Antenna device, antenna device installation method

Abstract

To provide an antenna device and an antenna device installation method that allow the unit to be removed while the antenna element (element portion) remains attached to a vehicle.SOLUTION: An antenna device comprises an element portion mounted on a vehicle structure and a unit detachable from the element portion. An antenna device installation method includes mounting the element portion to the vehicle structure, connecting an antenna element of the element portion to a reactance element of the unit, and holding the unit to the vehicle structure.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an antenna device and a method for mounting the antenna device. [Background technology]

[0002] Patent Document 1 discloses an antenna device that is attached to a vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-75649 Summary of the Invention [Problem to be solved by the invention]

[0004] In the antenna device of Patent Document 1, an element section including an antenna element and a unit including a board on which an amplifier etc. are arranged are integrally configured. In such an antenna device, if, for example, the amplifier etc. breaks down, it is necessary to remove the entire antenna device attached to the vehicle.

[0005] One example of an object of the present invention is to make it possible to remove the unit while the antenna element (element portion) remains attached to the vehicle. Other objects of the present invention will become apparent from the description of this specification. [Means for solving the problem]

[0006] One aspect of the present invention is an antenna device including an element portion that is attached to a vehicle structure, and a unit that is detachable from the element portion.

[0007] One aspect of the present invention is a method for attaching an antenna device to a vehicle, the antenna device comprising an element portion to be attached to a vehicle structure and a unit that is detachable from the element portion, the method comprising attaching the element portion to the vehicle structure, connecting the antenna element of the element portion to the reactance element of the unit, and fixing the unit to the vehicle structure.

[0008] According to the above aspect of the present invention, it is possible to remove the unit while the antenna element (element portion) remains attached to the vehicle. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram showing the position of the antenna device 10 on the frame of a vehicle C. FIG. [Figure 2] FIG. 2 is an exploded perspective view of the antenna device 10. [Figure 3] FIG. 2 is an exploded perspective view of the element portion 20. [Figure 4] FIG. 2 is an exploded perspective view of the unit 21. [Figure 5] 1 is a schematic diagram showing a state before the unit 21 is housed in the element section 20. FIG. [Figure 6] 10 is a schematic diagram showing a state after the unit 21 is housed in the element section 20. FIG. [Figure 7] 10 is a schematic diagram for explaining the connection state between the antenna element 30c and the helical element 403. FIG. [Figure 8] 10 is a schematic diagram for explaining the connection state between antenna element 30d and helical element 403. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] At least the following matters will become clear from the description of this specification and the accompanying drawings.

[0011] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. The same or equivalent components, members, etc. shown in each drawing are designated by the same reference numerals, and redundant explanations will be omitted where appropriate.

[0012] ===Outline of Antenna Device 10=== 1 is a diagram showing the position of the antenna device 10 on the frame (structural body) of a vehicle C. First, with reference to FIG. 1, the directions and the like in the antenna device 10 will be defined.

[0013] <<Definition of direction etc.>> In the following description, directions are defined based on the vehicle C as shown in Figure 1. The front-to-rear direction of the vehicle C is the X direction, the left-to-right direction perpendicular to the X direction is the Y direction, and the vertical direction perpendicular to the X and Y directions is the Z direction.

[0014] In addition, the front side from the driver's seat of the vehicle is the +X direction, the right side is the +Y direction, and the zenith direction (upward) is the +Z direction. Hereinafter, in this embodiment, the front-rear, left-right, and up-down directions of the antenna device 10 will be described as being the same as the front-rear, left-right, and up-down directions of the vehicle C.

[0015] The +X direction, -X direction, +Y direction, -Y direction, +Z direction, and -Z direction are each directions with a fixed orientation. Rather than directions with a fixed orientation as described above, both the +X direction and the -X direction may be simply referred to as the "X direction." Similarly, both the +Y direction and the -Y direction may be simply referred to as the "Y direction." Furthermore, both the +Z direction and the -Z direction may be simply referred to as the "Z direction."

[0016] In Fig. 1, the +X direction, +Y direction, and +Z direction are each represented by an arrowed line segment to facilitate understanding of directions and the like in the antenna device 10. Note that the intersection of these arrowed line segments does not indicate the coordinate origin. The definitions of the above-mentioned directions and the like are common throughout this specification unless otherwise specified.

[0017] <<Outline of the Antenna Device 10 and Installation Position>> The metal frame, which is the structural body of the vehicle C, is configured to include a reinforcing member R1 in the ceiling portion of the vehicle C and roof side rails R2, R3. The reinforcing member R1 is a so-called reinforcement of the vehicle C, and is provided between the roof side rails R2, R3. The reinforcing member R1 is formed by welding two bent metal plates 100, 101.

[0018] The antenna device 10 is a device that is compatible with radio broadcasts, for example, AM / FM radio waves, and is attached to approximately the center in the left-right direction of the reinforcing member R1. The case 11 is a member that covers the outside of the antenna device 10. In this embodiment, the antenna device 10 and the case 11 are housed in the space between a dielectric roof panel P that transmits electromagnetic waves (hereinafter referred to as "radio waves") and a roof liner (not shown) on the ceiling of the vehicle interior. Note that the case 11 that covers the outside of the antenna device 10 does not necessarily have to be provided.

[0019] <<Details of the Reinforcing Member R1 and the Antenna Device 10>> The reinforcing member R1 and the antenna device 10 will be described in detail with reference to Figures 2 to 4. Figure 2 is an exploded perspective view of the antenna device 10. Figure 3 is an exploded perspective view of the element section 20, and Figure 4 is an exploded perspective view of the unit 21.

[0020] 2, a substantially quadrilateral opening 110 into which the -Z side portion of a first holder 31 (described later) is inserted is formed in metal plate 100 on the +Z side of reinforcing member R1. Also, openings 120, 121a, 121b, 122a, and 122b are formed in metal plate 101 located on the -Z side of metal plate 100.

[0021] "Approximately quadrilateral" refers to a shape consisting of four sides, including, for example, a square or a rectangle, and may have at least some corners cut out at an angle to the sides. Also, in an "approximately quadrilateral" shape, some of the sides may have a notch (recess) or a protrusion (convex). Note that in this embodiment, the same applies when adding "approximately" to other shapes (for example, a circle or a rectangular parallelepiped).

[0022] Opening 120 is a substantially circular hole into which unit 21 (described later) is inserted. Openings 121a and 121b are holes for attaching first holder 31 (described later) to metal plate 101, and openings 122a and 122b are holes for fixing antenna device 10 to metal plate 101. Note that the shapes of openings 110, 120, etc. described above may be any shape as long as it matches the intended use.

[0023] The antenna device 10 includes an element section 20 and a unit 21. The element section 20 includes antenna elements 30a and 30b and a first holder 31.

[0024] <Element section 20> The antenna element 30a is a sheet metal-like capacitive loading element that supports radio broadcasting waves, particularly AM radio broadcasting waves, and includes a main body 300a and an extension 301a. The main body 300a has a substantially quadrilateral shape that supports AM radio waves, and the extension 301a is a flat plate-like portion that extends in the -Z direction (downward) from the main body 300a. The lower end of the extension 301a functions as a so-called power feeder.

[0025] The antenna element 30a in this embodiment is a so-called sheet metal element, but is not limited to this. For example, a conductor pattern formed on a first holder 31 (described later) may be used as part of the antenna element 30a. Furthermore, a film antenna or a conductor pattern formed on a substrate may be used as the antenna element 30a.

[0026] Antenna element 30b is a metal-plate-like capacitance-loading element that supports radio broadcast waves, particularly FM radio broadcast waves, and includes a main body 300b and an extension 301b. Since main body 300b and extension 301b of antenna element 30b are similar to main body 300a and extension 301a, respectively, detailed description thereof will be omitted.

[0027] The first holder 31 is a component that holds the antenna elements 30a and 30b, and includes a housing portion 310, support portions 311a and 311b, attachment portions 312a and 312b, and openings 320a, 320b, and 321.

[0028] The accommodation section 310 is a member having an accommodation space S1 for accommodating the unit 21, and has a substantially rectangular parallelepiped shape. An opening 320a into which the extension portion 301a of the antenna element 30a is inserted and an opening 320b into which the extension portion 301b of the antenna element 30b is inserted are formed on the +Z side surface of the accommodation section 310. An opening 321 for accommodating the unit 21 in the accommodation space S1 is also formed on the -Z side of the accommodation section 310.

[0029] A support portion 311a for supporting antenna element 30a is formed on the -Y side surface of housing portion 310, and a support portion 311b for supporting antenna element 30b is formed on the +Y side surface.

[0030] Mounting portions 312a, 312b for mounting first holder 31 to reinforcing member R1 are formed on the +X side surface and the -X side surface of accommodation portion 310, respectively. As shown in the enlarged view of FIG. 3, protrusion 330a formed on the end portion of mounting portion 312a in the -Z direction is inserted into opening 121a of metal plate 101 through opening 110 formed in metal plate 100. Note that protrusion 330b of mounting portion 312b is also inserted into opening 121b, similar to protrusion 330a.

[0031] Then, the protrusions 330a and 330b are fitted into the openings 121a and 121b, respectively, so that the first holder 31 is attached to a predetermined position on the metal plate 101. Therefore, the openings 121a and 121b in this embodiment are holes for attaching the first holder 31 to the metal plate 101, and also function as holes (positioning holes) for determining the position of the first holder 31 on the metal plate 101.

[0032] <Unit 21> The unit 21 constitutes the antenna device 10 together with the element section 20, and is a component that is detachable from the element section 20. As shown in FIG.

[0033] == Circuit Board Unit 40 == The board unit 40 is a component on which electronic components of the antenna device 10 are attached, and includes a board 400, a support member 401, a second holder 402, a helical element (coil) 403, a reactance element 406, metal members 404 and 405, and an amplifier 407.

[0034] A support member 401 is attached to the end of the substrate 400 on the +Y side with screws 421a and 421b (described later). The screws 421a and 421b are fastened to two screw holes (not shown) formed inside the case 41 through two openings formed on both ends of the support member 401.

[0035] Support member 401 is a component for supporting second holder 402, and second holder 402 is a component for holding helical element 403. Helical element 403, together with antenna element 30b, is an element that corresponds to radio broadcast waves, specifically, an element that corresponds to FM radio broadcast.

[0036] Metal member 404 is a member that connects antenna element 30b and helical element 403, and has clamping portion 501 that is bent into a substantially M shape when viewed from the X direction. Note that metal member 404 in this embodiment is connected to one end of helical element 403.

[0037] When the extension portion 301b is inserted into the gap formed by bending the clamping portion 501, the clamping portion 501 clamps the extension portion 301b by its elastic force. As will be described in detail later, this results in a connection between the antenna element 30b and the helical element 403. In this embodiment, the antenna element 30b and the helical element 403 are electrically connected.

[0038] Metal member 405 is a member that connects antenna element 30a and reactance element 406, and has main body 510 and clamping portion 512. Main body 510 is a member that extends in the Z direction, and its end in the -Z direction is connected to substrate 400. Clamping portion 512 is formed on the end in the +Z direction of main body 510.

[0039] When the extension portion 301a is inserted into the gap formed by bending the clamping portion 512, the clamping portion 512 clamps the extension portion 301a by its elastic force.

[0040] Reactance element 406, together with antenna element 30a, is a reactance element that responds to radio broadcast waves, specifically AM radio broadcast waves. Reactance element 406 is used, for example, to adjust the impedance of the wiring that connects metal member 405 and amplifier 407.

[0041] Amplifier 407 is an integrated circuit that amplifies radio broadcast signals, specifically at least one of AM radio broadcast signals and FM radio broadcast signals. Amplifier 407 is connected to a terminal of helical element 403, for example, via a wiring pattern (not shown) formed on substrate 400. The terminal of helical element 403 connected to amplifier 407 is one of the two terminals of helical element 403, different from the terminal connected to metal member 404. Amplifier 407 is also connected to metal member 405 and reactance element 406 via wiring patterns (not shown) formed on substrate 400.

[0042] ==Case 41== The case 41 is a housing that houses the board unit 40 and covers the outside of the unit 21. The case 41 has a housing portion 410, guide portions 411a and 411b, leaf springs 412a and 412b, and openings 413a, 413b, and 414.

[0043] The accommodation section 410 is a member having an accommodation space S2 formed therein for accommodating the board unit 40, and has a substantially rectangular parallelepiped shape. An opening 413a into which the extension portion 301a of the antenna element 30a is inserted and an opening 413b into which the extension portion 301b of the antenna element 30b is inserted are formed on the +Z side surface of the accommodation section 410. Furthermore, an opening 414 is formed on the -Z side of the accommodation section 410 for accommodating the board unit 40 in the accommodation space S2.

[0044] A guide portion 411a that guides case 41 into first holder 31, and a leaf spring 412a are formed on the -Y side surface of accommodating portion 310. Guide portion 411a is fitted into a predetermined recess (not shown) formed on the -Y side surface inside first holder 31. Furthermore, although details will be described later, leaf spring 412a is a portion that temporarily fixes unit 21 inside first holder 31 by its elastic force when case 41 (i.e., unit 21) is accommodated in first holder 31.

[0045] A guide portion 411b and a leaf spring 412b that guide the case 41 to the first holder 31 are formed on the +Y side surface of the accommodating portion 310. The guide portion 411b and the leaf spring 412b are similar to the guide portion 411a and the leaf spring 412a, respectively, and therefore detailed description thereof will be omitted here.

[0046] ==Mounting Unit 42== The mounting unit 42 mounts the board unit 40 to the case 41 and also fixes the unit 21 to the metal plate 101 of the reinforcing member R1. The mounting unit 42 includes a mounting bracket 420, screws 421a, 421b, 422a to 422d, 423a, 423d, and nuts 424a, 424b.

[0047] The mounting bracket 420 uses screws 421a and 421b to fix the support member 401 to the board 400, and screws 422a to 422d to fix the board 400 to the case 41. The screws 421a, 421b, and 422a to 422d are fastened into screw holes (not shown) formed inside the case 41. As a result, the board unit 40, the case 41, and the mounting unit 42 are integrated into the unit 21.

[0048] As will be described in detail later, the integrated unit 21 is housed in the element section 20 attached to the metal plate 101. Thereafter, the mounting bracket 420 attached to the housed unit 21 is fixed to the metal plate 101. As a result, the antenna device 10 is fixed to the reinforcing member R1.

[0049] <<Method of installing the antenna device 10>> 5 and 6, a method for attaching the antenna device 10 to the reinforcing member R1 will be described. Note that, here, it is assumed that the element section 20 and the unit 21 are integrated. That is, in the element section 20, the antenna elements 30a and 30b are attached to the first holder 31, and in the unit 21, the board unit 40 and the case 41 are fixed with a mounting bracket 420 or the like.

[0050] Fig. 5 is a schematic diagram showing a state before the unit 21 is housed in the element portion 20, and Fig. 6 is a schematic diagram showing a state after the unit 21 is housed in the element portion 20. For convenience, the element portion 20, the unit 21, and the metal plates 100 and 101 are depicted in a simplified form in Figs. 5 and 6.

[0051] A method for attaching the antenna device 10 to the reinforcing member R1 will be described with reference to FIGS. 2 and 3. First, as indicated by the dotted arrow in FIG. 2, the element unit 20 is attached to the metal plate 101 from the surface of the metal plate 101 facing in the +Z direction (attachment step). Specifically, as shown in the enlarged view of FIG. 3, the attachment portions 312a and 312b of the first holder 31 of the element unit 20 are inserted into the openings 121a and 121b of the metal plate 101, respectively. As a result, the element unit 20 is attached to the metal plate 101, as shown in the schematic view of FIG. 5. In other words, the element unit 20 is temporarily fixed to the metal plate 101.

[0052] In this embodiment, the element portion 20 is temporarily fixed to the metal plate 101, but this is not limiting, and for example, the element portion 20 and the metal plate 101 may be fixed with screws, adhesive, or the like. In other words, "a state in which the element portion 20 is attached to the metal plate 101" includes not only a state in which the element portion 20 is temporarily fixed to the metal plate 101, but also a state in which the element portion 20 is fixed.

[0053] Next, as shown by the dashed-dotted arrow in FIG. 2 and the dashed-dotted arrow in FIG. 5, the unit 21 is inserted into the accommodation space S1 of the first holder 31 from the -Z direction surface side of the metal plate 101 (insertion step).

[0054] Then, the unit 21 is accommodated in the accommodation space S1 of the first holder 31, and the antenna elements 30a and 30b are connected to the helical element 403 and the reactance element 406, respectively, as shown in Fig. 6 (connection step). Note that here, "a state in which the unit 21 is accommodated in the accommodation space S1" refers to a state in which the unit 21 is temporarily fixed inside the first holder 31 by the elastic force of the leaf springs 412a and 412b of the case 41, for example.

[0055] Furthermore, the "state in which the antenna element 30b and the helical element 403 are connected" refers to, for example, a state in which the extension portion 301b of the antenna element 30b is connected to the metal member 404, and the antenna element 30b is electrically connected to the helical element 403 via the metal member 404 (clamping portion 501).

[0056] Furthermore, the "state in which the antenna element 30a and the reactance element 406 are connected" refers to, for example, a state in which the extension portion 301a of the antenna element 30a is connected to the metal member 405, and the antenna element 30a is electrically connected to the reactance element 406 via the metal member 405 (clamping portion 512).

[0057] Once the unit 21 is housed in the first holder 31 and the antenna elements 30a and 30b, the helical element 403, and the reactance element 406 are connected, the unit 21 is fixed to the metal plate 101 as shown by the two-dot chain arrow in FIG. 2 (fixing step). Specifically, as shown in FIG. 4, screws 423a and 423b and nuts 424a and 424b are fastened so that the mounting bracket 420 of the mounting unit 42 is fixed to the metal plate 101. As a result, the antenna device 10 is attached to the reinforcing member R1. In this embodiment, the antenna device 10 is fixed to the reinforcing member R1.

[0058] Incidentally, in the antenna device 10, it may be necessary to replace the amplifier 407 mounted on the substrate 400. In such a case, in this embodiment, when the mounting bracket 420 is removed from the metal plate 101, the unit 21 can be removed from the accommodation space S1 of the element section 20. That is, in this embodiment, for example, by removing a roof liner (not shown) of the vehicle C, the worker can remove the unit 21 attached to the element section 20 from the element section 20.

[0059] As described above, in this embodiment, the unit 21, which is the desired component, can be removed while the element portion 20 remains attached to the reinforcing member R1, improving convenience for the worker. Note that, although the antenna device 10 is attached to the reinforcing member R1 in this embodiment, the present invention is not limited to this and the antenna device 10 may be attached to other vehicle structures, such as a pillar or a roof panel. Even in such a case, the same effect can be obtained because the present embodiment uses a detachable unit 21 for the element portion 20. <<Modifications>>

[0060] For example, in the above-described antenna device 10, the extension portion 301b of the antenna element 30b is held by the metal member 404 of the board unit 40, but this is not limiting. The shape of the portion connecting the antenna element and the reactance element may be other shapes.

[0061] Fig. 7 is a schematic diagram illustrating the connection state between antenna element 30c and helical element 403. Antenna element 30c in Fig. 7 is a capacitance-loading element similar to antenna element 30b in Fig. 3. Specifically, antenna element 30c is an element that responds to radio broadcast waves, specifically a sheet metal element that responds to FM radio waves, and includes main body 300c and extension 301c.

[0062] Main body 300c is similar to main body 300b, but extension 301c has a different shape from extension 301b. A clamping portion 361 having a shape similar to that of metal member 404 in FIG. 4 is formed at the end of extension 301c in the -Z direction.

[0063] 7 is a unit similar to substrate unit 40, and is configured to include substrate 400, support member 401, helical element 403, and metal member 408. For convenience, only a portion of the configuration of substrate unit 45 is shown in FIG.

[0064] Metal member 408 is a flat plate-like member as shown in the enlarged view of Fig. 7. Even in such a case, when unit 21 including substrate unit 45 is housed in first holder 31 to which antenna element 30c is attached, antenna element 30c and helical element 403 are connected.

[0065] The "state in which the antenna element 30c and the helical element 403 are connected" refers to, for example, a state in which the metal member 408 is clamped by the clamping portion 361, and the antenna element 30c is electrically connected to the helical element 403 via the clamping portion 361.

[0066] Fig. 8 is a schematic diagram illustrating the connection state between antenna element 30d and helical element 403. Antenna element 30d in Fig. 8 is a capacitance-loading element similar to antenna element 30b in Fig. 3. Specifically, antenna element 30d is a sheet metal element compatible with FM radio waves, and includes a main body 300d and an extension 301d.

[0067] Main body 300d is similar to main body 300b, but extension 301d has a different shape from extension 301b. The end of extension 301d in the -Z direction is bent in the +Y direction to form an opening.

[0068] 8 is a unit similar to substrate unit 40, and is configured to include substrate 400, support member 401, helical element 403, metal member 409, and metal screw 600. For convenience, only a portion of the configuration of substrate unit 46 is shown in FIG.

[0069] As shown in the enlarged view of Fig. 8, metal member 409 is a flat plate-shaped member with its tip bent in the +Y direction. An opening (not shown) is formed in the bent portion of metal member 409. In Fig. 8, extension portion 301d and metal member 409 are fastened together with screw 600.

[0070] Even in such a case, when unit 21 including substrate unit 46 is housed in first holder 31 to which antenna element 30c is attached and screw 600 is tightened, antenna element 30d and helical element 403 are connected.

[0071] Note that "a state in which antenna element 30d and helical element 403 are connected" refers to a state in which extension portion 301d is electrically connected to helical element 403 via screw 600 and metal member 409. In Fig. 8, extension portion 301d and metal member 409 are fastened together with screw 600, but any part other than screw 600, such as a conductive clip, may be used as long as extension portion 301d and metal member 409 can be electrically connected together.

[0072] Note that the above-mentioned modified example has been described using the portion connecting the antenna elements 30c, 30d for FM radio to the helical element 403, but the portion connecting the antenna element 30a for AM radio to the reactance element 406 may also have a similar configuration.

[0073] In addition, in this embodiment, the antenna element 30a is an element that corresponds to radio broadcast waves, specifically AM radio waves, and the antenna element 30b is an element that corresponds to radio broadcast waves, specifically FM radio waves, but this is not limiting. For example, an element that corresponds to waves in the frequency band used for DAB (Digital Audio Broadcasting) may also be used as the antenna element.

[0074] =====Summary===== According to the present specification, there is provided an antenna device having the following aspects.

[0075] (Aspect 1) Aspect 1 is an antenna device comprising an element portion that is attached to a vehicle structure and a unit that is detachable from the element portion.

[0076] According to the above-described embodiment, the unit 21 can be removed while the antenna device 10 is attached to the reinforcing member R1 of the vehicle. This improves convenience for workers when, for example, replacing electronic components included in the unit 21. The reinforcing member R1 corresponds to a "structure."

[0077] (Aspect 2) Aspect 2 is an antenna device that includes a connection portion, wherein the element portion has an antenna element and a holding portion that holds the antenna element, the unit has a substrate, a reactance element connected to the substrate, and a housing that houses the substrate and the reactance element, and the connection portion connects the antenna element and the reactance element.

[0078] According to the above-described aspect, when unit 21 is attached to element section 20, for example, antenna elements 30a and 30b are connected to helical element 403 and reactance element 406, respectively. Note that first holder 30 corresponds to the "holding section," and helical element 403 and reactance element 406 correspond to the "reactance element." Also, case 41 corresponds to the "housing," and at least a portion of metal members 404 and 405 corresponds to the "connection section." In this embodiment, clamping sections 501 and 512 correspond to the "connection section."

[0079] For example, in the embodiment shown in FIG. 7, the clamping portion 361 of the extension portion 301C corresponds to the "connecting portion", and in the embodiment shown in FIG. 8, the screw 600 corresponds to the "connecting portion".

[0080] (Aspect 3) Aspect 3 is an installation method for installing an antenna device on a vehicle, the antenna device comprising an element portion to be attached to a vehicle structure and a unit that is detachable from the element portion, the method comprising: attaching the element portion to the vehicle structure; connecting the antenna element of the element portion to the reactance element of the unit; and fixing the unit to the vehicle structure.

[0081] According to the above-described embodiment, the unit 21 can be attached and detached while the antenna device 10 is attached to the reinforcing member R1 of the vehicle. This improves the convenience for workers when, for example, replacing electronic components included in the unit 21.

[0082] The above-described embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit thereof, and the present invention includes equivalents thereof. [Explanation of symbols]

[0083] 10 Antenna device 20 Element section 21 units 30a, 30b, 30c, 30d Antenna elements 31 First Holder 41 cases 400 boards 403 Helical element (coil) 406 Reactance Element 404,405 Metallic parts 361,501,512 Clamping part 600 screws

Claims

1. an element portion attached to a vehicle structure; a unit detachable from the element part; An antenna device comprising:

2. Further comprising a connection portion, the element portion has an antenna element and a holding portion that holds the antenna element, the unit includes a substrate, a reactance element connected to the substrate, and a housing that houses the substrate and the reactance element; the connecting portion connects the antenna element and the reactance element; The antenna device according to claim 1 .

3. 1. A mounting method for mounting an antenna device to a vehicle, the antenna device including an element portion to be mounted to a vehicle structure and a unit detachable from the element portion, the method comprising: Attaching the element portion to a structure of the vehicle; The antenna element of the element section is connected to the reactance element of the unit, fastening the unit to a structure of the vehicle; How to install an antenna device.

Images