20 vias

[0173] 22 First Line Department

[0174] 24 Second Line Department

[0175] 24a Fine Line Section

[0176] 24b thick line section

[0177] 25 power supply points

[0178] Main body of Line 26

[0179] 26a First Intersection

[0180] 26b Second Cross Section

[0181] 26c lateral edge

[0182] 26d front edge

[0183] 26e overlapping part

[0184] 26f base edge

[0185] 28 First Short Stake Line

[0186] 30 Second Short Stake Line

[0187] S signal source

Claims

1. An antenna, comprising: Dielectric layer; A linear first antenna element is disposed on the first surface of the dielectric layer; A power supply line is disposed on a second surface of the dielectric layer opposite to the first surface, and has a power supply point; and The first via penetrates the dielectric layer and connects to the first antenna element and the power supply line. The power supply line includes a first line section, which is connected to the first via. The width of the first line section is wider than the width of the first antenna element.

2. The antenna according to claim 1, wherein, The power supply line also includes a second line section, which connects the power supply point and the first line section. The second line section is narrower than the line width of the first line section.

3. The antenna according to claim 1 or 2, wherein, The power supply line has the following features: The main body of the circuit has a crossing portion, which intersects with the first antenna element when viewed from the front of the dielectric layer; and A pair of first short stake lines extend from both sides of the intersection along the first antenna element.

4. The antenna according to claim 1 or 2, wherein, The antenna also includes a linear passive element that extends along the length of the first antenna element and is disposed on the first surface at a predetermined interval relative to the first antenna element.

5. The antenna according to claim 1, wherein, The first antenna element has an electrical length corresponding to the first frequency band. The antenna also features: A linear second antenna element extends along the length of the first antenna element and is disposed on the first surface at a predetermined interval relative to the first antenna element, having an electrical length corresponding to a second frequency band lower than the first frequency band; and The second via penetrates the dielectric layer and is connected to the second antenna element and the power supply line.

6. The antenna according to claim 5, wherein, The second antenna element is disposed at a predetermined interval from the side opposite to the side of the first antenna element that has a ground conductor portion.

7. The antenna according to claim 5, wherein, The power supply line has the following features: The main body of the circuit has a first intersection, which intersects with the first antenna element when viewed from the front of the dielectric layer; and A pair of first short stake lines extend from both sides of the first intersection along the first antenna element.

8. The antenna according to claim 5, wherein, The power supply line has the following features: The main body of the circuit has a second intersection, which intersects with the second antenna element when viewed from the front of the dielectric layer; and A pair of second short stake lines extend from both sides of the second intersection along the second antenna element.

9. The antenna according to claim 5, wherein, The antenna also includes a linear passive element, which is disposed on the first surface at a predetermined interval from the opposite side of the side of the first antenna element facing the second antenna element.

10. The antenna according to any one of claims 5 to 9, wherein, The first antenna element constitutes an inverted F-type antenna. The second antenna element forms an inverted L-shaped antenna.

11. The antenna according to claim 1, wherein, The first antenna element includes: The antenna element body is connected to the first via; and The short-circuit conductor section connects the ground conductor section, which is arranged parallel to the antenna element body, to one end of the antenna element body. The width of the first line section is wider than the width of the short-circuit conductor section.

12. The antenna according to claim 11, wherein, The first line portion has an overlapping portion, which overlaps with the short-circuit conductor portion when viewed from the front of the dielectric layer.

Images