JP2011259513A - Wireless device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure antenna characteristics by forming an antenna element on the surface of a housing of a wireless device made of a dielectric material.SOLUTION: A first housing 11 of a wireless device is formed by an upper member 11a and a lower member 11b that are both made of a dielectric material and are engaged in a vertical direction. A substrate 16, having a not-shown wireless circuit mounted thereon and having a feeding line composed of a conductor pattern provided thereon, is embedded in the first housing 11. An antenna element 18 made of a dielectric material is formed on the inner surface of the upper member 11a via an adhesion layer 17 made of a dielectric material. The antenna element 18 is connected to the wireless circuit through the feeding line of the substrate 16 by a connection member 19 such as a spring connector. A coating layer 20 made of a dielectric material is provided so as to cover the outer surface of the upper member 11a entirely or partially.

Description

  The present invention relates to a radio apparatus, and more particularly to a radio apparatus used for mobile communication.

  There is known an antenna component that is three-dimensionally configured by mounting an antenna element on the surface of a dielectric substrate. Such an antenna component is directly mounted on a housing or a circuit board of a small wireless device such as a mobile phone and used as a built-in antenna. Such an antenna component may be referred to as an MID type antenna by abbreviating Molded Interconnect Device because of the characteristics of its form.

  The MID antenna is an antenna configured as a small module part, and can be attached to a wireless device in the same manner as other general parts. However, there is a limit to the resin that can be formed, such as whether it can be two-color molded or can be easily plated. It is a separate part. Therefore, in order to further reduce the number of parts and simplify the process, it is desirable to form an antenna element on the surface (inner surface or outer surface) of the casing of the wireless device instead of using the MID antenna. Generally, when an antenna is installed in a wireless device, the influence of metal parts around the antenna cannot be ignored and fine adjustment is necessary. When an antenna is manufactured with a mold such as an MID antenna, a long period of fine adjustment is required. In addition, there is a problem that a plurality of molds are required and the initial investment until mass production of the antenna is enormous.

  A technique of forming a conductor pattern on a part of a casing of a wireless device, connecting it to a feeding point, and operating as an antenna has been conventionally known (for example, see Patent Document 1).

  In the above-mentioned Patent Document 1, one casing of the foldable portable wireless communication device is made of a conductive material or made of an insulating material, and a conductor layer is formed on the surface to form a part of the hinge. A technique of a built-in antenna is described in which it is operated as a part of an antenna by being connected to a feeding point through a conductor portion.

Japanese Patent Laying-Open No. 2005-295578 (pages 2, 6, 7 and FIG. 1)

  Among the conventional techniques described in Patent Document 1 described above, the technique for forming the conductor layer for the antenna element on the surface of the casing made of an insulating material is more than the technique for forming the casing itself with a conductive material. Is also advantageous in terms of cost. However, Patent Document 1 does not disclose specific details on how to form an antenna element on the surface of a casing made of an insulating material to ensure antenna characteristics.

  The present invention has been made to solve the above problems, and an object thereof is to ensure the characteristics of an antenna including an antenna element formed on the surface of a casing made of a dielectric material which is an insulator.

  In order to achieve the above object, a wireless device according to claim 1 is formed with a member made of a first dielectric material and has a coating made of a second dielectric material on one surface of the member. A housing having a built-in wireless circuit and a conductive material, disposed on the surface of the member provided with the covering portion and electrically connected to the wireless circuit, And an antenna element that is at least partially covered by the covering portion.

  According to the present invention, characteristics of an antenna including an antenna element can be ensured.

The perspective view showing the appearance of the radio equipment concerning the first example of the present invention. FIG. 2 is an internal cross-sectional view of a housing that constitutes the wireless device illustrated in FIG. 1. The perspective view showing the external appearance of the radio | wireless apparatus which concerns on the 2nd Example of this invention. FIG. 4 is an internal cross-sectional view of a housing that constitutes the wireless device illustrated in FIG. 3. FIG. 5 is an internal cross-sectional view of a casing of a wireless device according to a configuration corresponding to a hybrid of the configurations illustrated in FIGS. 2 and 4. The figure which calculates | requires and represents the radiation efficiency of the antenna containing the antenna element of the radio | wireless apparatus which concerns on the first Example of this invention by the simulation assumed that the relative dielectric constant of the member for housing | casing is 4. FIG. The figure which calculates | requires and represents the radiation efficiency of the antenna containing the antenna element of the radio | wireless apparatus which concerns on the 1st Example of this invention by the simulation assumed that the relative dielectric constant of the member for housing | casings is 2.4.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. In addition, when referring to the following figures, up, down, left, right, horizontal, vertical (vertical) means up, down, left, right, horizontal, vertical (vertical) on the paper on which the figure is represented, unless otherwise specified. . Moreover, the same code | symbol shall represent the same structure between each figure.

  FIG. 1 is a perspective view showing an appearance of a wireless device 1 according to the first embodiment of the present invention. The wireless device 1 is configured by connecting a first housing 11 and a second housing 12 through a connection unit 13 so as to be opened and closed. FIG. 1 shows a state in which the first housing 11 and the second housing 12 are closed to each other. The first housing 11 includes an auxiliary display unit 14 made of, for example, a liquid crystal device.

  FIG. 2 is an internal cross-sectional view of the first housing 11 represented as an AA arrow view in FIG. 1. The first housing 11 is formed by engaging an upper member 11a and a lower member 11b, both of which are made of a dielectric material, in the vertical direction. The first housing 11 incorporates a substrate 16 on which a wireless circuit (not shown) is mounted and a feed line made of a conductor pattern is provided.

  An antenna element 18 made of a conductive material is formed on the inner surface of the upper member 11a via an adhesive layer 17 made of a dielectric material. The antenna element 18 is connected to a wireless circuit through a feed line of the substrate 16 by a connection member 19 such as a spring connector.

  In order to form a conductor pattern on the surface of a dielectric material, a method is known in which the surface is chemically roughened by a method such as etching and a plating film is attached by a so-called anchoring effect. However, in a small wireless device such as a mobile phone, for example, a dielectric material having high mechanical strength is used for the housing base material in response to the demand for thinning the housing. It may not be possible.

  Therefore, instead of performing etching on the inner surface of the upper member 11a, for example, types (acrylic, alkyd, urethane, epoxy, etc.) used as a coating film for undercoating that covers all or at least a part thereof An adhesive layer 17 is provided, and a medium mixed with a plating catalyst (ink) is printed on the surface in accordance with the shape of the antenna element 18. In order to grow the plating with the above catalyst, the antenna element 18 made of a conductor pattern can be formed by first activating by etching (but different from the etching for obtaining the anchor effect) and performing electroless plating. . Alternatively, after electroless plating, electrolytic plating may be performed in order to thicken the plating in a short time.

  Thus, by arranging the antenna element 18 on the adhesive layer 17, the number of parts can be reduced, there is no variation when mounting the parts, and a plurality of antenna elements can be formed at the same time in one process. The initial cost can be reduced by eliminating the need for a mold, and the lead time can be shortened by fine adjustment. In addition, compared with the case where the antenna element 18 is directly arranged on the inner surface of the upper member 11a, the resin material of the upper member 11a is highly selective (a wide range of selection) through the adhesive layer 17. is there.

  A covering layer 20 made of a dielectric material is provided so as to cover all or part of the outer surface of the upper member 11a. The coating layer 20 is made of a curable resin, for example, and is a design surface coating used for finishing the outer surface of the wireless device 1. The covering layer 20 may be an exterior panel made of, for example, a transparent or translucent resin, or a design surface formed by two-color molding.

  FIG. 3 is a perspective view showing the appearance of the wireless device 2 according to the second embodiment of the present invention. The wireless device 2 is configured by connecting a first housing 21 and a second housing 22 via a connection unit 23 so as to be opened and closed. FIG. 3 shows a state in which the first housing 21 and the second housing 22 are closed to each other. The first housing 21 includes an auxiliary display unit 24 made of, for example, a liquid crystal device. An antenna element 25 made of a conductor pattern is formed on the outer surface of the first housing 21.

  FIG. 4 is an internal cross-sectional view of the first housing 21 represented as a view along arrow AA in FIG. 3. The first casing 21 is formed by engaging an upper member 21a and a lower member 21b, both of which are made of a dielectric material, in the vertical direction. The first housing 21 incorporates a substrate 26 on which a wireless circuit (not shown) is mounted and a feed line made of a conductor pattern is provided.

  On the outer surface of the upper member 21a, the above-described antenna element 25 is formed via an adhesive layer 27 made of a dielectric material covering all or at least a part thereof. The antenna element 25 is connected to a wireless circuit through a feed hole of the substrate 26 through a via hole penetrating between the outer surface and the inner surface of the upper member 21a by a connection member 29 such as a plate spring or a spring connector formed of sheet metal, for example. The Or you may connect the front and back, ie, the board | substrate 26 side, and the coating layer 30 side mentioned later, without penetrating the upper member 21a.

  The adhesive layer 27 is a kind of dielectric material used as a coating film for undercoating that covers all or at least a part, for example, like the adhesive layer 17 of the first embodiment. In order to print a medium mixed with a plating catalyst (ink) in accordance with the shape of the antenna element 25 on the surface of the adhesive layer 27 and grow the plating with the above catalyst, first etching (however, the above-mentioned etching to obtain the anchor effect) The antenna element 25 made of a conductor pattern can be formed by performing electroless plating after activation. Alternatively, after electroless plating, electrolytic plating may be performed in order to thicken the plating in a short time.

  A coating layer 30 made of a dielectric material is provided on the outer surface of the upper member 21 a so as to cover all or at least a part of the antenna element 25. The covering layer 30 is made of a curable resin, for example, and is a design surface coating used for finishing the outer surface of the wireless device 1. The covering layer 30 may be an exterior panel made of, for example, a transparent or translucent resin, or a design surface formed by two-color molding.

  Thus, by arranging the antenna element 25 on the adhesive layer 27, the number of parts can be reduced, there is no variation when mounting the parts, and a plurality of antenna elements can be formed at the same time in one process. By forming the antenna element 25, the antenna element 25 can be separated from the substrate 26, the actual antenna volume can be increased by the thickness of the upper member 21a, and the antenna efficiency can be improved and the bandwidth can be increased. Furthermore, if realized by printing, the initial cost can be reduced by eliminating the need for a mold, and the lead time can be shortened by fine adjustment. In addition, compared with the case where the antenna element 25 is directly disposed on the outer surface of the upper member 21a, the resin material of the upper member 21a is highly selective (a wide range of selection) through the adhesive layer 27. is there.

  FIG. 5 is another example of an internal cross-sectional view of the first housing 21 shown as an AA arrow view in FIG. 3, and has a configuration corresponding to a hybrid of the configurations shown in FIGS. 2 and 4. To express. Reference numerals 17 to 19 in the figure are the same as those in FIG. Further, reference numerals 21, 21a, 21b, 25 to 27, and 30 in the figure are the same as those in FIG.

  In FIG. 5, an antenna element 18 made of a conductive material is formed on the inner surface of the upper member 21a via an adhesive layer 17 made of a dielectric material. The antenna element 18 is connected to the radio circuit of the substrate 26 as in FIG. An antenna element 25 is formed on the outer surface of the upper member 21a via an adhesive layer 27 made of a dielectric material. The antenna element 25 is connected to the radio circuit of the substrate 26 as in FIG.

  That is, FIG. 5 shows a configuration in which the antenna elements 18 and 25 are formed on the inner surface and the outer surface of the upper member 21a via the adhesive layers 17 and 27, respectively. The antenna element 25 may be supplied with power in common with the antenna element 18 through a via hole penetrating between the outer surface and the inner surface of the upper member 21a (not shown), or may be supplied to the substrate 26 by another connection member (not shown). It may be connected to a radio circuit. For example, the front and back, that is, the substrate 26 side and the coating layer 30 side may be connected without penetrating the upper member 21a. The wireless circuit to which the antenna element 18 is connected and the wireless circuit to which the antenna element 25 is connected may belong to the same system or may belong to separate systems. A plurality of antenna elements may be arranged close to each other.

  Thus, by arranging the antenna element 25 on the adhesive layer 27, the number of parts can be reduced, there is no variation when mounting the parts, and a plurality of antenna elements can be formed at the same time in one process. By forming the antenna element 25, the antenna element 25 can be separated from the substrate 26, the actual antenna volume can be increased by the thickness of the upper member 21a, the antenna efficiency is improved, the bandwidth is increased, and the inner surface of the upper member 21a is further increased. In addition, since the antenna element 18 can be formed, the degree of freedom in design increases, and the possibility that a plurality of antenna elements can be brought close to each other increases. Furthermore, if realized by printing, the initial cost can be reduced by eliminating the need for a mold, and the lead time can be shortened by fine adjustment. In addition, the selectivity of the resin material of the upper member 21a is higher by using the adhesive layer 27 or 17 than when the antenna element 25 or 18 is directly arranged on the outer surface or inner surface of the upper member 21a (selection width). Has the advantage of being wide).

  With reference to FIG.6 and FIG.7, an example of the result of having evaluated the relationship between the characteristic of the dielectric material of the radio | wireless apparatus 1 which concerns on the fundamental structure of this invention, and an antenna characteristic with simulation is demonstrated. FIG. 6 shows the relative permittivity of the adhesive layer 17 (with the relative permittivity of the dielectric material of the upper member 11a included in the configuration of the wireless device 1 being 4 and the relative permittivity of the covering layer 20 being 1 to 15). It is a figure which calculates | requires and represents the radiation efficiency of the antenna containing the antenna element 18 with respect to 1 to 15) by simulation.

  Note that the resonance frequency of the antenna element 18 changes within the range of 2 GHz to 2.5 GHz due to the influence of wavelength shortening by a dielectric close to the antenna element 18. In addition, the relative dielectric constant value (4) of the dielectric material of the upper member 11a is set to the higher value of the relative dielectric constants of the dielectric material that is practical as a casing member of the wireless device.

  The horizontal axis (“inside”) in FIG. 6 represents the relative dielectric constant of the adhesive layer 17 located inside the first housing 11. The vertical axis in the figure represents the radiation efficiency (percentage value). The seven types of plots represent the relative dielectric constants of the coating layers 20 positioned outside the first housing 11, which are represented as “outside” on the right side of the drawing.

  According to FIG. 6, the condition for the radiation efficiency of the antenna including the antenna element 18 to be 70% or more as a guide is that the relative dielectric constants of the adhesive layer 17 and the covering layer 20 are approximately 7 or less, respectively. Recognize. This is because when the relative dielectric constant of the adhesive layer 17 is 7 or less, the radiation efficiency does not fall below 70 percent if the relative dielectric constant of the coating layer 20 is 7 or less.

  From the viewpoint of the radiation efficiency, it is not necessary to set the lower limit of the relative dielectric constant of the adhesive layer 17 and the covering layer 20. When the material of the adhesive layer 17 and the covering layer 20 is selected from practical dielectric materials, the lower limit of the relative dielectric constant is about 2.7.

  FIG. 7 shows the relative dielectric constant (from 1 to 15) of the adhesive layer 17 with the relative dielectric constant of the dielectric material of the upper member 11a as 2.4 and the relative dielectric constant of the coating layer 20 as parameters from 1 to 15. It is a figure which calculates | requires and represents the radiation efficiency of the antenna containing the antenna element 18 by simulation.

  Note that the resonance frequency of the antenna element 18 changes within the range of 2 GHz to 2.5 GHz due to the influence of wavelength shortening by a dielectric close to the antenna element 18. Further, the value (2.4) of the relative dielectric constant of the dielectric material of the upper member 11a was set to the lower value of the relative dielectric constants of the dielectric material practical as a casing member of the wireless device.

  In FIG. 7, as in FIG. 6, the condition for the radiation efficiency of the antenna including the antenna element 18 to be 70% or more as a guide is that the relative dielectric constants of the adhesive layer 17 and the covering layer 20 are approximately 7 or less, respectively. I know that there is.

  In the internal cross-sectional view of the first housing 11 of the wireless device 1 shown in FIG. 2, it can be considered that the antenna element 18 is covered with a coating layer made of a dielectric (air) having a relative dielectric constant of 1. . Further, in the internal cross-sectional view of the first housing 21 of the wireless device 2 shown in FIG. 4, a dielectric (air) having a relative permittivity of 1 is formed on the surface of the first member 21a opposite to where the antenna element 25 is formed. It can be considered that a coating layer made of

  As a result, the dielectric layer of the covering layer 20 in FIG. 2 has a relative dielectric constant of 7 or less with respect to the fact that layers made of a dielectric having a relative dielectric constant of 7 or less are provided on both sides of the housing member on which the antenna element is formed. It can be said that the configuration of the wireless device 1 and the configuration of the wireless device 2 in which the relative dielectric constant of the covering layer 30 in FIG.

  Therefore, the configuration of the wireless device 2 shown in FIG. 4 also includes the antenna element 25 by setting the relative dielectric constants of the adhesive layer 27 and the covering layer 30 to 7 or less as shown in FIG. 6 or FIG. The required radiation efficiency of the antenna can be obtained. In the configuration corresponding to the hybrid of the wireless devices 1 and 2 shown in FIG. 5, the relative dielectric constants of the adhesive layers 17 and 27 and the covering layer 30 are set to 7 or less, respectively, as shown in FIG. 6 or FIG. Thus, the required radiation efficiency of the antenna including the antenna elements 18 and 25 can be obtained. Conventionally, the influence of only a single-layer housing on an antenna element has been confirmed, but has not been confirmed in three or more layers.

  2, 4, or 5, the thickness of the first member 11a or 21a is preferably 0.5 millimeters (mm) or more and 1 mm or less. The reason is as follows. The housing of the wireless device has a function of protecting internal substrates and components. There should be no damage to the enclosure under normal usage. For this purpose, it is necessary to increase the thickness of the casing base material, but in order to cope with the recent thinning of wireless devices, a general method is to strengthen the dielectric material itself so that strength can be obtained even if the casing is made as thin as possible. Is. However, in order to perform injection molding, it is necessary to feed resin into the mold, and if the casing base material is thinned, the resin cannot enter. Further, the reinforced dielectric material has low fluidity and does not penetrate into the inside. Therefore, usually 0.5 mm or more is required.

  2, 4, or 5, the thickness of the adhesive layer 17 or 27 is preferably 5 micrometers (μm) or more and 20 μm or less. The reason is as follows. Since the adhesive layer 17 or 27 is a coating film for undercoating that covers all or at least a part of the inner surface or outer surface of the upper member 21a, it is required to be 5 μm or more in order to eliminate the uncoated portion. Moreover, since the time of the drying process required in order to raise intensity | strength will become long when too thick, it is desirable to set it as 20 micrometers or less.

  2, 4 or 5, the thickness of the coating layer 20 or 30 is preferably 5 micrometers (μm) or more and 20 μm or less. The reason is as follows. Since the coating layer 20 or 30 is a coating film covering all or at least a part of the design surface, 5 μm or more is necessary in order to eliminate a portion that is not coated on the same principle as the adhesive layer 17. Moreover, since the time of the drying process required in order to raise intensity | strength will become long when too thick, it is desirable to set it as 20 micrometers or less.

  According to the embodiment of the present invention described above, in the formation of the antenna element on the surface of the casing of the wireless device, the radiation efficiency characteristics of the antenna including the antenna element can be obtained by selecting the layer configuration and the relative dielectric constant of each layer. Can be secured.

In the above description of the embodiments, the shape, configuration, arrangement, and the like of the members and antenna elements constituting the casing are merely examples, and various modifications can be made without departing from the scope of the present invention. For example, in the embodiment, only the formation of one antenna element for each surface of the housing member has been described, but a plurality of antenna elements can be formed simultaneously regardless of the system. Further, although only one adhesive layer has been described, depending on the dielectric material that is the casing base material, it may be multilayered in order to maintain adhesion. In the description of this patent, there may be a plurality of connecting portions. Moreover, you may connect not only to an antenna electric power feeding part but to the circuit ground as a short circuit element.
The invention described in the scope of the original claims of the original application of the present application will be added below.
[1] A member made of a first dielectric material is formed, a coating layer made of a second dielectric material is provided on one surface of the member, and a wireless circuit is built in. A housing,
An antenna element made of a conductive material and formed on the other surface of the member via an adhesive layer made of a third dielectric material and electrically connected to the radio circuit
A wireless device comprising:

[2] A member made of a first dielectric material is formed, a coating layer made of a second dielectric material is provided on one surface of the member, and a wireless circuit is built in. A housing,
It is made of a conductive material, and is formed on the surface of the member provided with the covering layer via an adhesive layer made of a third dielectric material, and is electrically connected to the wireless circuit, and at least partly An antenna element covered with the covering layer
A wireless device comprising:

[3] It is formed on the surface of the member provided with the covering layer through an additional adhesive layer made of a conductive material and a fourth dielectric material, and is electrically connected to the wireless circuit. The wireless device according to [1], further comprising an additional antenna element that is at least partially covered by the covering layer.

[4] The wireless device according to [1] or [2], wherein the third dielectric material has a relative dielectric constant of 7 or less.
[5] The wireless device according to [1] or [2], wherein each of the second dielectric material and the third dielectric material has a relative dielectric constant of 7 or less.
[6] The member is formed on a surface of the member provided with the coating layer via an additional adhesive layer made of a conductive material and a fourth dielectric material, and is electrically connected to the wireless circuit. And an additional antenna element that is at least partially covered with the covering layer, and the third dielectric material and the fourth dielectric material each have a relative dielectric constant of 7 or less. The wireless device according to [1] or [2].
[7] The member is formed on the surface of the member provided with the covering layer via an additional adhesive layer made of a conductive material and a fourth dielectric material, and is electrically connected to the wireless circuit. And an additional antenna element that is at least partially covered by the covering layer, and the second dielectric material to the fourth dielectric material each have a relative dielectric constant of 7 or less. The wireless device according to [1] or [2].
[8] The thickness of the member of the housing is 0.5 mm or more and 1 mm or less,
The antenna element has a thickness of 10 micrometers or more,
The adhesive layer has a thickness of 5 micrometers to 20 micrometers,
The thickness of the coating layer is 5 micrometers or more and 20 micrometers or less.
The wireless device according to [1] or [2], wherein

[9] The member is formed on a surface of the member provided with the covering layer through an additional adhesive layer made of a conductive material and made of a fourth dielectric material, and is electrically connected to the wireless circuit. And an additional antenna element that is at least partially covered by the covering layer,
The thickness of the member of the housing is 0.5 mm or more and 1 mm or less,
The antenna element and the additional antenna element each have a thickness of 10 micrometers or more,
The adhesive layer and the additional adhesive layer each have a thickness of 5 micrometers to 20 micrometers,
The thickness of the coating layer is 5 micrometers or more and 20 micrometers or less.
The wireless device according to [1] or [2], wherein
[10] The antenna element or the additional antenna element is in close contact with the adhesive layer or the additional adhesive layer through an ink for growing plating. [6] The wireless device according to any one of [9].
[11] A housing formed with a member made of a first dielectric material and provided with a coating layer made of a second dielectric material on one surface of the member;
An antenna element made of a conductive material and formed on the other surface of the member via an adhesive layer made of a third dielectric material
An antenna device comprising:

[12] A housing formed with a member made of the first dielectric material and provided with a coating layer made of the second dielectric material on one surface of the member;
An antenna element made of a conductive material, formed on a surface of the member provided with the covering layer via an adhesive layer made of a third dielectric material, and at least partially covered by the covering layer An antenna device comprising:
[13] The member is formed on the surface of the member provided with the covering layer through an additional adhesive layer made of a conductive material and a fourth dielectric material, and at least a part of the member is covered with the covering layer. The antenna device according to [11], further including an additional antenna element.
[14] The antenna device according to [11] or [12], wherein the third dielectric material has a relative dielectric constant of 7 or less.
[15] The antenna device according to [11] or [12], wherein each of the second dielectric material and the third dielectric material has a relative dielectric constant of 7 or less.
[16] The member is formed on a surface of the member provided with the coating layer through an additional adhesive layer made of a conductive material and a fourth dielectric material, and at least a part of the member is covered with the coating layer. [11] or [12], wherein the third dielectric material and the fourth dielectric material each have a relative dielectric constant of 7 or less. ] The antenna apparatus as described in.
[17] The member is formed on the surface of the member provided with the coating layer via an additional adhesive layer made of a conductive material and a fourth dielectric material, and at least a part of the member is covered with the coating layer. [11] or [12], wherein the second dielectric material to the fourth dielectric material each have a relative dielectric constant of 7 or less. ] The antenna apparatus as described in.
[18] The thickness of the member of the casing is 0.5 mm or more and 1 mm or less,
The antenna element has a thickness of 10 micrometers or more,
The adhesive layer has a thickness of 5 micrometers to 20 micrometers,
The thickness of the coating layer is 5 micrometers or more and 20 micrometers or less.
The antenna device according to [11] or [12], wherein
[19] The member is formed on a surface of the member provided with the coating layer via an additional adhesive layer made of a conductive material and a fourth dielectric material, and at least part of the member is covered with the coating layer. Further comprising an additional antenna element,
The member has a thickness of 0.5 mm or more and 1 mm or less, and the antenna element and the additional antenna element each have a thickness of 10 micrometers or more.
The adhesive layer and the additional adhesive layer each have a thickness of 5 micrometers to 20 micrometers,
The thickness of the coating layer is 5 micrometers or more and 20 micrometers or less.
The antenna device according to [11] or [12], wherein

[20] [11] to [13] or [13], wherein the antenna element or the additional antenna element is brought into close contact with the adhesive layer or the additional adhesive layer through an ink for growing plating. The antenna device according to any one of [16] to [19].

1, 2 Wireless devices 11, 21 First housing 11a, 21a Upper member 11b, 21b Lower member 12, 22 Second housing 13, 23 Connection unit 14, 24 Auxiliary display unit 16, 26 Substrate 17, 27 Adhesive layer 18, 25 Antenna element 19, 29 Connection member 20, 30 Cover layer

Claims (10)

A housing formed with a member made of a first dielectric material and having a covering portion made of a second dielectric material on one surface of the member and having a built-in wireless circuit; ,
An antenna element made of a conductive material, disposed on a surface of the member provided with the covering portion, electrically connected to the wireless circuit, and at least partially covered by the covering portion; A wireless device comprising:   The wireless device according to claim 1, wherein the antenna element is disposed on a surface of the member provided with the covering portion via an adhesive layer made of a third dielectric material.   The wireless device according to claim 2, wherein the third dielectric material has a relative dielectric constant of 7 or less.   The wireless device according to claim 2, wherein each of the second dielectric material and the third dielectric material has a relative dielectric constant of 7 or less.   The radio apparatus according to claim 1, further comprising an additional antenna element made of a conductive material and disposed on the other surface of the member and electrically connected to the radio circuit.   An additional antenna element which is disposed on the other surface of the member via an additional adhesive layer made of a conductive material and made of a fourth dielectric material and which is electrically connected to the radio circuit is further provided. The wireless device according to claim 2, wherein   An additional antenna element which is disposed on the other surface of the member via an additional adhesive layer made of a conductive material and made of a fourth dielectric material and which is electrically connected to the radio circuit is further provided. The wireless device according to claim 2, wherein each of the second dielectric material to the fourth dielectric material has a relative dielectric constant of 7 or less. The thickness of the member of the housing is 0.5 mm or more and 1 mm or less,
The antenna element has a thickness of 10 micrometers or more,
The adhesive layer has a thickness of 5 micrometers to 20 micrometers,
The wireless device according to claim 2, wherein the thickness of the covering portion is not less than 5 micrometers and not more than 20 micrometers. An additional antenna element which is disposed on the other surface of the member via an additional adhesive layer made of a conductive material and made of a fourth dielectric material and which is electrically connected to the radio circuit is further provided. ,
The thickness of the member of the housing is 0.5 mm or more and 1 mm or less,
The antenna element and the additional antenna element each have a thickness of 10 micrometers or more,
The adhesive layer and the additional adhesive layer each have a thickness of 5 micrometers to 20 micrometers,
The wireless device according to claim 2, wherein the thickness of the covering portion is not less than 5 micrometers and not more than 20 micrometers.   The said antenna element or the said additional antenna element is closely_contact | adhered to the said contact bonding layer or the said additional contact bonding layer through the ink which grows plating, The Claim 6 thru | or 4 characterized by the above-mentioned. The wireless device according to claim 9.

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