JP2000341021A - Radio device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a radio device small-sized and thin by providing an antenna constituted by arranging a conductor thin film almost in parallel to a substrate so as to surround battery cells and connected to a signal line and a radio circuit which is supplied with the DC current from the battery cells and performs a transmitting and receiving process to and from the antenna. SOLUTION: A power line 6 is connected to a DC current input terminal 7 of a radio circuit 2. The DC current output terminal 8 of the radio circuit 2 is connected to the ground of the substrate 1. The conductor thin film constituting the antenna 3, on the other hand, is connected to the signal line 12, which is connected to the high-frequency signal terminal 13 of the radio circuit 2 and is capable of performing transmission or reception. Further, the flat antenna 3 has its flat surface (a) arranged almost in parallel to the substrate 1, and consequently the conductor thin film becomes flat and is arranged nearly in parallel to the substrate 1. Consequently, the radiation quantity can be maximized within a limited space, and hence the performance of the antenna can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless device, and more particularly to a small wireless device suitable for portable use.

[0002]

2. Description of the Related Art In recent years, there has been an increasing demand for smaller and thinner portable wireless devices, and it has been predicted that in the future, there will be a need for portable wireless devices of the size of a wristwatch.

[0003] In response to such needs, technology development for reducing the size and thickness of wireless devices has been promoted. In order to reduce the size and thickness of the wireless device, first, it is necessary to reduce the size of the components constituting the device.

[0004] A radio circuit which is a main component of the radio apparatus,
Among the antennas and batteries, there is a prospect that wireless circuits can be considerably reduced in size by applying IC technology.
However, it is very difficult to reduce the size of the antenna and the battery, which is a factor that hinders the reduction in size and thickness of the wireless device.

As described above, the reason why the size and thickness of the antenna and the battery are not reduced is as follows.

First, consider the antenna. The length of the antenna is basically required to be at least about a quarter of the wavelength used. Therefore, the higher the frequency used for the wireless device, the smaller the antenna, but the frequency band currently used for the portable wireless device is 200 MHz.
To about 2 GHz, so the antenna is at least about 3.8 cm (quarter wavelength of 2 GHz) to 38
A length of about cm (a quarter wavelength of 200 MHz) is required. Here, if the size is about 4 cm, it is a sufficiently small and acceptable value in a conventional mobile phone. However, assuming that the wireless device is downsized and has a size of a wristwatch, for example, the size of the above-mentioned antenna is a problem. It becomes a big size.

In the case of an antenna, the basic performance of the antenna is proportional to the volume or area possessed by the antenna.
Therefore, forcible downsizing of the antenna significantly degrades the performance of the antenna.

[0008] Further, in a small radio device, it is necessary to have a built-in antenna to make the appearance smaller. Therefore, not only the miniaturization but also a technology for accommodating it inside the device together with other parts is required.

On the other hand, regarding batteries, the energy density of batteries has increased due to recent efforts to optimize battery materials.
In addition, as a result of the power saving of the wireless circuit, the size of the battery occupying the wireless device has been reduced as compared with the related art.
However, since the performance of a battery tends to be proportional to its capacity as in the case of an antenna, the size and thickness of the battery are naturally limited.

As described above, there is a limit in reducing the size of the components of the wireless device itself. On the other hand, the size and thickness of the wireless device are reduced by changing the arrangement of the components in the wireless device. Have been tried.

FIG. 9 is a schematic diagram showing a conventional radio apparatus for the purpose of miniaturization and thickness reduction. Substrate 1
The wireless circuit 122 is formed on the wireless circuit 1.
A battery 123 is arranged in a form stacked on the battery 22. The positive electrode of the battery 123 and the wireless circuit 122 are connected by a power line 124. The wireless circuit 122 is connected to the ground of the substrate 121. Negative electrode of battery 123 and substrate 121
Are connected by a power supply line 124. On the other hand, an antenna 125 made of a metal foil is also arranged on the substrate 121. The antenna 125 and the wireless circuit 122 are connected to a signal line 126.

As described above, the wireless circuit 122 and the battery 12
By stacking and arranging the three, the size and thickness of the wireless device can be reduced. This allows the wireless circuit 12
This is because the component arrangement area on the board is reduced as compared with the case where the 2 is not stacked.

However, in order to achieve further miniaturization and thinning, the battery 123 having a large area and the antenna 12 are required.
Although a method of laminating 5 is also conceivable, it is not an effective method because the performance of the antenna may be significantly deteriorated if an object is arranged close to the space between the sheet-like antenna 125 and the substrate.

[0014]

As described above,
In a conventional wireless device, there has been a limit to reducing the size and thickness without deteriorating the performance of the antenna.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a wireless device that can be reduced in size and thickness without deteriorating antenna performance. .

[0016]

The present invention is directed to a battery cell having at least a substrate having a ground; and at least a positive electrode and a negative electrode, wherein the positive electrode is connected to a power supply line and the negative electrode is connected to the ground of the substrate. And a conductor thin film,
An antenna, wherein the conductive thin film surrounds the battery cell, is disposed substantially parallel to the substrate, and is connected to a signal line; and has a DC current input / output terminal and a high-frequency signal terminal; Receiving a DC current from the battery cell connected to the ground of the substrate and the power supply line, and transmitting or receiving a high-frequency signal to the antenna by connecting the high-frequency signal terminal to the signal line; And a wireless circuit for performing the following.

In the antenna, it is preferable that the conductive thin film is further connected to a negative electrode of the battery cell or a ground of the substrate at least at a high frequency.

Also, the present invention provides a substrate having at least a ground; a battery cell having at least a positive electrode and a negative electrode, wherein the positive electrode is connected to a power supply line and a signal line, and the negative electrode is connected to the ground of the substrate; An antenna including a conductive thin film, wherein the conductive thin film surrounds the battery cell, is disposed substantially parallel to the substrate, and is connected to the positive electrode via a first capacitor; A signal terminal, the DC current input / output terminal is connected to the power supply line to which the ground and the inductance of the substrate are connected in series to receive a DC current from the battery cell, and the high-frequency signal terminal is A radio circuit for transmitting or receiving a high-frequency signal to or from the antenna by connecting a second capacitor to the signal line connected in series. It is a wireless device that.

In the antenna, it is preferable that the conductive thin film is further connected to the negative electrode via a third capacitor.

Further, the antenna has a flat surface, the total length of the sides of the flat surface is substantially the same as a half wavelength at a used frequency, and the positive electrode terminal provided on the positive electrode and the negative electrode provided on the negative electrode It is desirable that the terminals are arranged on substantially the sides of the flat surface of the antenna.

Further, the antenna has a flat surface, and the shape of the flat surface is rectangular, and at least one pair of sides parallel to each other has a length substantially equal to a half wavelength at a used frequency, and is connected to the negative electrode. The provided negative terminal is disposed substantially at the center of the flat surface of the antenna, and the positive terminal provided on the positive electrode is disposed on a line that substantially divides the longitudinal length of the antenna into three equal parts. Is desirable.

In the present invention, the battery cells are surrounded by the conductive thin film forming the antenna. That is,
A conductor thin film that functions as an antenna is used as an exterior material of a battery in a wireless device. Thus, the antenna and the battery in the wireless device are integrated to reduce the size of the wireless device. Moreover, since the battery cells are present inside the antenna, the battery is not disposed between the antenna and the substrate, and the presence of the battery does not affect the high-frequency current flowing on the surface of the conductive thin film. Therefore, the performance of the antenna does not deteriorate.

Further, in the present invention, a capacitor and an inductance are appropriately arranged to prevent a high-frequency current from flowing into a power supply line for supplying a DC current to a radio circuit, prevent a DC current from flowing into a signal line through which a high-frequency current flows, and And battery performance is prevented from lowering. Therefore, according to the present invention, the size of the wireless device can be reduced without lowering the performance of the antenna and the battery.

[0024]

(Embodiment 1) An embodiment of the present invention will be described with reference to FIG. FIG. 1 is a schematic diagram showing the configuration of the wireless device of the present invention. FIG. 1A is a perspective view illustrating a configuration of a wireless device according to the present invention. FIG. 1B is a cross-sectional view of the wireless device shown in FIG.

As shown in FIGS. 1A and 1B, the radio circuit 2 is disposed on a substrate 1. An antenna 3 made of a conductive thin film and a battery cell (not shown) surrounded by the antenna 3 are arranged on the substrate 1.

The battery cell has at least a positive electrode and a negative electrode, and further has an electrolyte required to function as a power source.

The radio circuit 2 receives supply of a direct current from the battery cell, and performs transmission or reception processing of a high frequency signal to the antenna 3. The antenna 3 transmits or receives a high-frequency signal to the outside. The battery cell is a wireless circuit 2
Act as a power supply for supplying a direct current to the power supply.

The above substrate 1, radio circuit 2, antenna 3,
The battery cells are connected as follows.

On the outer surface of the antenna 3, a positive terminal 4 and a negative terminal 5 connected to the positive and negative electrodes of the battery cell extend.

The positive terminal 4 is connected to a power supply line 6,
The power line 6 is further connected to the wireless circuit 2 at a DC current input terminal 7 of the wireless circuit 2. The wireless circuit 2 is connected to the ground of the substrate 1 at the DC current output terminal 8 using, for example, a conductor element 9. The ground of the substrate 1 is a metal layer formed on the back surface of the insulating substrate 1,
When the radio circuit 2 is configured by a microstrip circuit, it serves as a ground conductor. The negative electrode terminal 5 is, for example, the conductor element 1.
0 is connected to the ground of the substrate 1. As a result, the battery cell and the wireless circuit 2 are connected in a DC manner, and a DC current can be supplied from the battery cell to the wireless circuit 2. An inductance 11 may be connected in series to the power supply line 6 connecting the positive electrode terminal 4 and the wireless circuit 2, thereby preventing inflow of noise from the wireless circuit 2.

On the other hand, the conductive thin film forming the antenna 3 is
The signal line 12 is further connected to a high-frequency signal terminal 13 of the wireless circuit 2 and connected to the wireless circuit 2.
A high-frequency signal can be transmitted or received between the antenna and the antenna 3.

The conductor thin film forming the antenna 3 is
The battery cell is connected to the negative electrode terminal 5 in a high frequency or DC manner by a signal line 14. The conductive thin film constituting the antenna 3 may be connected to the ground of the substrate 1 in a high frequency or DC manner.

The outer shape of the antenna 3 surrounding the battery cell has a flat shape. Further, the flat antenna 3 is arranged so that its flat surface (a) is substantially parallel to the substrate 1, whereby the conductive thin film forming the antenna 3 is arranged to be flat and substantially parallel to the substrate. I have. Accordingly, the radiation amount can be maximized in the limited volume, so that the performance of the antenna can be improved.

That is, the radiation does not actually come from the antenna 3, but from a portion 12 ′ of the signal line 12 corresponding to between the antenna 3 and the substrate 1. The radiation amount is signal line 12
It is known that it is proportional to the square of the length h of a portion 12 'corresponding to the distance between the antenna 3 and the substrate 1. In a small antenna, the performance is improved by increasing this h as much as possible. Therefore, the antenna performance with respect to the volume occupied by the antenna can be increased by making the outer shape of the antenna 3 flat and flattening the conductor thin film. For the same reason, the antenna 3 and the substrate 1 are made substantially parallel to each other.
By making the portion 12 'corresponding to 1 vertical, the antenna performance with respect to the volume occupied by the antenna can be increased.

If the shapes and dimensions of the antenna 3 and the signal line 12 are formed so as to resonate in a desired frequency band,
In a desired frequency band, the antenna 3 can be operated as an antenna with good performance.

The portable wireless device is constructed by housing the circuit board having the above-described configuration in a case for a portable wireless device.

In this embodiment, a flat battery cell is surrounded by a conductive thin film constituting an antenna. That is, by using a conductor thin film that acts as an antenna as an exterior material of the battery cell, the antenna and the battery cell in the wireless device are integrated to reduce the size of the wireless device. Moreover, since the battery cells are surrounded by the conductor thin film acting as an antenna and the battery cells are present inside the antenna, the battery is not disposed between the antenna and the substrate, and the surface of the conductor thin film is formed by the presence of the battery. It does not affect the flowing high-frequency current. Therefore, the performance of the antenna does not deteriorate. (Embodiment 2) An embodiment of the present invention will be described with reference to FIG.
FIG. 2 is a schematic diagram illustrating a wireless device of the present invention.

In FIG. 2, the radio circuit 22 is arranged on the substrate 21. An antenna 23 made of a conductive thin film and a battery cell (not shown) surrounded by the antenna 23 are arranged on the substrate 21.

The outer shape of the antenna 23 surrounding the battery cell is flat as in the first embodiment. further,
The flat antenna 23 is disposed so that its flat surface is substantially parallel to the substrate 21 as in the first embodiment. As a result, the conductive thin film forming the antenna 23 is flat and arranged substantially parallel to the substrate 21.

The above-mentioned substrate 21, wireless circuit 22, battery cell, and antenna 23 are connected as follows.

On the outer surface of the antenna 23, a positive terminal 24 and a negative terminal 25 connected to the positive and negative electrodes of the battery cell extend.

The positive terminal 24 is connected to a power supply line 26, and the power supply line 26 is further connected to a DC current input terminal 27 of the wireless circuit 22. An inductance 28 is connected in series with the power supply line 26. The wireless circuit 22 is connected to the ground of the substrate 21 at the DC current output terminal 29 by using, for example, the conductor element 30. The substrate 21
Is a metal layer formed on the back surface of the insulating substrate 21 and serves as a ground conductor when the radio circuit is formed of a microstrip circuit. The negative terminal 25 is connected to the ground of the substrate 21 using, for example, a conductor element 31. As a result, the battery cell and the wireless circuit 22 are connected in a DC manner, and a DC current can be supplied from the battery cell to the wireless circuit 22.

On the other hand, a signal line 32 connecting the positive electrode terminal 24 and the conductive thin film of the antenna 23 is connected to the positive electrode terminal 24. A first capacitor 33 is connected in series between the positive terminal 24 of the signal line 32 and the conductive thin film of the antenna 23. Further, a signal line 35 connecting the positive terminal 24 and the high-frequency signal terminal 34 of the wireless circuit 22 is connected to the positive terminal 24. A second capacitor 36 is connected in series between the positive terminal 24 of the signal line 35 and the high-frequency signal terminal 34. As a result, the antenna 23 and the wireless circuit 22 are connected and integrated in a high frequency band, and a high-frequency signal can be transmitted or received between the antenna 23 and the wireless circuit 22.

A signal line 37 for connecting the negative electrode terminal 25 and the conductor thin film of the antenna 23 is connected to the negative electrode terminal 25,
A third capacitor 38 is connected in series between the negative terminal 25 of the signal line 37 and the conductive thin film of the antenna 23.

If the shapes of the antenna 23 and the signal line 35 are formed so as to resonate in a desired frequency band, the antenna 23 can operate as an antenna in a desired frequency band with good performance.

The portable wireless device is constructed by housing the circuit board having the above-described configuration in a case for a portable wireless device.

In this embodiment, the flat battery cells are surrounded by the conductor thin film of the antenna. That is, by using a conductor thin film that functions as an antenna as an outer material of the battery cell, the antenna and the battery cell in the wireless device are integrated to reduce the size of the wireless device. Moreover, since the battery cells are present inside the antenna, the battery is not disposed between the antenna and the substrate, and the presence of the battery does not affect the high-frequency current flowing on the surface of the conductive thin film. Therefore, the performance of the antenna does not deteriorate.

Further, as described above, the first
The antenna 23 and the radio circuit 22 are connected at high frequency by connecting the capacitor 33 in series, connecting the second capacitor 36 to the signal line 35 in series, and further connecting the third capacitor 38 to the signal line 37 in series. In addition, the direct current of the battery cell is prevented from directly flowing into the high frequency signal circuit of the wireless circuit 22. Further, by connecting an inductance 28 to the power supply line 26 in series,
The high frequency signal from 3 is prevented from leaking to the direct current circuit of the radio circuit 22.

As a result, the performance of the battery and the radio circuit does not deteriorate. (Embodiment 3) The present invention, for example, Embodiment 1 or Embodiment 2
One structural example of the battery cell and the antenna used in the wireless device will be described below with reference to FIG. FIG. 3 is a sectional view showing the structure of the battery cell and the antenna of the wireless device of the present invention.

The flat-shaped battery cell 41 has an insulating layer 42
Is surrounded by an antenna 43 made of a conductive thin film.

By being surrounded by the antenna 43 via the insulator layer 42, the antenna 43 and the battery cell 41 are insulated from each other, and the influence of the battery cell 41 on the antenna 43 is reduced. Actions such as preventing rupture occur. Examples of the insulator layer 42 include a resin layer made of a thermoplastic resin such as polyethylene and polypropylene.

Antenna 43 having battery cell 41 inside
Has a flat shape, and more preferably, the shape of the largest flat surface (a) is rectangular. Antenna 4
The thickness of the outer shape of No. 3 is 30 times the height between the substrate and the antenna 43.
% Is desirable. If the thickness is too large, the performance of the antenna is degraded. If the thickness is too small, the battery capacity may be reduced.

Further, the conductor thin film forming the antenna 43 must not only function to house and hold the components of the battery cell 41 as an exterior material of the battery cell and protect it, but also to function as an antenna of a wireless device. . Therefore, the material is desirably a metal, for example, aluminum or copper. It is desirable that the thickness of the conductive thin film be as thin as possible within a range not less than the skin thickness for the operating frequency of the antenna. If the thickness is too large, the weight and size of the wireless device may be impaired. If the thickness is too small, the conductor loss of the antenna may increase and the gain may deteriorate.

The battery cell used in the present invention is a sheet-like positive electrode 44, negative electrode 45,
And a separator 46 interposed between the positive electrode 44 and the negative electrode 45
And the electrolyte is preferably impregnated in the positive electrode 44, the negative electrode 45, and the separator 46.

The positive electrode 44, the negative electrode 45, and the separator 46
As shown in FIG. 3, the battery cell 41 composed of the laminate of the above may be formed by winding the laminate and pressing it to form a flat shape, or may be obtained by simply laminating a planar positive electrode, a negative electrode, and a separator. May be used.

The electrolyte is impregnated, for example, in the form of a liquid electrolyte or a polymer gel electrolyte in which a solid electrolyte is dissolved in a solvent or a polymer gel.

The positive electrode 45 and the negative electrode 46 are provided with a positive terminal 47 and a negative terminal 48 for extracting a current to the outside. (Embodiment 4) The present invention, for example, Embodiment 1 or Embodiment 2
Another structural example of the battery cell and the antenna used in the wireless device will be described below with reference to FIG. FIG. 4 is a diagram showing the structure of the battery cell and the antenna of the wireless device of the present invention.

FIG. 4A is a perspective view showing the appearance of an antenna surrounding a battery cell. The antenna 51 is a flat antenna in which a conductive thin film constituting the antenna 51 surrounds a flat battery cell sandwiching the battery cell from both sides, and is sealed around the battery cell to seal the battery cell. An insulator layer is interposed between the battery cell and the antenna 51 to insulate the battery cell from the antenna 51. As the insulator layer, the insulator layer 4 in FIG.
2 and the like. In addition, antenna 5
1 has a flat shape similar to that of the antenna 43 in FIG. Further, as the conductor thin film forming the antenna 51, a conductor thin film as used for the antenna 43 in FIG. 3 can be mentioned. As a configuration of the battery cell, a configuration such as the battery cell 41 in FIG. 3 is exemplified.

The battery cell and the antenna having the above-described structure are formed by using one or two laminated films including an insulating layer such as a thermoplastic resin film and a conductive thin film, and forming the insulating layer and the outermost layer on the battery cell side by using the conductive layer. Laminate films are arranged on both sides of the battery cell so as to be thin, and the battery cell is sandwiched. Next, if necessary, an electrolytic solution or the like is injected into the battery cell, and finally, the opening of the laminate film is heated, heat-sealed, and sealed to obtain a laminate film. According to this method, the battery cell and the antenna can be easily integrated.

In the antenna 51 obtained by this method, an insulating layer is present between the two conductor thin films at the sealing portion located around the side of the flat surface of the antenna 51. In terms of high frequency, it can be completely regarded as one conductor plate, and both of them act as an antenna. The reason will be described below.

FIG. 4B-1 is a cross-sectional view of the antenna 51 and the battery cell taken along the line AA 'shown in FIG. 4A. The battery cell 53 is covered with the antenna 51, and an insulator layer 54 is interposed between the battery cell 53 and the antenna 51 to insulate the battery cell 53 and the antenna 51.

FIG. 4B-2 is an enlarged cross-sectional view of the cross section of the end of the antenna 51 (the part circled in FIG. 4B-1). At the end of the antenna 51, the conductor thin films 51a and 51b are arranged to face each other with an insulator layer 54 interposed therebetween.

When electrically looking at the battery end where the conductor thin films 51a and 51b face each other with the insulator layer 54 interposed therebetween, the conductor layers are arranged facing each other with the insulator layer interposed therebetween. The conductor thin films 51a and 51b are equivalent to a capacitor that becomes an electrode plate. Therefore, in the high frequency band, the conductor thin film 51
a and 51b can be completely regarded as one conductor plate.

As shown in FIG. 4A, the positive electrode terminal 52 and the negative electrode terminal 52 are attached around the antenna 51 so as to extend from the battery cell to the outside. With such a structure, the antenna 51 and the electrode terminal 52 are arranged to face each other with the insulator layer interposed therebetween, and function as a first capacitor or a third capacitor. It is not necessary to separately connect a capacitor element to the wireless device when implementing the wireless device. FIG. 4 (c-1) illustrates the antenna 51 shown in FIG. 4 (a).
And a sectional view taken along line BB 'of the battery cell. As in FIG. 4 (b-1), the battery cell 53 is
1, an insulator layer 54 is interposed between the battery cell 53 and the antenna 51 to insulate the battery cell 53 and the antenna 51. The electrode terminals 52 extend from the battery cells 53 to the outside.

FIG. 4 (c-2) further illustrates the antenna 51.
FIG. 5 is an enlarged cross-sectional view of a cross-section of an end (a portion circled in FIG. 4C-1). At the end of the antenna 51, the insulator layer 5
The conductive thin films 51a and 51b are arranged so as to face each other with the interposition of the conductive thin films 51a and 51b. The conductor thin films 51a and 51b sandwich the two insulator layers 54 and the electrode terminals 52.

As described above, when the ends of the battery, in which the conductor thin films 51a and 51b sandwich the two insulator layers 54 and the electrode terminals 52, are electrically viewed, the conductor layers face each other with the insulator layers interposed therebetween. The conductive thin film 51a and the electrode terminal 52, and the conductive thin film 51b and the electrode terminal 52 are equivalent to two capacitors each serving as an electrode plate.

That is, the antenna 51 is connected to the insulator layer 54
And a portion (capacitor portion) in which the antenna terminal and the electrode terminal are arranged to face each other with the battery cell 53 interposed therebetween.
Are connected to the antenna 51 via a capacitor. This capacitor is
Or the third capacitor. Therefore, if the battery cell and the antenna according to the present embodiment using the antenna 51 having a portion (capacitor portion) in which the electrode terminal and the antenna terminal face each other with the insulator layer 54 interposed therebetween are used, the present invention is realized. The first in implementing
It is not necessary to separately connect a capacitor element to the battery as the third capacitor or the third capacitor.

A battery having a portion (capacitor portion) in which an antenna and an electrode terminal are arranged to face each other with an insulator layer interposed therebetween at the periphery of such a battery cell, first has a flat battery cell with an electrode terminal. Is attached to the end of the battery cell in parallel with the flat surface of the battery cell. Next, one or two laminated films including an insulator layer such as a thermoplastic resin film and a conductor thin film are used, and the laminate film is formed on the battery cell side such that the insulator layer and the outermost layer become the conductor thin film. Place it on both sides of the cell and sandwich the battery cell,
The electrode terminal extends from the side of the flat surface of the battery cell. Next, if necessary, an electrolytic solution or the like is injected into the battery cell, and finally, the opening of the laminate film is heated, heat-sealed, and sealed to obtain a laminate film. (Embodiment 5) One structural example of a battery cell and an antenna used in the present invention will be described below with reference to FIG. FIG. 5 is a sectional view showing the structure of the battery cell and the antenna of the wireless device of the present invention.

FIG. 5A is a perspective view showing the appearance of an antenna surrounding a battery cell. The antenna 55 is a flat antenna in which a flat battery cell is surrounded by being sandwiched from both sides, and the battery cell is sealed by sealing around the periphery of the battery cell. An insulator layer is interposed between the battery cell and the antenna 55 to insulate the battery cell from the antenna 55. The positive and negative electrode terminals 56 are attached to the flat surface of the antenna 55 so as to extend from the battery cells to the outside.

The insulator layer has a structure like the insulator layer 42 in FIG. The outer shape of the antenna 55 is a flat shape similar to the antenna 43 in FIG. Further, as the conductor thin film constituting the antenna 55, a conductor thin film as used for the antenna 43 in FIG. 3 can be mentioned. As a configuration of the battery cell, a configuration such as the battery cell 41 in FIG. 3 is exemplified.

FIG. 5B-1 is a cross-sectional view taken along the line CC 'of the antenna 55 and the battery cell shown in FIG. 5A. The battery cell 57 is covered with the antenna 55, and an insulator layer 58 is interposed between the battery cell 57 and the antenna 55 to insulate the battery cell 57 and the antenna 55. An electrode terminal 56 extends outward from the battery cell 57 on its flat surface.

FIG. 5B-2 is an enlarged cross-sectional view of the flat surface of the antenna 55 and the battery cell 57 (the part circled in FIG. 5B-1). The portion from which the electrode terminal 56 is taken out is filled with an insulator 59 such as a polymer adhesive to prevent the battery cell 57 component from flowing out and to prevent the antenna 55 from contacting the electrode terminal 56. Preventing. The antenna 55 and the electrode terminal 56 are arranged inside the battery so that a part thereof faces each other with the insulator layer 58 interposed therebetween. With such an arrangement, the conductor layers are arranged to face each other with the insulator layer interposed therebetween, and the electrode terminals 5
6 and the antenna 55 are equivalent to a capacitor serving as an electrode plate.

That is, the antenna 55 is connected to the insulator layer 58
And a portion (capacitor portion) that is arranged to face the electrode terminal 56 through the capacitor 55. The positive electrode and the negative electrode of the battery cell 57 are each connected to the antenna 55 via a capacitor. This capacitor thus acts as a first capacitor or a third capacitor. Therefore, if the battery cell and the antenna according to the present embodiment having a portion (capacitor portion) in which the antenna 55 is arranged to face the electrode terminal 56 via the insulator layer, There is no need to separately connect a capacitor element to the battery as the first capacitor or the third capacitor.

Such a battery having a portion (capacitor portion) in which the antenna and the electrode terminal are arranged to face each other via the insulator layer on the flat surface of the battery is manufactured, for example, by the following procedure. First, an electrode terminal is attached to a flat battery cell on a flat surface of the battery cell. At this time, the electrode terminal is in contact with the insulator layer so that a part thereof is substantially parallel inside the battery. On the other hand, a hole for taking out electrode terminals is provided in advance on a laminate film including an insulator layer such as a thermoplastic resin film and a conductor thin film.
The battery cells are sandwiched between the laminated films provided with the holes. At this time, the insulator layer on the battery cell side, a laminate film is arranged so that the outermost layer becomes a conductive thin film,
The electrode terminal is taken out from the hole for taking out the electrode terminal.
Further, the gap in the hole is closed with an insulator such as a polymer resin. Next, if necessary, inject an electrolyte or the like into the battery cell,
Further, it can be obtained by heat-sealing the opening around the battery by a method such as heat-sealing and sealing. (Embodiment 6) An embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a schematic diagram showing the configuration of the wireless device of the present invention. FIG. 6A is a schematic diagram showing the configuration of the wireless device.
FIG. 6B is a schematic view showing the appearance of the antenna arranged on the circuit board of FIG. 6A as viewed from the board side. FIG. 7 is a schematic view of a high-frequency element arranged in the antenna of FIG.

As shown in FIG. 6A, a substrate 61, a radio circuit 62, an antenna 63 made of a conductive thin film, and a battery cell (not shown) surrounded by the antenna 63 are connected to the second capacitor 23. Except that a high frequency element was used instead of
It has the same outer shape as the substrate 21, the wireless circuit 22, the battery cell, and the antenna 23 of the second embodiment, and is similarly arranged and connected.

That is, the outer shape of the antenna 63 surrounding the battery cell is flat as in the first embodiment. Further, the flat antenna 63 is disposed so that its flat surface is substantially parallel to the substrate 61, as in the first embodiment. As a result, the conductive thin film forming the antenna 63 is flat and arranged substantially parallel to the substrate 61.

On the outer surface of the antenna 63, a positive terminal 64 and a negative terminal 65 connected to the positive and negative electrodes of the battery cell extend.

The positive terminal 64 is connected to a power supply line 66, and the power supply line 66 is further connected to the DC current input terminal 6 of the radio circuit.
At 7, it is connected to the wireless circuit 62. An inductance 68 is connected to the power supply line 66 in series. Also,
The radio circuit 62 is connected to the substrate 6 at the DC current output terminal 69.
For example, it is connected to one ground using a conductor element 70. The negative terminal 65 is connected to the ground of the substrate 61 using, for example, the conductor element 71. Thereby, the battery cell and the wireless circuit 62 are connected in a DC manner, and a DC current can be supplied from the battery cell to the wireless circuit 62.

On the other hand, a signal line 72 connecting the positive terminal 64 and the antenna 63 is connected to the positive terminal 64.
A first capacitor 73 is connected in series between the positive terminal 64 of the signal line 72 and the antenna 63. Further, a signal line 75 connecting the positive terminal 64 and the high-frequency signal terminal 74 of the wireless circuit 62 is connected to the positive terminal 64.
A high frequency element 76 is connected in series as a second capacitor between the positive terminal 64 of the signal line 75 and the high frequency signal terminal 74. Thereby, the antenna 63 and the radio circuit 6
2 will be connected and integrated in the high frequency band,
High-frequency signals can be transmitted or received between the antenna 63 and the wireless circuit 62.

A signal line 77 connecting the negative terminal 65 and the antenna 63 is connected to the negative terminal 65, and a third capacitor is connected in series between the negative terminal 65 of the signal line 77 and the conductive thin film of the antenna 63. 78 may be arranged.

The portable wireless device is constructed by housing the circuit board having the above-described configuration in a case for a portable wireless device.

FIG. 6B is a schematic view showing the appearance of the antenna 63 of FIG. 6A as viewed from the substrate 61 side. In the wireless device, the high frequency element 75 is provided on the surface of the antenna 63 on the substrate 61 side as shown in FIG.

FIG. 7 shows a schematic diagram of the high-frequency element 76. As shown in FIG. 7, the high-frequency device 76 is a device in which a plurality of strip lines 80 are arranged on a flat dielectric layer 79 so as to be substantially parallel to each other. Strip line 80
Are connected in terms of high frequency, but are not connected in terms of direct current, and thus exhibit the same operation as the second capacitor.
The strip line 80 is connected to the positive terminal 6 by the signal line 75.
4 and the wireless circuit 62.

The high frequency element 76 is arranged on the surface of the antenna 63 so that a plurality of strip lines 80 are arranged in parallel on the antenna 63 via the dielectric layer 79. The length of the strip line 80 may be set to be about half a wavelength of the operating frequency of the wireless device.

According to the present embodiment, not only the operation and effect of the second embodiment but also the frequency other than the operating frequency is cut by installing the high-frequency element on the signal line, and only the signal in the operating frequency band passes through this element. It is possible to do. That is, by installing the high-frequency element, it becomes possible to form a filter for a high-frequency signal, which has been arranged at the high-frequency signal terminal of the wireless circuit, on the surface of the conductive thin film.

By providing the above-described high-frequency element, it is possible to operate as an element having both the operation of the third capacitor and the operation of the high-frequency filter built in the radio circuit, and to provide a high-performance radio apparatus with little noise. Obtainable. (Embodiment 7) An embodiment of the present invention will be described with reference to FIG.
FIG. 8 is a schematic diagram illustrating a wireless device of the present invention. FIG.
(A) is the schematic diagram of the wireless device. FIG. 8B shows FIG.
It is the schematic which shows the external appearance of the antenna arrange | positioned at the board | substrate of (a).

As shown in FIG. 8A, an antenna 83 which is the same as the antenna 23 of the second embodiment except for the substrate 81, the radio circuit 82, the outer shape of the antenna and the positions of the electrode terminals, and is surrounded by the antenna 83. The battery cell (not shown) is the substrate 21, the wireless circuit 22, the battery cell, and the antenna 23 of the second embodiment.
It is arranged and connected in the same way.

That is, on the outer surface of the antenna 83, a positive terminal 84 and a negative terminal 85 connected to the positive and negative electrodes of the battery cell extend.

The positive terminal 84 is connected to a power supply line 86, and the power supply line 86 is further connected to the wireless circuit 82 at a DC current input terminal 87 of the wireless circuit 82. An inductance 88 is connected to the power supply line 86 in series. The wireless circuit 82 is connected to the DC current output terminal 8 of the wireless circuit 82.
9, the conductor element 90 is connected to the ground of the substrate 81.
It is connected using. The negative terminal 85 is connected to the ground of the substrate 81 using, for example, a conductor element 91. Thus, the battery cell and the wireless circuit 82 are connected in a DC manner, and a DC current can be supplied from the battery cell to the wireless circuit 82.

On the other hand, a signal line 92 for connecting the positive electrode terminal 84 and the conductor thin film of the antenna 83 is connected to the positive electrode terminal 84. A first capacitor 93 is connected in series between the positive terminal 84 of the signal line 92 and the conductor thin film of the antenna 83. Further, the positive electrode terminal 84
A signal line 95 for connecting the radio signal terminal 94 of the wireless circuit 82 to the signal line 95 is connected. A second capacitor 96 is connected in series between the positive terminal 84 of the signal line 95 and the high-frequency signal terminal 94. As a result, the antenna 83 and the wireless circuit 82 are connected and integrated in a high frequency band, and a high-frequency signal can be transmitted or received between the antenna 83 and the wireless circuit 82.

A signal line 97 connecting the negative electrode terminal 85 and the conductor thin film of the antenna 83 is connected to the negative electrode terminal 85,
Further, a third capacitor 98 may be arranged in series with the negative terminal 85 of the signal line 97 and the conductor thin film of the antenna 83.

In this embodiment, the outer shape of the antenna 83 is flat, and the antenna 83 is arranged so that its flat surface is substantially parallel to the substrate 81. Thereby, the conductive thin film forming the antenna 83 is arranged so as to be substantially parallel to the substrate 81. Further, the shortest distance h between the antenna 83 and the substrate 81 is separated by a distance of 1/30 or more of the wavelength of the operating frequency of the antenna. As a result, more energy is radiated than energy lost due to the conductor loss of the antenna, and the performance of the antenna can be maintained high.

The outer shape of the antenna 83 is the same as that shown in FIG.
As shown in (b), the total length r of the sides of the flat surface is configured to be a rectangle that is almost half the wavelength at the operating frequency. At this time, by making the shape of the flat surface of the antenna 83 rectangular and making it as close to a square as possible, the frequency characteristics when operating as an antenna can be made wider.

The positive terminal 84 and the negative terminal 85 are disposed near the flat surface of the antenna 83. This makes it possible to lower the resonance frequency of the antenna.

The positive terminal 84 and the negative terminal 85 are
The frequency characteristic and the gain of the antenna can be maximized by setting the position to be connected to 1 to the end of the substrate 81.

The portable wireless device is configured by housing the circuit board having the above-described configuration in a case for a portable wireless device.

According to the present embodiment, not only the operation and effect of the second embodiment but also the antenna can operate effectively. The above-mentioned antenna is equivalent to the structure of the flat inverted F antenna. (Embodiment 8) An embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a schematic diagram showing a wireless device of the present invention.

As shown in FIG. 9, an antenna 103 similar to the antenna 23 of the second embodiment except for the substrate 101, the radio circuit 102, the outer shape of the antenna and the positions of the electrode terminals, and the battery cells surrounded by the antenna 103 (Not shown) is the substrate 21, the wireless circuit 22, the battery cell, and the antenna 2 of the second embodiment.
3 are arranged and connected in the same manner.

That is, on the outer surface of the antenna 103, the positive terminal 104 and the negative terminal 105 connected to the positive and negative terminals of the battery cell extend.

The positive terminal 104 is connected to a power line 106, and the power line 106 is further connected to the wireless circuit 102 at a DC current input terminal 107 of the wireless circuit 102. An inductance 108 is connected in series with the power supply line 106. The wireless circuit 102 is the wireless circuit 10
The second DC current output terminal 109 is connected to the ground of the substrate 101 using, for example, a conductor element 110.
The negative terminal 105 is connected to the ground of the substrate 101 using, for example, the conductor element 111. Thus, the battery cell and the wireless circuit 102 are connected in a DC manner, and a DC current can be supplied from the battery cell to the wireless circuit 102.

On the other hand, the positive terminal 104 is connected to the positive terminal 104.
4 and the signal line 112 connecting the antenna 103 are connected. The positive terminal 104 of the signal line 112 and the antenna 10
A first capacitor 113 is connected in series between the three capacitors. Further, a signal line 115 connecting the positive terminal 104 and the high-frequency signal terminal 114 of the wireless circuit 102 is connected to the positive terminal 104. Positive terminal 1 of signal line 115
A second capacitor 116 is connected in series between the terminal 04 and the high-frequency signal terminal 114. As a result, the antenna 103 and the wireless circuit 102 are connected and integrated in a high frequency band, and the antenna 103 and the wireless circuit 102 are integrated.
A high-frequency signal can be transmitted or received between them.

The negative terminal 105 is connected to the negative terminal 105.
A signal line 117 connecting the antenna 103 and the third capacitor 118 may be arranged in series between the negative terminal 105 of the signal line 117 and the antenna 103.

In this embodiment, the outer shape of the antenna 103 is flat, and the antenna 103 is arranged so that its flat surface is substantially parallel to the substrate 101. Thereby, the conductive thin film forming the antenna 83 is arranged so as to be substantially parallel to the substrate 81. Further, the shape of the flat surface of the antenna 103 is rectangular, and at least one pair of sides parallel to each other has a rectangular shape whose length is substantially half the wavelength at the operating frequency. Thereby, the frequency characteristic when operating as an antenna can be widened. Further, at this time, by making the shape of the flat surface of the antenna 103 as close to a square as possible, the frequency characteristics can be made wider.

The positive electrode terminal 104 may be disposed substantially on a line that divides the length L of the flat surface of the antenna 103 in the longitudinal direction into three equal parts. As a result, the impedance of the antenna becomes approximately 50Ω, so that it is easy to match the impedance of the feed line.

The negative electrode terminal 105 may be arranged substantially at the center of the flat surface of the antenna 103. This allows the negative electrode terminal 10 to be maintained without changing the antenna characteristics.
5 can be connected to the ground of the substrate 101.

The portable wireless device is constructed by housing the circuit board having the above-described configuration in a case for a portable wireless device.

According to this embodiment, not only the operation and effect of the second embodiment but also the antenna can be operated effectively. In the above-mentioned antenna, the structure of the antenna in this case is equivalent to the structure of the microstrip antenna.

[0108]

As described above, according to the present invention, the antennas can be integrated without greatly deteriorating the performance, and the size of the radio apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram illustrating a wireless device of the present invention.

FIG. 2 is a schematic diagram illustrating a wireless device of the present invention.

FIG. 3 is a cross-sectional view illustrating an antenna of the wireless device of the present invention.

FIG. 4 is a schematic diagram showing an antenna of the wireless device of the present invention.

FIG. 5 is a schematic diagram showing an antenna of the wireless device of the present invention.

FIG. 6 is a schematic diagram showing a wireless device of the present invention.

FIG. 7 is a schematic view of a high-frequency device used in an embodiment.

FIG. 8 is a schematic diagram illustrating a wireless device of the present invention.

FIG. 9 is a schematic diagram showing a wireless device of the present invention.

FIG. 10 is a schematic diagram showing a conventional wireless device.

[Explanation of symbols]

1, 21, 61, 81, 101, 121 ... substrate, 2, 22, 62, 82, 102, 122 ... wireless circuit, 3, 23, 63, 83, 103, 125 ... antenna 4, 24, 64, 84, 104: Positive terminal 5, 25, 65, 85, 105 ... Negative terminal 6, 26, 66, 86, 106, 124 ... Power supply line 7, 27, 67, 87, 107 ... DC current input terminal 8, 29, 69, 89, 109 ... DC current output terminals 9, 10, 30, 31, 70, 71, 90, 91, 11
0, 111: Conductive element 12, 32, 35, 37, 72, 75, 77, 92, 9
5, 97, 112, 115, 14, 117, 126 ... signal line 11, 28, 68, 88, 108 ... inductance 13, 34, 74, 94, 114 ... high-frequency signal terminal 33, 73, 93, 113 ... first ... capacitors 36, 96, 116 ... second capacitors 38, 78, 98, 118 ... third capacitors 41, 53, 57 ... battery cells 42, 54, 58 ... insulator layers 43, 51, 55 ... antennas 44 ... Positive electrode 45 ... Negative electrode 46 ... Separator 47 ... Positive electrode terminal 48 ... Negative electrode terminal 51a, 51b ... Conductor thin film 52, 56 ... Electrode terminal 59 ... Insulator 76 ... High frequency element 79 ... Dielectric layer 80 ... Strip line 123 ... Battery,

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Norio Takami 72 Horikawa-cho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture Inside the Toshiba Kawasaki Plant (72) Inventor Takahisa Osaki 72 Horikawa-cho, Saiwai-ku, Kawasaki City, Kanagawa Prefecture Stock Association F-term in Toshiba Kawasaki Office (reference) 5J046 AA07 AA12 AB00 PA07 5K011 AA06 AA08 AA16 DA02 JA01 JA03

Claims (6)

[Claims] 1. A substrate having at least a ground; a battery cell having at least a positive electrode and a negative electrode, wherein the positive electrode is connected to a power supply line and the negative electrode is connected to the ground of the substrate; A conductive thin film surrounding the battery cell, disposed substantially parallel to the substrate, and connected to a signal line; and having a direct current input / output terminal and a high frequency signal terminal, wherein the direct current input / output terminal is Ground of the substrate and connected to the power supply line to receive supply of DC current from the battery cell, and the high-frequency signal terminal is connected to the signal line to transmit or receive a high-frequency signal to the antenna. And a wireless circuit for performing the operation. 2. The wireless device according to claim 1, wherein the antenna further comprises the conductive thin film connected to a negative electrode of the battery cell or a ground of the substrate at least in high frequency. 3. A substrate having at least a ground; a battery cell having at least a positive electrode and a negative electrode, wherein the positive electrode is connected to a power line and a signal line, and the negative electrode is connected to the ground of the substrate; The conductive thin film surrounds the battery cell, is disposed substantially parallel to the substrate,
An antenna connected to the positive electrode via a capacitor; having a DC current input / output terminal and a high-frequency signal terminal;
The DC current input / output terminal is a ground of the substrate,
Inductance is connected to the power supply line connected in series and receives supply of DC current from the battery cell, and the high-frequency signal terminal is connected to the signal line connected in series with a second capacitor to the antenna. A radio circuit for transmitting or receiving a high-frequency signal. 4. The radio apparatus according to claim 3, wherein said antenna further comprises said conductive thin film connected to said negative electrode via a third capacitor. 5. The antenna has a flat surface, the total length of the sides of the flat surface is substantially the same as a half wavelength at a used frequency, and the antenna is provided on a positive electrode terminal provided on the positive electrode and on the negative electrode. 4. The antenna according to claim 1, wherein the negative electrode terminal is disposed substantially on a side of a flat surface of the antenna.
A wireless device as described. 6. The antenna has a flat surface, and the shape of the flat surface is rectangular, and the length of at least one set of parallel sides is substantially the same as a half wavelength at a used frequency.
The negative electrode terminal provided on the negative electrode is disposed substantially at the center of the flat surface of the antenna, and the positive electrode terminal provided on the positive electrode is on a line that divides the length of the antenna in the longitudinal direction into approximately three equal parts. The wireless device according to claim 1, wherein the wireless device is arranged.