Antenna device with touch function and antenna apparatus

Abstract

The present application provides an antenna device with touch function, in particular a chip antenna, comprising a dielectric substrate, a first conductive layer, a second conductive layer and a touch conductive layer. The first conductive layer is disposed inside the dielectric substrate, and the second conductive layer is disposed inside or at the bottom of the dielectric substrate. The first conductive layer and the second conductive layer partially overlap and form an overlapping area. The first conductive layer is connected to a signal feed end, and the second conductive layer is connected to a ground end. The touch conductive layer is disposed inside or at the top of the dielectric substrate and connected to a touch signal transmission end. Through the arrangement of the touch conductive layer, the function of the antenna device can be increased, so that the antenna device can be used to sense touch signals.

Description

Technical Field

[0001] The present invention provides an antenna device with touch function, particularly a chip antenna, which integrates a touch conductive layer into the antenna device, so that the antenna device can be used to sense touch signals. Background Technology

[0002] With the widespread adoption of wireless communication technology, most portable electronic devices today are equipped with mobile communication modules. Mobile phones, smartphones, and laptops can use mobile communication technology to transmit voice, information, and video data over long distances, greatly improving the convenience of using electronic devices.

[0003] In addition, two electronic devices can also connect via a short-range communication module. For example, a Bluetooth transmission module can be installed in a mobile phone and a headset, and after the mobile phone and headset complete Bluetooth pairing and connection, audio and control signals can be transmitted via Bluetooth.

[0004] Whether it's a long-range mobile communication module or a short-range communication module, an antenna is an essential component. For portable electronic devices, stamped metal antennas, printed circuit board antennas, or chip antennas are typically chosen to reduce the size of both the antenna and the portable electronic device. Summary of the Invention

[0005] To further improve upon prior art, this invention proposes an antenna device with touch functionality. The touch-conductive layer is primarily disposed within the chip antenna, enabling the antenna device to not only transmit wireless signals but also sense touch signals. This antenna device increases the additional functionality of the antenna device and reduces the size of electronic devices with touch functionality.

[0006] One object of the present invention is to provide an antenna device with touch functionality, comprising a dielectric substrate, a first conductive layer, a second conductive layer, and a touch conductive layer. The first conductive layer, the second conductive layer, and the touch conductive layer are disposed on the surface or inside the dielectric substrate, with the first conductive layer and the second conductive layer partially overlapping, and are used to transmit wireless signals.

[0007] The touch-conductive layer can serve as a capacitive touch electrode and is connected to a controller via at least one touch signal transmission terminal. When a human body approaches the touch-conductive layer, a change in capacitance occurs, and the controller senses the touch position based on the change in current on the touch-conductive layer. The touch-conductive layer may or may not overlap with the first and second conductive layers, as long as it does not affect the signal transmission of the first and second conductive layers.

[0008] After the electronic device is equipped with the antenna device described in this invention, it can transmit wireless signals through the antenna device and sense touch signals through the antenna device, without the need to set up a separate touch interface in the electronic device, which helps to reduce the size and manufacturing cost of the electronic device.

[0009] Furthermore, during the manufacturing process of electronic devices, the antenna device described in this invention only needs to be directly mounted on the circuit board of the electronic device to simultaneously complete the setup of both the antenna device and the touch interface. This eliminates the need to separately mount traditional antennas and touch interfaces on the circuit board of the electronic device, significantly simplifying the manufacturing process and improving production efficiency.

[0010] One objective of this invention is to provide an antenna device with touch functionality, wherein the first conductive layer, the second conductive layer, and the touch conductive layer can be made of the same material and have similar thicknesses. Therefore, in the fabrication of the antenna device, only the traditional chip antenna manufacturing process steps are required to complete the fabrication of the touch-enabled antenna device described in this invention, without the need for additional manufacturing equipment.

[0011] The antenna device described in this invention can be a chip antenna within a Bluetooth communication module. During manufacturing, it is only necessary to additionally set a large area of ​​conductive layer on the dielectric substrate as a touch conductive layer to complete the manufacturing of the antenna device without increasing the manufacturing cost of the antenna device.

[0012] To achieve the above objectives, the present invention proposes an antenna device with touch functionality, comprising: a dielectric substrate; a first conductive layer disposed on the surface or inside the dielectric substrate and electrically connected to a signal feed terminal; a second conductive layer disposed on the surface or inside the dielectric substrate and electrically connected to a ground terminal, wherein the first conductive layer and the second conductive layer partially overlap to form an overlap area; and a touch conductive layer disposed on the surface or inside the dielectric substrate and electrically connected to at least one touch signal transmission terminal.

[0013] This invention proposes another antenna device with touch functionality, comprising: a dielectric substrate; a first conductive layer disposed on the surface or inside the dielectric substrate; a second conductive layer disposed on the surface or inside the dielectric substrate, wherein the first conductive layer and the second conductive layer partially overlap to form a first overlap region; a third conductive layer disposed on the surface and inside the dielectric substrate, wherein the second conductive layer and the third conductive layer partially overlap to form a second overlap region; a plurality of ground terminals respectively connected to the first conductive layer, the second conductive layer and the third conductive layer; a signal feed terminal connected to the third conductive layer; and a touch conductive layer disposed on the surface or inside the dielectric substrate and connected to at least one touch signal transmission terminal.

[0014] This invention proposes an antenna device with touch functionality, comprising: a circuit board including a signal feed terminal, a ground terminal, and at least one touch signal transmission terminal; and an antenna assembly disposed inside or on the surface of the circuit board, comprising: a dielectric substrate; a first conductive layer disposed on or inside the dielectric substrate and electrically connected to the signal feed terminal; a second conductive layer disposed on or inside the dielectric substrate and electrically connected to the ground terminal, wherein the first conductive layer and the second conductive layer partially overlap to form an overlap area; and a touch conductive layer disposed on or inside the dielectric substrate and electrically connected to the touch signal transmission terminal.

[0015] The aforementioned antenna device with touch function, wherein the touch conductive layer overlaps with the first conductive layer and the second conductive layer, and the first conductive layer is located between the touch conductive layer and the second conductive layer.

[0016] The antenna device with touch function has an area of ​​the touch conductive layer that is larger than the area of ​​the first conductive layer and the second conductive layer.

[0017] The aforementioned antenna device with touch functionality, wherein the touch conductive layer does not overlap with the first conductive layer and the second conductive layer.

[0018] The antenna device with touch function includes a first connection unit connected to a first conductive layer and a signal feed terminal; a second connection unit connected to a second conductive layer and a ground terminal; and at least a third connection unit connected to a touch conductive layer and a touch signal transmission terminal.

[0019] The antenna device with touch function, wherein the first connection unit, the second connection unit and the third connection unit penetrate the dielectric substrate.

[0020] The aforementioned antenna device with touch function includes a circuit board with a clearance area, and the antenna device, signal feed terminal, ground terminal and touch signal transmission terminal are located within the clearance area.

[0021] The antenna device with touch function includes a first connection unit connected to a first conductive layer and a signal feed terminal; a second connection unit connected to a second conductive layer and a ground terminal; and at least a third connection unit connected to a touch conductive layer and a touch signal transmission terminal.

[0022] The beneficial effects of this invention are: it provides a novel antenna device with touch functionality, mainly by placing the touch conductive layer within the chip antenna, enabling the antenna device to not only transmit wireless signals but also sense touch signals. This antenna device increases the additional functionality of the antenna device and also reduces the size of electronic devices with touch functionality. Attached Figure Description

[0023] Figure 1This is a perspective view of an embodiment of the antenna device with touch function according to the present invention.

[0024] Figure 2 This is a side perspective view of an embodiment of the antenna device with touch function according to the present invention.

[0025] Figure 3 This is a perspective view of an embodiment of the antenna device with touch function according to the present invention.

[0026] Figure 4 This is a perspective view of another embodiment of the antenna device with touch function according to the present invention.

[0027] Figure 5 This is a perspective view of another embodiment of the antenna device with touch function according to the present invention.

[0028] Figure 6 This is a perspective view of another embodiment of the antenna device with touch function of the present invention.

[0029] Figure 7 This is a perspective view of another embodiment of the antenna device with touch function of the present invention.

[0030] Figure 8 This is a perspective view of another embodiment of the antenna device with touch function of the present invention.

[0031] Explanation of reference numerals in the attached drawings: 1-Antenna device; 10-Antenna assembly; 11-Dielectric substrate; 111-First surface; 112-First dielectric substrate; 113-Second surface; 114-Second dielectric substrate; 115-Side surface; 12-Overlapping area; 121-First overlapping area; 123-Second overlapping area; 13-First conductive layer; 131-First connection unit; 15-Second conductive layer; 151-Second connection unit; 17-Touch conductive layer; 171-Third connection unit; 173-Conductive connection unit; 20-Circuit board; 21-Clearance area; 23-Signal feed end; 25-Ground end; 27-Touch signal transmission end; 30-Antenna assembly; 33-First ground end; 35-Second ground end; 37-Third conductive layer; 371-Third ground end; 373-Signal feed end. Detailed Implementation

[0032] Please see Figure 1 and Figure 2Figures show a perspective view and a side perspective view of an embodiment of the touch-enabled antenna device 10 of the present invention. As shown, the touch-enabled antenna device 10 can be a chip antenna and includes a dielectric substrate 11, at least one first conductive layer 13, at least one second conductive layer 15, and at least one touch conductive layer 17, wherein the first conductive layer 13, the second conductive layer 15, and the touch conductive layer 17 are disposed on the surface or inside the dielectric substrate 11.

[0033] In one embodiment of the present invention, the dielectric substrate 11 includes a first surface 111 and a second surface 113. The first surface 111 and the second surface 113 may be two opposite sides of the dielectric substrate 11, for example, the first surface 111 and the second surface 113 face each other, wherein the first surface 111 is the lower surface and the second surface 113 is the upper surface.

[0034] In one embodiment of the present invention, the second conductive layer 15 may be disposed on the first surface 111 of the dielectric substrate 11, the touch conductive layer 17 may be disposed on the second surface 113 of the dielectric substrate 11, and the first conductive layer 13 may be disposed inside the dielectric substrate 11, for example, the first conductive layer 13 may be located between the second conductive layer 15 and the touch conductive layer 17. The touch conductive layer 17 may be disposed on the surface or inside the dielectric substrate 11. The phrase "located / disposed inside" means that the touch conductive layer 17 may be embedded in the dielectric material constituting the dielectric substrate 11.

[0035] The first conductive layer 13, the second conductive layer 15, and the touch conductive layer 17 of the present invention are made of a material with conductive properties, such as metal, while the dielectric substrate 11 is made of an insulating or magnetic material and is used to isolate the first conductive layer 13, the second conductive layer 15, and the touch conductive layer 17.

[0036] A portion of the first conductive layer 13 and a portion of the second conductive layer 15 overlap in the thickness direction of the dielectric substrate 11 (the direction from the first surface 111 to the second surface 113), forming an overlapping region 12 in the dielectric substrate 11.

[0037] The resonant frequency of the antenna device 10 is positively correlated with the reciprocal of the distance between the first conductive layer 13 and the second conductive layer 15, the area of ​​the overlapping region 12, and the dielectric constant of the dielectric substrate 11.

[0038] The first conductive layer 13 is electrically connected to a signal feed terminal 23, the second conductive layer 15 is electrically connected to a ground terminal 25, and the touch conductive layer 17 is electrically connected to a touch signal transmission terminal 27. In another embodiment of the present invention, the first conductive layer 13 may also be connected to a ground terminal.

[0039] like Figure 3As shown, the antenna device 10 can be connected to a circuit board 20, for example, disposed on the circuit board 20 of an electronic device, to form an antenna device 1. The circuit board 20 has a clearance area 21, which is an area on the circuit board 20 where no other circuit components are disposed. The antenna device 10 is disposed within the clearance area 21 to isolate the antenna device 10 from other circuit components on the circuit board 20.

[0040] In one embodiment of the present invention, a signal feed terminal 23, a ground terminal 25 and at least one touch signal transmission terminal 27 may be provided in the clearance area 21, wherein the signal feed terminal 23 is connected to the first conductive layer 13 of the antenna device 10, the ground terminal 25 is connected to the second conductive layer 15 of the antenna device 10, and the touch signal transmission terminal 27 is connected to the touch conductive layer 17.

[0041] Specifically, the antenna device 10 with touch functionality includes a first connection unit 131, a second connection unit 151, and a third connection unit 171. The first conductive layer 13 is electrically connected to the signal feed terminal 23 through the first connection unit 131, the second conductive layer 15 is electrically connected to the ground terminal 25 through the second connection unit 151, and the touch conductive layer 17 is electrically connected to the touch signal transmission terminal 27 through the third connection unit 171.

[0042] In one embodiment of the present invention, the first connection unit 131, the second connection unit 151, and the third connection unit 171 may penetrate part or all of the dielectric substrate 11. For example, the first connection unit 131, the second connection unit 151, and the third connection unit 171 may extend to the first surface 111 of the dielectric substrate 11, and connect the signal feed terminal 23, the ground terminal 25, and the touch signal transmission terminal 27 via the first surface 111 of the dielectric substrate 11; the other ends of the first connection unit 131, the second connection unit 151, and the third connection unit 171 are respectively connected to the first conductive layer 13, the second conductive layer 15, and the touch conductive layer 17.

[0043] In another embodiment, the first connecting unit 131, the second connecting unit 151 and the third connecting unit 171 may be disposed along the surface or side surface of the dielectric substrate 11.

[0044] In the drawings of this invention, the first connecting unit 131, the second connecting unit 151 and the third connecting unit 171 are straight lines, but in actual applications they can also be curved lines.

[0045] Furthermore, the first connection unit 131, the second connection unit 151, and the third connection unit 171 are not essential components of the present invention. For example, when the second conductive layer 15 is disposed on the first surface 111 of the dielectric substrate 11, the second conductive layer 15 can be directly connected to the ground terminal 25 on the circuit board 20, and the second connection unit 151 does not need to be disposed between the second conductive layer 15 and the ground terminal 25.

[0046] In practical applications, a larger area of ​​the touch conductive layer 17 can increase the touch sensing area and sensitivity of the antenna device 10. Therefore, the area of ​​the touch conductive layer 17 described in this invention can be larger than the areas of the first conductive layer 13 and the second conductive layer 15.

[0047] In one embodiment of the present invention, such as Figure 1 As shown, the touch conductive layer 17 can completely cover the second surface 113 of the dielectric substrate 11 and overlap with the first conductive layer 13 and the second conductive layer 15, wherein the first conductive layer 13 is located between the touch conductive layer 17 and the second conductive layer 15.

[0048] In the above embodiments of the present invention, such as Figures 1 to 3 As shown, the first conductive layer 13, the second conductive layer 15, and the touch conductive layer 17 are approximately parallel. However, in practical applications, it is only necessary for the first conductive layer 13 and the second conductive layer 15 to be parallel, while the touch conductive layer 17 does not necessarily have to be parallel to the first conductive layer 13 and the second conductive layer 15. For example, the touch conductive layer 17 may have an angle with the first conductive layer 13 and / or the second conductive layer 15, wherein the extension line of the touch conductive layer 17 may intersect with the extension line of the first conductive layer 13 and / or the second conductive layer 15.

[0049] Specifically, such as Figure 4 As shown, when the dielectric substrate 11 is a cuboid, the first conductive layer 13 and the second conductive layer 15 can be parallel to the first surface 111 and the second surface 113 of the dielectric substrate 11, such as the lower surface and the upper surface, while the touch conductive layer 17 can be disposed on the side surface 115 perpendicular to the first surface 111 and the second surface 113, so that the touch conductive layer 17 is perpendicular to the first conductive layer 13 and the second conductive layer 15.

[0050] like Figure 5 As shown, there can be two touch conductive layers 17, which are respectively disposed on two side surfaces 115 of the dielectric substrate 11, for example, two side surfaces facing each other. In addition, the two touch conductive layers 17 can be electrically connected through a conductive connection unit 173. For example, the two touch conductive layers 17 are respectively disposed on two side surfaces 115 facing each other of the dielectric substrate 11, and the conductive connection unit 173 is disposed on the second surface 113 and connects the two touch conductive layers 17.

[0051] In another embodiment of the invention, such as Figure 6 As shown, the touch conductive layer 17 only covers a portion of the second surface 113 of the dielectric substrate 11 and does not overlap with the first conductive layer 13 and the second conductive layer 15.

[0052] The touch conductive layer 17 can serve as a capacitive touch electrode and is connected to a controller via the touch signal transmission terminal 27. When a human body approaches the touch conductive layer 17, a change in capacitance occurs, and the controller can sense the touch position based on the change in current on the touch conductive layer 17.

[0053] Specifically, the touch conductive layer 17 can be connected to the controller via a plurality of touch signal transmission terminals 27. For example, touch signal transmission terminals 27 can be set at the four corners of the touch conductive layer 17, and the controller can calculate the touch position from the difference in current received by the touch signal transmission terminals 27 at the four corners.

[0054] like Figure 7 As shown, the touch conductive layer 17 can be disposed inside the dielectric substrate 11, wherein the touch conductive layer 17 has dielectric substrates 11 on both sides. In one embodiment of the present invention, a first dielectric substrate 112 can be disposed below the touch conductive layer 17, and a second dielectric substrate 114 can be disposed above the touch conductive layer 17. The first dielectric substrate 112 and the second dielectric substrate 114 can be made of different materials and have different dielectric constants or thicknesses. For example, the dielectric constant of the second dielectric substrate 114 is greater than that of the first dielectric substrate 112.

[0055] Please see Figure 8 These are perspective views of another embodiment of the antenna device with touch function of the present invention. As shown in the figure, the antenna device 30 with touch function can be a chip antenna and includes a dielectric substrate 11, a first conductive layer 13, a second conductive layer 15, a third conductive layer 37 and at least one touch conductive layer 17, wherein the first conductive layer 13, the second conductive layer 15, the third conductive layer 37 and the touch conductive layer 17 are disposed on the surface or inside the dielectric substrate 11.

[0056] In one embodiment of the present invention, the dielectric substrate 11 includes a first surface 111 and a second surface 113, for example, the first surface 111 and the second surface 113 are opposite to each other, wherein the first surface 111 is the lower surface and the second surface 113 is the upper surface.

[0057] In one embodiment of the present invention, the second conductive layer 15 is disposed on the first surface 111 of the dielectric substrate 11, the touch conductive layer 17 is disposed on the second surface 113 of the dielectric substrate 11, and the first conductive layer 13 and the third conductive layer 37 are disposed inside the dielectric substrate 11.

[0058] Furthermore, a portion of the first conductive layer 13 overlaps with a portion of the second conductive layer 15 to form a first overlap region 121, while a portion of the third conductive layer 37 overlaps with a portion of the second conductive layer 15 to form a second overlap region 123, so that the antenna device 30 has two different resonant frequencies.

[0059] In practical applications, the distance between the first conductive layer 13 and the second conductive layer 15, the area of ​​the first overlapping region 121, the distance between the third conductive layer 37 and the second conductive layer 15, the area of ​​the second overlapping region 123, and the dielectric constant of the dielectric substrate 11 of the antenna device 30 can be further adjusted to change the first resonant frequency and the second resonant frequency of the antenna device 30.

[0060] like Figure 8 As shown, in this embodiment of the invention, the touch conductive layer 17 can completely cover the second surface 113 of the dielectric substrate 11 and overlap with the first conductive layer 13, the second conductive layer 15, and the third conductive layer 37. For example, the first conductive layer 13 and the third conductive layer 37 are located between the second conductive layer 15 and the touch conductive layer 17. In another embodiment of the invention, the touch conductive layer 17 only covers a portion of the second surface 113 of the dielectric substrate 11 and does not overlap with the first conductive layer 13, the second conductive layer 15, and the third conductive layer 37.

[0061] In practical applications, the first conductive layer 13, the second conductive layer 15, and the third conductive layer 37 of the antenna device 30 can each be connected to a ground terminal. For example, the first conductive layer 13, the second conductive layer 15, and the third conductive layer 37 can be connected to the first ground terminal 33, the second ground terminal 35, and the third ground terminal 371, respectively. The third conductive layer 37 is also connected to a signal feed terminal 373. The touch conductive layer 17 is connected to the touch signal transmission terminal 27.

[0062] Advantages of this invention:

[0063] A novel antenna device with touch functionality is provided, which mainly places the touch conductive layer within the chip antenna, enabling the antenna device to not only transmit wireless signals but also sense touch signals. This antenna device increases the additional functionality of the antenna device and also reduces the size of electronic devices with touch functionality.

[0064] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent variations and modifications made in accordance with the shape, structure, features and spirit described in the claims of the present invention should be included within the scope of the claims of the present invention.

Claims

1. An antenna device with touch control function, characterized in that, include: Dielectric substrate; A first conductive layer is disposed on the surface or inside the dielectric substrate and electrically connected to the signal feed terminal; A second conductive layer is disposed on the surface or inside the dielectric substrate and electrically connected to at least one ground terminal, wherein the first conductive layer and the second conductive layer partially overlap to form an overlap area; and A touch-conductive layer is disposed inside the dielectric substrate and electrically connected to at least one touch signal transmission terminal; The touch conductive layer overlaps with the first conductive layer and the second conductive layer, and the first conductive layer is located between the touch conductive layer and the second conductive layer; The dielectric substrate includes a first dielectric substrate and a second dielectric substrate, and the touch conductive layer is located between the first dielectric substrate and the second dielectric substrate. The device includes a first connection unit connecting the first conductive layer and the signal feed terminal; a second connection unit connecting the second conductive layer and the ground terminal; and at least one third connection unit connecting the touch conductive layer and the touch signal transmission terminal, wherein the first connection unit, the second connection unit and the third connection unit penetrate the dielectric substrate.

2. The antenna device with touch function according to claim 1, characterized in that, The first conductive layer is electrically connected to the ground terminal.

3. The antenna device with touch function according to claim 1, characterized in that, The area of ​​the touch conductive layer is larger than the areas of the first conductive layer and the second conductive layer.

4. An antenna device with touch control function, characterized in that, include: The circuit board includes a signal input terminal, at least one ground terminal, and at least one touch signal transmission terminal; and An antenna device, disposed inside the circuit board or on the surface of the circuit board, and comprising: Dielectric substrate; A first conductive layer is disposed on the surface or inside the dielectric substrate and electrically connected to the signal feed terminal; A second conductive layer is disposed on the surface or inside the dielectric substrate and electrically connected to the ground terminal, wherein the first conductive layer and the second conductive layer partially overlap to form an overlap area; and A touch-conductive layer is disposed inside the dielectric substrate and electrically connected to the touch signal transmission terminal; The touch conductive layer overlaps with the first conductive layer and the second conductive layer, and the first conductive layer is located between the touch conductive layer and the second conductive layer; The dielectric substrate includes a first dielectric substrate and a second dielectric substrate, and the touch conductive layer is located between the first dielectric substrate and the second dielectric substrate. The device includes a first connection unit connecting the first conductive layer and the signal feed terminal; a second connection unit connecting the second conductive layer and the ground terminal; and at least one third connection unit connecting the touch conductive layer and the touch signal transmission terminal, wherein the first connection unit, the second connection unit and the third connection unit penetrate the dielectric substrate.

5. The antenna device with touch function according to claim 4, characterized in that, The circuit board includes a clearance area, within which the antenna device, the signal feed terminal, the ground terminal, and the touch signal transmission terminal are located.

6. The antenna device with touch function according to claim 4, characterized in that, The first conductive layer is electrically connected to the ground terminal.

7. An antenna device with touch control function, characterized in that, include: Dielectric substrate; A first conductive layer is disposed on the surface or inside the dielectric substrate; A second conductive layer is disposed on the surface or inside the dielectric substrate, wherein the first conductive layer and the second conductive layer partially overlap to form a first overlapping area; A third conductive layer is disposed on the surface and inside the dielectric substrate, wherein the second conductive layer and the third conductive layer partially overlap to form a second overlapping area; A plurality of grounding terminals are respectively connected to the first conductive layer, the second conductive layer and the third conductive layer; The signal feed terminal is connected to the third conductive layer; and A touch-conductive layer is disposed inside the dielectric substrate and connected to at least one touch signal transmission terminal; The touch conductive layer overlaps with the first conductive layer and the second conductive layer, and the first conductive layer is located between the touch conductive layer and the second conductive layer; The dielectric substrate includes a first dielectric substrate and a second dielectric substrate, and the touch conductive layer is located between the first dielectric substrate and the second dielectric substrate. The device includes a first connection unit connecting the third conductive layer and the signal feed terminal; a plurality of second connection units respectively connecting the first conductive layer and the corresponding ground terminal, the second conductive layer and the corresponding ground terminal, and the third conductive layer and the corresponding ground terminal; and at least one third connection unit connecting the touch conductive layer and the touch signal transmission terminal, wherein the first connection unit, the second connection unit and the third connection unit penetrate the dielectric substrate.

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