JP7386697B2 - wireless unit - Google Patents

Description

The present invention relates to a wireless unit including an antenna and a power supply component.

2. Description of the Related Art Small and low power consumption wireless devices, typified by Bluetooth (registered trademark), are known as wireless devices that include an antenna and a signal processing IC (Integrated Circuit) and operate independently using a coin battery or the like. For example, Patent Document 1 describes a communication device including a plurality of antennas and a battery used as a power source for a circuit connected to the plurality of antennas. In the communication device described in Patent Document 1, the battery is installed in a direction perpendicular to the main surface of the battery so as to suppress mutual interference between the antenna and peripheral circuits and interference between antennas without hindering miniaturization of the device. The antenna is disposed between a plurality of antennas when viewed, and is configured such that the plurality of antennas overlap the battery when viewed in parallel along the main surface of the battery.

International Publication No. 2018/168548

In communication equipment that has an antenna, peripheral circuit, and battery, if the antenna and battery are installed adjacent to each other, the resonant frequency will shift and the antenna efficiency will decrease, resulting in deterioration of wireless characteristics such as wireless flight distance. It is desirable to install them separately. Moreover, when an antenna, a battery, etc. are mounted on a single board, the installation area becomes large, making it difficult to downsize. On the other hand, when the antenna and the battery are mounted on different boards as described in Patent Document 1, even if it is possible to avoid the antenna and the battery from facing each other, they are positioned close to each other, resulting in good wireless communication. It is difficult to secure wireless characteristics such as flight distance.

In view of the above circumstances, an object of the present invention is to provide a wireless unit having an optimal configuration for miniaturization while maintaining wireless characteristics such as wireless flight distance.

In order to achieve the above object, a wireless unit according to one embodiment of the present invention includes a wireless device, a power supply device, a component device, and a support.
The wireless device includes an antenna and an antenna installation surface on which the antenna is installed.
The power supply device includes a power supply component and a power supply installation surface that is arranged opposite to the antenna installation surface and on which the power supply component is installed.
The component device includes an electronic component and a component installation surface that is arranged between the antenna installation surface and the power supply installation surface and on which the electronic component is installed.
The support body supports the wireless device, the power supply device, and the component device.

In the wireless unit, a component device is arranged between the wireless device and the power supply device. As a result, the antenna and the power supply component are arranged apart from each other by the distance corresponding to the arrangement of the component devices, so that it is possible to reduce the size while suppressing deterioration of wireless characteristics such as wireless flight distance.

The wireless device includes an antenna substrate having a first main surface that is the antenna installation surface, the power supply device includes a power supply board having the power supply installation surface, and the component device has the component installation surface. It may also include a component board.
Thereby, the wireless device, the power supply device, and the component device can each be configured as a board-mounted body including a wiring board and an antenna, power supply component, or electronic component mounted thereon.

The first main surface, which is the antenna installation surface, has a first area where the antenna is installed, and a second area adjacent to the first area, and the wireless device has the antenna and the second area adjacent to the first area. The device may further include a circuit that is electrically connected and processes a signal from the antenna installed in the second area.
This not only simplifies the configuration of wireless devices, but also reduces the wiring length between the antenna and the circuit that processes the antenna signal, which reduces deterioration of circuit characteristics such as noise superposition. can.

The first main surface, which is the antenna installation surface, may be a main surface opposite to the main surface of the antenna board that faces the component board.
This allows the antenna installation surface to be moved further away from the power supply components, thereby making it possible to further suppress deterioration in antenna efficiency.

The component installation surfaces include a first component installation surface that is the main surface of the component board facing the antenna board, and a second component installation surface that is the main surface of the antenna board that faces the first component installation surface. It may also have an installation surface.
In this way, the component mounting surface is provided not only on the component board, but also on the side of the antenna board opposite to the antenna mounting surface, which increases the mounting density of electronic components and improves the functionality of the wireless unit. Expansion can be achieved.

In this case, the electronic components installed on the second component installation surface may be biased toward an area corresponding to the second area.
This makes it possible to eliminate electronic components from being located directly under the antenna, thereby suppressing deterioration of antenna characteristics.

On the other hand, the power supply installation surfaces include a first power supply installation surface that is the main surface of the power supply board that faces the component board, and a second power supply installation surface that is the main surface of the component board that faces the first power supply installation surface. It may also have a power supply installation surface.
In this way, by providing the power supply installation surface not only on the power supply board but also on the component board, it is possible to increase the capacity of the power supply.

Alternatively, the wireless device includes an antenna substrate having a first main surface that is the antenna installation surface and a second main surface that is the component installation surface, and the power supply device includes a first main surface that is the antenna installation surface, and a second main surface that is the component installation surface. The power supply board may include a power supply board disposed opposite to the power supply board and having the power supply installation surface.
The power supply board is not limited to a single power supply board, and may be a stacked body of boards on which a plurality of power supplies are mounted.

On the other hand, the support body may include a plurality of columnar bodies extending in a direction perpendicular to the antenna installation surface and forming a predetermined gap between the antenna installation surface and the power supply installation surface.
In this case, the plurality of columnar bodies can function as spacers that form predetermined gaps with each of the installation surfaces.

At least a portion of the plurality of columnar bodies may be made of a conductive material.
Thereby, the columnar body can be configured as a part of the wiring, so it is possible to downsize the wireless unit and reduce the number of parts.

The electronic component may include at least one of a sensor component, an acoustic component, a light emitting component, a driving component, or a heat generating component.
This makes it possible, for example, to detect the attitude and movement of the wireless unit through an external device, or to control the light emission, sound, etc. of the wireless unit.

According to the present invention, it is possible to configure a wireless unit that can be downsized while maintaining wireless characteristics such as wireless flight distance.

FIG. 1 is an external perspective view showing a wireless unit according to a first embodiment of the present invention. It is a schematic sectional view of the above-mentioned wireless unit. It is a schematic perspective view of the unit main body of the said wireless unit. FIG. 3 is a schematic perspective view of a wireless unit according to a second embodiment. FIG. 3 is a schematic cross-sectional view of a wireless unit according to a second embodiment. FIG. 7 is a schematic cross-sectional view of a wireless unit according to a third embodiment. FIG. 7 is a schematic cross-sectional view of a wireless unit according to a fourth embodiment. FIG. 7 is a schematic cross-sectional view of a wireless unit according to a fifth embodiment. FIG. 7 is a schematic cross-sectional view of a wireless unit according to a sixth embodiment. FIG. 7 is a schematic cross-sectional view of a wireless unit according to a seventh embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

<First embodiment>
1 to 3 show a wireless unit 100 according to a first embodiment of the present invention. FIG. 1 is an external perspective view of the wireless unit 100. FIG. 2 is a schematic cross-sectional view of the wireless unit 100. FIG. 3 is a schematic perspective view of the wireless unit 100 excluding the casing.
Hereinafter, in the figures, a plane parallel to an antenna installation surface 81 to be described later will be referred to as an XY plane, and a direction perpendicular to the antenna installation surface 81 will be referred to as a Z-axis direction. The Z-axis direction corresponds to the stacking direction of the substrates of the wireless unit 100 including a plurality of substrates, and corresponds to the height direction. Hereinafter, the case of viewing from the Z-axis direction will be referred to as plan view, and the case of seeing through from the Z-axis direction will be referred to as planar perspective.

As shown in FIGS. 1 and 2, the wireless unit 100 has a substantially cubic shape with each side of about 10 mm. Note that the numerical values given in this specification are merely examples, and the present invention is not limited thereto.

The wireless unit 100 includes a housing 2 and a unit body 10 held within the housing 2. The casing 2 has a box shape that covers the unit body 10, which has a generally cubic outer shape. The wireless device 100 is configured with the unit body 10 housed in the housing 2. Note that, as shown in FIG. 2, the housing 2 includes a main body portion 2A having an opening on the upper surface and a lid portion 2B that closes the opening. The housing 2 is typically made of a non-conductive material such as synthetic resin, and its shape is not particularly limited, and may be a cube or rectangular parallelepiped as shown in the figure, or a spherical shape. .

As shown in FIGS. 2 and 3, the unit main body 10 includes a wireless device M1, a power supply device M2, a component device M3, and a support body 6.

(wireless device)
The wireless device M1 has an antenna 3 and an antenna installation surface 81 on which the antenna 3 is installed. Wireless device M1 includes an antenna substrate 71 and a circuit 4 that processes antenna signals. The wireless device M1 is configured to be able to transmit and receive radio waves to and from an external device (for example, a smart phone), not shown, using the antenna 3.

The antenna substrate 71 is typically composed of a rigid substrate such as a glass epoxy substrate. Thereby, the antenna 3 is stably supported parallel to the XY plane. The antenna board 71 may be configured with a double-sided wiring board or a single-sided wiring board.

The antenna installation surface 81 is the first main surface of the antenna substrate 71. In this embodiment, the first main surface of the antenna substrate 71 is the front surface (the upper surface in FIG. 2) of the antenna substrate 71. The antenna installation surface 81 has a first region 811 and a second region 812. In the examples shown in FIGS. 1 to 3, the first region 811 and the second region 812 are adjacent to each other in the X-axis direction. The antenna 3 is arranged in the first region 811. In the second region 812, a circuit 4 that processes the signal of the antenna 3 is arranged.

The antenna 3 is typically a planar antenna, and for example, a loop antenna, a microstrip antenna, a plate-shaped inverted F antenna, etc. can be adopted. The antenna 3 is formed by patterning copper foil on the surface of the antenna substrate 71 into a predetermined shape.

A circuit 4 that processes signals from the antenna 3 is electrically connected to the antenna 3 and processes signals transmitted and received via the antenna 3. The circuit 4 that processes the signal from the antenna 3 is typically composed of IC components. In addition to IC components, the circuit 4 that processes the signal from the antenna 3 includes passive components such as coils, capacitors, and resistors for matching the sensitivity of the antenna, as well as filter elements and vibration components for supplying pulse signals to the IC. It may also include children. By mounting the circuit 4 that processes the signal of the antenna 3 on the same plane as the antenna 3 (antenna installation surface 81), the wiring length between the circuit 4 and the antenna 3 can be shortened, so that the desired high frequency characteristics can be secured. At the same time, superimposition of noise can be suppressed as much as possible.

Note that the present invention is not limited to the illustrated example, and components may also be mounted on the back surface (lower surface in FIG. 2) that is the second main surface of the antenna board 71.

(power device)
The power supply device M2 has a power supply component 5 and a power supply installation surface 82 on which the power supply component 5 is installed. The power supply installation surface 82 is arranged to face the antenna installation surface 81 in the Z-axis direction. Power device M2 supplies power to wireless device M1 and component device M3.

In this embodiment, the power supply device M2 includes a power supply board 72. The power supply board 72, like the antenna board 71, is made of a rigid board such as a glass epoxy board. Thereby, the power supply component 5 is stably supported parallel to the XY plane. The power supply board 72 may be configured with a double-sided wiring board or a single-sided wiring board.

The power supply installation surface 82 is the first main surface of the power supply board 72. In this embodiment, the first main surface of the power supply board 72 is the front surface (the top surface in FIG. 2) of the power supply board 72. The power supply component 5 occupies more than half of the surface area of the power supply board 72. Note that the power supply installation surface 82 may be provided on the back surface (lower surface in FIG. 2) that is the second main surface of the power supply board 72. The power supply component 5 may be mounted on the front surface and the back surface of the power supply board 72, respectively.

The power supply component 5 may be singular or plural. The power supply component 5 may be a component that is mainly composed of metal components, and includes, for example, a rechargeable and dischargeable secondary battery, a capacitor, and a coin battery (primary battery). Since the secondary battery can be charged and discharged, it is possible to extend the life of the wireless unit 100 compared to a coin battery. Since a capacitor has a simpler structure and lower cost than a secondary battery or a coin battery, the manufacturing cost of the wireless unit 100 can be reduced. In addition, capacitors have a simpler structure than secondary batteries and coin batteries, and are less prone to failure, so they can lower the defective rate than secondary batteries and coin batteries. On the other hand, since coin batteries are cheaper than secondary batteries, it is possible to reduce the cost of the wireless unit 100.

(Parts device)
The component device M3 includes various electronic components 11 having predetermined functions and a component installation surface 83 on which these electronic components 11 are installed. The component installation surface 83 is arranged between the antenna installation surface 81 and the power supply installation surface 82.

In this embodiment, the component device M3 includes a component board 73. The component board 73, like the antenna board 71, is composed of a rigid board such as a glass epoxy board. Thereby, the electronic component 11 is stably supported parallel to the XY plane. The component board 73 may be composed of a double-sided wiring board or a single-sided wiring board.

The component installation surface 83 is the first main surface of the component board 73. In this embodiment, the first main surface of the component board 73 is the front surface (the upper surface in FIG. 2) of the component board 73. The component installation surface 83 may be provided not only on the front surface of the component board 73 as shown in the figure, but also on the back surface (lower surface in FIG. 2) that is the second main surface of the component board 73. The electronic component 11 may be mounted on the front surface and the back surface of the component board 73, respectively.

The electronic component 11 may be singular or plural. The electronic component 11 is smaller than the power supply component 5, and its surface is mainly made of a non-conductive material such as plastic or ceramic. Examples of such electronic components 11 include sensor components such as an acceleration sensor, an angular velocity sensor, and a geomagnetic sensor. Further, the electronic component 11 may be an acoustic component such as a microphone or a speaker, a light emitting component such as an LED (Light Emitting Diode), a driving component such as a motor, a heat generating component such as a heater, or a combination of these electronic components. Good too. Note that the electronic component 11 may be an electronic component forming part of the circuit 4 that processes the signal from the antenna 3, or may be an electronic component other than the circuit 4 that processes the signal from the antenna 3.

The antenna board 71, the power supply board 72, and the component board 73 are arranged parallel to each other and spaced apart from each other with a predetermined gap. The antenna board 71, the power supply board 72, and the component board 73 have approximately the same external size, and all overlap in plan view. In other words, the projected areas of the antenna installation surface 81 and the component installation surface 83 when projected onto the power supply installation surface 82 completely overlap with the power supply installation surface 82 .

The antenna board 71, the power supply board 72, and the component board 73 are each substantially square plates having four sides along the X-axis direction and the Y-axis direction. One side of the antenna board 71, power supply board 72, and component board 73 is 10 mm or less, and in this embodiment, for example, about 8 mm. The thickness (dimension in the Z-axis direction) of the antenna board 71, the power supply board 72, and the component board 73 is, for example, 1 mm or less, and in this embodiment is, for example, about 0.3 mm. In this embodiment, the antenna board 71, the power supply board 72, and the component board 73 have a substantially square outer shape, but are not limited to this and may have any desired shape.

(Support)
The support body 6 is for supporting the wireless device M1, the power supply device M2, and the component device M3. The support body 6 is not particularly limited as long as it can form a predetermined gap between the wireless device M1 and the component device M3 and between the power supply device M2 and the component device M3. As shown in Fig. 3, it is composed of a plurality of pillars.

The support 6 has a first support 61 that connects the wireless device M1 and the component device M3, and a second support 62 that connects the power supply device M2 and the component device M3. The first and second supports 61 and 62 are typically attached to the four corners of the antenna board 71, power supply board 72, and component board 73.

The first and second support columns 61 and 62 are composed of a plurality of shaft-like or rod-like columnar bodies extending in the Z-axis direction. Although the first and second support columns 61 and 62 are provided coaxially with each other, the present invention is not limited to this, and they may be provided at positions whose axial center positions are offset from each other. In this embodiment, the first and second columns 61 and 62 are composed of a common columnar body, the upper part of the columnar body is configured as the first columnar body 61, and the lower part of the columnar body is configured as the second columnar body 62. configured.

The height of the support body 6 (first and second pillars 61, 62) is not particularly limited, and is appropriately set according to the height (thickness) of the power supply component 5 and the height (thickness) of the electronic component 11. . From the perspective of downsizing the wireless unit 100, the smaller the height of the support 6 is, the better; however, the proximity of the antenna 3 and power supply component 5 causes a shift in the resonant frequency and a decrease in antenna efficiency, resulting in a decrease in the wireless flight distance. Wireless characteristics (antenna characteristics) such as antenna characteristics tend to deteriorate. The larger the gap H (see FIG. 2) between the antenna 3 and the power source component 5 is, the better the communication characteristics such as the communication distance and communication power of the antenna 3 will be, but the wireless unit 100 will inevitably become larger. Therefore, in this embodiment, the component device M3 is arranged within the gap H between the antenna 3 and the power supply component 5 to reduce the size of the wireless unit 100, while forming a constant gap H between the antenna 3 and the power supply component 5. In this way, deterioration of communication characteristics such as communication distance and communication power of the antenna 3 is suppressed.

The constituent material of the support body 6 is not particularly limited, and in this embodiment, it is composed of a metal material such as iron, stainless steel, copper, or aluminum. By making the support body 6 made of metal, it is possible to electrically connect the wireless device M1, the power supply device M2, and the component device M3 via the support body 6. No separate wiring material is required to electrically connect.

The support body 6 is electrically connected to the antenna board 71, the power supply board 72, and the component board 73 by, for example, soldering. The connection method is not particularly limited, and for example, an insertion mounting method can be applied. In this case, through-holes for interlayer connection are provided at the four corners of the antenna board 71, the power supply board 72, and the component board 73, respectively, and the support body 6 is inserted into the through-holes of these boards and soldered. Note that if the first and second support columns 61 and 62 are made of separate members, each support column 61 and 62 can be soldered to the antenna board 71, power supply board 72, and component board 73 by surface mounting method. can.

At least one of the four supports 6 (support 6A) supplies the power supply voltage from the power supply component 5 to the circuit 4 that processes the signal of the antenna 3 of the wireless device M1 and each electronic component 11 of the component device M3. Acts as a supply connection. At least one of the remaining three supports 6 (support 6B) functions as a ground connection section that connects the circuit 4 that processes the signal of the antenna 3 and each electronic component 11 to the ground. The other two supports may be electrically floating. In other words, it is sufficient to have at least one supply connection part and at least one ground connection part.

(Action of this embodiment)
In the wireless unit 100 configured as described above, among the antenna 3, the circuit 4 for processing the signal of the antenna 3, the power supply component 5, and the electronic component 11, the power supply component 5 has the largest area in plan view. In this embodiment, based on the power supply component 5 having the largest planar area, the antenna 3 An antenna board 71 on which the circuit 4 for processing the signal of the antenna 3 is installed, and a component board 73 on which the electronic components 11 are installed are arranged. Thereby, the wireless unit 100 can be made compact.

The power supply component 5 is a bulky metal device, and when the antenna 3 and the power supply component 5 are brought close to each other, the resonant frequency shifts and antenna efficiency decreases, resulting in deterioration of wireless characteristics such as wireless flight distance. . The electronic component 11 has a smaller volume than the power supply component 5 , and the proportion of the surface made of metal is smaller than the power supply component 5 . Therefore, even if the component device M2 is placed near the wireless device M1, the influence on wireless characteristics such as the wireless flight distance of the antenna 3 is smaller than when the power supply device M2 is placed close to it.

In the wireless unit 100 of the present embodiment, the power supply component 5 is arranged so as to overlap the antenna 3 in plan view, and furthermore, the component installation surface on which the electronic component 11 is provided between the antenna installation surface 81 and the power supply installation surface 82 83 is located. In this way, by arranging the antenna 3 and the power supply component 5 so as to face each other so as to overlap in plan view, it is possible to downsize the wireless unit 100. Furthermore, even if the antenna 3 and the power supply component 5 are arranged facing each other so as to overlap in plan view, the electronic component 11 is arranged between the antenna 3 and the power supply component 5 along the stacking direction, so that the antenna 3 and the power supply component 5 are A predetermined gap H can be formed between the antenna and the component 5, thereby suppressing movement of the resonant frequency and deterioration of antenna efficiency, thereby suppressing deterioration of wireless characteristics such as wireless flight distance. In addition, by arranging the electronic component 11 between the antenna 3 and the power supply component 5, the volume of the wireless unit 100 can be minimized, thereby expanding the range of application of the wireless unit 100. For example, the wireless device 100 can be configured to have a small size or three-dimensional shape that resembles a dice, a bell, or the like. In this embodiment, the wireless unit can have a substantially cubic shape, and all surfaces of the wireless unit can have a minimum area.

Further, in the present embodiment, no electronic components are provided on the back side of the first region 811 where the antenna 3 is arranged in the antenna substrate 71. In this way, by eliminating as much as possible the presence of metal products that are close to the antenna 3 with the antenna substrate 71 in between, the adverse effect on the antenna 3 can be reduced.

Further, in this embodiment, the support body has both a function as a connection part that connects each device M1 to M3 and a function as a spacer that forms a gap between each device M1 to M3, The number of parts can be reduced compared to the case where the connection part and the spacer are provided separately.

Here, the support body 6A functioning as a supply connection part and the support body 6B functioning as a ground connection part may be arranged as far as possible from the first region 811 where the antenna 3 is formed. preferable. This suppresses deterioration of wireless characteristics such as wireless flight distance due to the supports 6A and 6B. In this case, the floating support body 6 is a dummy connection part that does not function as an electrical connection part, and even if it is located in the first area 811, it has almost no effect on wireless characteristics such as wireless flight distance. . In the present embodiment, the supports 6A and 6B functioning as the connecting portions are located on both sides of the rectangular second region 812 on the side opposite to the side in contact with the first region 811. Thereby, the supports 6A and 6B can be arranged away from the region that overlaps with the first region 811 in plan view. In this case, the floating support body 6 functions only as a spacer for arranging the wiring boards 71 to 73 to face each other with a predetermined gap between them.

In this embodiment, an example is given in which four supports 6 are provided, but the number of supports 6 is not limited to this. For example, from the viewpoint of the spacer function and the connection part function, at least two supports 6 are sufficient. Also in this case, it is preferable that the two supports 6A and 6B functioning as the connecting portions are each located in a region that at least partially overlaps with the second region 812 in plan view. Thereby, deterioration of wireless characteristics such as wireless flight distance due to the supports 6A and 6B can be reduced compared to the case where they are arranged in a region overlapping with the first region 811.

Furthermore, according to the present embodiment, various electronic components having predetermined functions are employed as the electronic component 11, so that the electronic component 11 further has the following functions.

For example, the wireless unit 100 can be configured using, as the electronic component 11, a 9-axis sensor that is a combination of a 3-axis acceleration sensor, a 3-axis angular velocity sensor, and a 3-axis geomagnetic sensor. By making the wireless unit 100 into a bell shape and attaching it to the collar of a domestic cat, for example, the wireless unit 100 can transmit the cat's movement information acquired by the 9-axis sensor. As a result, the owner can check the state of the cat who is far away and out of sight using an electronic device (for example, a smart phone) that can receive the information transmitted from the wireless unit 100.

Further, since the wireless unit 100 of this embodiment can be configured in a cubic shape, a dice can be configured using the wireless unit 100 using a 9-axis sensor. With the dice having such a configuration, the posture information of the dice acquired by the 9-axis sensor can be transmitted from the wireless unit 100 to the electronic device. Then, for example, a game or the like can be played on the display section of the electronic device using the information on the number of the dice obtained from the posture information of the dice. Furthermore, a speaker may be further provided, and the information on the number of the dice obtained using the 9-axis sensor may be outputted as a sound from the speaker.

Other embodiments will be described below, but structures similar to those of the previously described embodiments will be denoted by the same reference numerals, and descriptions thereof may be omitted. Also in the wireless unit of each embodiment described below, the antenna 3 and the power supply component 5 are arranged to face each other, and the antenna installation surface 81 on which the antenna 3 is provided and the power supply component 5 are provided. A component installation surface 83 on which electronic components 11 are provided is located between the power supply installation surface 82 and the power supply installation surface 82 . As a result, the electronic component 11 is located between the antenna 3 and the power supply component 5 along the stacking direction of the installation surface, and the antenna 3 and the power supply component 5 can be placed apart from each other, allowing wireless It becomes possible to downsize while maintaining wireless characteristics such as distance.

<Second embodiment>
In the first embodiment, an example was given in which electronic components and a power source are not installed on the back side of the antenna board 71, but electronic components and a power source may be installed on the back side of the antenna board 71. 4 and 5 are a schematic perspective view and a schematic cross-sectional view, respectively, of a wireless unit 200 according to a second embodiment of the present invention. In each embodiment after the second embodiment, illustration of the housing is omitted.

As shown in FIGS. 4 and 5, the wireless unit 200 of this embodiment has a unit main body 20. As shown in FIGS. The unit main body 20 includes a wireless device M1 (an antenna board 71, an antenna 3, a circuit 4 for processing a signal from the antenna 3, an electronic component 11), a power supply device M2 (a power supply board 72, a first power supply component 51, an electronic component 11), ), a component device M3 (component substrate 73, electronic component 11, second power supply component 52), and a support body 6.

The wireless unit 200 of this embodiment is provided with a plurality of power supply installation surfaces 82 and a plurality of component installation surfaces 83, respectively. The power supply installation surface 82 includes a first power supply installation surface 82A that is the main surface (front surface) of the power supply board 72 that faces the component board 73, and a main surface (back surface) of the component board 73 that faces the first power supply installation surface 82A. ) and a second power supply installation surface 82B. The first power supply component 51 that constitutes the power supply component 5 is mounted on the first power supply installation surface 82A, and the second power supply component 52 that constitutes the power supply component 5 is mounted on the second power supply installation surface 82B. . Although the same type of power supply components are used for the first power supply component 51 and the second power supply component 52, different types of power supply components may be employed.

On the other hand, the component installation surface 83 includes a first component installation surface 83A which is the main surface (surface) of the component board 73 facing the antenna board 71, and a main surface of the antenna board 71 facing the first component installation surface 83A. It has a second component installation surface 83B which is the (back surface), and a third component installation surface 83C which is the main surface (back surface) of the power supply board 72 on the opposite side to the first power supply installation surface 82A. Appropriate electronic components 11 are mounted on the first to third component mounting surfaces 83, respectively.

The second component installation surface 83B on the side of the antenna substrate 71 is a surface opposite to the antenna installation surface 81. On the second component installation surface 83B, the electronic components 11 are disposed biased in an area that overlaps with the second area 812 of the antenna installation surface 81 (an area corresponding to the second area 812) in plan view, and No electronic component 11 is placed in the area overlapping with 811. That is, the electronic component 11 is not arranged on the back side of the antenna 3 on the antenna board 71.

Similarly, on the component board 73 side, on the first component installation surface 83A, the electronic components 11 are disposed unevenly in a region that overlaps with the second region 812 of the antenna installation surface 81 in plan view, and No electronic component 11 is arranged in the area overlapping with the area 811 of No. 1.

In the wireless device 200 of this embodiment, an antenna board 71 has an antenna installation surface 81 and a second component installation surface 83B, and a power supply board 72 has a first component installation surface 83A and a second power supply installation surface 82B. are located so that the respective component installation surfaces 83A and 83B are opposed to each other. As a result, two layers of electronic components 11 (component devices) are positioned in the Z-axis direction between the antenna 3 and the second power supply component 52, which is located closer to the antenna 3 among the two power supply components 51 and 52. I will do it. Therefore, even in the wireless unit 200 of this embodiment in which the power supply component is mounted on the component board 73, the two layers of electronic components 11 are interposed between the antenna 3 and the power supply component 5. As a result, it is possible to form a predetermined gap between the antenna and the antenna 5, thereby suppressing the shift of the resonant frequency and the decrease in antenna efficiency, thereby suppressing the deterioration of wireless characteristics such as the wireless flight distance.

Furthermore, in the present embodiment, the electronic components 11 placed between the first component installation surface 83A and the second component installation surface 83B are biased towards the second region 812 of the antenna installation surface 81 when viewed from above. The electronic component 11 is not placed in the first area 811 where the antenna 3 is placed. As a result, the electronic component 11 is placed close to the antenna 3, and deterioration of wireless characteristics such as wireless flight distance due to a shift in the resonant frequency or a decrease in antenna efficiency is suppressed.

Even in the wireless unit 200 of this embodiment configured as described above, the same effects as those of the first embodiment described above can be obtained. According to this embodiment, since a plurality of power supply installation surfaces 82 and component installation surfaces 83 are provided, it is easy to increase the functionality of the wireless unit 200 by increasing the number of electronic components mounted. Furthermore, since multiple power supply components can be mounted, sufficient power can be secured.

<Third embodiment>
FIG. 6 is a schematic cross-sectional view of a wireless unit 300 according to a third embodiment of the present invention.

As shown in FIG. 6, the wireless unit 300 of this embodiment has a unit main body 30. Similar to the second embodiment, the unit main body 30 includes a wireless device M1 (an antenna board 71, an antenna 3, a circuit 4 for processing a signal of the antenna 3, and an electronic component 11) and a power supply device M2 (a power supply board 72, a 1 power supply component 51, electronic component 11), component device M3 (component substrate 73, electronic component 11, second power supply component 52), and support body 6.

In this embodiment, in addition to the configuration of the second embodiment, the area between the first component installation surface 83A and the second component installation surface 83B overlaps with the first region 811 of the antenna installation surface 81 in plan view. Electronic components 11 are also arranged in the area. Thereby, the mounting density of components on the second component installation surface 83B is increased, so that the functionality of the wireless unit can be further improved.

In addition, from the viewpoint of suppressing efficiency deterioration of the antenna 3, the electronic components 11 mounted on the back side of the antenna 3 include, for example, an LED configured with a low proportion of conductive material, an electronic component covered with a package resin, etc. Preferably, it is a part or the like.

<Fourth embodiment>
FIG. 7 is a schematic cross-sectional view of a wireless unit 400 according to a fourth embodiment of the present invention.

As shown in FIG. 7, the wireless unit 400 of this embodiment has a unit main body 40. The unit body 40 includes a wireless device M1 (an antenna board 71, an antenna 3, a circuit 4 for processing a signal from the antenna 3, an electronic component 11), a power device M2 (a power board 72, a power component 5), and a component device M3 ( It has a component board 73, an electronic component 11), and a support body 6.

In this embodiment, the component installation surface 83 includes a first component installation surface 83A, a second component installation surface 83B, and a third component installation surface 83C.
The first component installation surface 83A is the main surface (front surface) of the component board 73 facing the antenna board 71, and the second component installation surface 83B is the main surface (surface) of the antenna board 73 facing the first component installation surface 83A. This is the main surface (back surface). The third component installation surface 83C is the main surface (back surface) of the component board 73 opposite to the first component installation surface 83A. Electronic components 11 are mounted on the first to third component mounting surfaces 83A to 83C, respectively.

Similarly to the second embodiment, in the wireless unit 400 of this embodiment, on the second component installation surface 83B, the electronic components 11 are arranged unevenly in an area overlapping with the second area 812 of the antenna installation surface 81. Ru. Thereby, deterioration in antenna efficiency due to the presence of electronic components directly under the antenna 3 can be suppressed.

Furthermore, since the component device M3 is provided on the front and back surfaces of the component board 73, the separation distance (gap H) between the antenna 3 and the power supply component 5 can be increased. This makes it possible to improve the functionality of the wireless unit 400 by increasing the number of mounted components, while further suppressing deterioration of wireless characteristics such as the wireless flight distance of the antenna 3.

<Fifth embodiment>
FIG. 8 is a schematic cross-sectional view of a wireless unit 500 according to the fifth embodiment of the present invention.

As shown in FIG. 8, the wireless unit 500 of this embodiment has a unit main body 50. The unit main body 50 includes a wireless device M1, a power supply device M2, a component device M3, and a support body 6.

The wireless device M1 includes an antenna substrate 91, an antenna 3 installed on an antenna installation surface 81 of the antenna substrate 91, and a circuit 4 that processes a signal from the antenna 3. The antenna substrate 91 corresponds to the antenna substrate 71 in each of the embodiments described above, and the antenna installation surface 81 is one main surface (front surface) of the antenna substrate 91. The antenna installation surface 81 has a first area 811 and a second area 812, the antenna 3 is placed in the first area 811, and the circuit 4 that processes the signal of the antenna 3 is placed in the second area 812. Each will be installed.

The power supply device M2 includes a power supply board 92 and a power supply component 5 installed on the power supply installation surface 82 of the power supply board 92. The power supply board 92 is arranged to face the antenna board 91 in the Z-axis direction, and corresponds to the antenna board 72 in each of the embodiments described above. The power supply installation surface 82 is one main surface (front surface) of the power supply board 92 that faces the antenna board 91. A predetermined gap is formed between the antenna board 91 and the power supply board 92 by the support body 6.

The component device M3 includes an electronic component 11 and a component installation surface 83 on which the electronic component 11 is installed. Component installation surface 83 is the main surface (back surface) of antenna board 91 that faces power supply board 92 . That is, this embodiment does not include a member corresponding to the component board 73 in each of the above-described embodiments, and the component installation surface 83 is provided on the back surface of the antenna board 91. The electronic components 11 are arranged biasedly in the region of the component installation surface 83 that overlaps with the second region 812 in a plan view, and the electronic components 11 are not arranged in the region that overlaps with the first region 811.

Also in the wireless unit 500 of this embodiment, the electronic component 11 (component device M3) is disposed between the antenna 3 and the power supply component 5 facing each other in the Z-axis direction, so that the distance between the antenna 3 and the power supply component 5 is A certain gap H is formed between. Thereby, it is possible to suppress deterioration of wireless characteristics such as wireless flight distance due to a shift in the resonant frequency or a decrease in antenna efficiency. Furthermore, by arranging the electronic component 11 between the antenna 3 and the power supply component 5, the gap H can be effectively used as a space for arranging the components, thereby contributing to miniaturization of the wireless unit 500. . Furthermore, in this embodiment, since the wireless unit 500 is configured using two boards, the antenna board 91 and the power supply board 92, the dimension in the Z-axis direction is smaller than the wireless unit of each of the above-described embodiments. This enables further miniaturization.

<Sixth embodiment>
FIG. 9 is a schematic cross-sectional view of a wireless unit 600 according to the sixth embodiment of the present invention.

As shown in FIG. 9, the wireless unit 600 of this embodiment has a unit main body 60. The unit main body 60 includes a wireless device M1, a power supply device M2, a component device M3, and a support body 6.

This embodiment differs from the fifth embodiment in that it includes a plurality of power supply boards. In this embodiment, the power supply board includes a first power supply board 921 and a second power supply board 922. The first power supply board 921 is arranged to face the antenna board 91 in the Z-axis direction, and the second power supply board 922 is arranged between the antenna board 91 and the first power supply board 921. Predetermined gaps are formed between the antenna board 91 and the second power supply board 922 and between the first power supply board 921 and the second power supply board 922 by the support body 6, respectively.

Wireless unit 600 has first, second, and third power supply installation surfaces 82A, 82B, and 82C. The first power supply installation surface 82A is the main surface (front surface) of the first power supply board 921 that faces the second power supply board 922. The second power supply installation surface 82B is the main surface (back surface) of the second power supply board 922 that faces the first power supply installation surface 82A. The third power supply installation surface 82C is the main surface (front surface) of the second power supply board 922 that faces the antenna board 91. A first power supply component 51 is mounted on the first power supply installation surface 82A, a second power supply component 52 is mounted on the second power supply installation surface 82B, and a third power supply component 51 is mounted on the third power supply installation surface 82C. A power supply component 53 is mounted.

According to the wireless unit 600 of this embodiment configured as described above, the same effects as those of the fifth embodiment described above can be obtained. According to this embodiment, since a plurality of power supply boards 921 and 922 are provided, a plurality of power supply components 51 to 53 can be arranged facing each other in the Z-axis direction. This makes it possible to increase the capacity of the power supply, thereby making it possible to configure a wireless unit with high output or long life.

<Seventh embodiment>
FIG. 10 is a schematic cross-sectional view of a wireless unit 700 according to the seventh embodiment of the present invention.

As shown in FIG. 10, the wireless unit 700 of this embodiment has a unit main body 70. The unit main body 70 includes a wireless device M1, a power supply device M2, a component device M3, and a support body 6.

The wireless device M1 includes an antenna substrate 91 and an antenna 3 installed on an antenna installation surface 81 of the antenna substrate 91. The antenna board 91 corresponds to the first wiring board 71 in the first embodiment, and the antenna installation surface 81 is one main surface (front surface) of the antenna board 91.

The power supply device M2 includes a power supply board 92 and a power supply component 5 installed on the power supply installation surface 82 of the power supply board 92. The power supply board 92 is arranged to face the antenna board 91 in the Z-axis direction, and corresponds to the power supply board 72 in the first embodiment. The power supply installation surface 82 is one main surface (front surface) of the power supply board 92 that faces the antenna board 91. A predetermined gap is formed between the antenna board 91 and the power supply board 92 by the support body 6.

The component device M3 includes a circuit 4 that processes the signal of the antenna 3, and a component installation surface 83 on which the circuit 4 that processes the signal of the antenna 3 is installed. Component installation surface 83 is the main surface (back surface) of antenna board 91 that faces power supply board 92 . That is, in this embodiment, the circuit 4 that processes the signal of the antenna 3 is configured as a part of the electronic component 11 that constitutes the component device M3, and is mounted on the component installation surface 83 on the opposite side to the antenna installation surface 81. This embodiment differs from the first embodiment in this point.

Also in the wireless unit 700 of this embodiment, the same effects as in the fifth embodiment can be obtained. According to this embodiment, since the circuit 4 for processing the signal of the antenna 3 is mounted on the surface opposite to the antenna installation surface 81, it is possible to reduce the height or thickness of the wireless unit 700.

<Modified example>
It goes without saying that the present invention is not limited only to the above-described embodiments, and various modifications may be made.
For example, in the above-described embodiment, the wireless device M1, the power supply device M2, and the component device M3 are electrically connected via the conductive supports 6 (6A, 6B). The electrical connection method is not limited to the above example as long as it can ensure a good connection. For example, wiring members such as wire bonding or flexible cables may be used to electrically connect each device.

Further, in the above-described embodiment, the support body is composed of the pillars 6, but the structure of the support body 6 is not particularly limited as long as it maintains the gap between the substrates. For example, the support may be a resin layer filled between the substrates.

Further, in the above-described embodiment, an example was given in which the projection area when the antenna 3 is projected onto the power supply component 5 is completely within the area of the power supply component 5, but the projection region of the antenna 3 is partially within the power supply component 5. It may be located in the area of part 5. This makes it possible to reduce the area of the wireless device when viewed from above, compared to a configuration in which the projection area of the antenna 3 and the area of the power supply component 5 do not overlap at all. From the viewpoint of reducing the area when the wireless unit is viewed from above, it is preferable that the projection area of the antenna 3 onto the power supply component 5 is completely within the area of the power supply component 5.

Further, in the above-described embodiment, there may be two or more ground supports that connect each device M1 to M3 to the ground potential. This increases the wireless shielding effect and reduces the effects of unnecessary radiation and disturbance noise.

Further, in the above-described embodiment, an example was given in which each substrate has the same external size and completely overlaps in plan view, but each substrate may have a different size. In this case as well, the size and arrangement of other boards should be adjusted so that the size of the unit main body in plan view is not larger than the power supply board on which the power supply components are installed, using the power supply part with the largest planar area as a reference. By determining , the wireless unit can be made compact and compact.

Further, in the above-described embodiment, an example was given in which the power supply components are installed on the power supply board, but the power supply component may be connected and fixed by a support or the like without providing the power supply board. Even in such a configuration, wireless characteristics such as wireless flight distance can be maintained by configuring the electronic components to be located between the power supply component and the antenna, which are located opposite to each other along a certain direction. This makes it possible to downsize the device.

Further, in the above-described embodiment, an example is given in which the antenna is configured by a conductive pattern formed on a substrate, but it may be a chip antenna mounted on a substrate.

100, 200, 300, 400, 500, 600, 700...Radio unit 3...Antenna 4...Circuit for processing the signal of antenna 3 5, 51, 52, 53...Power supply parts 6, 6A, 6B, 61, 62...Support Body 11... Electronic components 71, 91... Antenna board 72, 92, 921, 922... Power supply board 73... Component board 81... Antenna installation surface 82, 82A, 82B, 82C... Power supply installation surface 83, 83A, 83B, 83C... Components Installation surface M1...Wireless device M2...Power device M3...Component device

Claims (6)

an antenna substrate having an antenna installation surface on which the antenna is installed;
a first power supply board having a first power supply installation surface on which a first power supply component is installed;
a second power supply board disposed between the antenna board and the first power supply board and having a second power supply installation surface on which a second power supply component is installed;
a plurality of columnar supports that support the antenna board, the second power supply board, and the first power supply board in this order with a predetermined gap between them ;
A surface of the antenna board opposite to the antenna installation surface and a surface of the second power supply board opposite to the second power supply installation surface are arranged to face each other,
The second power supply installation surface and the first power supply installation surface are arranged to face each other,
The antenna, the first power supply component, and the second power supply component are arranged so as to overlap when viewed from above,
The surface of the antenna board opposite to the antenna installation surface and/or the surface of the second power supply board opposite to the second power supply installation surface is a component installation surface on which electronic components are installed.
wireless unit. The wireless unit according to claim 1 ,
The antenna installation surface has a first area where the antenna is installed, and a second area adjacent to the first area,
The antenna board further includes a circuit that is electrically connected to the antenna and processes a signal from the antenna installed in the second area. The wireless unit according to claim 2 ,
A surface of the antenna board opposite to the antenna installation surface is the component installation surface,
The electronic component installed on the component installation surface of the antenna board is biased toward an area corresponding to the second area. The wireless unit. The wireless unit according to any one of claims 1 to 3 ,
The plurality of columnar supports extend in a direction perpendicular to the antenna installation surface.
wireless unit. The wireless unit according to claim 4,
At least a portion of the plurality of columnar supports is made of a conductive material. A wireless unit. The wireless unit according to any one of claims 1 to 5 ,
The electronic component includes at least one of a sensor component, an acoustic component, a light emitting component, a driving component, or a heat generating component. Wireless unit.

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