Window glass for vehicle with antenna and vehicle

Abstract

To provide a window glass for a vehicle with an antenna, having a good antenna characteristic, and provide a vehicle.SOLUTION: A window glass for a vehicle with an antenna contains: an antenna device having an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground line connected to the ground conductor; and a glass plate that has a first penetration hole that is attached to a window frame of the vehicle, and penetrates between a main surface on an outside of a vehicle chamber and a main surface of an internal side of the vehicle chamber, and a conductive film formed onto the main surface of the internal side of the vehicle chamber, and in which the antenna device is attached to a part overlapping with the first penetration hole from the main surface on the outside of the vehicle chamber. The signal line connected to the antenna element of the antenna device and the ground line connected to the ground conductor of the antenna device communicate with the vehicle chamber via the first penetration hole. The conductive film is coupled with the ground conductor in capacitance.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an antenna-equipped vehicle window glass and a vehicle. [Background technology]

[0002] As an antenna to be attached to a vehicle, for example, an antenna device in which various antenna elements are stored in a protruding cover on the roof of the vehicle, that is, a so-called shark fin antenna, is known. In addition, some vehicle models have an opening on the roof of the vehicle, and roof glass is arranged in the opening. When the roof glass is arranged in the opening, a through hole is formed in the roof glass, and a power line, a signal line, and the like to the shark fin antenna are connected to a power source and a signal source inside the vehicle through the through hole. As a vehicle window glass to which a shark fin antenna is attached, there is a vehicle window glass having an antenna mounting body, the vehicle window glass having an opening in a composite glass plate made of an outer glass plate, an intermediate layer, and an inner glass plate, the inner glass plate having an opening having a recess adjacent to the opening, an adhesive arranged on the upper part of the outer glass plate in the area around the opening, and a mounting plate arranged and fixed on the adhesive. A vehicle window glass is known which comprises an antenna housing on a mounting plate with a rod-shaped antenna mounting body within the opening and within and / or below the recess, and a nut or clip on the antenna mounting body below or in the recess (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Special Publication No. 2013-533169 Summary of the Invention [Problem to be solved by the invention]

[0004] Meanwhile, vehicle window glass, which is attached to an opening in the roof of a vehicle, is known, and has a conductive film such as a heat reflective film or a Low-E (Low Emissivity) coating on its glass surface. Conventional vehicle window glass does not have a configuration that uses the conductive film of the roof glass as a ground layer for the antenna in the antenna housing. As a result, the area of ​​the ground layer in the antenna housing is narrowed, and sufficient antenna characteristics cannot be obtained.

[0005] It is therefore an object of the present invention to provide an antenna-equipped vehicle window glass having good antenna characteristics, and a vehicle. [Means for solving the problem]

[0006] A vehicle window glass with an antenna according to an embodiment of the present disclosure includes an antenna device having an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground wire connected to the ground conductor, and a glass sheet attached to a window frame of a vehicle body, the glass sheet having a first through hole penetrating between a main surface facing the outside of the vehicle compartment and a main surface facing the inside of the vehicle compartment, and a conductive film formed on the main surface facing the inside of the vehicle compartment, wherein the antenna device is attached to a portion of the main surface facing the outside of the vehicle compartment that overlaps with the first through hole, and a signal line connected to the antenna element of the antenna device and a ground wire connected to the ground conductor of the antenna device are passed into the vehicle compartment via the first through hole, and the conductive film is capacitively coupled to the ground conductor. Effect of the Invention

[0007] It is possible to provide an antenna-equipped vehicle window glass having good antenna characteristics, and a vehicle. [Brief description of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of a cross-sectional configuration of an antenna-equipped vehicle window glass according to an embodiment; [Diagram 2]5 is a diagram showing an example of a simulation result of the resonant frequency and the maximum gain of the antenna device 50 relative to the radius of the ground conductor of the antenna device mounted on a vehicle window glass according to the embodiment. FIG. [Diagram 3] 5 is a diagram showing an example of a simulation result of the maximum gain of the antenna device versus the sheet resistance of the Low-E film of the vehicle window glass according to the embodiment. FIG. [Figure 4] 5 is a diagram showing an example of a simulation result of the maximum gain of the antenna device versus the thickness of the laminated glass of the vehicle window glass according to the embodiment; FIG. [Diagram 5] FIG. 11 is a diagram showing an example of a cross-sectional configuration of an antenna-equipped vehicle window glass according to a modified example of the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the antenna-equipped vehicle window glass and a vehicle to which the present disclosure is applied will be described. In the following, the same elements are denoted by the same reference numerals, and duplicated descriptions may be omitted.

[0010] In the following, the XYZ coordinate system is defined and described. The direction parallel to the X axis (X direction), the direction parallel to the Y axis (Y direction), and the direction parallel to the Z axis (Z direction) are mutually perpendicular. In the following, for convenience of explanation, the -Z direction side may be referred to as the lower side or bottom, and the +Z direction side as the upper side or top, but this does not indicate a universal relationship between the top and bottom. In addition, a plan view refers to a view in the XY plane. In the following, the length, width, thickness, etc. of each part may be exaggerated to make the configuration easier to understand. In addition, the terms parallel, right angle, orthogonal, horizontal, vertical, up and down, etc., are allowed to be misaligned to an extent that does not impair the effect of the embodiment.

[0011] Examples of the window glass for a vehicle with an antenna in this embodiment include roof glass attached to the ceiling of the vehicle, a windshield (front glass) attached to the front of the vehicle, fixed side glass (including front bench glass and rear quarter glass) attached to the side of the vehicle, and rear glass attached to the rear of the vehicle. The window glass for a vehicle with an antenna is not limited to these examples. Below, as an example, a form in which the window glass for a vehicle with an antenna is used as roof glass will be described.

[0012] The vehicle is, for example, an automobile such as an EV (Electric Vehicle), a PHEV (Plug-in Hybrid Electric Vehicle), a HV (Hybrid Vehicle), a gasoline vehicle, or a diesel vehicle. The vehicle may also be a train or a steam locomotive. The vehicle is an example of a moving body that moves while carrying passengers.

[0013] In the following description, the outside of the vehicle compartment refers to the outside of the vehicle (outside the cabin), and the inside of the vehicle compartment refers to the inside of the vehicle (inside the cabin).

[0014] <Embodiment> Fig. 1 is a diagram showing an example of a cross-sectional configuration of an antenna-equipped vehicle window glass 100 according to an embodiment. Fig. 1 shows an example of the cross-sectional configuration in a state in which the antenna-equipped vehicle window glass 100 is attached to a vehicle body 10. Fig. 1 shows the vehicle body 10 of a vehicle 1.

[0015] The vehicle 1 includes a vehicle body 10, an antenna device 50, and an antenna-equipped vehicle window glass 100. The vehicle body 10 has a flange 11 and an adhesive 20.

[0016] The antenna-equipped vehicle window glass 100 includes, as an example, an antenna device 50, a laminated glass 110, and an FPC (Flexible Printed Circuit) 120. The antenna device 50 is attached to a main surface 111A on the vehicle exterior side of a glass plate 111 of the laminated glass 110 of the antenna-equipped vehicle window glass 100. The antenna device 50 is, as an example, a shark fin type antenna device. Note that the antenna-equipped vehicle window glass 100 may include, as an example, a single-layer glass instead of the laminated glass 110, but here, as an example, a form including the laminated glass 110 will be described.

[0017] <Laminated Glass 110> The laminated glass 110 has glass plates 111 and 112, an intermediate film 113, a ceramic layer 114, and a Low-E (Low Emissivity) film 115. The glass plate 111 is an example of a first glass plate, and the glass plate 112 is an example of a second glass plate. The ceramic layer 114 is an example of a shielding layer. The Low-E film 115 is an example of a conductive film.

[0018] The laminated glass 110 is formed by bonding a glass plate 111, which is provided on the exterior side of the vehicle body 10 and has a ceramic layer 114 formed thereon, to a glass plate 112, which is provided on the interior side of the vehicle body 10 and has a Low-E film 115 formed thereon, via an intermediate film 113 disposed between the glass plates 111 and 112.

[0019] The laminated glass 110 also has a through-hole 110A. The through-hole 110A penetrates the glass plates 111 and 112, the intermediate film 113, the ceramic layer 114, and the Low-E film 115 in the thickness direction (Z direction). The through-hole 110A is provided at a position overlapping with the antenna device 50 in a plan view.

[0020] <Glass plates 111 and 112> The glass plates 111 and 112 are transparent, flat glass plates. The glass plate 111 has an outdoor side main surface 111A and an indoor side main surface 111B. The main surface 111A is an example of a first main surface, and the indoor side main surface 111B is an example of a second main surface. The glass plate 112 has an outdoor side main surface 112A and an indoor side main surface 112B. The main surface 112A is an example of a third main surface, and the indoor side main surface 112B is an example of a fourth main surface. The main surfaces 111B and 112B are examples of indoor side main surfaces.

[0021] The glass plates 111 and 112 may be inorganic glass or organic glass. As the inorganic glass, for example, soda lime glass, aluminosilicate glass, borosilicate glass, alkali-free glass, quartz glass, etc. can be used without any particular limitation. Among these, soda lime glass is particularly preferable from the viewpoint of manufacturing cost and formability. The forming method of the glass plates 111 and 112 is not particularly limited. For example, in the case of inorganic glass, glass plates formed by a float method or the like are preferable.

[0022] When the glass plates 111 and 112 are inorganic glass, the glass plates 111 and 112 may be either untempered glass or tempered glass. Untempered glass is obtained by forming molten glass into a plate shape and slowly cooling it. Tempered glass is obtained by forming a compressive stress layer on the surface of untempered glass, and may be either air-cooled tempered glass or chemically tempered glass.

[0023] When the tempered glass is physically tempered glass (for example, air-cooled tempered glass), the glass surface may be tempered by generating a compressive stress layer on the glass surface by a temperature difference between the glass surface and the inside of the glass by an operation other than slow cooling, such as quenching a glass sheet uniformly heated in bending from a temperature near the softening point. When the tempered glass is chemically tempered glass, the glass surface may be tempered by generating a compressive stress on the glass surface by an ion exchange method or the like after bending. In addition, glass that absorbs ultraviolet rays or infrared rays may be used as the glass sheets 111 and 112. The glass sheets 111 and 112 are preferably transparent, but may be colored to the extent that transparency is not impaired. In addition, the glass sheets 111 and 112 may not be transparent.

[0024] The laminated glass 110 may have a curved shape such that the exterior side is convex when attached to the vehicle body 10. The laminated glass 110 may have a single curved shape bent in only one direction, or may have a compound curved shape bent in two directions (for example, the up-down direction and the left-right direction perpendicular to the up-down direction when the laminated glass 110 is attached to the vehicle body 10). Gravity forming, press forming, roller forming, or the like is used for bending the laminated glass 110. When the laminated glass 110 is bent to a predetermined curvature, the radius of curvature of the laminated glass 110 may be 1000 mm or more and 100000 mm or less.

[0025] In addition, when the laminated glass 110 is attached to the vehicle body 10, the thickness of the glass plate 111 located on the exterior side and the thickness of the glass plate 112 located on the interior side may be the same or different. The thickness of the glass plate 111 is preferably 1.0 mm or more and 3.0 mm or less. When the thickness of the glass plate 111 is 1.0 mm or more, the strength such as the flying stone resistance performance is sufficient, and when it is 3.0 mm or less, the mass of the laminated glass 110 does not become too large, which is preferable in terms of fuel efficiency of the vehicle. The thickness of the glass plate 112 is preferably 0.3 mm or more and 2.3 mm or less. When the thickness of the glass plate 112 is 0.3 mm or more, the handleability is good, and when it is 2.3 mm or less, the mass does not become too large. It is preferable that the thicknesses of the glass plates 111 and 112 are each 1.8 mm or less, since the laminated glass 110 can be both lightweight and soundproof. When the thickness of the glass plate 112 is 1.0 mm or less, the glass plate 112 may be chemically strengthened glass. When the glass plate 112 is a chemically strengthened glass, it is preferable that the compressive stress value of the glass surface is 300 MPa or more, and the depth of the compressive stress layer is 2 μm or more.

[0026] When the glass plates 111 and 112 are made of organic glass, examples of the material for the organic glass include transparent resins such as polycarbonate and acrylic resins (eg, polymethyl methacrylate).

[0027] When single-layer glass is used instead of the laminated glass 110, the single-layer glass is preferably tempered glass, for example. As the tempered glass, physically tempered glass (for example, air-cooled tempered glass) can be used. When it is single-layer glass, the thickness of the glass plate is preferably 2.0 mm or more and 5.0 mm or less. When the thickness of the glass plate is 2.0 mm or more, the strength such as resistance to flying stones is sufficient, and when the thickness is 5.0 mm or less, the mass of the glass plate is not too large, which is preferable in terms of fuel efficiency of the vehicle.

[0028] <Interlayer 113> The intermediate film 113 is a transparent or semi-transparent dielectric material having dielectric properties and interposed between the glass plates 111 and 112. The glass plates 111 and 112 are joined by the intermediate film 113. Examples of materials for the intermediate film 113 include thermoplastic polyvinyl butyral (PVB) and ethylene vinyl acetate copolymer (EVA). The intermediate film 113 may be transparent or colored. The intermediate film 113 may be composed of two or more layers of film. The intermediate film 113 is disposed between the ceramic layer 114 and the glass plate 112 in a portion where the ceramic layer 114 exists in a plan view.

[0029] <Ceramic layer 114> The ceramic layer 114 is, for example, a fired product of a dark-colored ceramic paste, and is formed by applying and firing a ceramic color paste containing a fusible glass frit containing a black pigment. The ceramic layer 114 is formed in order to prevent the adhesive from deteriorating due to ultraviolet rays when the window glass 100 for a vehicle with an antenna is bonded to the vehicle body 10, and also to improve the appearance by preventing the connection between the window glass 100 for a vehicle with an antenna and the vehicle body 10 from being seen from the outside of the vehicle body 10.

[0030] As an example, the ceramic layer 114 is provided on the indoor main surface 111B of the glass plate 111. The ceramic layer 114 may be provided in a layer on each of the indoor main surfaces 111B and 112B of the glass plates 111 and 112, or may be provided only on the indoor main surface 112B of the glass plate 112. The ceramic layer 114 may be provided on the main surface 112A of the glass plate 112 instead of the main surface 111B or 112B. The ceramic layer 114 may be provided only on the main surface 112A of the glass plate 112. When a single-layer glass is used instead of the laminated glass 110, the ceramic layer 114 is provided on the indoor main surface of the single-layer glass.

[0031] The ceramic layer 114 is provided at the peripheral portion of the laminated glass 110 in plan view and the portion overlapping the antenna device 50 in plan view on the main surface 111B. The peripheral portion of the laminated glass 110 is a circumferential portion along the outer edge of the laminated glass 110 in plan view, which is slightly inside the outer edge of the laminated glass 110. The peripheral portion of the laminated glass 110 is the peripheral portions of the glass plates 111 and 112, and the outer edge of the laminated glass 110 is the outer edges of the glass plates 111 and 112. The portion overlapping the antenna device 50 in plan view is the portion located directly below the antenna device 50 when the window glass 100 with an antenna is used as a roof glass.

[0032] Also, when the ceramic layer 114 (shielding layer) is formed in a region overlapping the region where the antenna device 50 is disposed in plan view on the main surface 112B, a part of the Low-E film 115 may be formed in a region where the ceramic layer 114 (shielding layer) is not formed on the main surface 112B. Also in this case, the Low-E film 115 only needs to have a portion overlapping the ground conductor 53 of the antenna device 50.

[0033] <Low-E film 115> The Low-E film 115 is a film that reflects far-infrared rays and is provided to improve the heat insulation performance or heat shielding performance of the laminated glass 110. The Low-E film 115 is produced, for example, by forming (coating) a transparent conductive film such as tin oxide, silver, or ITO on the main surface 112B of the glass plate 112. Note that the Low-E film 115 may be a conductive film other than a transparent conductive film such as tin oxide, silver, or ITO, for example.

[0034] Here, a form in which the Low-E film 115 is formed on the main surface 112B (fourth main surface) of the glass plate 112 will be described. However, the Low-E film 115 may be formed on a main surface other than the main surface 112B (fourth main surface), for example, on the main surface 111B (second main surface) of the glass plate 111 or the main surface 112A (third main surface) of the glass plate 112. When a single-layer glass is used instead of the laminated glass 110, the Low-E film 115 is provided on the main surface of the single-layer glass facing the interior.

[0035] Furthermore, the main surface 112A (third main surface) of the glass plate 112 extends along the main surface 111B (second main surface) of the glass plate 111 and the main surface 112B (fourth main surface) of the glass plate 112. For this reason, the formation of the Low-E film 115 on the main surface 112A (third main surface) of the glass plate 112 corresponds to the Low-E film 115 being formed along the main surface 111B (second main surface) of the glass plate 111 or the main surface 112B (fourth main surface) of the glass plate 112.

[0036] The Low-E film 115 is formed in a portion that overlaps with the ground conductor 53 of the antenna device 50 in a plan view. This is for the purpose of capacitively coupling the Low-E film 115 with the ground conductor 53. The fact that the Low-E film 115 is capacitively coupled with the ground conductor 53 will be described later together with the explanation of the ground conductor 53.

[0037] The Low-E film 115 is electrically connected to the flange 11 of the vehicle body 10 via the FPC 120, for example, in order to keep the Low-E film 115 at ground potential. The Low-E film 115 and the flange 11 may be capacitively coupled. The Low-E film 115 (conductive film) may be electrically connected to the shield wire 72 of the coaxial cable 70. The meaning of the electrical connection will be described later together with an explanation of the FPC 120. In addition, if the Low-E film 115 and the flange 11 are capacitively coupled or if the area of ​​the conductive film is sufficiently secured, the FPC 120 may not be provided.

[0038] <fpc120> The FPC 120 is connected to the Low-E film 115 at an end portion on the +X-axis direction side of the laminated glass 110. More specifically, one end of the conductive wire of the FPC 120 is electrically connected to the lower surface of the Low-E film 115 at an end portion on the +X-axis direction side of the laminated glass 110. The other end of the conductive wire of the FPC 120 is electrically connected to the surface of the flange 11 of the vehicle body 10 on the interior side of the vehicle compartment. In other words, the conductive wire of the FPC 120 has one end electrically connected to the Low-E film 115 at an end portion on the +X-axis direction side of the laminated glass 110, and the other end electrically connected to the vehicle body 10. The conductive wire of the FPC 120 is an example of a connecting conductor. Although Figure 1 shows a form in which the FPC 120 connects between one location on the Low-E film 115 and one location on the vehicle body 10, the FPC 120 may be connected to two or more locations on the Low-E film 115, or may be connected to two or more locations on the vehicle body 10.

[0039] Here, being electrically connected includes both a direct current connection and a high frequency connection. In the case of a direct current connection, the conductors are connected by being in physical contact with each other, and direct current and alternating current can flow. In the case of a high frequency connection, the conductors are capacitively coupled with a space between them, so that a direct current does not flow but an alternating current (high frequency current) can flow. As an example, one end and the other end of the conductive wire of the FPC 120 may be capacitively coupled to the Low-E film 115 and the vehicle body 10.

[0040] <Antenna device 50 and spacer 60> The antenna device 50 includes an antenna body 51, an antenna element 52, a ground conductor 53, a fixed shaft 54, a nut 55, and a coaxial cable 70. The antenna device 50 is fixed to a laminated glass 110 via a spacer 60, and the coaxial cable 70 is connected to the antenna element 52 and the ground conductor 53. The coaxial cable 70 includes a core wire 71 and a shield wire 72. The core wire 71 is an example of a signal wire, and the shield wire 72 is an example of a ground wire. Note that a twisted wire, a balanced feeder, or the like may be used instead of the coaxial cable 70.

[0041] The spacer 60 is made of resin, for example, and has a shaft portion 61 and flat plate portions 62 and 63. The spacer 60 is configured, for example, so that the shaft portion 61 can be separated midway in the Z direction into a portion on the flat plate portion 62 side and a portion on the flat plate portion 63 side. This is to allow the shaft portion 61 to pass through the through hole 110A.

[0042] The shaft portion 61 is a hollow cylindrical portion provided in the through hole 110A of the laminated glass 110, and has a through hole 61A that penetrates in the Z direction. The through hole 61A penetrates from the upper surface of the flat plate portion 62 to the lower surface of the flat plate portion 63. The fixed shaft 54 ​​is passed through the through hole 61A.

[0043] The flat plate portion 62 is connected to the upper side of the shaft portion 61 and is provided along the XY plane between the antenna body 51 and the main surface 111A of the glass plate 111. The flat plate portion 63 is connected to the lower side of the shaft portion 61 and is provided along the XY plane between the main surface 112B of the glass plate 112 and the nut 55.

[0044] The antenna body 51 is a housing that houses the antenna element 52 etc. The antenna body 51 is made of resin, for example. A ground conductor 53 is provided on the bottom of the antenna body 51.

[0045] The antenna element 52 and the ground conductor 53 are provided inside the antenna body 51, and are provided with connection parts 52A and 53A, respectively. The connection part 52A of the antenna element 52 is connected to the core 71 of the coaxial cable 70, and the connection part 53A of the ground conductor 53 is connected to the shield wire 72 of the coaxial cable 70. The connection part 52A is a connection part between the antenna element 52 and the core 71 of the coaxial cable 70, and may be directly connected by soldering, crimping, a connector, or the like, or may be connected via a line. The connection part 53A is a connection part between the ground conductor 53 and the shield wire 72 of the coaxial cable 70, and may be directly connected by soldering, crimping, a connector, or the like, or may be connected via a line. 1, in order to easily understand the connection relationship between the antenna element 52 and the ground conductor 53 at the connection parts 52A and 53A and the core wire 71 and the shield wire 72 of the coaxial cable 70, the connection parts 52A and 53A are shown as lines. Note that, as an example, the antenna element 52 may be connected to the core wire 71 of the coaxial cable 70 via an amplifier at the connection part 52A.

[0046] The antenna element 52 is provided above the ground conductor 53. The ground conductor 53 is provided on the upper surface of the flat plate portion 62 of the spacer 60. The coaxial cable 70 is passed through a through hole 54B that penetrates the inside of the hollow cylindrical fixed shaft 54, and is passed from the lower end of the fixed shaft 54 ​​into the vehicle interior.

[0047] The ground conductor 53 is a metal conductor located at the bottom of the antenna body 51, and is disposed on the flat plate portion 62 of the spacer 60. For example, the ground conductor 53 may be a ground layer of a wiring board or the like of the antenna device 50. The ground conductor 53 may also be a ground layer of a wiring board on which an amplifier or the like that is inserted in series in the wiring or the like between the antenna element 52 and the core wire 71 of the coaxial cable 70 is mounted.

[0048] The ground conductor 53 is capacitively coupled to the Low-E film 115. The ground conductor 53 is capacitively coupled to the Low-E film 115 means that the ground conductor 53 and the Low-E film 115 are connected at high frequencies. If the ground conductor 53 is capacitively coupled to the Low-E film 115, the Low-E film 115 functions as a ground plane in addition to the ground conductor 53 when the antenna element 52 transmits or receives radio waves, and a current equal to or greater than a predetermined value corresponding to the current flowing through the antenna element 52 flows through the Low-E film 115.

[0049] The reason why the ground conductor 53 is capacitively coupled to the low-E film 115 is to improve the antenna characteristics of the antenna device 50 by making the ground plane of the antenna device 50 large. In addition, since the ground conductor 53 can be made small, the antenna device 50 can be made more compact. In other words, it is possible to achieve both a small size of the antenna device 50 and good antenna characteristics.

[0050] The fixed shaft 54 ​​is a hollow cylindrical bolt-shaped member with a helical thread formed on the outer surface, and is passed through the through hole 61A of the shaft portion 61 of the spacer 60. The fixed shaft 54 ​​is hollow cylindrical and has a through hole 54B through which the coaxial cable 70 passes. In addition to the coaxial cable 70, a power line for supplying power to an amplifier or the like provided in the antenna main body 51 may be passed through the through hole 54B, but this is omitted in FIG. 1. When DC power for power supply is superimposed on the core wire 71 of the coaxial cable 70, the power line is not necessary.

[0051] The fixed shaft 54 ​​has a base 54A located at the upper end and a through hole 54B penetrating the inside from the upper end to the lower end. The base 54A is connected to the ground conductor 53 through a through hole 61A of the shaft portion 61 of the spacer 60. The base 54A may be a hollow cylinder in a plan view, or may be a hollow square prism. When the base 54A is a hollow square prism, it has a rectangular ring shape in a plan view, so that the rotation of the antenna body 51 can be prevented. In this case, the inner surface of the part of the through hole 61A of the shaft portion 61 of the spacer 60 that corresponds to the base 54A may be rectangular in a plan view.

[0052] When fastening the antenna body 51 to the laminated glass 110, the fixed shaft 54 ​​is inserted from above into the through hole 61A of the spacer 60, and a nut 55 is attached to the lower end of the fixed shaft 54. Note that a fixing member such as a pin may be used instead of the nut 55. For example, a through hole penetrating in the radial direction may be provided at the lower end of the fixed shaft 54, and a pin may be inserted into the through hole to fix the lower end of the fixed shaft 54 ​​and the flat plate portion 63 of the spacer 60, thereby fastening the antenna body 51 to the laminated glass 110. The position of the through hole provided at the lower end of the fixed shaft 54 ​​in the Z direction may be aligned with the position of the lower surface of the flat plate portion 63.

[0053] The antenna element built into the antenna body 51 is an antenna element that transmits or receives radio waves in a predetermined frequency band. The antenna element may be an antenna element capable of receiving radio waves in a frequency band from a VHF (Very High Frequency) band to a UHF (Ultra High Frequency) band. Specifically, the antenna element may be an antenna element capable of receiving radio waves with a frequency of 30 MHz to 3 GHz. The antenna element may also be an antenna element capable of receiving at least one of radio waves in Band III (174 MHz to 240 MHz) of DAB (Digital Audio Broadband) and radio waves in terrestrial digital television broadcast waves (470 MHz to 710 MHz) included in the VHF band to UHF band. The antenna element may be an antenna element capable of receiving radio waves in a narrow band including the frequency band (76 MHz to 108 MHz) of FM broadcast waves and 760 MHz of ITS (Intelligent Transport Systems). A coil may also be inserted to miniaturize the antenna element for the FM / DAB band with a long wavelength.

[0054] Furthermore, the antenna element may be an antenna element capable of transmitting and receiving radio waves in the LTE (Long Term Evolution) frequency band, an antenna element capable of receiving radio waves in a satellite communication frequency band such as GNSS (Global Navigation Satellite System) and SDARS (Satellite Digital Audio Radio Service), or an antenna element capable of transmitting and receiving radio waves in the 5G (5th Generation Mobile Communication System) frequency band. An example of an antenna element for 5G is an antenna element capable of transmitting and receiving radio waves in a frequency band (e.g., 5.8 GHz band) for narrow-area communication called DSRC (Dedicated Short Range Communication) used in V2X (Vehicle to Everything) such as vehicle-to-vehicle communication and road-to-vehicle communication. In addition, the antenna element is not limited to one of the antenna elements exemplified above, and may include multiple antenna elements and be integrated and arranged in one place, or multiple antenna elements may be individually distributed and arranged in the vicinity of the laminated glass 110.

[0055] <Assembly of the antenna device 50 to the antenna-equipped vehicle window glass 100> The antenna body 51 can be fastened to the laminated glass 110 by fitting the spacer 60 into the through hole 110A of the laminated glass 110, inserting the fixed shaft 54 ​​from above into the through hole 61A of the shaft portion 61, and assembling a nut 55 to the lower end of the fixed shaft 54.

[0056] <Simulation results> 2 is a diagram showing an example of a simulation result of the resonant frequency and maximum gain of the antenna device 50 versus the radius of the ground conductor 53. The simulation was performed by changing the radius of the ground conductor 53 from 10 mm to 100 mm with the ground conductor 53 being circular in a plan view. Note that the maximum gain is the maximum value among the frequency characteristics of the average gain obtained by the directivity of the antenna device 50.

[0057] The antenna element 52 was set as a linear conductor of 900 mm extending in the +Z direction from the upper surface of the ground conductor 53. The ground conductor 53 was disposed on the main surface 111A to be a perfect conductor. The laminated glass 110 was a disc-shaped laminated glass in a plan view, and the radius was set to 1000 mm and the thickness was set to 5 mm. More specifically, the thickness of the laminated glass 110 was 2.1 mm for each of the glass plates 111 and 112, and 0.8 mm for the intermediate film 113. The Low-E film 115 located on the main surface 112B was also a circular conductor in a plan view, and the radius was set to 1000 mm. The sheet resistance of the Low-E film 115 was set to 0.8 Ω / sq. The centers of the circles of the ground conductor 53, the laminated glass 110, and the Low-E film 115 were aligned.

[0058] In Figure 2, the characteristics of the resonant frequency of the antenna device 50 versus the radius of the ground conductor 53 are shown by black circle (●) markers and a solid line, and the characteristics of the maximum gain (Max) of the antenna device 50 versus the radius of the ground conductor 53 are shown by white circle (○) markers and a dashed line.

[0059] 2, when the radius of the ground conductor 53 is 40 mm or more, the resonance frequency becomes approximately constant at about 85 MHz. Moreover, as shown by the dashed line, the maximum gain hardly changes depending on the radius of the ground conductor 53. From this result, it was found that the radius of the ground conductor 53 is preferably 40 mm or more.

[0060] 3 is a diagram showing an example of a simulation result of the maximum gain of the antenna device 50 versus the sheet resistance of the Low-E film 115. A simulation was performed to calculate the maximum gain of the antenna device 50 when the sheet resistance of the Low-E film 115 was changed.

[0061] The antenna element 52 was set as a linear conductor of 900 mm extending in the +Z direction from the upper surface of the ground conductor 53. The ground conductor 53 was arranged on the main surface 111A to be a perfect conductor. The laminated glass 110 was a disc-shaped laminated glass in a plan view, with a radius of 1000 mm and a thickness of 5 mm. More specifically, the thickness of the laminated glass 110 was 2.1 mm for each of the glass plates 111 and 112, and 0.8 mm for the interlayer film 113.

[0062] The length of the coaxial cable supplying power to the antenna element 52 was set to 100 mm. The ground conductor 53 was circular in plan view with a radius of 90 mm. The Low-E film 115 located on the main surface 112B was a circular conductor in plan view with a radius of 1000 mm. The centers of the circles of the ground conductor 53, the laminated glass 110, and the Low-E film 115 were aligned.

[0063] Under these conditions, a simulation was performed by varying the sheet resistance of the Low-E film 115 from 0.1 Ω / sq. to 1000 Ω / sq. and supplying an 84 MHz signal to the antenna element 52.

[0064] The simulation results showed that as the sheet resistance increases, the maximum gain drops significantly from around 100 Ω / sq., and the average sensitivity tends to decrease. When the sheet resistance of the low-E film 115 is 100 Ω / sq. or less, the drop in maximum gain is within about 3 dB compared to the maximum value when the sheet resistance is 0.1 Ω / sq. From these results, it was found that the sheet resistance of the low-E film 115 is preferably 100 Ω / sq. or less.

[0065] 4 is a diagram showing an example of a simulation result of the maximum gain of the antenna device 50 versus the thickness of the laminated glass 110. A simulation was performed to calculate the maximum gain of the antenna device 50 when the thickness of the laminated glass 110 was changed.

[0066] Antenna element 52 was set as a linear conductor of 900 mm extending in the +Z direction from the upper surface of ground conductor 53. Ground conductor 53 was arranged on main surface 111A to be a perfect conductor. Laminated glass 110 was a disc-shaped laminated glass in a plan view, and the radius was set to 1000 mm.

[0067] The length of the coaxial cable supplying power to the antenna element 52 was set to 100 mm. The ground conductor 53 was circular in plan view with a radius of 40 mm. The Low-E film 115 located on the main surface 112B was a circular conductor in plan view with a radius of 1000 mm. The centers of the circles of the ground conductor 53, the laminated glass 110, and the Low-E film 115 were aligned. The sheet resistance of the conductive film 115 was set to 0.8 Ω / sq.

[0068] Under these conditions, a simulation was performed while changing the thickness of the laminated glass 110 and changing the frequency of the signal supplied to the antenna element 52. The thickness of the laminated glass 110 was t mm for each of the glass plates 111 and 112, and 0.8 mm for the interlayer film 113, and the thickness t was changed from 1.5 mm to 5.1 mm.

[0069] In Figure 4, the results when the signal frequency is 86 MHz are shown with a black circle (●) marker and solid line, and the results when the frequency (Max) at which the maximum average gain was obtained for each frequency are shown with a white circle (○) marker and dashed line.

[0070] As a result, it was confirmed that whether the signal frequency was 86 MHz or Max, there was little change in the maximum gain with respect to the thickness of the laminated glass 110, and that the maximum gain was not affected as long as the thickness of the laminated glass 110 was within a practical range.

[0071] <Modification> Fig. 5 is a diagram showing an example of a cross-sectional configuration of an antenna-equipped vehicle window glass 100M according to a modified example of the embodiment. Fig. 5 shows an example of a cross-sectional configuration of the antenna-equipped vehicle window glass 100M attached to a vehicle body 10, similar to Fig. 1.

[0072] The antenna-equipped vehicle window glass 100M includes, as an example, an antenna device 50, a laminated glass 110M, and a flat harness 120M. The flat harness 120M is an example of a foil-like conductor. The antenna-equipped vehicle window glass 100M includes a laminated glass 110M and a flat harness 120M instead of the laminated glass 110 and the FPC 120 of the antenna-equipped vehicle window glass 100 shown in Fig. 1. Here, differences from the antenna-equipped vehicle window glass 100 shown in Fig. 1 will be described.

[0073] The laminated glass 110M has glass plates 111 and 112, an intermediate film 113, and a heat ray reflecting film 116. The heat ray reflecting film 116 is an example of a conductive film. In FIG. 5, the laminated glass 110M does not have the ceramic layer 114 and the Low-E film 115, but the laminated glass 110M may have the ceramic layer 114 and the Low-E film 115.

[0074] <Heat ray reflective film 116> As an example, the heat ray reflecting film 116 is provided on the indoor-side main surface 111B of the glass plate 111. However, the indoor-side main surface 111B of the glass plate 111 may have a portion on which the heat ray reflecting film 116 is not provided.

[0075] Here, a form will be described in which the heat ray reflecting film 116 is formed on the main surface 111B (second main surface) of the glass plate 111. However, the heat ray reflecting film 116 may be formed on a main surface other than the main surface 111B (second main surface), and may be formed on, for example, the main surface 112A (third main surface) of the glass plate 112 or the main surface 112B (fourth main surface) of the glass plate 112.

[0076] Furthermore, the main surface 112A (third main surface) of the glass plate 112 extends along the main surface 111B (second main surface) of the glass plate 111 and the main surface 112B (fourth main surface) of the glass plate 112. For this reason, the heat ray reflecting film 116 formed on the main surface 112A (third main surface) of the glass plate 112 corresponds to the heat ray reflecting film 116 being formed along the main surface 111B (second main surface) of the glass plate 111 or the main surface 112B (fourth main surface) of the glass plate 112.

[0077] The heat ray reflecting film 116 is capacitively coupled to the ground conductor 53. The heat ray reflecting film 116 is capacitively coupled to the ground conductor 53. The heat ray reflecting film 116 is capacitively coupled to the ground conductor 53 means that the heat ray reflecting film 116 and the ground conductor 53 are connected at high frequencies. If the heat ray reflecting film 116 is capacitively coupled to the ground conductor 53, the heat ray reflecting film 116 functions as a ground plane in addition to the ground conductor 53 when the antenna element 52 transmits and receives radio waves, and a current of a predetermined value or more corresponding to the current flowing through the antenna element 52 flows through the heat ray reflecting film 116.

[0078] The reason why the ground conductor 53 is capacitively coupled to the heat ray reflecting film 116 is to improve the antenna characteristics of the antenna device 50 by making the ground plane of the antenna device 50 large. In addition, since the ground conductor 53 can be made small, the antenna device 50 can be made more compact. In other words, it is possible to achieve both the miniaturization of the antenna device 50 and good antenna characteristics.

[0079] The heat ray reflecting film 116 may have any configuration as long as it can reflect infrared rays.

[0080] For example, the heat ray reflective film 116 may include at least one selected from the group including silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), and ion-doped metal oxide.

[0081] In particular, it is preferable to use ion-doped metal oxides, such as indium tin oxide (ITO), fluorine-doped tin oxide (FTO), aluminum-doped zinc oxide (AZO), and gallium zinc oxide (GZO).

[0082] It is preferable to use a heat ray reflecting film containing silver as a main component as the heat ray reflecting film 116. The thickness of the heat ray reflecting film 116 is not particularly limited, but is in the range of 100 nm to 1000 nm, for example.

[0083] As described above, the heat ray reflecting film 116 does not necessarily have to be provided on the entire main surface 111B of the glass plate 111. For example, the heat ray reflecting film 116 does not have to be disposed on a part of the area directly below the antenna device 50.

[0084] The heat ray reflecting film 116 is connected to one end of a flat harness 120M inserted between the glass plates 111 and 112 from the seam at the +X direction ends of the glass plates 111 and 112 of the laminated glass 110, and is electrically connected to the flange 11 of the vehicle body 10 via the flat harness 120M. Note that if the heat ray reflecting film 116 and the vehicle body 10 are capacitively coupled, the flat harness 120M does not need to be provided.

[0085] <Flat harness 120M> The flat harness 120M is a flat harness-like cable in which a foil-like conductor is covered with insulation. The flat harness 120M has one end electrically connected to the heat ray reflecting film 116 provided on the main surface 111B of the glass plate 111, and the other end drawn out from the joint of the +Z direction ends of the glass plates 111 and 112 to the outside of the laminated glass 110 and electrically connected to the vehicle body 10. As an example, the other end of the heat ray reflecting film 116 is folded back from the joint of the +Z direction ends of the glass plates 111 and 112 along the main surface 112B, passed through the adhesive 20, drawn into the interior of the vehicle, and connected to the surface of the flange 11 on the interior side of the vehicle. The electrical connection between the flat harness 120M and the vehicle body 10 may be either a direct current connection or a high frequency connection. Although Figure 5 shows a configuration in which the flat harness 120M connects between one location on the heat ray reflecting film 116 and one location on the vehicle body 10, the flat harness 120M may be connected to two or more locations on the heat ray reflecting film 116, or may be connected to two or more locations on the vehicle body 10.

[0086] 5, a Low-E film 115 may be provided on the main surface 111B of the glass plate 111 instead of the heat ray reflecting film 116. Moreover, both the heat ray reflecting film 116 and the Low-E film 115 may be provided.

[0087] <Effects> The vehicle window glass 100 with an antenna comprises an antenna device 50 having an antenna element 52, a core wire 71 of a coaxial cable 70 connected to the antenna element 52, a ground conductor 53, and a shield wire 72 of the coaxial cable 70 connected to the ground conductor 53, a composite glass having a through hole 110A attached to a window frame of a vehicle body 10 and penetrating between a main surface on the outside of the vehicle compartment and a main surface on the inside of the vehicle compartment, and a Low-E film 115 or a heat ray reflecting film 116 (conductive film) formed on the main surface on the inside of the vehicle compartment or along the main surface on the inside of the vehicle compartment. The antenna device 50 is attached to a portion of a main surface of the laminated glass 110 (glass plate) on the outer side of the vehicle cabin that overlaps with the through hole 110A, a core wire 71 of a coaxial cable 70 connected to an antenna element 52 of the antenna device 50 and a shield wire 72 of the coaxial cable 70 connected to a ground conductor 53 of the antenna device 50 are passed through the through hole 110A into the vehicle cabin, and a Low-E film 115 or a heat ray reflecting film 116 (conductive film) is capacitively coupled to the ground conductor 53. Therefore, in addition to the ground conductor 53, the Low-E film 115 or the heat ray reflecting film 116 functions as a ground plane, improving the antenna characteristics of the antenna device 50.

[0088] Therefore, it is possible to provide an antenna-equipped vehicle window glass 100 with excellent antenna characteristics.

[0089] Furthermore, the Low-E film 115 (conductive film) may be formed on a portion of the main surface on the vehicle interior side that overlaps with the antenna device 50 in a plan view. The Low-E film 115 formed on the portion that overlaps with the antenna device 50 overlaps with the ground conductor 53, and is therefore likely to be capacitively coupled. Therefore, by using the Low-E film 115 that overlaps with the ground conductor 53, the Low-E film 115 can be made to function as a ground plane more reliably, and it is possible to provide an antenna-equipped vehicle window glass 100 having better antenna characteristics.

[0090] Moreover, the conductive film may be a Low-E film. By making the Low-E film 115 function as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 with good antenna characteristics.

[0091] Furthermore, the Low-E film 115 (conductive film) may be electrically connected to the shield wire 72 of the coaxial cable 70. By using the Low-E film 115 electrically connected to the shield wire 72 of the coaxial cable 70 as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 having good antenna characteristics.

[0092] In addition, the Low-E film 115 (conductive film) may be electrically connected to the vehicle body 10. By using the Low-E film 115 electrically connected to the vehicle body 10 as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 having good antenna characteristics.

[0093] The antenna may further include an FPC 120 (connecting conductor) having one end electrically connected to the Low-E film 115 (conductive film) and the other end electrically connected to the vehicle body 10. By using the Low-E film 115 electrically connected to the vehicle body 10 via the FPC 120 as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 having good antenna characteristics.

[0094] In addition, the Low-E film 115 (conductive film) may be capacitively coupled to the vehicle body 10. By using the Low-E film 115 capacitively coupled to the vehicle body 10 as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 having good antenna characteristics.

[0095] The glass plate may be tempered glass. By capacitively coupling the ground conductor 53 of the antenna device 50 provided on the single-pane glass with the Low-E film 115 or the heat ray reflecting film 116, the Low-E film 115 or the heat ray reflecting film 116 functions as a ground plane in addition to the ground conductor 53, improving the antenna characteristics of the antenna device 50. Therefore, in a configuration using single-pane glass, it is possible to provide an antenna-equipped vehicle window glass 100 with good antenna characteristics.

[0096] The laminated glass 110 may also be a laminated glass having a glass plate 111 having a main surface 111A (first main surface) on the outside of the vehicle compartment and a main surface 111B (second main surface) on the inside of the vehicle compartment, a glass plate 112 located on the inside of the vehicle compartment from the glass plate 111 and having a main surface 112A (third main surface) on the outside of the vehicle compartment and a main surface 112B (fourth main surface) on the inside of the vehicle compartment, and an intermediate film 113 provided between the glass plate 111 and the glass plate 112. The ground conductor 53 of the antenna device 50 provided on the laminated glass 110 and the Low-E film 115 or the heat ray reflecting film 116 are capacitively coupled, so that the Low-E film 115 or the heat ray reflecting film 116 functions as a ground plane in addition to the ground conductor 53, and the antenna characteristics of the antenna device 50 are improved. Therefore, in a configuration using the laminated glass 110, it is possible to provide an antenna-equipped vehicle window glass 100 with good antenna characteristics.

[0097] Furthermore, the Low-E film 115 (conductive film) may be formed on the principal surface 112B (fourth principal surface). By making the Low-E film 115 formed on the principal surface 112B function as a ground plane, it is possible to provide the antenna-equipped vehicle window glass 100 with good antenna characteristics.

[0098] The antenna device 50 may further include a ceramic layer 114 (shielding layer) formed on the main surface 111B (second main surface), the main surface 112A (third main surface), or the main surface 112B (fourth main surface) in a region overlapping with a region in which the antenna device 50 is formed in a plan view. The ceramic layer 114 can hide the antenna device 50 from the inside of the vehicle compartment, improving the appearance of the antenna-equipped vehicle window glass 100 from the inside of the vehicle compartment.

[0099] The glass plate 112 may have a Low-E film formed on the main surface 112B (fourth main surface). By making the Low-E film 115 provided on the main surface 112B function as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100 with good antenna characteristics.

[0100] Moreover, the antenna device 50 may further include a ceramic layer 114 (shielding layer) formed on the main surface 112B (fourth main surface), and the ceramic layer 114 (shielding layer) may be formed in a region of the main surface 112B (fourth main surface) that overlaps with a region in which the antenna device 50 is arranged in a plan view. The ceramic layer 114 (shielding layer) is formed in a region of the main surface 112B (fourth main surface) that overlaps with a region in which the antenna device 50 is arranged in a plan view, and an antenna-equipped vehicle window glass 100 having good antenna characteristics can be provided.

[0101] Moreover, the heat ray reflecting film 116 (conductive film) may be formed on the main surface 111B (second main surface). By making the heat ray reflecting film 116 provided on the main surface 111B function as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100M with good antenna characteristics.

[0102] The heat ray reflecting film 116 (conductive film) may be a heat ray reflecting film mainly made of silver. By making the heat ray reflecting film 116 mainly made of silver function as a ground plane, it is possible to provide the antenna-equipped vehicle window glass 100M having good antenna characteristics.

[0103] Moreover, the heat ray reflecting film 116 (conductive film) may be electrically connected to the shield wire 72 of the coaxial cable 70. By making the heat ray reflecting film 116 function as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100M having good antenna characteristics.

[0104] The glass may further include a flat harness 120M (foil-like conductor) having one end electrically connected to the heat ray reflecting film 116 (conductive film) and the other end drawn out from the joint between the glass sheets 111 and 112 to the outside of the laminated glass and electrically connected to the vehicle body 10. By using the Low-E film 115 electrically connected to the vehicle body 10 via the flat harness 120M as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100M having good antenna characteristics.

[0105] Moreover, the heat ray reflecting film 116 (conductive film) may be capacitively coupled to the vehicle body 10. By making the heat ray reflecting film 116 capacitively coupled to the vehicle body 10 function as a ground plane, it is possible to provide an antenna-equipped vehicle window glass 100M having good antenna characteristics.

[0106] The vehicle 1 includes a vehicle body 10 and an antenna-equipped vehicle window glass 100. The antenna-equipped vehicle window glass 100 includes an antenna device 50 having an antenna element 52, a core wire 71 of a coaxial cable 70 connected to the antenna element 52, a ground conductor 53, and a shield wire 72 of the coaxial cable 70 connected to the ground conductor 53, a through hole 110A attached to a window frame of the vehicle body 10 and penetrating between a main surface on the outside of the vehicle compartment and a main surface on the inside of the vehicle compartment, and a Low-E film 11 formed on the main surface on the inside of the vehicle compartment or along the main surface on the inside of the vehicle compartment. The antenna device 50 is attached to a portion of the main surface on the outer side of the vehicle cabin that overlaps with the through hole 110A, and a core wire 71 of a coaxial cable 70 connected to an antenna element 52 of the antenna device 50 and a shield wire 72 of the coaxial cable 70 connected to a ground conductor 53 of the antenna device 50 are passed through the through hole 110A into the vehicle cabin, and the Low-E film 115 or the heat ray reflecting film 116 (conductive film) is capacitively coupled to the ground conductor 53. Therefore, in addition to the ground conductor 53, the Low-E film 115 or the heat ray reflecting film 116 functions as a ground plane, improving the antenna characteristics of the antenna device 50.

[0107] Therefore, it is possible to provide a vehicle 1 with good antenna characteristics.

[0108] Although exemplary vehicle window glass with an antenna and a vehicle according to the present disclosure have been described above, the present disclosure is not limited to the specifically disclosed embodiments, and various modifications and changes are possible without departing from the scope of the claims.

[0109] Regarding the above embodiment, the following supplementary notes are further disclosed. (Appendix 1) an antenna device including an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground line connected to the ground conductor; a glass plate attached to a window frame of a vehicle body, the glass plate having a through hole penetrating between a main surface on an exterior side of a vehicle compartment and a main surface on an interior side of the vehicle compartment, and a conductive film formed on the main surface on the interior side of the vehicle compartment or formed along the main surface on the interior side of the vehicle compartment, the antenna device being attached to a portion of the main surface on the exterior side of the vehicle compartment that overlaps with the through hole; Including, a signal line connected to an antenna element of the antenna device and a ground line connected to a ground conductor of the antenna device are passed through the through hole into the vehicle interior, The conductive film is capacitively coupled to the ground conductor. (Appendix 2) 2. The vehicle window glass with an antenna according to claim 1, wherein the conductive film is formed on a portion of the main surface facing the interior of the vehicle that overlaps with the antenna device in a plan view. (Appendix 3) 3. The antenna-equipped vehicle window glass according to claim 1, wherein the conductive film is a Low-E film. (Appendix 4) 4. The antenna-equipped vehicle window glass according to claim 1, wherein the conductive film is electrically connected to the ground line. (Appendix 5) 4. The antenna-equipped vehicle window glass according to claim 1, wherein the conductive film is electrically connected to the vehicle body. (Appendix 6) 6. The vehicle window glass with an antenna according to claim 5, further comprising a connection conductor having one end electrically connected to the conductive film and the other end electrically connected to the vehicle body. (Appendix 7) 6. The antenna-equipped vehicle window glass according to claim 5, wherein the conductive film is capacitively coupled to the vehicle body. (Appendix 8) 8. The antenna-equipped vehicle window glass according to claim 1, wherein the glass plate is a tempered glass. (Appendix 9) The glass plate is A first glass plate having a first main surface on an outer side of the vehicle cabin and a second main surface on an inner side of the vehicle cabin; a second glass plate located closer to the vehicle interior than the first glass plate, the second glass plate having a third main surface on the vehicle exterior side and a fourth main surface on the vehicle interior side; an intermediate film provided between the first glass plate and the second glass plate; 8. The antenna-equipped vehicle window glass according to claim 1, which is a laminated glass having the above structure. (Appendix 10) 10. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is formed on the fourth main surface. (Appendix 11) 11. The vehicle window glass with an antenna according to claim 9 or 10, further comprising a shielding layer formed on the second principal surface, the third principal surface, or the fourth principal surface in a region overlapping with a region in which the antenna device is formed in a plan view. (Appendix 12) 10. The antenna-equipped vehicle window glass according to claim 9, wherein the second glass plate has a Low-E film formed on the fourth main surface. (Appendix 13) Further comprising a shielding layer formed on the fourth main surface, 13. The vehicle window glass with an antenna according to claim 12, wherein the shielding layer is formed in a region of the fourth main surface that overlaps with a region in which the antenna device is arranged in a plan view. (Appendix 14) 10. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is formed on the second main surface or the third main surface. (Appendix 15) 15. The vehicle window glass with an antenna according to claim 14, wherein the conductive film is a heat ray reflective film mainly composed of silver. (Appendix 16) 16. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is electrically connected to the ground line. (Appendix 17) 17. The vehicle antenna-equipped window glass according to claim 16, further comprising a foil-shaped conductor having one end electrically connected to the conductive film and the other end drawn out from a joint between the first glass sheet and the second glass sheet to the outside of the laminated glass and electrically connected to the vehicle body. (Appendix 18) 18. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is capacitively coupled to the vehicle body. (Appendix 19) The car body and Vehicle window glass with antenna and Including, The antenna-equipped vehicle window glass comprises: an antenna device including an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground line connected to the ground conductor; a glass plate attached to a window frame of a vehicle body, the glass plate having a through hole penetrating between a main surface on an exterior side of a vehicle compartment and a main surface on an interior side of the vehicle compartment, and a conductive film formed on the main surface on the interior side of the vehicle compartment or formed along the main surface on the interior side of the vehicle compartment, the antenna device being attached to a portion of the main surface on the exterior side of the vehicle compartment that overlaps with the through hole; Including, a signal line connected to an antenna element of the antenna device and a ground line connected to a ground conductor of the antenna device are passed through the through hole into the vehicle interior, The conductive film is capacitively coupled to the ground conductor. [Explanation of symbols]

[0110] 1 vehicle 10. Body 11 Flange 50 Antenna equipment 51 Antenna body 60 Spacer 100, 100M Vehicle window glass with antenna 110, 110M Laminated Glass 110A through hole 111 Glass plate (an example of the first glass plate) 111A Principal surface (an example of the first principal surface) 111B Principal surface (an example of the second principal surface) 112 Glass plate (an example of a second glass plate) 112A Principal surface (an example of the third principal surface) 112B Principal surface (an example of the fourth principal surface) 113 Interlayer 114 Ceramic layer (an example of a shielding layer) 115 Low-E film (an example of a conductive film) 116 Heat ray reflecting film (an example of a conductive film) 120 FPC (an example of a connecting conductor) 120M flat harness (an example of a foil conductor)

Claims

1. an antenna device including an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground line connected to the ground conductor; a glass plate attached to a window frame of a vehicle body, the glass plate having a through hole penetrating between a main surface on an exterior side of a vehicle compartment and a main surface on an interior side of the vehicle compartment, and a conductive film formed on the main surface on the interior side of the vehicle compartment or formed along the main surface on the interior side of the vehicle compartment, the antenna device being attached to a portion of the main surface on the exterior side of the vehicle compartment that overlaps with the through hole; Including, a signal line connected to an antenna element of the antenna device and a ground line connected to a ground conductor of the antenna device are passed through the through hole into the vehicle interior, The conductive film is capacitively coupled to the ground conductor.

2. The antenna-equipped vehicle window glass according to claim 1 , wherein the conductive film is formed on a portion of the main surface facing the interior of the vehicle that overlaps with the antenna device in a plan view.

3. 3. The antenna-equipped vehicle window glass according to claim 1, wherein the conductive film is a Low-E film.

4. The antenna-equipped vehicle window glass according to claim 1 , wherein the conductive film is electrically connected to the ground line.

5. The antenna-equipped vehicle window glass according to claim 1 , wherein the conductive film is electrically connected to the vehicle body.

6. 6. The vehicle window glass with an antenna according to claim 5, further comprising a connection conductor having one end electrically connected to the conductive film and the other end electrically connected to the vehicle body.

7. The antenna-equipped vehicle window glass according to claim 5 , wherein the conductive film is capacitively coupled to the vehicle body.

8. 3. The antenna-equipped vehicle window glass according to claim 1, wherein the glass plate is a tempered glass.

9. The glass plate is a first glass plate having a first main surface on an outer side of the vehicle cabin and a second main surface on an inner side of the vehicle cabin; a second glass plate located closer to the vehicle interior than the first glass plate, the second glass plate having a third main surface on the vehicle exterior side and a fourth main surface on the vehicle interior side; an intermediate film provided between the first glass plate and the second glass plate; The antenna-equipped vehicle window glass according to claim 1 or 2, which is a laminated glass having the above structure.

10. 10. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is formed on the fourth main surface.

11. 10. The vehicle window glass with an antenna according to claim 9, further comprising a shielding layer formed on the second main surface, the third main surface, or the fourth main surface in a region overlapping with a region in which the antenna device is formed in a plan view.

12. 10. The antenna-equipped vehicle window glass according to claim 9, wherein the second glass plate has a Low-E film formed on the fourth main surface.

13. further comprising a shielding layer formed on the fourth main surface; The vehicle window glass with an antenna according to claim 12, wherein the shielding layer is formed in a region of the fourth main surface that overlaps with a region in which the antenna device is disposed in a plan view.

14. 10. The antenna-equipped vehicle window glass according to claim 9, wherein the conductive film is formed on the second main surface or the third main surface.

15. 15. The antenna-equipped vehicle window glass according to claim 14, wherein the conductive film is a heat ray reflective film containing silver as a main component.

16. The antenna-equipped vehicle window glass according to claim 9 , wherein the conductive film is electrically connected to the ground line.

17. 17. The vehicle window glass with an antenna according to claim 16, further comprising a foil-shaped conductor having one end electrically connected to the conductive film and the other end drawn out from a joint between the first glass sheet and the second glass sheet to an outside of the laminated glass and electrically connected to the vehicle body.

18. The antenna-equipped vehicle window glass according to claim 9 , wherein the conductive film is capacitively coupled to the vehicle body.

19. The car body and Vehicle window glass with antenna and Including, The antenna-equipped vehicle window glass comprises: an antenna device including an antenna element, a signal line connected to the antenna element, a ground conductor, and a ground line connected to the ground conductor; a glass plate attached to a window frame of a vehicle body, the glass plate having a through hole penetrating between a main surface on an exterior side of a vehicle compartment and a main surface on an interior side of the vehicle compartment, and a conductive film formed on the main surface on the interior side of the vehicle compartment or formed along the main surface on the interior side of the vehicle compartment, the antenna device being attached to a portion of the main surface on the exterior side of the vehicle compartment that overlaps with the through hole; Including, a signal line connected to an antenna element of the antenna device and a ground line connected to a ground conductor of the antenna device are passed through the through hole into the vehicle interior, The conductive film is capacitively coupled to the ground conductor.

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