JP7236581B1 - film antenna - Google Patents

Abstract

Kind Code: A1 A film antenna is provided that prevents dust and foreign matter from entering gaps and suppresses deterioration in the durability of a film portion.
A film antenna has a substrate 100, a first portion (encapsulating portion 206) bonded to the substrate, and a second portion (protruding portion 208) protruding from the substrate, and a film material enclosing the antenna. At least part of the first part of the film material is arranged on the upper surface of the base material, and the lower member 300 has a lower surface to be installed on the installation target surface on which the film antenna is installed, and on the first part of the film material It has a middle member 310 positioned thereon and an upper member 320 positioned on the middle member. A second portion of the film material protrudes from the bottom edge of the substrate.
[Selection drawing] Fig. 13

Description

The present invention relates to film antennas.

Patent Literature 1 describes a film antenna that is attached to a window glass of a vehicle or the like, is composed of a film portion that includes a power supply portion and an antenna, and can be used in various communication systems.
(See Patent Document 1, for example).
[Prior art documents]
[Patent Literature]
[Patent Document 1] JP-A-2006-5400

According to one embodiment of the invention, a film antenna is provided. A film antenna may comprise a substrate. A film antenna may comprise a film material enclosing the antenna. The film material may have a first portion bonded to the substrate and a second portion protruding from the substrate. The base member may have a lower member on which at least part of the first portion of the film material is arranged on the upper surface, and which has a lower surface to be installed on the installation target surface on which the film antenna is installed. The substrate may have a middle member disposed over the first portion of the film material. The substrate may have a top member disposed on the middle member. A second portion of the film material may protrude from the bottom edge of the substrate.

The base member may have a connector disposed on the middle member and wiring electrically connecting the connector and the antenna. At least a portion of the first portion of the film material may be inclined. All of the inclined portions of the first portion of the film material may be arranged on the lower member. The lower member may have a curved end on the side where the film material is arranged and the side where the film material protrudes.

The lower member includes a base, a first stretched portion that is stretched from one end of the base in the direction in which the film material protrudes, and a first stretched portion that extends in the direction in which the film material protrudes from the other end of the base. and a second extension that is extended. The first stretched portion and the second stretched portion may be inclined in the stretching direction, and the inclined portion of the first portion of the film material may be arranged on the upper surface. The first portion of the film material may be arranged entirely on the lower member, and the lower member may be entirely inclined from the upper member toward the installation target surface.

The first portion of the film material includes a portion arranged on the upper surface of the lower member and a portion not arranged on the upper surface of the lower member but arranged on the installation target surface. OK. The wiring of the base material may be connected to the wiring arranged in the film material at the portion arranged on the installation target surface, and may be electrically connected to the antenna. The lower member may be formed of an elastic material at an end portion of the upper surface side where the film member protrudes. The upper member may have a cover portion that covers one end of the middle member and that has an end located at the boundary between the first portion and the second portion of the film material. The lower member may be a heat-resistant member.

According to one embodiment of the invention, a film antenna is provided. A film antenna may comprise a substrate. A film antenna may comprise a film material enclosing the antenna. The film material may have a first portion enclosed and bonded to the substrate and a second portion protruding from the substrate. The substrate comprises a lower member having a base on which the first portion of the film material is arranged, and an inclined portion protruding from the base and having the second portion of the film material arranged thereon. may have The substrate may have a middle member disposed over the first portion of the film material. The substrate may have a top member disposed on the middle member.

The base member may include a connector disposed on the intermediate member and wiring electrically connecting the connector and the antenna. The inclined portion may be inclined from the height of the upper surface of the base to the height of the lower surface of the base. The base portion and the inclined portion may have lower surfaces installed on an installation target surface on which the film antenna is installed.

According to one embodiment of the invention, a film antenna is provided. A film antenna may comprise a substrate. A film antenna may comprise a film material encasing the antenna having a first portion bonded to a substrate and a second portion protruding from the substrate. The film material may have an inclined portion closer to the substrate than the boundary between the first portion and the second portion.

It should be noted that the above summary of the invention does not list all the necessary features of the invention. Subcombinations of these feature groups can also be inventions.

An example of a conventional film antenna 60 is shown schematically. An example of the XX section of a conventional film antenna 60 is shown schematically. An example of the film antenna 10 which concerns on this embodiment is shown roughly. An example of a YY section of the film antenna 10 is shown schematically. An example of a ZZ section of the film antenna 10 is shown schematically. Another example of the base material 100 is shown schematically. Another example of the base material 100 is shown schematically. Another example of the base material 100 is shown schematically. 4 schematically shows another example of the lower member 300 Another example of the lower member 300 is shown schematically. Another example of the lower member 300 is shown schematically. Another example of the film antenna 10 is schematically shown. Another example of the film antenna 10 is schematically shown.

In a film antenna that has a feeding part and a film material that encloses the antenna, if there is a gap between the surface to be installed and the film material, which is the result of the film floating, the adhesive strength will decrease due to air bubbles, and the durability will be reduced due to the inclusion of dust. It is conceivable that the quality may decline. In the film antenna according to the present embodiment, for example, a gap between the installation target surface and the film material is enclosed in the feeding section side and is isolated from the outside. As a result, it is possible to prevent dust and foreign matter from entering the gap, which contributes to suppressing a decrease in the adhesiveness of the film portion, a decrease in antenna performance, a decrease in durability of the film portion, and the like.

Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution of the invention.

FIG. 1 schematically shows an example of a conventional film antenna 60. As shown in FIG. FIG. 2 schematically shows an example of the XX section of the film antenna 60. As shown in FIG.

A film antenna 60 includes a base material 600 , a film material 700 and a connector 800 . Base material 600 may also be referred to as a feeder. The substrate 600 has a lower member 610 , a middle member 620 and an upper member 630 . The lower member 610 has a plate shape, and a part of the film material 700 is arranged on the upper surface thereof. A middle member 620 is arranged on part of the film material 700 , and an upper member 630 is arranged on the middle member 620 .

A film material 700 includes an antenna 710 and wiring 712 . A connector 800 and wiring 802 are arranged in the intermediate member 620 . The wiring 802 and the wiring 712 are connected, and the connector 800 and the antenna 710 are electrically connected.

The lower member 610 is adhered to the installation target surface on which the film antenna 60 is installed. The lower member 610 plays a role of preventing or reducing heat generated in at least one of the connector 800, the wiring 802, and the wiring 712 from being transferred to the installation target surface.

When the conventional film antenna 60 is installed on the installation target surface, the film material 700 may float, that is, a gap may be formed. If dust or foreign matter enters the gap, the durability of the film antenna 60 may be reduced. By bending the film material 700 at a steep angle after protruding from the base material 600, the gap can be reduced or eliminated, but the resistance of the wiring 712 at the bent portion increases or the wiring 712 is damaged at the bent portion. This is not desirable.

FIG. 3 schematically shows an example of the film antenna 10 according to this embodiment. The film antenna 10 may comprise a substrate 100 and a film material 200. As shown in FIG. The film antenna 10 may have the connector 400 .

The film antenna 10 may be connected to a wireless device (not shown) via the connector 400 and may provide the wireless device with an antenna function. Examples of antenna functions include, but are not limited to, a transmission/reception function for 5G (5th Generation Mobile Communication System) and a transmission/reception function for LTE (Long Term Evolution).

The film antenna 10 may be installed, for example, by being adhered to a surface such as a transparent window of a building. Not limited to this, the film antenna 10 may be installed at any place.

A part of the film material 200 is fixed to the base material 100 . The base material 100 and the film material 200 are fixed to the installation target surface on which the film antenna 10 is installed. The base material 100 and the film material 200 are adhered, for example, to the installation target surface.

The film material 200 may include the antenna 500 and wiring 502 electrically connecting the antenna 500 and the connector 400 . The film material 200 may be made of a transparent material that does not obstruct the scenery when installed on glass or the like. The wiring 502 may be so thin that it cannot be seen with the naked eye from the viewpoint of beauty when the film antenna 10 is installed.

FIG. 4 schematically shows an example of a YY section of the film antenna 10. As shown in FIG. The substrate 100 comprises a lower member 300 , a middle member 310 and an upper member 320 .

The lower member 300 is installed on the installation target surface on which the film antenna 10 is installed. For example, the lower surface 302 of the lower member 300 is adhered to the installation target surface. Any method may be used to adhere the lower surface 302 to the installation target surface. Examples of the adhesion method include adhesion using an adhesive agent, double-sided tape, or the like, and the lower surface 302 itself having adhesiveness. Note that the lower surface 302 may be installed on the installation target surface by a method other than adhesion. For example, if the installation target surface is a material that can be screwed, the lower member 300 is screwed to the installation target surface.

A portion of the film material 200 is disposed on the upper surface 304 of the lower member 300 . A portion of the film material 200 may be fixed to the top surface 304 . For example, a portion of film material 200 may be adhered to top surface 304 . Any method may be used to adhere the film material 200 to the upper surface 304 of the part. Examples of the adhesion method include adhesion using an adhesive agent, double-sided tape, or the like, adhesion of the upper surface 304 itself, and adhesion of the film material 200 itself. A part of the film material 200 may be fixed to the upper surface 304 by a method other than adhesion. For example, a portion of the film material 200 is screwed or the like to the upper surface 304 . A portion of the film material 200 may also be fixed to the upper surface 304 by pressure of the middle member 310 against the lower member 300 . The method for fixing the film material 200 to the upper surface 304 is not limited to the above example as long as the wiring included in the film material 200 is not broken.

A middle member 310 may be placed over a portion of the film material 200 . The intermediate member 310 may include the connector 400 and wiring that electrically connects the connector 400 and the antenna of the film material 200 .

The upper member 320 may be positioned over the middle member 310 . The upper member 320 may have a shape that covers the middle member 310 . The upper member 320 may have a shape that covers the side surface of the middle member 310 . Upper member 320 may be secured to lower member 300 . 3 and 4 show an example in which the upper member 320 is fixed to the lower member 300 by the fasteners 30, but the method of fixing the upper member 320 to the lower member 300 is not limited to this. For example, top member 320 may be glued to bottom member 300 . Note that the upper member 320 does not have to have a shape that covers the middle member 310 . Also, the upper member 320 may not be fixed to the lower member 300 .

FIG. 5 schematically shows an example of a ZZ section of the film antenna 10. As shown in FIG. The film material 200 has a joint portion 202 joined to the substrate 100 and a projecting portion 204 protruding from the substrate 100 . The joining portion 202 may be an example of a first portion of the film material 200 . Projecting portion 204 may be an example of a second portion of film material 200 .

Middle member 310 has connector 400 and wiring 402 that electrically connects connector 400 and antenna 500 . In FIG. 5, wiring 402 is connected to wiring 502 of antenna 500 on lower member 300 .

At least a portion of the joint portion 202 of the film material 200 is inclined. In the example shown in FIG. 5, the interface portion 202 is partially positioned above the lower member 300 and partially slanted. In the base material 100 shown in FIG. 5, the lower member 300 does not extend to the end of the base material 100 where the film material 200 protrudes, and has a shape that is interrupted in the middle. It is configured so that the portion is inclined. As shown in FIG. 5 , the film material 200 may have an inclined portion closer to the base material 100 than the boundary between the joint portion 202 and the projecting portion 204 .

In this way, by shortening the length of the lower member 300 in the direction in which the film material 200 protrudes compared to the conventional art, the position at which the film material 200 is inclined is not outside the base material 100, It can be in the substrate 100 . As a result, the gap can be hidden in the base material 100, and the heat insulating function of the lower member 300 can be maintained to some extent, and the entry of dust, foreign matter, and the like can be suppressed.

The upper member 320 shown in FIG. 5 has a cover portion 322 . The cover portion 322 may cover one end of the middle member 310 and have an end located at the interface between the joint portion 202 and the protruding portion 204 . Positioning the end of the cover portion 322 at the boundary between the joint portion 202 and the protruding portion 204 can reduce the possibility of creating a gap between the film material 200 and the installation target surface. Note that the upper member 320 may not have the cover portion 322 .

The material of the lower member 300 may be any material as long as it can suppress the heat generated in the intermediate member 310 from being transferred to the installation target surface. The lower member 300 may be a heat resistant member. By using a heat-resistant member for the lower member 300, the amount of heat transmitted from the middle member 310 to the installation target surface can be greatly reduced, or the heat can be prevented from being transmitted. Lower member 300 and upper member 320 may be of the same material.

The lower member 300 and upper member 320 and the middle member 310 may be made of different materials. For example, the material of the lower member 300 and the upper member 320 is resin such as polyvinyl chloride (PVC) and ABS resin, and the material of the intermediate member 310 is resin. The materials of the lower member 300, middle member 310, and upper member 320 may all be different. The materials of the lower member 300, the intermediate member 310 and the upper member 320 may all be the same.

The lower member 300 may be made of an elastic material at the end on the upper surface 304 side where the protruding portion 204 protrudes. As a result, the pressure exerted by the end portion of the lower member 300 on the film material 200 can be reduced, and the possibility of the wiring 502 inside the film material 200 being damaged can be reduced. Examples of elastic materials include, but are not limited to, rubber.

FIG. 6 schematically shows another example of the substrate 100. As shown in FIG. Here, differences from the base material 100 shown in FIG. 5 are mainly described. Lower member 300 illustrated in FIG. 6 includes base 306 and ramp 307 . The base portion 306 has a plate shape, and the inclined portion 307 extends from the base portion 306 . For example, base 306 has a cuboid shape. In the example shown in FIG. 6 , the sloping portions of the joint portions 202 of the film material 200 are all arranged above the lower member 300 . The lower member 300 shown in FIG. 6 has a larger volume and a slightly more complicated shape than the lower member 300 shown in FIG. The lower member 300 may be entirely made of the same material, or may be partially made of a different material. For example, ramp 307 may be of a different material than base 306 . Also, the inclined portion 307 may be made of the same material as the base portion 306 .

FIG. 7 schematically shows another example of the substrate 100. As shown in FIG. Here, differences from the base material 100 shown in FIG. 5 are mainly described. The lower member 300 illustrated in FIG. 7 is entirely inclined from the upper member 320 toward the installation target surface. A joint portion 202 of the film material 200 is entirely arranged on the lower member 300 . The film material 200 placed on the lower member 300 may be in contact with the installation target surface at the edge of the base material 100 . Compared with the lower member 300 shown in FIG. 5 , the lower member 300 shown in FIG. 7 can reduce the bending angle of the film material 200 and improve the quality of the signal propagating through the wiring 502 .

FIG. 8 schematically shows another example of the substrate 100. As shown in FIG. Here, differences from the base material 100 shown in FIG. 5 are mainly described. In this example, the lower member 300 has a curved end on the upper surface 304 side where the film material 200 protrudes. The curved portion may be smoothed, for example chamfered. FIG. 8 illustrates the case where the lower member 300 has the chamfered portion R. As shown in FIG. As a result, the pressure exerted by the end portion of the lower member 300 on the film material 200 can be reduced, and the possibility of the wiring 502 inside the film material 200 being damaged can be reduced. It should be noted that only the curved portion of the lower member 300 may be made of an elastic material such as rubber.

9 and 10 schematically show another example of the lower member 300. FIG. 9 schematically shows the shape of the lower member 300 viewed from above, and FIG. 10 schematically shows the shape of the lower member 300 viewed from the side. 9 and 10, illustration of the portion fixed to the upper member 320 is omitted.

The lower member 300 illustrated in FIGS. 9 and 10 includes a base portion 306, a stretched portion 308 stretched from one end side of the base portion 306 in the direction in which the film material 200 protrudes, and a film material from the other end side of the base portion 306. and an extension portion 309 extending in the direction in which the material 200 protrudes.

The stretched portion 308 and the stretched portion 309 are inclined in the stretching direction, and the inclined portion of the film material 200 may be arranged on the upper surface. The lower member 300 illustrated in FIG. 6 has an inclined portion 307 that extends across the entire width of the base portion 306, whereas the lower member 300 illustrated in FIGS. It has two extending portions 308 and 309 extending toward the side. By providing the extending portions 308 and 309 at both ends of the base portion 306, it is possible to reduce the volume of the lower member 300 while preventing dust and foreign matter from entering from the outside.

FIG. 11 schematically shows another example of the lower member 300. As shown in FIG. Here, differences from the lower member 300 illustrated in FIGS. 9 and 10 are mainly described. FIG. 11 schematically shows the shape of the lower member 300 viewed from above. The lower member 300 shown in FIG. 11 has a corrugated shape on the side from which the film material 200 protrudes. The shape of the side of the lower member 300 from which the film member 200 protrudes is not limited to this, and may be another shape.

FIG. 12 schematically shows another example of the film antenna 10. As shown in FIG. Here, differences from the film antenna 10 shown in FIG. 5 are mainly described. In the film antenna 10 shown in FIG. 12, the joint portion 202 of the film material 200 includes a portion 212 arranged on the upper surface of the lower member 300, a bent portion 214, and not arranged on the upper surface of the lower member 300. and a portion 216 that is positioned on the installation target surface. The wiring 402 is connected to the wiring 502 at the portion 216 of the joint portion 202 and is electrically connected to the antenna 500 .

In this way, by configuring the wiring 402 and the wiring 502 to be connected at the portion 216 of the joint portion 202 , the wiring 502 can be omitted from the portion 212 of the joint portion 202 . Thereby, the degree of freedom of deformation of the film material 200 can be increased. In the example shown in FIG. 12, the film material 200 is arranged along the shape of the lower member 300 . As a result, the resistance of the wiring 502 at the bent portion 214 does not increase, the wiring 502 does not break at the bent portion 214, and the gap between the film material 200 and the installation target surface can be prevented.

FIG. 13 schematically shows another example of the film antenna 10. As shown in FIG. Here, differences from the film antenna 10 shown in FIG. 5 are mainly described.

The film material 200 has an encapsulating portion 206 enclosed in the substrate 100 and a projecting portion 208 protruding from the substrate 100 . In the example shown in FIG. 13, the encasement portion 206 of the film material 200 is not slanted. The inner wrapper portion 206 may be an example of the first portion of the film material 200 . Projecting portion 208 may be an example of a second portion of film material 200 .

The lower member 300 has a base portion 332 on which the encapsulating portion 206 of the film material 200 is arranged on the upper surface 304, and an inclined portion 334 protruding from the base portion 332, on which the protruding portion 208 of the film material 200 is arranged. 334. The sloped portion 334 may slope from the height of the top surface of the base portion 332 to the height of the bottom surface of the base portion 332 . The base portion 332 and the inclined portion 334 have lower surfaces that are installed on the installation target surface on which the film antenna 10 is installed.

The middle member 310 is positioned over the inner envelope portion 206 of the film material 200 . Middle member 310 has connector 400 and wiring 402 .

The upper member 320 is positioned over the middle member 310 . Top member 320 covers one end of middle member 310 and has a cover portion 322 whose end may be located at the interface between inner envelope portion 206 and projecting portion 208 . Note that the upper member 320 may not have the cover portion 322 .

The film antenna 10 illustrated in FIG. 13 prevents the formation of a gap between the film material 200 and the installation target surface by the lower member 300 having the inclined portion 334 .

Although the present invention has been described above using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is clear from the description of the scope of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention.

The execution order of each process such as actions, procedures, steps, and stages in the devices, systems, programs, and methods shown in the claims, the specification, and the drawings is etc., and it should be noted that they can be implemented in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the specification, and the drawings, even if the description is made using "first," "next," etc. for convenience, it means that it is essential to carry out in this order. not a thing

10 film antenna, 30 fastener, 60 film antenna, 100 base material, 200 film material, 202 joining portion, 204 protruding portion, 206 enclosing portion, 208 protruding portion, 300 lower member, 302 lower surface, 304 upper surface, 306 base, 307 Inclined portion 308 Extension portion 309 Extension portion 310 Middle member 320 Upper member 322 Cover portion 332 Base portion 334 Inclined portion 400 Connector 402 Wiring 500 Antenna 502 Wiring 600 Base material 610 Lower member 620 intermediate member, 630 upper member, 700 film material, 710 antenna, 712 wiring, 800 connector, 802 wiring

Claims (7)

A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
At least part of the first part of the film material is arranged on the upper surface, and a member having a lower surface installed on an installation target surface for installing the film antenna,
The second portion of the film material protrudes from the lower end of the base material,
A film antenna, wherein at least part of the inclined portion of the first portion of the film material is arranged on the member. A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
a middle member disposed on the first portion of the film material;
an upper member disposed on the middle member;
The second portion of the film material protrudes from the lower end of the base material,
The base material is a film antenna, wherein the upper member is the longest in the projecting direction in which the second portion of the film material projects, and the lower member is the shortest in the projecting direction. A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
an upper member having a length in a direction in which the second portion of the film material protrudes is longer than the lower member;
A film antenna, wherein the second portion of the film material protrudes from a lower end of the base material. A film antenna,
a base material;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
a middle member disposed on the first portion of the film material;
The second portion of the film material protrudes from the lower end of the base material,
The base member is a film antenna, wherein the lower member is shorter than the middle member in a projecting direction of the second portion of the film material. A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
and an upper member that constitutes the exterior of the base material,
The second portion of the film material protrudes from the lower end of the base material,
The base material is a film antenna, wherein the lower member is shorter than the upper member in a direction in which the second portion of the film member protrudes. A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
and an upper member that constitutes the exterior of the base material,
The second portion of the film material protrudes from the lower end of the base material,
A film antenna, wherein an upper surface of a lower end of the inclined portion of the first portion of the film material is covered with the upper member. A film antenna,
a substrate;
a film material containing an antenna, having a first portion bonded to the base material and a second portion protruding from the base material,
The base material is
a lower member having an upper surface on which at least part of the first portion of the film material is arranged and having a lower surface to be installed on an installation target surface on which the film antenna is installed;
and an upper member that constitutes the exterior of the base material,
The second portion of the film material protrudes from the lower end of the base material,
A film antenna, wherein when the film antenna is installed on the installation target surface, a gap surrounded by the installation target surface, the film member, and the lower member is generated inside the upper member.

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