Antenna device and antenna unit

Abstract

An antenna device (1) includes: a ground electrode plate (2); one or more first radiating electrode plates (3) opposite the ground electrode plate (2); a second radiating electrode plate (4) between the ground electrode plate (2) and the one or more first radiating electrode plates (3); one or more first power supply lines (L1) connected to the one or more first radiating electrode plates (3); a second power supply line (L2) not connected to the one or more first power supply lines (L1) but connected to the second radiating electrode plate (4); and a ground line (L3) not connecting the one or more first radiating electrode plates (3) to the ground electrode plate (2) but connecting the second radiating electrode plate (4) to the ground electrode plate (2). The one or more first radiating electrode plates (3) are located inside the second radiating electrode plate (4) when viewed in a thickness direction of the ground electrode plate (2).

Description

Technical Field

[0001] This disclosure relates to antenna devices and antenna elements. Background Technology

[0002] Patent Document 1 discloses a high-bandwidth multi-band antenna as an antenna device. The antenna of Patent Document 1 includes: a ground patch member; an additional patch member arranged substantially parallel to and spaced apart from the ground patch member and electrically connected by a radiating element; and a feed line capacitively coupled to the additional patch member.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2005-513844 Summary of the Invention

[0006] The problem the invention aims to solve

[0007] The antenna in Patent Document 1 has a three-dimensional structure, thus requiring a large space (volume) for its installation. Furthermore, depending on the frequency used in the antenna, its size may increase further. Therefore, when using the antenna in Patent Document 1, it is difficult to ensure sufficient space for other antennas within the device housing, resulting in situations where multiple antennas cannot be installed.

[0008] This disclosure provides antenna devices and antenna elements that can save space when multiple antennas are arranged.

[0009] Solution for solving the problem

[0010] An antenna device according to one embodiment of this disclosure includes: a ground electrode plate; one or more first radiating electrode plates opposite to the ground electrode plate; a second radiating electrode plate located between the ground electrode plate and the one or more first radiating electrode plates; one or more first power supply lines connected to the one or more first radiating electrode plates; a second power supply line connected to the second radiating electrode plate instead of the one or more first power supply lines; and a grounding wire connecting the second radiating electrode plate to the ground electrode plate instead of connecting the one or more first radiating electrode plates to the ground electrode plate. The one or more first radiating electrode plates are located inside the second radiating electrode plate when viewed from the thickness direction of the ground electrode plate.

[0011] An antenna element according to one embodiment of this disclosure includes: one or more first radiating electrode plates; a second radiating electrode plate opposite to the one or more first radiating electrode plates; a first power supply unit for connecting one or more first power supply lines to the one or more first radiating electrode plates; a second power supply unit for connecting second power supply lines to the second radiating electrode plate; and a grounding unit for grounding the second radiating electrode plate. The one or more first radiating electrode plates are located inside the second radiating electrode plate when viewed from a direction where the one or more first radiating electrode plates are opposite to the second radiating electrode plate.

[0012] The effects of the invention

[0013] According to the scheme disclosed herein, multiple antennas can be installed in a space-saving manner. Attached Figure Description

[0014] Figure 1 This is a perspective view of the structure of the antenna device according to Embodiment 1.

[0015] Figure 2 yes Figure 1 A top view of the antenna device.

[0016] Figure 3 yes Figure 2 A sectional view along line AA.

[0017] Figure 4 yes Figure 1 A bottom view of the second substrate of the antenna device.

[0018] Figure 5 yes Figure 1 A graph showing the frequency characteristics of the antenna device.

[0019] Figure 6 yes Figure 1 A graph showing the isolation characteristics of the antenna device.

[0020] Figure 7 This is a top view of an example of the structure of the antenna device according to Embodiment 2.

[0021] Figure 8 yes Figure 7 BB line section view.

[0022] Figure 9 This is an explanation Figure 7 A graph showing the variation of the resonant frequency of the antenna device.

[0023] Figure 10 This is a top view of an example of the structure of the antenna device according to Embodiment 3.

[0024] Figure 11 yes Figure 10 CC-line sectional view.

[0025] Figure 12 This is a top view of an example of the structure of the antenna device in Embodiment 4.

[0026] Figure 13 yes Figure 12 DD-line sectional view.

[0027] Figure 14 This is a cross-sectional view of an example of the structure of the antenna device according to Embodiment 5. Detailed Implementation

[0028] Hereinafter, embodiments will be described in detail with appropriate reference to the accompanying drawings. Positional relationships such as top, bottom, left, and right are based on those shown in the drawings unless otherwise specified. The drawings described in the following embodiments are schematic, and the ratios of the size and thickness of each component in each drawing may not reflect actual dimensional ratios. Furthermore, the dimensional ratios of each component are not limited to those shown in the accompanying drawings.

[0029] [1. Implementation Method]

[0030] [1.1 Implementation Method 1]

[0031] [1.1.1 Summary]

[0032] Figures 1-3 Antenna device 1, representing embodiment 1. In particular, Figure 1 This is a three-dimensional view of an example of the structure of antenna device 1. Figure 2 This is a top view of antenna device 1. Figure 3 yes Figure 2 A sectional view along line AA.

[0033] like Figure 1 As shown, the antenna device 1 includes: a ground electrode plate 2; one or more (three in the example) first radiating electrode plates 3, which are opposite to the ground electrode plate 2; and a second radiating electrode plate 4, which is located between the ground electrode plate 2 and the one or more first radiating electrode plates 3. Figure 1 and Figure 2 As shown, the antenna device 1 includes: one or more (three in the example) first power supply lines L1 connected to one or more first radiating electrode plates 3; and a second power supply line L2, which is not connected to one or more first power supply lines L1, but is connected to a second radiating electrode plate 4. Figure 3 As shown, the antenna device 1 includes a grounding wire L3, which connects a second radiating electrode plate 4 to the grounding electrode plate 2 instead of connecting one or more first radiating electrode plates 3 to the grounding electrode plate 2. The one or more first radiating electrode plates 3 are located inside the second radiating electrode plate 4 when viewed from the thickness direction of the grounding electrode plate 2.

[0034] like Figure 3 As shown, in antenna device 1, the second radiating electrode plate 4 faces the grounding electrode plate 2 and is connected to the grounding electrode plate 2 via a grounding wire L3. A second power supply line L2 is connected to the second radiating electrode plate 4. The second radiating electrode plate 4 and the grounding electrode plate 2 constitute a plate-shaped inverted-F antenna (PIFA). On the other hand, one or more (three in the example) first radiating electrode plates 3 face the second radiating electrode plate 4. The grounding wire L3 does not connect one or more first radiating electrode plates 3 to the grounding electrode plate 2, but rather connects the second radiating electrode plate 4 to the grounding electrode plate 2. Thus, for one or more (three in the example) first radiating electrode plates 3, the second radiating electrode plate 4 functions as a grounding element. Therefore, the first radiating electrode plates 3 and the second radiating electrode plate 4 constitute a planar antenna (e.g., a patch antenna). In other words, in antenna device 1, the plate-shaped inverted-F antenna and the planar antenna share the second radiating electrode plate 4. In other words, the second radiating electrode plate 4 serves as both the radiating electrode plate of the plate-shaped inverted F-type antenna and the grounding electrode plate of the planar antenna.

[0035] In antenna device 1, a planar antenna is constructed using a second radiating electrode plate 4 that forms a plate-shaped inverted F-type antenna. Furthermore, a first radiating electrode plate 3, which together with the second radiating electrode plate 4 forms the planar antenna, is located inside the second radiating electrode plate 4 when viewed from the thickness direction of the grounding electrode plate 2. Therefore, a planar antenna can be installed without increasing the size (planar dimensions) of the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the grounding electrode plate 2. Thus, according to the antenna device 1 of this embodiment, multiple antennas (plate-shaped inverted F-type antennas and planar antennas) can be installed in a space-saving manner.

[0036] [1.1.2 Details]

[0037] Hereinafter, the antenna device 1 of this embodiment will be described in further detail with reference to the accompanying drawings.

[0038] like Figure 1 As shown, the antenna device 1 includes a ground electrode plate 2, three first radiating electrode plates 3, and a second radiating electrode plate 4. The ground electrode plate 2, the three first radiating electrode plates 3, and the second radiating electrode plate 4 are used for wireless transmission or reception.

[0039] like Figures 1-3 As shown, the three first radiating electrode plates 3 are opposite to the grounding electrode plate 2. The second radiating electrode plate 4 is located between the grounding electrode plate 2 and the three first radiating electrode plates 3. In other words, the grounding electrode plate 2 and the three first radiating electrode plates 3 are located on opposite sides of each other with respect to the second radiating electrode plate 4.

[0040] The first radiating electrode plate 3, together with the second radiating electrode plate 4, constitutes a planar antenna. For example... Figures 1-3As shown, each of the first radiating electrode plates 3 is a plate-shaped electrode. Each of the first radiating electrode plates 3 is, for example, rectangular. The shape of the first radiating electrode plate 3 is set according to the frequency band of wireless communication using a planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4. In this embodiment, the first radiating electrode plate 3 corresponds to the frequency band of wireless communication via UWB.

[0041] The second radiating electrode plate 4, together with each of the first radiating electrode plates 3, constitutes a planar antenna. Furthermore, the second radiating electrode plate 4, together with the ground electrode plate 2, constitutes a plate-shaped inverted F-type antenna. The second radiating electrode plate 4 is a plate-shaped electrode. The shape of the second radiating electrode plate 4 is set according to the frequency band of wireless communication using the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the ground electrode plate 2. In this embodiment, the second radiating electrode plate 4 corresponds to the frequency band of wireless communication via Wi-Fi.

[0042] like Figure 3 As shown, the antenna device 1 includes: three first power supply lines L1 connected to three first radiating electrode plates 3; and a second power supply line L2 connected to a second radiating electrode plate 4 instead of the three first power supply lines L1. Furthermore, the antenna device 1 includes a grounding line L3, which connects the second radiating electrode plate 4 to the grounding electrode plate 2 instead of the first radiating electrode plate 3. The three first power supply lines L1 and the second power supply line L2 are connected, for example, to an external circuit.

[0043] like Figure 1 As shown, the antenna device 1 includes a first substrate 5 for arranging a ground electrode plate 2 and a second substrate 6 for arranging three first radiating electrode plates 3 and two second radiating electrode plates 4. Figure 3 As shown, the antenna device 1 includes a first connector 71 and a second connector 72 that are detachably connected to each other. The first connector 71 and the second connector 72 are provided for electrical connection between the first substrate 5 and the second substrate 6, as detailed below.

[0044] In antenna device 1, a second substrate 6 and a second connector 72, which are provided with three first radiating electrode plates 3 and two second radiating electrode plates 4, constitute antenna element 10. Antenna element 10 is connected to a first substrate 5 on which a ground electrode plate 2 is provided to obtain antenna device 1. That is, antenna element 10 is connected to the first substrate 5 by connecting the second connector 72 of antenna element 10 to the first connector 71 provided on the first substrate 5, thereby forming antenna device 1.

[0045] like Figure 1 and Figure 2 As shown, a grounding electrode plate 2 and a first connector 71 are disposed on the first substrate 5. The first substrate 5 is rectangular. Figure 3As shown, on one side of the first substrate 5 in the thickness direction ( Figure 3 The upper surface (hereinafter referred to as the main surface) is provided with a grounding electrode plate 2 and a first connector 71.

[0046] The grounding electrode plate 2 is a plate-shaped electrode. The potential of the grounding electrode plate 2 is set to ground potential when using the antenna device 1. The grounding electrode plate 2 is connected, for example, to a grounding component of an external circuit. The grounding electrode plate 2 covers, for example, the entire main surface of the first substrate 5 except for the portion configured for the first connector 71.

[0047] like Figure 3 As shown, the second substrate 6 is arranged at a distance from the first substrate 5. Figure 1 and Figure 2 As shown, three first radiating electrode plates 3, two second radiating electrode plates 4, and a second connector 72 are disposed on the second substrate 6. Figure 3 As shown, the three first radiating electrode plates 3 are disposed on the side of the second substrate 6 opposite to the first substrate 5. Figure 3 The upper surface of the substrate). The second radiating electrode plate 4 is disposed on the surface of the second substrate 6 on the side of the first substrate 5. Figure 3 (the lower surface of the middle).

[0048] like Figure 1 and Figure 2 As shown, the second substrate 6 has an electrode arrangement section 61, a connector arrangement section 62, and a connection section 63.

[0049] Three first radiating electrode plates 3 and two second radiating electrode plates 4 are disposed in the electrode arrangement section 61. More specifically, the three first radiating electrode plates 3 are disposed on the first surface 61a of the electrode arrangement section 61 on the side opposite to the first substrate 5. Figure 3 The upper surface of the electrode assembly 61). The second radiation electrode plate 4 is disposed on the second surface 61b of the electrode assembly 61 on the side of the first substrate 5. Figure 3 (the lower surface of the middle).

[0050] like Figure 1 and Figure 2 As shown, the electrode arrangement section 61 is L-shaped when viewed from above. The electrode arrangement section 61 has a first part 611 and a second part 612. The first part 611 is rectangular. Two first radiating electrode plates 3 are arranged in the first part 611. One first radiating electrode plate 3 is arranged in the second part 612.

[0051] like Figure 2 As shown, the two first radiating electrode plates 3 are located in the length direction of the first part 611. Figure 2 The second part 612 is arranged in a direction that intersects the direction in which the two first radiation electrode plates 3 arranged in the first part 611 are arranged (in the left-right direction). Figure 2 The second part 612 protrudes from the first part 611 in the vertical direction. More specifically, the second part 612 protrudes from the first part 611 in the width direction (in the vertical direction). Figure 2 The first end of the first part 611 (in the vertical direction) is located along the length direction of the first part 611. Figure 2 The first end protrudes (in the left-right direction). The second part 612 is rectangular.

[0052] like Figure 2 As shown, the three first radiating electrode plates 3 are arranged in an L-shape on the first surface 61a of the electrode arrangement section 61 when viewed from the thickness direction of the ground electrode plate 2. Thus, in the antenna device 1, the three first radiating electrode plates 3 are arranged such that two first radiating electrode plates 3 are arranged in a first direction (e.g., the length direction of the first portion 611) and a second direction (e.g., the width direction of the first portion 611) that are orthogonal to and mutually orthogonal to the thickness direction of the ground electrode plate 2. Therefore, the reception angle (AoA) can be detected in both the first and second directions.

[0053] Figure 4 This is a bottom view of the second substrate 6 of antenna device 1. (Example) Figure 4 As shown, the second radiation electrode plate 4 is arranged to cover the entire second surface 61b of the electrode arrangement section 61. Therefore, as Figure 4 As shown, the three first radiating electrode plates 3 are located inside the second radiating electrode plate 4 when viewed from the thickness direction of the grounding electrode plate 2.

[0054] A second connector 72 is configured in connector configuration section 62. For example... Figure 1 and Figure 2 As shown, the connector configuration section 62 is arranged with the second section 612 in the direction in which the two first radiating electrode plates 3 disposed on the first section 611 are arranged. Furthermore, the connector configuration section 62 is located in the width direction of the first section 611 (…). Figure 2 The first end (in the vertical direction) and the first part 611 in the length direction (in the vertical direction) Figure 2 The second end sides (in the left and right directions) are opposite each other. The connector configuration part 62 is rectangular plate-shaped.

[0055] The connecting part 63 connects the electrode mounting part 61 to the connector mounting part 62. For example... Figure 1 and Figure 2 As shown, the connecting portion 63 connects the connector mounting portion 62 to the first portion 611. The connecting portion 63 is elongated. The connecting portion 63 is flexible. The flexibility of the connecting portion 63 makes it easier to connect the second connector 72 relative to the first connector 71, and also allows for the reliable connection of the second connector 72 and the first connector 71 to absorb dimensional errors.

[0056] The first connector 71 is disposed on the first substrate 5 and connected to three first power supply lines L1 and a ground line L3. The second connector 72 is disposed on the second substrate 6 and connected to three first radiating electrode plates 3 and two radiating electrode plates 4. For example, the second connector 72 is constructed using... Figure 1 and Figure 2 The power supply wiring L11 shown is connected to each of the three first radiating electrode plates 3. In this embodiment, the first connector 71 and the second connector 72 are connected, thereby connecting the three first power supply lines L1 to the three first radiating electrode plates 3, and the grounding wire L3 to the second radiating electrode plate 4. In this embodiment, the second connector 72 constitutes a first power supply section for connecting the three first power supply lines L1 to the three first radiating electrode plates 3 and a grounding section for connecting the grounding member to the second radiating electrode plate 4. In this embodiment, the grounding section is used to ground the second radiating electrode plate 4 by connecting the grounding wire L3 to the second radiating electrode plate 4.

[0057] like Figure 3 As shown, the antenna device 1 includes a protective film 20 protecting the grounding electrode plate 2 and a protective film 40 protecting the second radiating electrode plate 4. Furthermore, in Figure 1 and Figure 2 The illustrations of protective films 20 and 40 have been omitted for ease of understanding of the description in the attached drawings.

[0058] A protective film 20 is disposed on the side of the grounding electrode plate 2 opposite to the first substrate 5. The protective film 20 completely covers the grounding electrode plate 2. The protective film 20 is electrically insulating.

[0059] A protective film 40 is disposed on the side of the second radiating electrode plate 4 opposite to the second substrate 6. The protective film 40 completely covers the second radiating electrode plate 4. The protective film 40 has electrical insulation properties. In this embodiment, as... Figure 3 and Figure 4 As shown, the protective film 40 has an opening 40a that partially exposes the second radiating electrode plate 4. The portion of the second radiating electrode plate 4 exposed through the opening 40a constitutes a second power supply section 4a for connecting the second power supply line L2 to the second radiating electrode plate 4. The second power supply section 4a is the connection point between the second power supply line L2 and the second radiating electrode plate 4.

[0060] In this embodiment, the second power supply line L2 is a conductive lead. For example... Figure 3As shown, one end of the second power supply line L2 is brought into contact with the second power supply section 4a of the second radiating electrode plate 4 via the opening 40a, thereby connecting the second power supply line L2 to the second radiating electrode plate 4. The second power supply section 4a defines the power supply point of the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the ground electrode plate 2. As described above, the second radiating electrode plate 4 corresponds to the frequency band of wireless communication via Wi-Fi. The position of the second power supply section 4a is set such that resonance in the frequency band of wireless communication via Wi-Fi becomes easier. More specifically, as... Figure 4 As shown, when viewed from the thickness direction of the grounding electrode plate 2, the distance d between the second power supply section 4a (i.e., the connection point between the second power supply line L2 and the second radiating electrode plate 4) and the end 41 of the second radiating electrode plate 4 is set according to the frequency used in wireless communication using the second radiating electrode plate 4. Here, the end 41 is the end of the second radiating electrode plate 4 located on the opposite side from the connection point (second connector 72) between the grounding line L3 and the second radiating electrode plate 4, relative to the connection point (second power supply section 4a) between the second power supply line L2 and the second radiating electrode plate 4, when viewed from the thickness direction of the grounding electrode plate 2. The frequency bands for wireless communication via Wi-Fi include a band around 2.4 GHz (e.g., 2.4 GHz to 2.5 GHz) and a band around 5 GHz (e.g., 5.15 GHz to 5.8 GHz). The distance d is, for example, 1 / 4 of the wavelength corresponding to the band around 5 GHz. In other words, the distance d can be 1 / 4 of the wavelength corresponding to the highest frequency band among one or more frequency bands used in wireless communication using the second radiating electrode plate 4. According to this structure, the characteristics for the highest frequency band among one or more frequencies used in wireless communication using the second radiating electrode plate 4 can be improved.

[0061] [1.1.3 Evaluation]

[0062] As described above, the antenna device 1 includes two types of antennas: a planar antenna (e.g., a patch antenna) composed of a first radiating electrode plate 3 and a second radiating electrode plate 4, and a plate-shaped inverted-F antenna (PIFA) composed of a second radiating electrode plate 4 and a ground electrode plate 2. The planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4 is used for wireless communication via UWB, and the plate-shaped inverted-F antenna composed of the second radiating electrode plate 4 and the ground electrode plate 2 is used for wireless communication via Wi-Fi.

[0063] Figure 5This is a graph showing the frequency characteristics of antenna device 1. The frequency characteristics are evaluated using S-parameters. G1 is a graph showing the input and output S-parameters of a planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4. G2 is a graph showing the input and output S-parameters of a plate-shaped inverted F-type antenna composed of the second radiating electrode plate 4 and the ground electrode plate 2. According to... Figure 5 It can be clearly known that the planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4 and the plate-shaped inverted F-type antenna composed of the second radiating electrode plate 4 and the grounding electrode plate 2 have the characteristic of resonating in different frequency bands.

[0064] Figure 6 This is a graph representing the isolation characteristics of antenna device 1. The isolation characteristics are a graph of S-parameters between the planar antenna formed by the first radiating electrode plate 3 and the second radiating electrode plate 4, and the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the ground electrode plate 2. According to... Figure 6 It can be clearly understood that the isolation between the planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4 and the plate-shaped inverted F-type antenna composed of the second radiating electrode plate 4 and the grounding electrode plate 2 can be fully ensured.

[0065] [1.1.4 Effects, etc.]

[0066] The antenna device 1 described above includes: a ground electrode plate 2; one or more first radiating electrode plates 3 opposite to the ground electrode plate 2; a second radiating electrode plate 4 located between the ground electrode plate 2 and the one or more first radiating electrode plates 3; one or more first power supply lines L1 connected to the one or more first radiating electrode plates 3; a second power supply line L2 connected to the second radiating electrode plate 4 instead of the one or more first power supply lines L1; and a grounding line L3 connecting the second radiating electrode plate 4 to the ground electrode plate 2 instead of connecting the one or more first radiating electrode plates 3 to the ground electrode plate 2. The one or more first radiating electrode plates 3 are located inside the second radiating electrode plate 4 when viewed from the thickness direction of the ground electrode plate 2. With this structure, multiple antennas can be installed in a space-saving manner.

[0067] The antenna device 1 includes: a first substrate 5 on which a grounding electrode plate 2 is disposed; and a second substrate 6 disposed at a distance from the first substrate 5, on which one or more first radiating electrode plates 3 and second radiating electrode plates 4 are disposed. According to this structure, multiple antennas can be installed in a space-saving manner.

[0068] In the antenna device 1, one or more first radiating electrode plates 3 are disposed on the side of the second substrate 6 opposite to the first substrate 5. Second radiating electrode plates 4 are disposed on the side of the second substrate 6 opposite to the first substrate 5. With this structure, multiple antennas can be installed in a space-saving manner.

[0069] Antenna device 1 includes a first connector 71 and a second connector 72 that are detachably connected to each other. The first connector 71 is disposed on a first substrate 5 and connected to one or more first power supply lines L1 and ground lines L3. The second connector 72 is disposed on a second substrate 6 and connected to one or more first radiating electrode plates 3 and second radiating electrode plates 4. According to this structure, connecting the first connector 71 and the second connector 72 connects one or more first power supply lines L1 to one or more first radiating electrode plates 3 and connects the ground line L3 to the second radiating electrode plate 4. Therefore, the assembly of antenna device 1 becomes easy.

[0070] In the antenna device 1, the second substrate 6 has: an electrode arrangement section 61 for arranging one or more first radiating electrode plates 3 and second radiating electrode plates 4; a connector arrangement section 62 for arranging a second connector 72; and a flexible connection section 63 for connecting the electrode arrangement section 61 and the connector arrangement section 62. According to this structure, the assembly of the antenna device 1 becomes easy.

[0071] In the antenna device 1, the electrode arrangement section 61 includes: a first portion 611 for at least two first radiating electrode plates 3; and a second portion 612 protruding from the first portion 611 in a direction intersecting the arrangement direction of the at least two first radiating electrode plates 3 arranged in the first portion 611, for at least one first radiating electrode plate 3. A connector arrangement section 62 is arranged with the second portion 612 in the same direction as the arrangement of the at least two first radiating electrode plates 3 arranged in the first portion 611. A connecting portion 63 connects the connector arrangement section 62 to the first portion 611. According to this structure, even if multiple first radiating electrode plates 3 are provided, the size of the second substrate 6 can be reduced.

[0072] In the antenna device 1, the second radiating electrode plate 4 has an end 41 located on the opposite side of the connection point (second power supply section 4a) between the second power supply line L2 and the second radiating electrode plate 4, as viewed from the thickness direction of the ground electrode plate 2. The distance d between the connection point (second power supply section 4a) between the second power supply line L2 and the second radiating electrode plate 4 and the end 41 is 1 / 4 of the wavelength corresponding to the highest frequency among the more than one frequency band used in wireless communication using the second radiating electrode plate 4. According to this structure, the characteristics for the highest frequency among the more than one frequency band used in wireless communication using the second radiating electrode plate 4 can be improved.

[0073] In the antenna device 1, one or more first radiating electrode plates 3 are arranged such that two or more first radiating electrode plates 3 are arranged in a first direction and a second direction, which are orthogonal to and mutually orthogonal to the thickness direction of the ground electrode plate 2. According to this structure, the receiving angle can be detected in the first direction and the second direction respectively.

[0074] In the antenna device 1, one or more first radiating electrode plates 3 include three first radiating electrode plates 3 arranged in an L-shape when viewed from the thickness direction of the ground electrode plate 2. According to this structure, even if the receiving angle can be detected separately in the first direction and the second direction, miniaturization and reduction of manufacturing cost can be achieved.

[0075] In antenna device 1, one or more first radiating electrode plates 3 correspond to the frequency band for wireless communication via UWB. Second radiating electrode plates 4 correspond to the frequency band for wireless communication via Wi-Fi. With this structure, both wireless communication via UWB and wireless communication via Wi-Fi can be achieved.

[0076] The antenna unit 10 described above includes: one or more first radiating electrode plates 3; a second radiating electrode plate 4 opposite to the one or more first radiating electrode plates 3; a first power supply section (second connector 72) for connecting one or more first power supply lines L1 to one or more first radiating electrode plates 3; a second power supply section 4a for connecting a second power supply line L2 to the second radiating electrode plate 4; and a grounding section (second connector 72) for connecting the second radiating electrode plate 4 to a grounding element. The one or more first radiating electrode plates 3 are located inside the second radiating electrode plate 4 when viewed from a direction where the one or more first radiating electrode plates 3 and the second radiating electrode plate 4 are opposite each other. With this structure, multiple antennas can be arranged in a space-saving manner.

[0077] [1.2 Implementation Method 2]

[0078] Figure 7 and Figure 8 This section illustrates a structural example of the antenna device 1A according to Embodiment 2. Figure 7 This is a top view of antenna device 1A. Figure 8 yes Figure 7 BB line section view.

[0079] like Figure 7 and Figure 8 As shown, antenna device 1A differs from antenna device 1 in that it includes the protrusion 21.

[0080] The protrusion 21 is provided to adjust the resonant frequency of the antenna (plate-shaped inverted F-type antenna) formed by the second radiating electrode plate 4 and the ground electrode plate 2. The protrusion 21 extends from the ground electrode plate 2 toward the second radiating electrode plate 4. The protrusion 21 is conductive. The protrusion 21 extends along the length direction of the first portion 611 of the second substrate 6. The protrusion 21 is connected to the ground electrode plate 2 and is set to ground potential in the same manner as the ground electrode plate 2. In particular, when viewed from the thickness direction of the ground electrode plate 2, the protrusion 21 is located on the opposite side of the connection point (second power supply portion 4a) between the second power supply line L2 and the second radiating electrode plate 4, as opposed to the connection point (second connector 72) between the ground line L3 and the second radiating electrode plate 4. In the second radiating electrode plate 4, the portion located on the opposite side of the second connector 72 relative to the second power supply portion 4a is a resonant portion, and due to the presence of the protrusion 21, the degree of coupling (capacitance) between the resonant portion of the second radiating electrode plate 4 and the ground electrode plate 2 changes. For example, by increasing the height of the protrusion 21, the coupling (capacitance) between the resonant portion of the second radiating electrode plate 4 and the grounding electrode plate 2 becomes stronger, thereby lowering the resonant frequency. By adjusting the height of the protrusion 21, the resonant frequency of the antenna formed by the second radiating electrode plate 4 and the grounding electrode plate 2 can be adjusted.

[0081] Figure 9 This is a graph illustrating the change in the resonant frequency of antenna device 1A. Figure 9 In the diagram, G3 represents the frequency characteristics (S-parameters) of antenna device 1 excluding protrusion 21, and G4 represents the frequency characteristics (S-parameters) of antenna device 1A including protrusion 21. According to G3 and G4, it is clear that the peak positions change near 2.4 GHz and 5 GHz. Therefore, it can be concluded that by providing protrusion 21, the resonant frequency of the antenna (plate-shaped inverted F-type antenna) composed of the second radiating electrode plate 4 and the grounding electrode plate 2 can be adjusted.

[0082] When the protrusion 21 is provided, it protrudes from the grounding electrode plate 2, but the second radiating electrode plate 4 itself remains unchanged. That is, the size of the second radiating electrode plate 4 remains the same. This means that the grounding state observed from the antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4 is unchanged. Therefore, even with the protrusion 21 provided, the frequency characteristics of the planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4 are not affected.

[0083] As described above, the antenna device 1A includes a protrusion 21 extending from the ground electrode plate 2 toward the second radiating electrode plate 4. According to this structure, the protrusion 21 allows adjustment of the resonant frequency of the antenna formed by the second radiating electrode plate 4 and the ground electrode plate 2 without affecting the frequency characteristics of the antenna formed by one or more first radiating electrode plates 3 and second radiating electrode plates 4.

[0084] In antenna device 1A, when viewed from the thickness direction of the ground electrode plate 2, the protrusion 21 is located on the opposite side from the connection point (second power supply section 4a) between the second power supply line L2 and the second radiating electrode plate 4. According to this structure, the effect of adjusting the frequency characteristics of the antenna composed of the second radiating electrode plate 4 and the ground electrode plate 2 using the protrusion 21 can be increased.

[0085] [1.3 Implementation Method 3]

[0086] Figure 10 and Figure 11 This illustrates a structural example of the antenna device 1B according to Embodiment 3. Figure 10 This is a top view of antenna device 1B. Figure 11 yes Figure 10 CC-line sectional view.

[0087] like Figure 10 and Figure 11 As shown, antenna device 1B differs from antenna device 1 in the structure of the second power supply line L2. More specifically, in antenna device 1, the second power supply line L2 is a conductive lead independent of the second radiating electrode plate 4, but in antenna device 1B, the second power supply line L2 and the second radiating electrode plate 4 are continuously integrated. That is, there is no seam between the second power supply line L2 and the second radiating electrode plate 4; the second power supply line L2 and the second radiating electrode plate 4 form a single component. In this embodiment, the second power supply line L2 is formed by bending a portion 4b of the plate constituting the second radiating electrode plate 4.

[0088] In this embodiment, such as Figure 10 and Figure 11 As shown, the second substrate 6 includes an opening 6a. The opening 6a is, for example, rectangular. The opening 6a is located, for example, at a first portion 611 of the electrode arrangement portion 61 of the second substrate 6 between two first radiating electrode plates 3. After the plate constituting the second radiating electrode plate 4 is disposed on the electrode arrangement portion 61 of the second substrate 6, a portion 4b of the plate is bent using the opening 6a of the second substrate 6, thereby forming a second power supply line L2. In this way, the second power supply line L2 is formed continuously and integrally with the second radiating electrode plate 4. Therefore, the second power supply line L2 can be easily formed.

[0089] As described above, in antenna device 1B, the second power supply line L2 is formed by bending a portion 4b of the plate that constitutes the second radiating electrode plate 4. This structure allows for a reduction in manufacturing costs.

[0090] [1.4 Implementation Method 4]

[0091] Figure 12 and Figure 13 This illustrates a structural example of the antenna device 1C according to Embodiment 4. Figure 12 This is a top view of antenna device 1C. Figure 13 yes Figure 12 DD-line sectional view.

[0092] like Figure 12 and Figure 13 As shown, antenna device 1C differs from antenna device 1 in that it includes the third radiating electrode plate 8.

[0093] like Figure 12 and Figure 13 As shown, the third radiating electrode plate 8 is opposite to the predetermined first radiating electrode plate 3a. The predetermined first radiating electrode plate 3a is the first radiating electrode plate 3 disposed at the second portion 612 of the second substrate 6, which is one of the three first radiating electrode plates 3 disposed on the second substrate 6.

[0094] like Figure 13 As shown, the predetermined first radiating electrode plate 3a is connected to the second substrate 6 via the second grounding line L5. The second grounding line L5 is, for example, formed by wiring through holes in the second substrate 6. The predetermined first radiating electrode plate 3a is connected to the first power supply line L1 via the first connector 71 and the second connector 72.

[0095] like Figure 13 As shown, the third radiating electrode plate 8 is arranged opposite to the predetermined first radiating electrode plate 3a. In this embodiment, a third substrate 91 is disposed between the third radiating electrode plate 8 and the predetermined first radiating electrode plate 3a. Thus, the third radiating electrode plate 8 and the predetermined first radiating electrode plate 3a are opposite to each other through the third substrate 91. The third radiating electrode plate 8 is connected to the second connector 72 via a power supply wiring L6. The power supply wiring L6 is, for example, formed by wiring patterns on the second substrate 6 and through-hole wiring on the third substrate 91. The size of the third radiating electrode plate 8 is smaller than the size of the predetermined first radiating electrode plate 3a. The third radiating electrode plate 8 utilizes wireless communication in a frequency band higher than that used for wireless communication with the predetermined first radiating electrode plate 3a. The frequency band used for wireless communication with the predetermined first radiating electrode plate 3a is, for example, a frequency band around 6.5 GHz or 8 GHz, while the frequency band used for wireless communication with the third radiating electrode plate 8 is, for example, a frequency band around 10 GHz. Figure 12As shown, the third radiating electrode plate 8 is located inside the predetermined first radiating electrode plate 3a when viewed from the thickness direction of the grounding electrode plate 2.

[0096] like Figure 13 As shown, the antenna device 1C includes: a third power supply line L4, which is not connected to the first power supply line L1 and the second power supply line L2, but is connected to the third radiating electrode plate 8; and a second ground line L5, which connects the predetermined first radiating electrode plate 3a to the second radiating electrode plate 4. In this embodiment, the first connector 71 is disposed on the first substrate 5 and is connected to the third power supply line L4 in addition to being connected to the three first power supply lines L1 and the ground line L3. The third power supply line L4 is connected to the power supply wiring line L6 via the first connector 71 and the second connector 72, thereby connecting to the third radiating electrode plate 8.

[0097] As described above, the antenna device 1C includes: a third radiating electrode plate 8, which is opposite to one of the three first radiating electrode plates 3, a predetermined first radiating electrode plate 3a; a third power supply line L4, which is not connected to the three first power supply lines L1 and the second power supply line L2, but is connected to the third radiating electrode plate 8; and a second grounding line L5, which connects the predetermined first radiating electrode plate 3a to the second radiating electrode plate 4. The third radiating electrode plate 8 is located inside the predetermined first radiating electrode plate 3a when viewed from the thickness direction of the grounding electrode plate 2.

[0098] like Figure 13 As shown, in antenna device 1C, a predetermined first radiating electrode plate 3a faces a second radiating electrode plate 4 and is connected to the second radiating electrode plate 4 via a second grounding line L5. A first power supply line L1 is connected to the predetermined first radiating electrode plate 3a. The predetermined first radiating electrode plate 3a and the second radiating electrode plate 4 do not constitute a planar antenna, but rather constitute a plate-shaped inverted F-type antenna (PIFA). On the other hand, a third radiating electrode plate 8 faces the predetermined first radiating electrode plate 3a. The second grounding line L5 does not connect the third radiating electrode plate 8 to the second radiating electrode plate 4, but instead connects the predetermined first radiating electrode plate 3a to the second radiating electrode plate 4. Thus, the predetermined first radiating electrode plate 3a functions as a grounding element for the third radiating electrode plate 8. Therefore, the third radiating electrode plate 8 and the predetermined first radiating electrode plate 3a constitute a planar antenna (e.g., a patch antenna). In other words, in antenna device 1C, the plate-shaped inverted F-type antenna and the planar antenna share the predetermined first radiating electrode plate 3a. In other words, the predetermined first radiating electrode plate 3a serves as both the radiating electrode plate of the plate-shaped inverted F-type antenna and the grounding electrode plate of the planar antenna.

[0099] In the antenna device 1C, a planar antenna is constructed using a predetermined first radiating electrode plate 3a that constitutes a plate-shaped inverted F-type antenna. Furthermore, a third radiating electrode plate 8, which together with the predetermined first radiating electrode plate 3a forms the planar antenna, is located inside the predetermined first radiating electrode plate 3a when viewed from the thickness direction of the ground electrode plate 2. Therefore, a planar antenna can be installed without increasing the size (planar size) of the plate-shaped inverted F-type antenna constructed from the predetermined first radiating electrode plate 3a and the second radiating electrode plate 4. Thus, according to the antenna device 1C of this embodiment, multiple antennas (plate-shaped inverted F-type antennas and planar antennas) can be installed in a space-saving manner.

[0100] As described above, the antenna device 1C includes: one or more third radiating electrode plates 8, which are opposite to one or more predetermined first radiating electrode plates 3a among one or more first radiating electrode plates 3; one or more third power supply lines L4, which are not connected to one or more first power supply lines L1 and second power supply lines L2, but are connected to one or more third radiating electrode plates 8; and one or more second grounding lines L5, which connect one or more predetermined first radiating electrode plates 3a to second radiating electrode plates 4. The one or more third radiating electrode plates 8 are located inside one or more predetermined first radiating electrode plates 3a when viewed from the thickness direction of the grounding electrode plate 2. According to this structure, multiple antennas can be arranged in a space-saving manner.

[0101] [1.5 Implementation Method 5]

[0102] Figure 14 This is a cross-sectional view of an example structure of antenna device 1D according to embodiment 5. Antenna device 1D differs from antenna device 1 in that it is constructed using a multilayer substrate. Examples of multilayer substrates include low-temperature co-fired ceramic (LTCC) multilayer substrates, multilayer resin substrates formed by stacking multiple resin layers composed of resins such as epoxy and polyimide, multilayer resin substrates formed by stacking multiple resin layers composed of liquid crystal polymers (LCPs) with lower dielectric constants, multilayer resin substrates formed by stacking multiple resin layers composed of fluorine-based resins, and ceramic multilayer substrates other than LTCC.

[0103] like Figure 14 As shown, antenna device 1D, like antenna device 1, includes a ground electrode plate 2, a plurality of first radiating electrode plates 3, and a second radiating electrode plate 4. The ground electrode plate 2, the plurality of first radiating electrode plates 3, and the second radiating electrode plate 4 are used for wireless transmission or reception.

[0104] The first radiating electrode plate 3 is opposite to the grounding electrode plate 2. The second radiating electrode plate 4 is located between the grounding electrode plate 2 and the three first radiating electrode plates 3. That is, the grounding electrode plate 2 and the three first radiating electrode plates 3 are located on opposite sides of each other with respect to the second radiating electrode plate 4.

[0105] The first radiating electrode plate 3, together with the second radiating electrode plate 4, constitutes a planar antenna. Each first radiating electrode plate 3 is, for example, a plate-shaped electrode. Each first radiating electrode plate 3 is, for example, rectangular. The shape of the first radiating electrode plate 3 is set according to the frequency band of wireless communication using the planar antenna composed of the first radiating electrode plate 3 and the second radiating electrode plate 4. The first radiating electrode plate 3, for example, corresponds to the frequency band of wireless communication via UWB.

[0106] The second radiating electrode plate 4 and each of the first radiating electrode plates 3 constitute a planar antenna. Furthermore, the second radiating electrode plate 4, together with the ground electrode plate 2, constitutes a plate-shaped inverted F-type antenna. The second radiating electrode plate 4 is a plate-shaped electrode. The shape of the second radiating electrode plate 4 is set according to the frequency band of wireless communication using the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the ground electrode plate 2. For example, the second radiating electrode plate 4 corresponds to the frequency band of wireless communication via Wi-Fi.

[0107] like Figure 14 As shown, the antenna device 1D includes a first substrate 101, a dielectric layer 102, and a second substrate 103. A ground electrode plate 2 is disposed on the surface of the first substrate 101 on the side of the second substrate 103. Figure 14 The upper surface of the substrate). A plurality of first radiating electrode plates 3 are disposed on the side of the second substrate 103 opposite to the first substrate 101. Figure 14 The upper surface of the second substrate 103). The second radiating electrode plate 4 is disposed on the surface of the second substrate 103 on the side of the first substrate 101. Figure 14 (The lower surface of the substrate). The dielectric layer 102 is located between the first substrate 101 and the second substrate 103.

[0108] like Figure 14 As shown, the antenna device 1D includes: a plurality of first power supply lines L1 connected to a plurality of first radiating electrode plates 3; a second power supply line L2 connected to a second radiating electrode plate 4 instead of the plurality of first power supply lines L1; and a ground line L3 connected to a second radiating electrode plate 4 instead of connecting the first radiating electrode plate 3 to a ground electrode plate 2. The first power supply lines L1 are, for example, vias penetrating the second substrate 103 and extending to a predetermined depth in the dielectric layer 102. The second power supply line L2 is, for example, a via extending to a predetermined depth in the dielectric layer 102. The ground line L3 is, for example, a via penetrating the dielectric layer 102. The first power supply lines L1 and L2 are connected to an external circuit, for example, using electrodes provided in the dielectric layer 102.

[0109] like Figure 14As shown, in antenna device 1D, similar to antenna device 1, the second radiating electrode plate 4 faces the grounding electrode plate 2 and is connected to the grounding electrode plate 2 via a grounding wire L3. A second power supply line L2 is connected to the second radiating electrode plate 4. The second radiating electrode plate 4 and the grounding electrode plate 2 constitute a plate-shaped inverted F-type antenna (PIFA). On the other hand, the first radiating electrode plate 3 faces the second radiating electrode plate 4. The grounding wire L3 does not connect the first radiating electrode plate 3 to the grounding electrode plate 2, but rather connects the second radiating electrode plate 4 to the grounding electrode plate 2. Thus, the second radiating electrode plate 4 functions as a grounding element for the first radiating electrode plate 3. Therefore, the first radiating electrode plate 3 and the second radiating electrode plate 4 constitute a planar antenna (e.g., a patch antenna).

[0110] In antenna device 1D, a planar antenna is constructed using a second radiating electrode plate 4 that forms a plate-shaped inverted F-type antenna. Furthermore, a first radiating electrode plate 3, which together with the second radiating electrode plate 4 forms the planar antenna, is located inside the second radiating electrode plate 4 when viewed from the thickness direction of the grounding electrode plate 2. Therefore, a planar antenna can be installed without increasing the size (planar dimensions) of the plate-shaped inverted F-type antenna formed by the second radiating electrode plate 4 and the grounding electrode plate 2. Thus, according to antenna device 1D, multiple antennas (plate-shaped inverted F-type antennas and planar antennas) can be installed in a space-saving manner.

[0111] [2. Variations]

[0112] The embodiments disclosed herein are not limited to the embodiments described above. Various modifications can be made to the above embodiments based on design, etc., as long as they solve the problems of this disclosure. Hereinafter, variations of the above embodiments are listed. The variations described below can be appropriately combined and applied.

[0113] In a variation, the shapes of the constituent elements of antenna devices 1, 1A to 1D are not particularly limited. The first radiating electrode plate 3 does not necessarily have to be rectangular; for example, it can be a known shape suitable for planar antennas. The shape of the second radiating electrode plate 4 is also not limited to the shape illustrated in the above embodiments. Regarding the shapes of the first radiating electrode plate 3 and the second radiating electrode plate 4, it is sufficient that the first radiating electrode plate 3 is located inside the second radiating electrode plate 4 when viewed from the thickness direction of the grounding electrode plate 2. This also applies to the shapes of the third radiating electrode plate 8 and the predetermined first radiating electrode plate 3a.

[0114] In one variation, the number of first radiating electrode plates 3 is not particularly limited. The antenna device 1 may, for example, include one first radiating electrode plate 3. When the antenna device 1 includes multiple first radiating electrode plates 3, the multiple first radiating electrode plates 3 may be arranged in a manner where two or more first radiating electrode plates 3 are arranged in a first direction and a second direction, which are orthogonal to and mutually orthogonal to the thickness direction of the ground electrode plate 2. In this way, multiple first radiating electrode plates 3 can be used to detect the receiving angle in both the first and second directions.

[0115] In one variation, the number of the second radiating electrode plate 4 and the number of the grounding electrode plate 2 are not particularly limited.

[0116] In one variation, the shape of the protrusion 21 is not particularly limited. The protrusion 21 can be shaped to allow for adjustment of the frequency characteristics of the antenna formed by the second radiating electrode plate 4 and the grounding electrode plate 2. For example, the protrusion 21 may be composed of multiple protrusions. These multiple protrusions may be arranged, for example, along the length of the first portion 611 of the electrode arrangement portion 61 of the second substrate 6.

[0117] In one variation, the first substrate 5 and the second substrate 6 may not necessarily be electrically connected using the first connector 71 and the second connector 72. Alternatively, the first substrate 5 and the second substrate 6 may be electrically connected using wires.

[0118] In one variation, the second substrate 6 is not necessarily limited to a structure in which the electrode arrangement portion 61 and the connector arrangement portion 62 are connected by a flexible connecting portion 63. The second substrate 6 may, for example, be a substrate in which the electrode arrangement portion 61 and the connector arrangement portion 62 are integrally formed.

[0119] In a variation of Embodiment 4, the number of predetermined first radiating electrode plates 3a is not particularly limited. In summary, the antenna device 1C may include one or more third radiating electrode plates 8 opposite to one or more predetermined first radiating electrode plates 3a among the one or more first radiating electrode plates 3. In this case, the antenna device 1C may include: one or more third power supply lines L4, which are not connected to one or more first power supply lines L1 and second power supply lines L2, but are connected to one or more third radiating electrode plates 8; and one or more second grounding lines L5, which connect one or more predetermined first radiating electrode plates 3a to the second radiating electrode plates 4. The one or more third radiating electrode plates 8 may be located inside one or more predetermined first radiating electrode plates 3a when viewed from the thickness direction of the grounding electrode plate 2. This allows for the space-saving arrangement of multiple antennas. For example, in Embodiment 4, all three first radiating electrode plates 3 may be configured as predetermined first radiating electrode plates 3a. In one variation, the number of third radiating electrode plates 8 is not particularly limited. In Embodiment 4, instead of a single third radiating electrode plate 8, multiple third radiating electrode plates 8 may be located inside a predetermined first radiating electrode plate 3a when viewed from the thickness direction of the grounding electrode plate 2. That is, a predetermined first radiating electrode plate 3a may serve as a grounding element for multiple third radiating electrode plates 8. In a variation of Embodiment 4, the third substrate 91 is not necessary. For example, the second substrate 6 may be configured as a multilayer substrate as described in Embodiment 5 instead of a third substrate 91. In this case, a dielectric layer of the second substrate 6 may be disposed between the predetermined first radiating electrode plate 3a and the third radiating electrode plate 8 instead of the third substrate 91. The connection between the first radiating electrode plate 3 and the third radiating electrode plate 8 relative to the second connector 72 can be made using interlayer wiring such as through-holes and vias of the second substrate 6.

[0120] In a variation, when viewed from the thickness direction of the grounding electrode plate 2, the distance d between the connection point (second power supply section 4a) of the second power supply line L2 and the second radiating electrode plate 4 and the end 41 of the second radiating electrode plate 4 does not necessarily have to be 1 / 4 of the wavelength corresponding to the highest frequency band among more than one frequency band used in wireless communication using the second radiating electrode plate 4. It is permissible for the distance d to be 1 / 4 of the wavelength corresponding to any frequency band used in wireless communication using the second radiating electrode plate 4 (that is, the frequency band for which frequency characteristics are to be improved).

[0121] In one variation, it is not necessary for the first radiating electrode plate 3 to correspond to the frequency band of wireless communication via UWB. It is also not necessary for the second radiating electrode plate 4 to correspond to the frequency band of wireless communication via Wi-Fi. The frequency band for wireless communication using the first radiating electrode plate 3 or the second radiating electrode plate 4 can be selected from known frequency bands such as the mid-frequency band of the 2G (2nd generation mobile communication) standard, the low-frequency band of the 4G (4th generation mobile communication) standard, and the low-frequency band of the 5G (5th generation mobile communication) standard. For example, the 2G standard is the GSM (Global System for Mobile Communications) standard. The 4G standard is, for example, the 3GPP LTE (Long Term Evolution) standard. The 5G standard is, for example, 5G NR (New Radio). Alternatively, the frequency band for wireless communication using the first radiating electrode plate 3 or the second radiating electrode plate 4 can be selected from the frequency bands used by various communication standards such as Bluetooth, wireless LAN, specific low-power wireless, and short-range wireless communication.

[0122] In one variation, the first power supply section and the grounding section do not necessarily need to be constituted by the second connector 72. The first power supply section can also be an electrode pad provided on the second substrate 6 for connection with the first radiating electrode plate 3. The grounding section can also be an electrode pad provided on the second substrate 6 for grounding the second radiating electrode plate 4.

[0123] [3. Morphology]

[0124] As can be clearly seen from the above embodiments and modifications, this disclosure includes the following forms. Hereinafter, reference numerals in parentheses are used only to illustrate the correspondence between the embodiments.

[0125] The first embodiment is an antenna device (1; 1A to 1D) comprising: a ground electrode plate (2); one or more first radiating electrode plates (3) opposite to the ground electrode plate (2); a second radiating electrode plate (4) located between the ground electrode plate (2) and the one or more first radiating electrode plates (3); one or more first power supply lines (L1) connected to the one or more first radiating electrode plates (3); a second power supply line (L2) not connected to the one or more first power supply lines (L1) but connected to the second radiating electrode plate (4); and a grounding line (L3) not connecting the one or more first radiating electrode plates (3) to the ground electrode plate (2) but connecting the second radiating electrode plate (4) to the ground electrode plate (2). The one or more first radiating electrode plates (3) are located inside the second radiating electrode plate (4) when viewed from the thickness direction of the grounding electrode plate (2). This configuration allows for the space-saving installation of multiple antennas.

[0126] The second embodiment is an antenna device (1A) based on the first embodiment. In the second embodiment, the antenna device (1A) includes a protrusion (21) extending from the ground electrode plate (2) toward the second radiating electrode plate (4). According to this embodiment, the protrusion (21) allows adjustment of the resonant frequency of the antenna composed of the second radiating electrode plate (4) and the ground electrode plate (2) without affecting the frequency characteristics of the antenna composed of one or more first radiating electrode plates (3) and second radiating electrode plates (4).

[0127] The third embodiment is an antenna device (1A) based on the second embodiment. In the third embodiment, the protrusion (21), when viewed from the thickness direction of the ground electrode plate (2), is located on the opposite side of the connection point (second power supply part 4a) between the second power supply line (L2) and the second radiating electrode plate (4) as the connection point (second connector 72) between the ground line (L3) and the second radiating electrode plate (4). According to this embodiment, by using the protrusion (21), the resonant frequency of the antenna composed of the second radiating electrode plate (4) and the ground electrode plate (2) can be adjusted without affecting the frequency characteristics of the antenna composed of one or more first radiating electrode plates (3) and second radiating electrode plates (4).

[0128] The fourth embodiment is an antenna device (1; 1A to 1C) based on any one of the first to third embodiments. In the fourth embodiment, the antenna device (1; 1A to 1C) includes: a first substrate (5) for which the ground electrode plate (2) is disposed; and a second substrate (6) disposed at a distance from the first substrate (5) for which one or more first radiating electrode plates (3) and second radiating electrode plates (4) are disposed. According to this embodiment, multiple antennas can be arranged in a space-saving manner.

[0129] The fifth embodiment is an antenna device (1; 1A to 1C) based on the fourth embodiment. In the fifth embodiment, one or more first radiating electrode plates (3) are disposed on the side of the second substrate (6) opposite to the first substrate (5). The second radiating electrode plate (4) is disposed on the side of the second substrate (6) on the side of the first substrate (5). According to this embodiment, multiple antennas can be arranged in a space-saving manner.

[0130] The sixth embodiment is an antenna device (1; 1A to 1C) based on the fourth or fifth embodiment. In the sixth embodiment, the antenna device (1; 1A to 1C) includes a first connector (71) and a second connector (72) that are detachably connected to each other. The first connector (71) is disposed on the first substrate (5) and connected to one or more first power supply lines (L1) and ground lines (L3). The second connector (72) is disposed on the second substrate (6) and connected to one or more first radiating electrode plates (3) and second radiating electrode plates (4). According to this embodiment, by connecting the first connector (71) and the second connector (72), one or more first power supply lines (L1) are connected to one or more first radiating electrode plates (3), and the ground line (L3) is connected to the second radiating electrode plate (4). Therefore, the assembly of the antenna device (1; 1A to 1C) becomes easy.

[0131] The seventh embodiment is an antenna device (1; 1A to 1C) based on the sixth embodiment. In the seventh embodiment, the second substrate (6) has: an electrode arrangement section (61) for arranging the one or more first radiating electrode plates (3) and the second radiating electrode plates (4); a connector arrangement section (62) for arranging the second connector (72); and a flexible connection section (63) for connecting the electrode arrangement section (61) and the connector arrangement section (62). According to this embodiment, the assembly of the antenna device (1; 1A to 1C) becomes easier.

[0132] The eighth embodiment is an antenna device (1; 1A to 1C) based on the seventh embodiment. In the eighth embodiment, the electrode arrangement section (61) includes: a first portion (611) for at least two first radiating electrode plates (3) to be arranged; and a second portion (612) protruding from the first portion (611) in a direction intersecting the direction in which the at least two first radiating electrode plates (3) arranged in the first portion (611) are arranged, for at least one first radiating electrode plate (3). The connector arrangement section (62) is arranged with the second portion (612) in the direction in which the at least two first radiating electrode plates (3) arranged in the first portion (611) are arranged. The connecting portion (63) connects the connector arrangement section (62) to the first portion (611). According to this embodiment, even if multiple first radiating electrode plates (3) are provided, the size of the second substrate (6) can be reduced.

[0133] The ninth configuration is an antenna device (1B) based on any one of the fourth to eighth configurations. In the ninth configuration, the second power supply line (L2) and the second radiating electrode plate (4) are integrally formed. According to this configuration, it is possible to reduce manufacturing costs.

[0134] The tenth embodiment is an antenna device (1C) based on any one of the first to eighth embodiments. In the tenth embodiment, the antenna device (1C) includes: a third radiating electrode plate (8) opposite to a predetermined first radiating electrode plate (3a) among the more than one first radiating electrode plates (3); a third power supply line (L4) connected to the third radiating electrode plate (8) instead of the more than one first power supply line (L1) and the second power supply line (L2); and a second grounding line (L5) connecting the predetermined first radiating electrode plate (3a) to the second radiating electrode plate (4). The third radiating electrode plate (8) is located inside the predetermined first radiating electrode plate (3a) when viewed from the thickness direction of the grounding electrode plate (2). According to this embodiment, multiple antennas can be arranged in a space-saving manner.

[0135] The 11th embodiment is an antenna device (1; 1A to 1C) based on any one of the 1st to 10th embodiments. In the 11th embodiment, the second radiating electrode plate (4) has an end (41) located on the side opposite to the connection point (second power supply section 4a) of the grounding line (L3) and the second radiating electrode plate (4) when viewed from the thickness direction of the grounding electrode plate (2) relative to the connection point (second power supply section 4a) of the second power supply line (L2) and the second radiating electrode plate (4). When viewed from the thickness direction of the grounding electrode plate (2), the distance (d) between the connection point (second power supply section 4a) of the second power supply line (L2) and the second radiating electrode plate (4) and the end (41) is 1 / 4 of the wavelength corresponding to the highest frequency band among the more than one frequency bands used in wireless communication using the second radiating electrode plate (4). According to this embodiment, the characteristics for the highest frequency band among the more than one frequency bands used in wireless communication using the second radiating electrode plate (4) can be improved.

[0136] The 12th configuration is an antenna device (1; 1A to 1D) based on any one of the 1st to 11th configurations. In the 12th configuration, the one or more first radiating electrode plates (3) comprise a plurality of first radiating electrode plates (3), which are arranged in two or more directions in a first direction and a second direction, both orthogonal to and mutually orthogonal to the thickness direction of the ground electrode plate (2). According to this configuration, the receiving angle can be detected in both the first and second directions.

[0137] The 13th embodiment is an antenna device (1; 1A to 1D) based on the 12th embodiment. In the 13th embodiment, the one or more first radiating electrode plates (3) comprise three first radiating electrode plates (3) arranged in an L-shape when viewed from the thickness direction of the ground electrode plate (2). According to this embodiment, even though the receiving angle can be detected in both the first and second directions, miniaturization and reduction in manufacturing costs are possible.

[0138] The 14th embodiment is an antenna device (1; 1A to 1D) based on any one of the 1st to 13th embodiments. In the 14th embodiment, the one or more first radiating electrode plates (3) correspond to the frequency band for wireless communication via UWB. The second radiating electrode plate (4) corresponds to the frequency band for wireless communication via Wi-Fi. According to this embodiment, both wireless communication via UWB and wireless communication via Wi-Fi can be realized.

[0139] The 15th embodiment is an antenna unit comprising: one or more first radiating electrode plates (3); a second radiating electrode plate (4) opposite to the one or more first radiating electrode plates (3); a first power supply section (72) for connecting one or more first power supply lines (L1) to the one or more first radiating electrode plates (3); a second power supply section (4a) for connecting a second power supply line (L2) to the second radiating electrode plate (4); and a grounding section (72) for connecting a grounding element to the second radiating electrode plate (4). The one or more first radiating electrode plates (3) are located inside the second radiating electrode plate (4) when viewed from a direction opposite to the second radiating electrode plate (4). According to this embodiment, multiple antennas can be arranged in a space-saving manner.

[0140] Industrial availability

[0141] This disclosure can be applied to antenna devices and antenna elements. Specifically, this disclosure can be applied to antenna devices that include multiple antennas and antenna elements used to construct such antenna devices.

[0142] Explanation of reference numerals in the attached figures

[0143] 1. Antenna device (1A-1D); 10. Antenna element; 2. Grounding electrode plate; 21. Protrusion; 3. First radiating electrode plate; 3a. Predetermined first radiating electrode plate; 4. Second radiating electrode plate; 4a. Second power supply section (connection point); 4b. Partial; 41. End; 5. First substrate; 6. Second substrate; 61. Electrode arrangement section; 611. First part; 612. Second part; 62. Connector arrangement section; 63. Connection part; 71. First connector; 72. Second connector (first power supply section, grounding section (connection point)); 8. Third radiating electrode plate; L1. First power supply line; L2. Second power supply line; L3. Grounding line; L4. Third power supply line; L5. Second grounding line; L6. Power supply wiring.

Claims

1. An antenna device, wherein, The antenna device includes: Grounding electrode plate; One or more first radiating electrode plates, which are opposite to the grounding electrode plate; The second radiating electrode plate is located between the grounding electrode plate and the one or more first radiating electrode plates; One or more first power supply lines are connected to the one or more first radiating electrode plates; The second power supply line is not connected to any one or more of the first power supply lines, but is connected to the second radiating electrode plate; and The grounding wire connects the second radiating electrode plate to the grounding electrode plate, instead of connecting one or more first radiating electrode plates to the grounding electrode plate. The one or more first radiating electrode plates are located inside the second radiating electrode plate when viewed from the thickness direction of the grounding electrode plate. The antenna device includes a protrusion extending from the ground electrode plate toward the side of the second radiating electrode plate.

2. The antenna device according to claim 1, wherein, When viewed from the thickness direction of the grounding electrode plate, the protrusion is located on the opposite side of the connection point between the second power supply line and the second radiating electrode plate.

3. The antenna device according to claim 1 or 2, wherein, The antenna device includes: A first substrate, wherein the grounding electrode plate is disposed; and A second substrate is arranged at a distance from the first substrate, and is used to assemble the one or more first radiating electrode plates and the second radiating electrode plate.

4. The antenna device according to claim 3, wherein, The one or more first radiative electrode plates are disposed on the side of the second substrate opposite to the first substrate. The second radiating electrode plate is disposed on the side of the first substrate of the second substrate.

5. The antenna device according to claim 3, wherein, The antenna device includes a first connector and a second connector that are detachably connected to each other. The first connector is disposed on the first substrate and is connected to one or more first power supply lines and the ground line. The second connector is disposed on the second substrate and is connected to one or more first radiating electrode plates and the second radiating electrode plate.

6. The antenna device according to claim 5, wherein, The second substrate has: An electrode configuration section is provided for arranging the one or more first radiating electrode plates and the second radiating electrode plates; A connector configuration section for configuring the second connector; as well as A flexible connection portion that connects the electrode configuration portion to the connector configuration portion.

7. The antenna device according to claim 6, wherein, The electrode configuration portion includes: a first portion for accommodating at least two first radiating electrode plates; and a second portion protruding from the first portion in a direction intersecting the direction in which the at least two first radiating electrode plates configured in the first portion are arranged, for accommodating at least one first radiating electrode plate. The connector configuration portion is arranged with the second portion in the direction in which the at least two first radiating electrode plates disposed in the first portion are arranged. The connecting portion connects the connector configuration portion to the first portion.

8. The antenna device according to claim 3, wherein, The second power supply line is integrally connected with the second radiating electrode plate.

9. The antenna device according to claim 1 or 2, wherein, The antenna device includes: The third radiative electrode plate is opposite to a predetermined first radiative electrode plate among the more than one first radiative electrode plates; The third power supply line is not connected to the more than one first power supply line and the second power supply line, but is connected to the third radiating electrode plate; and The second grounding wire connects the predetermined first radiating electrode plate to the second radiating electrode plate. The third radiating electrode plate is located inside the predetermined first radiating electrode plate when viewed from the thickness direction of the grounding electrode plate.

10. The antenna device according to claim 1 or 2, wherein, The second radiating electrode plate has an end that, when viewed from the thickness direction of the grounding electrode plate, is located on the side opposite to the connection point between the second power supply line and the second radiating electrode plate. When viewed from the thickness direction of the grounding electrode plate, the distance between the connection point of the second power supply line and the second radiating electrode plate and the end is 1 / 4 of the wavelength corresponding to the highest frequency band among more than one frequency band used in wireless communication using the second radiating electrode plate.

11. The antenna device according to claim 1 or 2, wherein, The one or more first radiating electrode plates include a plurality of first radiating electrode plates, which are arranged in two or more directions in a first direction and a second direction that are orthogonal to and mutually orthogonal to the thickness direction of the grounding electrode plate.

12. The antenna device according to claim 11, wherein, The one or more first radiating electrode plates include three first radiating electrode plates, which are arranged in an L-shape when viewed from the thickness direction of the grounding electrode plate.

13. The antenna device according to claim 1 or 2, wherein, The one or more first radiating electrode plates correspond to the frequency bands of wireless communication via UWB. The second radiating electrode plate corresponds to the frequency band of wireless communication via Wi-Fi.

14. An antenna device, wherein, The antenna device includes: Grounding electrode plate; One or more first radiating electrode plates, which are opposite to the grounding electrode plate; The second radiating electrode plate is located between the grounding electrode plate and the one or more first radiating electrode plates; One or more first power supply lines are connected to the one or more first radiating electrode plates; The second power supply line is not connected to any one or more of the first power supply lines, but is connected to the second radiating electrode plate; and The grounding wire connects the second radiating electrode plate to the grounding electrode plate, instead of connecting one or more first radiating electrode plates to the grounding electrode plate. The one or more first radiating electrode plates are located inside the second radiating electrode plate when viewed from the thickness direction of the grounding electrode plate. The second radiating electrode plate has an end that, when viewed from the thickness direction of the grounding electrode plate, is located on the side opposite to the connection point between the second power supply line and the second radiating electrode plate. When viewed from the thickness direction of the grounding electrode plate, the distance between the connection point of the second power supply line and the second radiating electrode plate and the end is 1 / 4 of the wavelength corresponding to the highest frequency band among more than one frequency band used in wireless communication using the second radiating electrode plate.

15. The antenna device according to claim 14, wherein, The antenna device includes: A first substrate, wherein the grounding electrode plate is disposed; and A second substrate is arranged at a distance from the first substrate, and is used to assemble the one or more first radiating electrode plates and the second radiating electrode plate.

16. The antenna device according to claim 15, wherein, The one or more first radiative electrode plates are disposed on the side of the second substrate opposite to the first substrate. The second radiating electrode plate is disposed on the side of the first substrate of the second substrate.

17. The antenna device according to claim 15 or 16, wherein, The antenna device includes a first connector and a second connector that are detachably connected to each other. The first connector is disposed on the first substrate and is connected to one or more first power supply lines and the ground line. The second connector is disposed on the second substrate and is connected to one or more first radiating electrode plates and the second radiating electrode plate.

18. The antenna device according to claim 17, wherein, The second substrate has: An electrode configuration section is provided for arranging the one or more first radiating electrode plates and the second radiating electrode plates; A connector configuration section for configuring the second connector; as well as A flexible connection portion that connects the electrode configuration portion to the connector configuration portion.

19. The antenna device according to claim 18, wherein, The electrode configuration portion includes: a first portion for accommodating at least two first radiating electrode plates; and a second portion protruding from the first portion in a direction intersecting the direction in which the at least two first radiating electrode plates configured in the first portion are arranged, for accommodating at least one first radiating electrode plate. The connector configuration portion is arranged with the second portion in the direction in which the at least two first radiating electrode plates disposed in the first portion are arranged. The connecting portion connects the connector configuration portion to the first portion.

20. The antenna device according to claim 14 or 15, wherein, The second power supply line is integrally connected with the second radiating electrode plate.

21. The antenna device according to claim 14 or 15, wherein, The antenna device includes: The third radiative electrode plate is opposite to a predetermined first radiative electrode plate among the more than one first radiative electrode plates; The third power supply line is not connected to the more than one first power supply line and the second power supply line, but is connected to the third radiating electrode plate; and The second grounding wire connects the predetermined first radiating electrode plate to the second radiating electrode plate. The third radiating electrode plate is located inside the predetermined first radiating electrode plate when viewed from the thickness direction of the grounding electrode plate.

22. The antenna device according to claim 14 or 15, wherein, The one or more first radiating electrode plates include a plurality of first radiating electrode plates, which are arranged in two or more directions in a first direction and a second direction that are orthogonal to and mutually orthogonal to the thickness direction of the grounding electrode plate.

23. The antenna device according to claim 22, wherein, The one or more first radiating electrode plates include three first radiating electrode plates, which are arranged in an L-shape when viewed from the thickness direction of the grounding electrode plate.

24. The antenna device according to claim 14 or 15, wherein, The one or more first radiating electrode plates correspond to the frequency bands of wireless communication via UWB. The second radiating electrode plate corresponds to the frequency band of wireless communication via Wi-Fi.

25. An antenna device, wherein, The antenna device includes: Grounding electrode plate; One or more first radiating electrode plates, which are opposite to the grounding electrode plate; The second radiating electrode plate is located between the grounding electrode plate and the one or more first radiating electrode plates; One or more first power supply lines are connected to the one or more first radiating electrode plates; The second power supply line is not connected to any one or more of the first power supply lines, but is connected to the second radiating electrode plate; and The grounding wire connects the second radiating electrode plate to the grounding electrode plate, instead of connecting one or more first radiating electrode plates to the grounding electrode plate. The one or more first radiating electrode plates are located inside the second radiating electrode plate when viewed from the thickness direction of the grounding electrode plate. The one or more first radiating electrode plates include a plurality of first radiating electrode plates, which are arranged in two or more directions in a first direction and a second direction that are orthogonal to and mutually orthogonal to the thickness direction of the grounding electrode plate.

26. The antenna device according to claim 25, wherein, The antenna device includes: A first substrate, wherein the grounding electrode plate is disposed; and A second substrate is arranged at a distance from the first substrate, and is used to assemble the one or more first radiating electrode plates and the second radiating electrode plate.

27. The antenna device according to claim 26, wherein, The one or more first radiative electrode plates are disposed on the side of the second substrate opposite to the first substrate. The second radiating electrode plate is disposed on the side of the first substrate of the second substrate.

28. The antenna device according to claim 26 or 27, wherein, The antenna device includes a first connector and a second connector that are detachably connected to each other. The first connector is disposed on the first substrate and is connected to one or more first power supply lines and the ground line. The second connector is disposed on the second substrate and is connected to one or more first radiating electrode plates and the second radiating electrode plate.

29. The antenna device according to claim 28, wherein, The second substrate has: An electrode configuration section is provided for arranging the one or more first radiating electrode plates and the second radiating electrode plates; A connector configuration section for configuring the second connector; as well as A flexible connection portion that connects the electrode configuration portion to the connector configuration portion.

30. The antenna device according to claim 29, wherein, The electrode configuration portion includes: a first portion for accommodating at least two first radiating electrode plates; and a second portion protruding from the first portion in a direction intersecting the direction in which the at least two first radiating electrode plates configured in the first portion are arranged, for accommodating at least one first radiating electrode plate. The connector configuration portion is arranged with the second portion in the direction in which the at least two first radiating electrode plates disposed in the first portion are arranged. The connecting portion connects the connector configuration portion to the first portion.

31. The antenna device according to claim 25 or 26, wherein, The second power supply line is integrally connected with the second radiating electrode plate.

32. The antenna device according to claim 25 or 26, wherein, The antenna device includes: The third radiative electrode plate is opposite to a predetermined first radiative electrode plate among the more than one first radiative electrode plates; The third power supply line is not connected to the more than one first power supply line and the second power supply line, but is connected to the third radiating electrode plate; and The second grounding wire connects the predetermined first radiating electrode plate to the second radiating electrode plate. The third radiating electrode plate is located inside the predetermined first radiating electrode plate when viewed from the thickness direction of the grounding electrode plate.

33. The antenna device according to claim 25 or 26, wherein, The one or more first radiating electrode plates include three first radiating electrode plates, which are arranged in an L-shape when viewed from the thickness direction of the grounding electrode plate.

34. The antenna device according to claim 25 or 26, wherein, The one or more first radiating electrode plates correspond to the frequency bands of wireless communication via UWB. The second radiating electrode plate corresponds to the frequency band of wireless communication via Wi-Fi.

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