ANTENNA DEVICE

Abstract

SUMMARY: An antenna device comprises an antenna element, which includes a conductor, at least part of which comprises sections spaced apart from each other by a gap, and a holder that holds the antenna element, and the holder has a rib that is inserted into the gap.

Description

TECHNICAL AREA

[0001] The present invention relates to an antenna device. STATE OF THE ART

[0002] In recent years, various antennas have been developed as vehicle-to-everything (V2X) antennas. A collinear antenna can be used as a V2X antenna. Patent document 1 discloses an example of a collinear antenna. ASSOCIATED DOCUMENT PATENT DOCUMENT

[0003] Patent document 1: Japanese unexamined patent publication no. 2005-175557 SUMMARY OF THE INVENTIONAL PROBLEM

[0004] An antenna element, used in some antennas such as a collinear antenna, can comprise a conductor, at least part of which includes sections spaced apart by a gap. The antenna element is held by a holder, such as a resin holder. To suppress variations in the antenna's performance, it is necessary to ensure a specific gap dimension between the at least portions of the conductor. However, in a case where the antenna element is simply held by the holder, ensuring the correct gap dimension between the at least portions of the conductor can be challenging.

[0005] An example of one purpose of the present invention is to suppress a variation in the performance of an antenna comprising a conductor, at least part of which comprises sections spaced apart from one another by a gap. Other purposes of the present invention will become apparent from the description of this specification. SOLUTION TO THE PROBLEM

[0006] One aspect of the present invention is an antenna device comprising an antenna element comprising a conductor, at least part of which comprises sections spaced apart from one another by a gap, and a holder holding the antenna element, the holder having a rib inserted into the gap.

[0007] According to the aspect of the present invention, a variation in the performance of an antenna comprising a conductor, at least part of which comprises sections spaced apart from each other by a gap, can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS [ Fig. 1] Exploded perspective view from above of an antenna device according to one embodiment. [ Fig. 2] Exploded perspective view from above of a V2X antenna according to the embodiment. [ Fig. 3] Perspective view from above showing a V2X element held by a V2X holder according to the embodiment. [ Fig. 4] Exploded perspective view from above of a GNSS antenna according to the embodiment. [ Fig. 5] Exploded perspective view from below of an upper GNSS parasitic element, a lower GNSS parasitic element and a GNSS holder according to the embodiment. [ Fig. 6] Top view of the GNSS antenna according to the embodiment. [ Fig. 7] Exploded perspective view from above of an SXM antenna according to the embodiment. [ Fig. 8] Exploded perspective view from above of an AM / FM broadcast antenna according to the embodiment. DESCRIPTION OF EXECUTION FORMS

[0008] An embodiment of the present invention is described below with reference to the drawings. In all drawings, the same components are designated by the same reference numerals, and a detailed description thereof is not repeated.

[0009] In this specification, terms such as "essentially," "approximately," and "about," when modifying a state such as the shape, position, or numerical value of an element, mean a range, as understood by those skilled in the art, within which the intended purpose can be achieved by that state. For example, the term "essentially parallel" can, depending on the context, encompass not only a completely parallel state but also a state in which any deviation from perfect parallelism lies within a predetermined angular range. Similarly, the term "essentially perpendicular" can, depending on the context, encompass not only a completely perpendicular state but also a state in which any deviation from perfect perpendicularism lies within a predetermined angular range.

[0010] To describe directions, an X-direction, a Y-direction, and a Z-direction are defined. The Z-direction is a direction parallel to a vertical direction. The X-direction is one of the horizontal directions perpendicular to the Z-direction. The Y-direction is one of the horizontal directions perpendicular to both the Z-direction and the X-direction. In this embodiment, the X-direction is a front-back direction, the Y-direction is a left-right direction, and the Z-direction is an up-down direction. In each of the drawings of this embodiment, the directions indicated by the arrows of the X-axis, Y-axis, and Z-axis are, respectively, a front direction, a left direction, and an up direction. A white circle with a black dot, which is in Fig. 6, which indicates the Z-axis, shows that an arrow on an axis indicated by the white circle points to the front of the paper plane.

[0011] In the following, a plane perpendicular to the X direction will be referred to as the YZ plane, a plane perpendicular to the Y direction as the ZX plane, and a plane perpendicular to the Z direction as the XY plane, as needed.

[0012] Fig. Figure 1 is an exploded perspective view from above of an antenna device 10 according to an embodiment.

[0013] The antenna device 10 according to the embodiment is mounted on a surface side of the roof of a vehicle such as an automobile. However, the antenna device 10 can be mounted on a side other than the surface side of the vehicle roof, and the application of the antenna device 10 is not limited to vehicles. Unless otherwise specified, the antenna device 10 in the embodiment is described below as being mounted on the surface side of the vehicle roof.

[0014] As in Fig. As shown in Figure 1, the antenna device 10 according to the embodiment comprises a Vehicle-to-Everything (V2X) antenna 200. The antenna device 10 according to the embodiment further comprises an antenna base 110, a mounting element 120, a gasket 130, an outer housing 140, a pad 150, seven housing mounting screws 160, a pre-locking holder 170, a Global Navigation Satellite System (GNSS) antenna 300, a Sirius XM (SXM) antenna 400, and an AM / FM broadcast antenna 500. Fig. Figure 1 shows the outer casing 140 with the left half of the outer casing 140 removed.

[0015] The antenna base 110 has a substantially plate-like shape extending in the XY plane. Hereinafter, unless otherwise specified, the substantially plate-like shape can mean, for example, that the plate has a smooth surface or that the plate has an uneven surface. A longitudinal and a transverse direction of the antenna base 110 are substantially parallel to the X direction and the Y direction, respectively. In this embodiment, the antenna base 110 is a metal base. However, the antenna base 110 can be a resin base or a combination of a resin base and a metal base. Additionally, instead of the antenna base 110, a metal base and a metal plate, or a resin base and a metal plate, or a metal base, a resin base, and a metal plate can be provided.In this case, the metal base and the metal plate can be the same type of metal or different types of metal.

[0016] The fastening element 120 secures a conductive roof (not shown) of the vehicle, on which the antenna device 10 is mounted, to the antenna base 110 and electrically connects the roof to the antenna base 110. The fastening element 120 comprises a washer 122 and a screw 124. The washer 122 comprises two arms 122a. Extending from the Z-direction, the two arms 122a are arranged on both sides of the screw 124 in the Y-direction. When the antenna device 10 is mounted on the surface side of the roof, at least a portion of a conductive projection 112, provided on a bottom side of the antenna base 110, penetrates a fastening entry hole provided in the roof in the Z-direction. The screw 124 penetrates the washer 122 in the Z direction and is inserted into a screw hole provided on the underside of the conductive projection 112.The screw 124 and the conductive projection 112 are tightened together, causing each arm 122a to bend in the Z-direction by compression, and a tip of a claw provided on each arm 122a comes into contact with the underside of the roof. Therefore, the antenna base 110 and the roof can be fastened together. Furthermore, even if the underside of the roof is covered with a coating material, the coating material can be pierced by the claws of the arms 122a. Therefore, when the antenna base 110 and the roof are fastened together by the fastener 120, the antenna base 110 and the roof are electrically connected to each other via the washer 122 and the screw 124.

[0017] The seal 130 is located between the underside of the antenna base 110 and the top of the vehicle's roof (not shown). The seal 130 is made of an elastic material such as foamed urethane, an elastomer, or rubber. Extending from the Z-direction, the seal 130 surrounds the roof's mounting entry hole. With the antenna base 110 and the roof fastened together by the fastener 120, the seal 130 is compressed in the Z-direction by the underside of the antenna base 110 and the top of the roof. Therefore, the seal 130 prevents water from entering the roof's mounting entry hole.

[0018] The outer housing 140 and the antenna base 110 are fastened to each other by the seven housing mounting screws 160 when the padding 150 surrounds a circumferential edge portion of the antenna base 110 around the Z-direction and the outer housing 140 covers a space above the antenna base 110. However, the fastening element for attaching the outer housing 140 and the antenna base 110 to each other is not limited to a single fastening element such as the housing mounting screw 160. The number of housing mounting screws 160 is not limited to seven and can be one or a plurality of screws other than seven. The padding 150, for example, is made of a soft material. The seven housing mounting screws 160 penetrate the circumferential edge portion of the antenna base 110 around the Z-direction and are inserted into a circumferential edge portion of the outer housing 140 around the Z-direction.When the antenna base 110 and the outer housing 140 are joined together, at least a portion of the padding 150 is wedged between the circumferential edge of the antenna base 110 around the Z-direction and the circumferential edge of the outer housing 140 around the Z-direction. Therefore, the padding 150 can prevent moisture from entering a gap between the circumferential edge of the antenna base 110 around the Z-direction and the circumferential edge of the outer housing 140 around the Z-direction. Additionally, the outer housing 140 and the antenna base 110 can be joined together by welding, gluing, snap-fitting, or the like, instead of a fastener such as the housing mounting screw 160, or they can be joined together by a combination thereof, as long as at least a portion of the padding 150 is wedged between them.

[0019] When the antenna base 110 and the outer housing 140 are attached to each other, they define a housing space that accommodates the pre-locking bracket 170, the V2X antenna 200, the GNSS antenna 300, the SXM antenna 400, and the AM / FM broadcast antenna 500. Therefore, the outer housing 140 is a radome for the V2X antenna 200, the GNSS antenna 300, the SXM antenna 400, and the AM / FM broadcast antenna 500. The outer housing 140 is made, for example, of a radio wave-transmitting synthetic resin. The height of the outer housing 140 in the Z-direction increases towards its rear end. The width of the outer casing 140 in the Y direction decreases towards an upper end of the outer casing 140.Therefore, the dimensions of the antenna device 10 can be reduced compared to a case in which the height of the outer housing 140 in the Z direction is constant regardless of a position in the X direction, or the width of the outer housing 140 in the Y direction is constant regardless of a position in the Z direction.

[0020] The pre-locking holder 170 is, for example, an insulator such as a resin. The pre-locking holder 170 comprises a holder base 172, a front projection 174, and a rear projection 176. The holder base 172 has a substantially plate-like shape extending in the XY plane. The front projection 174 and the rear projection 176 are provided on a bottom surface of the holder base 172. When the holder base 172 is located on the surface side of the antenna base 110, the front projection 174 and the rear projection 176 each penetrate a front through-hole 114 and a rear through-hole 116 provided in the antenna base 110, respectively. A cable through-hole 178 is provided in the pre-locking holder 170. The cable passage hole 178 penetrates a portion of the holder base 172, overlapping the rear projection 176 in the Z direction, and the rear projection 176 in the Z direction.

[0021] The V2X antenna 200 is arranged on a surface side of a rear portion of the antenna base 110 in the X direction. The GNSS antenna 300 is arranged on a surface side of a substantially central portion of the antenna base 110 in the X direction. The SXM antenna 400 is arranged on a surface side of a front portion of the antenna base 110 in the X direction. The AM / FM broadcast antenna 500 is arranged on the surface side of the antenna base 110 between the V2X antenna 200 and the GNSS antenna 300. Details of the V2X antenna 200, the GNSS antenna 300, the SXM antenna 400, and the AM / FM broadcast antenna 500 are described with reference to drawings described later.

[0022] Fig. Figure 2 is an exploded perspective view from above of a V2X antenna 200 according to the embodiment. Fig. Figure 3 is a perspective view from above showing a V2X element 230 held by a V2X holder 240 according to the embodiment.

[0023] With reference to Fig. 2 and Fig. 3 and as required with reference to Fig. 1 describes the V2X antenna 200.

[0024] As in Fig. 2 and Fig. As shown in Figure 3, the V2X antenna 200 comprises a V2X substrate 210, four V2X substrate mounting screws 220, a V2X element 230, a V2X holder 240, a V2X holder mounting screw 250 and a V2X cable 260.

[0025] The V2X substrate 210 is a printed circuit board (for example, a PCB). As in Fig. As shown in Figure 2, the V2X substrate 210 has, from the Z-direction, a front edge substantially parallel to the Y-direction, a rear edge substantially parallel to the Y-direction, and substantially symmetrical left and right edges that are partially drawn towards a center of the V2X substrate 210 in the Y-direction. The length of the rear edge of the V2X substrate 210 in the Y-direction is shorter than the length of the front edge of the V2X substrate 210 in the Y-direction. A V2X front hole 212 is provided in a central part of the front part of the V2X substrate 210 in the Y-direction. A V2X rear hole 214 is provided in a central part of the rear part of the V2X substrate 210 in the Y-direction. A large-diameter V2X hole 216 is provided in a portion of the V2X substrate 210 between the V2X front hole 212 and the V2X rear hole 214. A V2X notch 218 is provided in a substantially central portion of the rear edge of the V2X substrate 210 in the Y direction.However, the shape, material and the like of the V2X substrate 210 are not related to the one in . Fig. The two examples shown are limited.

[0026] As in Fig. 2 and Fig. As shown in Figure 1, the V2X substrate 210 and a rear portion of the antenna base 110 are fastened together in the X direction by four V2X substrate mounting screws 220. However, the fastening element for securing the V2X substrate 210 and the antenna base 110 together is not limited to a single fastening element such as the V2X substrate mounting screw 220. Each V2X substrate mounting screw 220 is conductive. Therefore, a grounding portion of the V2X substrate 210 and the antenna base 110 are electrically connected to each other via the four V2X substrate mounting screws 220. As shown in Figure 1, the V2X substrate 210 and the antenna base 110 are electrically connected via the four V2X substrate mounting screws 220. Fig. As shown in Figure 2, two of the four V2X substrate mounting screws 220 penetrate both side panels of the front part of the V2X substrate 210 in the Y direction and are inserted into the antenna base 110. The other two of the four V2X substrate mounting screws 220 penetrate both side panels of the rear part of the V2X substrate 210 in the Y direction and are inserted into the antenna base 110. However, the number and arrangement of the V2X substrate mounting screws 220 are not shown in Figure 2. Fig. The two examples shown are limited.

[0027] The V2X element 230 is an antenna element of the V2X antenna 200. In this embodiment, the V2X element 230 is a collinear antenna element. The V2X element 230 is a linear conductor, such as a metal wire. The V2X element 230 comprises a lower linear conductor 232, an upper linear conductor 234, and a wound conductor 236. The upper linear conductor 234 comprises a first upper linear conductor section 234a and a second upper linear conductor section 234b.

[0028] The lower linear conductor 232 is essentially perpendicular to the V2X substrate 210. That is, the lower linear conductor 232 is essentially parallel to the Z-direction. A lower end portion of the lower linear conductor 232 and the rear portion of the V2X substrate 210 are electrically connected. As shown in Fig. As shown in Figure 2, when the V2X element 230 is held by the V2X holder 240 and is located on the surface side of the V2X substrate 210, the lower end portion of the lower linear conductor 232 penetrates the V2X back hole 214. The lower end portion of the lower linear conductor 232 and a circumferential portion of the V2X back hole 214 on the underside of the V2X substrate 210 are electrically connected, for example, by soldering.

[0029] The first upper linear conductor section 234a is inclined forward relative to the lower linear conductor 232. That is, the first upper linear conductor section 234a is inclined forward relative to the Z-direction. The antenna device 10 can be mounted on the surface side of the roof near a rear window. The top of the roof near the rear window can be inclined downwards towards the rear. Therefore, if the antenna device 10 is mounted on the surface side of the roof near the rear window and the first upper linear conductor section 234a is not inclined relative to the lower linear conductor 232, the radio wave radiated by the first upper linear conductor section 234a can easily propagate through the rear window. In a case where the radio wave radiated by the first upper linear conductor section 234a propagates through the rear window, the gain can decrease near an elevation angle of 0°.On the other hand, in this embodiment, even if the antenna device 10 is mounted on the surface side of the roof near the rear window, the radio wave radiated by the first upper linear conductor section 234a is less likely to propagate through the rear window compared to a condition in which the first upper linear conductor section 234a is not inclined relative to the lower linear conductor 232. However, the first upper linear conductor section 234a can be not inclined relative to the lower linear conductor 232. That is, the first upper linear conductor section 234a can be essentially parallel to the Z-direction. Additionally, by tilting the first upper linear conductor section 234a forward relative to the lower linear conductor 232, the height of the V2X element 230 in the Z-direction can be reduced, and the antenna device 10 can be designed to be low-profile.

[0030] The second upper linear conductor section 234b is bent forward relative to the upper end portion of the first upper linear conductor section 234a. The second upper linear conductor section 234b is essentially parallel to the X-direction. Therefore, the height of the V2X element 230 can be reduced in the Z-direction, and the antenna device 10 can be made lower compared to a case where the second upper linear conductor section 234b is not bent relative to the first upper linear conductor section 234a. However, a portion of the upper linear conductor 234 corresponding to the second upper linear conductor section 234b can be straight relative to the first upper linear conductor section 234a. Additionally, the second upper linear conductor section 234b can be bent backward relative to the upper end portion of the first upper linear conductor section 234a, or it can be bent to the left or to the right.

[0031] The wound conductor 236 is a winding part of the V2X element 230. Depending on its winding configuration, the wound conductor 236 can act as an inductance component of the V2X element 230. A central axis of the wound conductor 236 is essentially parallel to the Z-direction. The central axis of the wound conductor 236 passes through the center of a region enclosed by the wound conductor 236. The wound conductor 236 is wound around an imaginary axis that is parallel to its central axis. The wound conductor 236 comprises a wound lower end 236a and a wound upper end 236b. The wound lower end 236a and the wound upper end 236b are spaced apart from each other by a gap. The wound lower end part 236a and an upper end part of the lower linear conductor 232 are connected to each other.The wound upper end section 236b and a lower end section of the upper linear conductor 234 are connected to each other. The wound conductor 236 is arranged facing forward, opposite the upper end section of the lower linear conductor 232 and the lower end section of the upper linear conductor 234. From above, the wound conductor 236 is wound in a substantially ring-shaped form. Specifically, viewed from above, the wound conductor 236 is wound one turn in a counterclockwise direction from the wound lower end section 236a to the wound upper end section 236b. In this embodiment, a region enclosed by the wound conductor 236 is hollow in the Z-direction. However, the wound conductor 236 can also be wound around a fixed axis made of a dielectric or the like. The winding method and shape of the wound conductor 236 are not limited to the one described in [reference missing]. Fig. The two examples shown are limited.

[0032] The wound conductor 236 is designed to align the phase of the lower linear conductor 232 with the phase of the upper linear conductor 234. The lower linear conductor 232 and the upper linear conductor 234 are electrically connected in series via the wound conductor 236. An electrical length of the lower linear conductor 232 is essentially 1 / 2 a wavelength of an operating frequency of the V2X element 230. An electrical length encompassing the first upper linear conductor section 234a and the second upper linear conductor section 234b of the upper linear conductor 234 is essentially 1 / 2 the operating frequency of the V2X element 230. Therefore, the V2X element 230 can act as a collinear antenna.

[0033] As in Fig. As shown in Figure 3, the V2X holder 240 holds the V2X element 230. The V2X holder 240 is an insulator, such as a resin. The V2X holder 240 comprises a base plate 241, a top plate 242, a front column 243, a rear column 244, a lower web 245, a middle web 246, and an upper web 247. A lower guide groove 241a is provided on a left side face of a rear portion of the base plate 241. A lower front projection 241b is provided on the underside of a front portion of the base plate 241. A lower rear projection 241c is provided on the underside of a rear portion of the base plate 241. An upper guide groove 242a is provided on a left side face of a rear portion of the top plate 242. An upper hook 242b is provided above a top surface of the top plate 242. An upper positioning wall 242c is provided in front of the upper hook 242b on a top surface of the top plate 242.A rib 244a is provided on a front surface of the rear column 244. A lower guide groove 245a is provided on a left side surface of a rear portion of the lower web 245. A lower hook 245b is provided below a bottom surface of the lower web 245. A middle guide groove 246a is provided on a left side surface of a rear portion of the middle web 246.

[0034] The base plate 241 and the top plate 242 are opposite each other in the Z-direction. The front column 243 is located between a front part of the base plate 241 and a front part of the top plate 242. The front column 243 is located between the front part of the base plate 241 and the front part of the top plate 242, essentially parallel to the Z-direction. The rear column 244 is located between a rear part of the base plate 241 and a rear part of the top plate 242. The rear column 244 is located between the rear part of the base plate 241 and the rib 244a, essentially parallel to the Z-direction. The rear column 244 is inclined forward relative to the Z-direction between the rib 244a and the rear part of the top plate 242. The lower web 245, the middle web 246 and the upper web 247 are arranged sequentially from the base plate 241 to the top plate 242.The lower web 245, the middle web 246 and the upper web 247 connect a rear surface of the front column 243 and a front surface of the rear column 244.

[0035] The structure of the V2X holder 240 is not based on the one in Fig. 2 and Fig. The three examples shown are limited. For instance, the V2X holder 240 cannot include ribs such as the bottom rib 245, the middle rib 246, and the top rib 247. Alternatively, the number of ribs such as the bottom rib 245, the middle rib 246, and the top rib 247 can differ from three and can be one, two, four, or more.

[0036] As in Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, a lower part, a central part, and an upper part of the lower linear conductor 232 are inserted in the Z-direction into the lower guide groove 241a, the lower guide groove 245a, and the middle guide groove 246a, respectively. Similarly, as shown in Fig. Figure 3 shows that when the V2X element 230 is held by the V2X holder 240, an upper part of the upper linear conductor 234 is inserted into the upper guide groove 242a in the Z-direction. By inserting the V2X element 230 into the guide grooves, the V2X element 230 can be guided to a desired position of the V2X holder 240. However, the number and arrangement of the guide grooves are not limited to those shown in Figure 3. Fig. 2 and Fig. The three examples shown are limited. For example, the guide groove may not be included.

[0037] As in Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, the rib 244a is inserted into a gap between the wound lower end 236a and the wound upper end 236b (hereinafter referred to as "the gap"). The rib 244a can be pressed into the gap. When the rib 244a is inserted into the gap, the wound lower end 236a and the wound upper end 236b are spaced apart from the rib 244a on a lower and an upper side, respectively. The rib 244a is integrated with the rear column 244 and acts as an insulator, similar to a resin. If the rib 244a is not inserted into the gap, a dimension of the rib 244a in a direction perpendicular to the insertion direction of the rib 244a into the gap is equal to or greater than a dimension of the gap in the direction perpendicular to the insertion direction of the rib 244a into the gap.Therefore, in contrast to a case where the dimension of the rib 244a is smaller than the dimension of the gap, when the rib 244a is not inserted into the gap, the rib 244a can be reliably inserted into the gap, and movement of the V2X element 230 relative to the rib 244a, in particular movement of the V2X element 230 in the Z direction relative to the rib 244a, can be suppressed. Furthermore, rattling, deformation or the like of the wound conductor 236 can be suppressed compared to a case in which the dimension of the rib 244a is smaller than the dimension of the gap when the rib 244a is not inserted into the gap, and the occurrence of noise due to the contact of the wound conductor 236 with the V2X holder 240 can be suppressed even in a case in which the antenna device 10 vibrates due to a factor such as the vibration of the vehicle.However, if the rib 244a is not inserted into the gap, the dimension of the rib 244a can be smaller than the dimension of the gap.

[0038] In this embodiment, the wound conductor 236 and the rib 244a are designed such that the gap between the wound lower end 236a and the wound upper end 236b of the wound conductor 236 is a desired dimension when the rib 244a is inserted into the gap. Therefore, the gap dimension of the wound conductor 236 can be adjusted in a direction from the wound lower end 236a to the wound upper end 236b according to the dimension of the rib 244a. Thus, the desired gap dimension of the wound conductor 236 can be ensured by ensuring the correct dimension of the rib 244a. Therefore, in this embodiment, the variation in the performance of the V2X antenna 200 can be suppressed compared to a case in which the rib 244a is not inserted into the gap between the wound lower end part 236a and the wound upper end part 236b.Additionally, tolerance management of the dimension of rib 244a can generally be carried out more rigorously than tolerance management of the dimension of the gap of the wound conductor 236. Therefore, it is easier to carry out tolerance management of the dimension of the gap of the wound conductor 236 in a case where rib 244a is used, compared to a case where rib 244a is not used.

[0039] As in Fig. 2 and Fig. As shown in Figure 3, the rib 244a extends from the Z-direction in a direction that intersects the X-direction, from the center of a region enclosed by the wound conductor 236 to the gap between the wound lower end 236a and the wound upper end 236b. That is, the rib 244a extends from the Z-direction in a direction that intersects the X-direction. As described later, in this embodiment, the V2X element 230 is positioned on the left side of the V2X holder 240, and then the V2X element 230 is moved toward the V2X holder 240 to assemble the V2X element 230 and the V2X holder 240. Therefore, in a case where the rib 244a extends from the Z-direction in a direction that intersects the X-direction, the V2X element 230 can slide along the rib 244a when the rib 244a is inserted into the gap between the wound lower end part 236a and the wound upper end part 236b.Therefore, the V2X element 230 and the V2X holder 240 can be easily assembled compared to a case in which the V2X element 230 cannot slide along the rib 244a.

[0040] As in Fig. 2 and Fig. As shown in Figure 3, a left end portion of rib 244a projects to the left relative to a left end portion of the rear column 244. Therefore, compared to a case where the left end portion of rib 244a and the left end portion of the rear column 244 are aligned in the Y-direction, the left end portion of rib 244a can be easily inserted into the gap between the wound lower end portion 236a and the wound upper end portion 236b. However, the left end portion of rib 244a and the left end portion of the rear column 244 can also be aligned in the Y-direction. Alternatively, the left end portion of rib 244a can be positioned offset to the right relative to the left end portion of the rear column 244.

[0041] As in Fig. 2 and Fig. As shown in Figure 3, the wound lower end section 236a and the wound upper end section 236b are positioned offset from each other in a direction parallel to the Z-direction. Furthermore, the rib 244a is inclined obliquely relative to the XY-plane when viewed from the rear. Therefore, compared to a case in which the wound lower end section 236a and the wound upper end section 236b are positioned offset from each other in a direction perpendicular to the Z-direction, or a case in which the rib 244a is parallel to the XY-plane, the V2X element 230 can easily slide along the rib 244a when the rib 244a is inserted into the gap between the wound lower end section 236a and the wound upper end section 236b.

[0042] Specifically, as in Fig. Figure 3 shows rib 244a, viewed from behind, inclined obliquely downwards from the right side to the left side relative to the XY plane. As in Fig. As shown in Figure 3, the rib 244a, viewed from the rear, is positioned on an upper side opposite a near-field portion of the wound lower end 236a of the wound conductor 236 on a right side of the gap between the wound lower end 236a and the wound upper end 236b. Therefore, the wound conductor 236 and the rib 244a are less likely to interfere with each other on the right side of the gap compared to a case where the rib 244a is parallel to the XY plane. As shown in Fig. As shown in Figure 3, the rib 244a, viewed from the rear, is positioned on a lower side opposite a near-field portion of the wound upper end 236b of the wound conductor 236 on the left side of the gap between the wound lower end 236a and the wound upper end 236b. Therefore, the wound conductor 236 and the rib 244a are less likely to interfere with each other on the left side of the gap compared to a case where the rib 244a is parallel to the XY plane. Therefore, the wound conductor 236 can slide easily along the rib 244a compared to a state where the wound conductor 236 and the rib 244a are likely to interfere with each other, such as a state where the rib 244a is parallel to the XY plane. However, the rib 244a can be parallel to the XY plane.

[0043] Viewed from behind, the rib 244a can be inclined obliquely upwards from the right side to the left side. In a case where the rib 244a is inclined obliquely upwards from the right side to the left side when viewed from behind, the wound conductor 236 can, viewed from above, run from the wound lower end 236a to the wound upper end 236b in a clockwise direction, which corresponds to the direction shown in the diagram. Fig. 2 and Fig. The coiled conductor 236 can be wound around one turn in the opposite direction to that shown in Figure 3, in a counterclockwise direction. That is, from below, the coiled conductor 236 can be wound around one turn from the coiled lower end 236a to the coiled upper end 236b in a counterclockwise direction. Even in a case where, viewed from behind, the rib 244a is inclined obliquely upwards from the right side to the left side, and the coiled conductor 236, viewed from below, is wound around one turn from the coiled lower end 236a to the coiled upper end 236b in a counterclockwise direction, the coiled conductor 236 can slide easily along the rib 244a for the same reason described above, compared to a case where the rib 244a is parallel to the XY plane.

[0044] The arrangement of the wound lower end part 236a and the wound upper end part 236b is not based on the one shown in Fig. 2 and Fig. The 3 examples shown are limited. The wound lower end part 236a and the wound upper end part 236b can be positioned offset from each other in a direction inclined to the Z-direction by a predetermined angle of more than 0° and less than 90°. Even when the wound lower end part 236a and the wound upper end part 236b are positioned offset from each other in a direction inclined to the Z-direction, the V2X element 230 can easily slide along the rib 244a, with the rib 244a being inserted into the gap between the wound lower end part 236a and the wound upper end part 236b, compared to a case in which the wound lower end part 236a and the wound upper end part 236b are positioned offset from each other in a direction perpendicular to the Z-direction.

[0045] In the Fig. 2 and Fig. In the three examples shown, the dimension of rib 244a in the direction from the wound lower end 236a to the wound upper end 236b is constant, regardless of its position in the Y-direction. However, when viewed from the rear, the dimension of rib 244a can increase from left to right. In this case, where the dimension of rib 244a increases from left to right when viewed from the rear, the dimension of the gap between the wound lower end 236a and the wound upper end 236b can be gradually increased as the wound conductor 236 slides along rib 244a from left to right. Therefore, the wound conductor 236 can be easily mounted on rib 244a compared to a case where the dimension of rib 244a is constant, regardless of its position in the Y-direction.

[0046] As in Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, the lower hook 245b engages the lower linear conductor 232. The lower hook 245b has a snap-fit ​​connection structure. Specifically, the lower hook 245b comprises a lower elastic web 245b1 and a lower projection 245b2. When the V2X element 230 is held by the V2X holder 240, the lower elastic web 245b1 is essentially parallel to the Y-direction. The lower elastic web 245b1 is bendable forward by an external force received from the lower linear conductor 232. The lower projection 245b2 is located on a rear face of a left end portion of the lower elastic web 245b1. The lower elastic web 245b1 and the lower projection 245b2 each cover a front part and a left part of the lower linear conductor 232. Therefore, rattling of the lower linear conductor 232 forwards and backwards is prevented.The rattling of the lower linear conductor 232 to the left is limited by the lower elastic web 245b1 and the lower projection 245b2, respectively. Therefore, the occurrence of noise due to contact of the lower linear conductor 232 with the V2X holder 240 can be suppressed, even in a case where the antenna device 10 vibrates due to a factor such as vehicle vibration, compared to a condition where the lower hook 245b is not present. Furthermore, the release of the V2X element 230 from the V2X holder 240 can be suppressed compared to a condition where the lower hook 245b is not present.

[0047] As in Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, the upper hook 242b engages the second upper linear conductor section 234b. The upper hook 242b has a snap-fit ​​connection structure. Specifically, the upper hook 242b comprises an upper elastic web 242b1 and an upper projection 242b2. When the V2X element 230 is held by the V2X holder 240, the upper elastic web 242b1 is substantially parallel to the Y-direction. The upper elastic web 242b1 is bendable upward by an external force received from the second upper linear conductor section 234b. The upper projection 242b2 is located on the underside of a left end portion of the upper elastic web 242b1. The upper elastic web 242b1 and the upper projection 242b2 each cover an upper part and a left part of the second upper linear conductor section 234b. Therefore, rattling of the first upper linear conductor section 234a upwards or downwards can be prevented.Rattling of the first upper linear conductor section 234a to the left is limited by the upper elastic web 242b1 and the upper projection 242b2, respectively. Therefore, the occurrence of noise due to contact of the second upper linear conductor section 234b with the V2X holder 240 can be suppressed even in a case where the antenna device 10 vibrates due to a factor such as vehicle vibration, compared to a condition where the upper hook 242b is not provided.

[0048] The hook, like the lower hook 245b and the upper hook 242b, is a locking structure that locks the V2X element 230. The number and arrangement of the locking structures are not specified in Fig. 2 and Fig. The 3 examples shown are limited. For example, the locking structure may not be included.

[0049] As in Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, a front end portion of the second upper linear conductor section 234b abuts a left side face of the upper positioning wall 242c. This abutment of the front end portion of the second upper linear conductor section 234b against the left side face of the upper positioning wall 242c suppresses movement of the second upper linear conductor section 234b in the right direction, and allows the second upper linear conductor section 234b to be positioned in the Y direction.

[0050] As in Fig. 2 and Fig. As shown in Figure 3, when the V2X element 230 is held by the V2X holder 240, the V2X element 230 and the V2X holder 240 are positioned on one surface side of the V2X substrate 210. When the V2X element 230 and the V2X holder 240 are positioned on the surface side of the V2X substrate 210, the lower front projection 241b is inserted into the V2X front hole 212, and the lower end portion of the lower linear conductor 232 penetrates the V2X rear hole 214. By inserting the lower front projection 241b into the V2X front hole 212, the V2X holder 240 can be aligned with the V2X substrate 210.

[0051] The V2X holder 240 and the V2X substrate 210 are fastened together by a V2X holder mounting screw 250. However, the fastening element for attaching the V2X holder 240 and the V2X substrate 210 together is not limited to a fastening element such as the V2X holder mounting screw 250. The V2X holder mounting screw 250 penetrates the V2X large-diameter hole 216 and is inserted into a front portion of the base plate 241 and a lower portion of the front column 243. The V2X holder mounting screw 250 is conductive. Therefore, the V2X holder mounting screw 250 and the antenna base 110 are electrically connected to each other via the grounding portion of the V2X substrate 210 and the four V2X substrate mounting screws 220. Therefore, the V2X mounting screw 250 is electrically grounded. Therefore, the V2X mounting screw 250 can act as a parasitic element for adjusting the directional characteristic of the V2X element 230.Specifically, the V2X mounting screw 250 can act as a reflector. In a case where the V2X mounting screw 250 acts as a reflector, the directional characteristic of the rear of the V2X antenna 200 can be enhanced.

[0052] The V2X holder mounting screw 250 is inserted into the front part of the base plate 241 and the lower part of the front column 243 by passing through the V2X large-diameter hole 216, with the lower rear projection 241c engaging in the V2X notch 218. Therefore, rotation of the V2X holder 240 relative to the V2X substrate 210 during tightening of the V2X holder mounting screw 250 is suppressed by the V2X notch 218 and the lower rear projection 241c. Suppressing the rotation of the V2X holder 240 prevents the lower end portion of the lower linear conductor 232 from abutting an inner wall of the V2X rear hole 214.Therefore, stress on the lower end portion of the lower linear conductor 232 due to the abutment of the lower end portion of the lower linear conductor 232 against the inner wall of the V2X back hole 214 can be suppressed compared to a case in which the V2X notch 218 and the lower back projection 241c are not provided. The lower back projection 241c can be inserted into a hole provided in the V2X substrate 210 instead of a notch such as the V2X notch 218. In a case in which the lower back projection 241c is inserted into the V2X notch 218, the size of the V2X substrate 210 can be reduced compared to a case in which the lower back projection 241c is inserted into the hole provided in the V2X substrate 210.

[0053] As in Fig. As shown in Figure 2, one end of the V2X cable 260 and the front part of the V2X substrate 210 are electrically connected, for example, by soldering. Fitting the outer conductor of the V2X cable 260, or the like, into the notch of the front part of the V2X substrate 210 improves the workability of soldering the V2X cable 260 and the V2X substrate 210. As shown in Fig. 1 and Fig. As shown in Figure 2, the V2X cable 260 is guided forward from the front part of the V2X substrate 210 to an upper end opening of the cable passage hole 178 and from the upper end opening of the cable passage hole 178 downward through the cable passage hole 178 to the rear projection 176. A cable hook 172a is provided in the holder base 172 between the front part of the V2X substrate 210 and the upper end opening of the cable passage hole 178. The V2X cable 260 is locked in place by the cable hook 172a between the front part of the V2X substrate 210 and the upper end of the cable passage hole 178.

[0054] Next, an example of a procedure for assembling the V2X element 230 and the V2X holder 240 is described.

[0055] First, the V2X element 230 is positioned on the left side of the V2X holder 240 when viewed from the rear. Next, the V2X element 230 is moved towards the V2X holder 240, and a left end portion of the rib 244a is inserted into the gap between the wound lower end portion 236a and the wound upper end portion 236b. The V2X element 230 is then pushed towards the V2X holder 240. By pushing the V2X element 230 towards the V2X holder 240, the V2X element 230 slides along the rib 244a, with the rib 244a being inserted into the gap between the wound lower end portion 236a and the wound upper end portion 236b.

[0056] By pressing the V2X element 230 towards the V2X holder 240, the V2X holder 240 is locked by the lower hook 245b and the upper hook 242b as follows.

[0057] By pressing the V2X element 230 towards the V2X holder 240, the lower linear conductor 232 comes into contact with a left side face of the lower projection 245b2. By further pressing the V2X element 230 towards the V2X holder 240, the lower linear conductor 232 pushes the lower projection 245b2 forward, and the lower elastic web 245b1 is bent forward. The lower elastic web 245b1 is bent forward until the lower linear conductor 232 pushes the lower projection 245b2 forward. The lower linear conductor 232 pushes the lower projection 245b2 forward, passes the lower projection 245b2, and is inserted into the lower guide groove 241a, the lower guide groove 245a, and the middle guide groove 246a. After the lower linear conductor 232 has passed the lower projection 245b2, the lower elastic web 245b1 receives no external force from the lower linear conductor 232, and the bending of the lower elastic web 245b1 is canceled.When the bending of the lower elastic web 245b1 is removed, the lower elastic web 245b1 is essentially parallel to the Y-direction. Therefore, the lower hook 245b can lock the lower linear conductor 232.

[0058] By pressing the V2X element 230 towards the V2X holder 240, the second upper linear conductor section 234b comes into contact with a left side face of the upper projection 242b2. By further pressing the V2X element 230 towards the V2X holder 240, the second upper linear conductor section 234b pushes the upper projection 242b2 upwards, and the upper elastic web 242b1 is bent upwards. The upper elastic web 242b1 is bent upwards until the second upper linear conductor section 234b pushes the upper projection 242b2 upwards. The second upper linear conductor section 234b pushes the upper projection 242b2 upwards and passes over the upper projection 242b2. After the second upper linear conductor section 234b has passed the upper projection 242b2, the upper elastic web 242b1 receives no external force from the second upper linear conductor section 234b, and the bending of the upper elastic web 242b1 is canceled.When the bending of the upper elastic web 242b1 is removed, the upper elastic web 242b1 is essentially parallel to the Y-direction. Therefore, the upper hook 242b can lock the second upper linear conductor section 234b.

[0059] As described above, the V2X element 230 and the V2X holder 240 are assembled. For example, a worker can assemble the V2X element 230 and the V2X holder 240 by moving their right hand while their left hand is fixed, holding the V2X holder 240 with their left hand and the V2X element 230 with their right hand, with the front part of the V2X element 230 and the left part of the V2X holder 240 facing the worker's face.

[0060] The structure and assembly method of the V2X antenna 200 are not limited to the examples described in the embodiment.

[0061] For example, the wound conductor 236 can be wound several times in a spiral shape. In a case where the wound conductor 236 is wound several times, it comprises a plurality of winding sections arranged in a direction parallel to the central axis of the wound conductor 236. In such a case, a rib can be inserted into a gap between adjacent winding sections of the wound conductor 236. By inserting the rib into the gap between the adjacent winding sections of the wound conductor 236, the dimension of the gap between the adjacent winding sections of the wound conductor 236 can be adjusted by the dimension of the rib.

[0062] The V2X element 230 can be assembled on the V2X holder 240 from the rear, on the right side opposite the V2X holder 240. In a case where the V2X element 230 is assembled on the V2X holder 240 from the right side opposite the V2X holder 240, a groove corresponding to the guide grooves such as the lower guide groove 241a, the lower guide groove 245a, the middle guide groove 246a and the upper guide groove 242a is open to the right when viewed from the rear.

[0063] The winding portion to which a rib corresponding to rib 244a can be applied is not limited to the wound conductor 236 according to the embodiment or the inductance component of the antenna element of the collinear antenna. The rib can also be applied, for example, to a helical element that has a conductor wound in a spiral shape, such as a coil.

[0064] Fig. Figure 4 is an exploded perspective view from above of a GNSS antenna 300 according to the embodiment. Fig. Figure 5 is an exploded perspective view from below of an upper GNSS parasitic element 340, a lower GNSS parasitic element 350 and a GNSS holder 360 according to the embodiment. Fig. Figure 6 is a top view of the GNSS antenna 300 according to the embodiment.

[0065] With reference to Fig. 4, Fig. 5 and Fig. 6 and as required with reference to Fig. Section 1 describes the GNSS antenna 300.

[0066] As in Fig. As shown in Figure 4, the GNSS antenna 300 comprises a GNSS patch antenna 330, the upper GNSS parasitic element 340, the lower GNSS parasitic element 350, and the GNSS holder 360. The GNSS antenna 300 further comprises a GNSS substrate 310, five GNSS substrate mounting screws 320, a pair of GNSS holder mounting screws 370, and two GNSS cables 380.

[0067] The GNSS substrate 310, for example, is a PCB. In the Fig. In the example shown in Figure 4, the GNSS substrate 310 has a substantially rectangular shape when viewed from the Z-direction, with a pair of long sides essentially parallel to the X-direction and a pair of short sides essentially parallel to the Y-direction. However, the shape, material, and other characteristics of the GNSS substrate 310 are not related to the example shown in Figure 4. Fig. The 4 examples shown are limited.

[0068] As in Fig. 1 and Fig. As shown in Figure 4, the GNSS substrate 310 and a substantially central part of the antenna base 110 are fastened together in the X direction by five GNSS substrate mounting screws 320. However, the fastening element for attaching the GNSS substrate 310 and the antenna base 110 together is not limited to a single fastening element such as the GNSS substrate mounting screw 320. The number of GNSS substrate mounting screws 320 is not limited to five and can differ from five. Each GNSS substrate mounting screw 320 is conductive. Therefore, a grounding portion of the GNSS substrate 310 and the antenna base 110 are electrically connected to each other via the five GNSS substrate mounting screws 320. As shown in Figure 4, the GNSS substrate 310 and the antenna base 110 are electrically connected to each other via the five GNSS substrate mounting screws 320. Fig. As shown in Figure 4, three of the five GNSS substrate mounting screws 320 penetrate both side panels and a central part of the rear part of the GNSS substrate 310 in the Y direction and are inserted into the antenna base 110. The other two of the five GNSS substrate mounting screws 320 penetrate both side panels of the front part of the GNSS substrate 310 in the Y direction and are inserted into the antenna base 110. However, the number and arrangement of the GNSS substrate mounting screws 320 are not shown in Figure 4. Fig. The 4 examples shown are limited.

[0069] The GNSS patch antenna 330 is an antenna element of the GNSS antenna 300. The GNSS patch antenna 330 is mounted on a surface side of the GNSS substrate 310 by means of a GNSS bottom double-sided adhesive tape 332. A bottom side of the GNSS patch antenna 330 and a top side of the GNSS substrate 310 are connected to each other by the GNSS bottom double-sided adhesive tape 332. However, the adhesive material for attaching the GNSS patch antenna 330 and the GNSS substrate 310 to each other is not limited to a double-sided adhesive tape like the GNSS bottom double-sided adhesive tape 332. The adhesive material could, for example, be a glue. In the Fig. In the example shown in Figure 4, the GNSS patch antenna 330 has a substantially square shape when viewed from the Z-direction. The GNSS lower double-sided adhesive tape 332 has a substantially circular plate shape when viewed from the Z-direction. However, the shapes of the GNSS patch antenna 330 and the GNSS lower double-sided adhesive tape 332 are not based on the example shown in Figure 4. Fig. The 4 examples shown are limited.

[0070] The GNSS holder 360 holds the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 in a position spaced upwards from the top of the GNSS patch antenna 330. The GNSS holder 360 is an insulator made of resin. As shown in Fig. 4 and Fig. As shown in Figure 5, the GNSS holder 360 comprises a mounting body 362 and a pair of support bodies 364.

[0071] As in Fig. 4 and Fig. As shown in Figure 5, the fastening body 362 has a substantially square frame shape when viewed from the Z-direction. The fastening body 362 comprises a front fastening body section 362a, a rear fastening body section 362b, a left fastening body section 362c, and a right fastening body section 362d. The front fastening body section 362a is substantially parallel to the Y-direction between an outer edge and an inner edge of the fastening body 362 on a front side. The rear fastening body section 362b is substantially parallel to the Y-direction between an outer edge and an inner edge of the fastening body 362 on a rear side. The front fastening body section 362a and the rear fastening body section 362b are opposite each other in the X-direction.The left fastening body section 362c is substantially parallel to the X-direction between an outer edge and an inner edge of the fastening body 362 on a left side. The right fastening body section 362d is substantially parallel to the X-direction between an outer edge and an inner edge of the fastening body 362 on a right side. The left fastening body section 362c and the right fastening body section 362d are opposite each other in the Y-direction.

[0072] As in Fig. As shown in Figure 4, at least a portion of the top surface of the GNSS patch antenna 330 is exposed upwards from the Z-direction through a cavity enclosed by an inner edge of the mounting body 362. However, the mounting body 362 can cover the entire top surface of the GNSS patch antenna 330. For example, the mounting body 362 can have a plate shape from the Z-direction that covers the entire top surface of the GNSS patch antenna 330.

[0073] The pair of support bodies 364 is provided in the left mounting body section 362c and the right mounting body section 362d. Hereinafter, the support body 364 provided in the left mounting body section 362c will be referred to as the left support body 364, and the support body 364 provided in the right mounting body section 362d will be referred to as the right support body 364, as needed. Each support body 364 comprises a support column 364a and a support base 364b. Hereinafter, the support column 364a and the support base 364b of the left support body 364 will be referred to as the left support column 364a and left support base 364b, respectively, as needed, and the support column 364a and the support base 364b of the right support body 364 will be referred to as the right support column 364a and right support base 364b, respectively, as needed.Hereinafter, the left support column 364a and the right support column 364a are referred to collectively as a pair of support columns 364a as needed, and the left support base 364b and the right support base 364b are referred to collectively as a pair of support bases 364b as needed.

[0074] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, the left support column 364a extends in the Z direction between the left mounting body section 362c and a portion of the antenna base 110 located on the left side opposite the GNSS substrate 310. An upper end portion of the left support column 364a and a left side surface portion of the left mounting body section 362c are connected to each other. The left support base 364b extends from a lower end portion of the left support column 364a to the left side.

[0075] As in Fig. As shown in Figure 6, the left support base 364b and the portion of the antenna base 110 located on the left side opposite the GNSS substrate 310 are fastened together by a GNSS holder mounting screw 370, which is also located on the left side opposite the GNSS substrate 310. However, the fastening element for securing the left support base 364b and the antenna base 110 together is not limited to a fastening element such as the GNSS holder mounting screw 370. Hereinafter, the GNSS holder mounting screw 370 located on the left side opposite the GNSS substrate 310 will be referred to as the left GNSS holder mounting screw 370, as needed. The left GNSS holder mounting screw 370 penetrates the left support base 364b and is inserted into the part of the antenna base 110 that is located on the left side opposite the GNSS substrate 310.From the Z-direction, the left GNSS holder mounting screw 370 is positioned offset to the left relative to an outer edge on the left side of the upper GNSS parasitic element 340 and an outer edge on the left side of the lower GNSS parasitic element 350. This prevents the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 from interfering with the tightening of the left GNSS holder mounting screw 370.

[0076] As in Fig. 4, Fig. 5 and Fig. As shown in Figure 6, the right support column 364a extends in the Z direction between the right mounting body section 362d and a portion of the antenna base 110 located on the right side opposite the GNSS substrate 310. An upper end portion of the right support column 364a and a right side surface portion of the right mounting body section 362d are connected to each other. The right support base 364b extends from a lower end portion of the right support column 364a to the right side.

[0077] As in Fig. As shown in Figure 6, the right support base 364b and the portion of the antenna base 110 located on the right side opposite the GNSS substrate 310 are fastened together by a GNSS holder mounting screw 370, which is also located on the right side opposite the GNSS substrate 310. However, the fastening element for securing the right support base 364b and the antenna base 110 together is not limited to a fastening element such as the GNSS holder mounting screw 370. Hereinafter, the GNSS holder mounting screw 370 located on the right side opposite the GNSS substrate 310 will be referred to as the right GNSS holder mounting screw 370, as needed. The right GNSS holder mounting screw 370 penetrates the right support base 364b and is inserted into the part of the antenna base 110 that is located on the right side opposite the GNSS substrate 310.From the Z-direction, the right GNSS holder mounting screw 370 is positioned offset to the right relative to an outer edge on the right side of the upper GNSS parasitic element 340 and an outer edge on the right side of the lower GNSS parasitic element 350. Therefore, the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 are prevented from obstructing the tightening of the right GNSS holder mounting screw 370.

[0078] As in Fig. As shown in Figure 4, the upper GNSS parasitic element 340 is positioned at an upward distance from the top of the GNSS patch antenna 330. By positioning the upper GNSS parasitic element 340 at a suitable upward distance from the top of the GNSS patch antenna 330, the upward gain of the GNSS patch antenna 330 can be improved.

[0079] As in Fig. As shown in Figure 4, the upper GNSS parasitic element 340 has a substantially square frame shape when viewed from the Z-direction. Specifically, from the Z-direction, the outer and inner edges of the upper GNSS parasitic element 340 have a substantially square shape with four rounded corners.Hereinafter, a portion between the outer edge and the inner edge on the front of the upper GNSS parasitic element 340 shall be referred to as the front part of the upper GNSS parasitic element 340, as needed; a portion between the outer edge and the inner edge on the back of the upper GNSS parasitic element 340 as the rear part of the upper GNSS parasitic element 340; a portion between the outer edge and the inner edge on the left side of the upper GNSS parasitic element 340 as the left part of the upper GNSS parasitic element 340; and a portion between the outer edge and the inner edge on the right side of the upper GNSS parasitic element 340 as the right part of the upper GNSS parasitic element 340.The upper GNSS parasitic element 340 is arranged on a surface side of the mounting body 362 when the front part, the rear part, the left part and the right part of the upper GNSS parasitic element 340 overlap the front mounting body section 362a, the rear mounting body section 362b, the left mounting body section 362c and the right mounting body section 362d respectively in the Z direction.

[0080] As in Fig. As shown in Figure 4, at least a portion of the top surface of the GNSS patch antenna 330 is exposed upwards from the Z-direction by a cavity enclosed by an inner edge of the upper GNSS parasitic element 340. Therefore, a change in the impedance of the GNSS patch antenna 330 can be suppressed compared to a case where the upper GNSS parasitic element 340 covers the entire top surface of the GNSS patch antenna 330. However, the upper GNSS parasitic element 340 can cover the entire top surface of the GNSS patch antenna 330. For example, the upper GNSS parasitic element 340 can have a plate shape from the Z-direction that covers the entire top surface of the GNSS patch antenna 330.

[0081] As in Fig. As shown in Figure 4, the upper GNSS parasitic element 340 has a substantially fourfold rotationally symmetric shape with respect to the Z-direction. Therefore, even if the upper GNSS parasitic element 340 is rotated 90° about the Z-direction as viewed from the Z-direction, it can still be positioned on the surface side of the fastening body 362. Thus, a worker may position the upper GNSS parasitic element 340 in any direction about the Z-direction without having to consider which direction it should be positioned in. Therefore, the machinability of assembling the GNSS antenna 300 can be improved compared to a case in which the worker has to consider in which direction the upper GNSS parasitic element 340 is to be arranged around the Z-direction.

[0082] As in Fig. 4 and Fig. As shown in Figure 5, the top and bottom surfaces of the upper GNSS parasitic element 340 have an essentially mirror-symmetrical shape. Therefore, even if the upper GNSS parasitic element 340 is flipped in an up-down direction, it can still be positioned on the surface side of the mounting body 362. Thus, a worker may be permitted to position the top and bottom surfaces of the upper GNSS parasitic element 340 in any up-down direction without having to consider which up-down direction the top and bottom surfaces of the upper GNSS parasitic element 340 should be oriented in. Therefore, the machinability of assembling the GNSS antenna 300 can be improved compared to a case in which the worker has to consider in which top-bottom direction the top and bottom of the upper GNSS parasitic element 340 are to be arranged.

[0083] The shape of the upper GNSS parasitic element 340 is not based on the one in Fig. The example shown in Figure 4 is limited. From the Z-direction, the upper GNSS parasitic element 340 can have a substantially twice rotationally symmetric shape, a substantially three times rotationally symmetric shape, a substantially five times rotationally symmetric shape, a substantially six times rotationally symmetric shape, or a substantially N times rotationally symmetric shape (N being an integer of 2 or more). In a case where the upper GNSS parasitic element 340 has a substantially N times rotationally symmetric shape from the Z-direction, the upper GNSS parasitic element 340 itself can be arranged on the surface side of the mounting body 362 even when rotated (360 / N)° about the Z-direction. Alternatively, the upper GNSS parasitic element 340 can have a substantially ring-shaped or a substantially circular plate-shaped form from the Z-direction.Even in a case where the upper GNSS parasitic element 340 has a substantially ring-shaped or a substantially circular plate-shaped form when viewed from the Z-direction, the upper GNSS parasitic element 340 has a substantially rotationally symmetrical shape when viewed from the Z-direction. Additionally, the shape of the upper GNSS parasitic element 340 corresponds to an outer-edge shape of the element of the GNSS patch antenna 330.

[0084] As in Fig. As shown in Figure 4, the lower GNSS parasitic element 350 is positioned at a distance upwards from the top of the GNSS patch antenna 330. By positioning the lower GNSS parasitic element 350 at a suitable distance upwards from the top of the GNSS patch antenna 330, the upward gain of the GNSS patch antenna 330 can be improved.

[0085] As in Fig. As shown in Figure 4, the lower GNSS parasitic element 350 has a substantially square frame shape when viewed from the Z-direction. Specifically, from the Z-direction, the outer and inner edges of the lower GNSS parasitic element 350 have a substantially square shape with four rounded corners.Hereinafter, a portion between the outer and inner edges on the front of the lower GNSS parasitic element 350 will be referred to as the front portion of the lower GNSS parasitic element 350, as needed; a portion between the outer and inner edges on the rear of the lower GNSS parasitic element 350 as the rear portion of the lower GNSS parasitic element 350; a portion between the outer and inner edges on the left side of the lower GNSS parasitic element 350 as the left portion of the lower GNSS parasitic element 350; and a portion between the outer and inner edges on the right side of the lower GNSS parasitic element 350 as the right portion of the lower GNSS parasitic element 350. As in . Fig. As shown in Figure 4, the lower GNSS parasitic element 350 is arranged on a bottom surface side of the mounting body 362 when the front part, the rear part, the left part and the right part of the lower GNSS parasitic element 350 overlap the front mounting body section 362a, the rear mounting body section 362b, the left mounting body section 362c and the right mounting body section 362d respectively in the Z direction.

[0086] As in Fig. As shown in Figure 4, at least a portion of the top surface of the GNSS patch antenna 330 is exposed upwards from the Z-direction by a cavity enclosed by an inner edge of the lower GNSS parasitic element 350. Therefore, a change in the impedance of the GNSS patch antenna 330 can be suppressed compared to a case where the lower GNSS parasitic element 350 covers the entire top surface of the GNSS patch antenna 330. However, the lower GNSS parasitic element 350 can cover the entire top surface of the GNSS patch antenna 330. For example, the lower GNSS parasitic element 350 can have a plate shape from the Z-direction that covers the entire top surface of the GNSS patch antenna 330.

[0087] As in Fig. As shown in Figure 4, the lower GNSS parasitic element 350 has a substantially fourfold rotationally symmetric shape with respect to the Z-direction. Therefore, even if the lower GNSS parasitic element 350 is rotated 90° about the Z-direction as viewed from the Z-direction, it can still be positioned on the underside of the fastening body 362. Thus, a worker may position the lower GNSS parasitic element 350 in any direction about the Z-direction without having to consider which direction it should be positioned in. Therefore, the machinability of assembling the GNSS antenna 300 can be improved compared to a case in which the worker has to consider in which direction the lower GNSS parasitic element 350 is to be arranged around the Z-direction.

[0088] The shape of the lower GNSS parasitic element 350 is not based on the one in Fig. The example shown in Figure 4 is limited. From the Z-direction, the lower GNSS parasitic element 350 can have a substantially doubly rotationally symmetric shape, a substantially triple rotationally symmetric shape, a substantially fivefold rotationally symmetric shape, a substantially sixfold rotationally symmetric shape, or a substantially M-fold rotationally symmetric shape (M being an integer of 2 or more). In a case where the lower GNSS parasitic element 350 has a substantially M-fold rotationally symmetric shape when viewed from the Z-direction, the lower GNSS parasitic element 350 can be arranged on the underside of the mounting body 362 even when rotated (360 / M)° about the Z-direction. Alternatively, the lower GNSS parasitic element 350 can have a substantially ring-shaped or a substantially circular plate-shaped form from the Z-direction.Even in a case where the lower GNSS parasitic element 350 has a substantially ring-shaped or a substantially circular plate-shaped form when viewed from the Z direction, the lower GNSS parasitic element 350 has a substantially rotationally symmetric shape when viewed from the Z direction.

[0089] As in Fig. As shown in Figure 5, notches 352 are provided on central parts of each of the outer edges on the front, the outer edge on the back, the outer edge on the left side, and the outer edge on the right side of the lower GNSS parasitic element 350. When the lower GNSS parasitic element 350 is positioned on the underside of the mounting body 362, a right side face of an upper end part of the left support column 364a is inserted into the notch 352 provided on the outer edge on the left side of the lower GNSS parasitic element 350, and a left side face of an upper end part of the right support column 364a is inserted into the notch 352 provided on the outer edge on the right side of the lower GNSS parasitic element 350. Therefore, each notch 352 is a positioning structure for positioning the lower GNSS parasitic element 350 relative to the mounting body 362.

[0090] As in Fig. As shown in Figure 5, the four cutouts 352 are arranged in a substantially fourfold rotationally symmetric manner relative to the Z-direction. Therefore, even if the lower GNSS parasitic element 350 is rotated 90° around the Z-direction as viewed from the Z-direction, it can still be positioned relative to the mounting body 362. Consequently, a worker can position the lower GNSS parasitic element 350 in any direction around the Z-direction without having to consider its specific orientation. This improves the machinability of assembling the GNSS antenna 300 compared to situations where the worker has to consider the orientation of the lower GNSS parasitic element 350 around the Z-direction.

[0091] The number and arrangement of the cutouts 352 are not based on the one in Fig. The example shown in Figure 5 is limited. For instance, L cutouts 352 can be provided in a substantially L-fold rotationally symmetric manner (L being an integer of 2 or more) when viewed from the Z-direction. In a case where the L cutouts 352 are provided in a substantially L-fold rotationally symmetric manner when viewed from the Z-direction, the lower GNSS parasitic element 350 can be positioned relative to the mounting body 362 even when the lower GNSS parasitic element 350 is rotated (360 / L)° about the Z-direction.

[0092] The positioning structure for positioning the lower GNSS parasitic element 350 relative to the mounting body 362 is not limited to the notch 352. For example, the positioning structure can be a through-hole provided in the lower GNSS parasitic element 350. In a case where the positioning structure is the through-hole provided in the lower GNSS parasitic element 350, a projection provided on the underside of the mounting body 362 can penetrate the through-hole of the lower GNSS parasitic element 350 to position the lower GNSS parasitic element 350 relative to the mounting body 362. Similar to the four notches 352, a plurality of through-holes can be provided in a substantially rotationally symmetrical manner when viewed from the Z-direction.The positioning structure corresponding to the cutout 352 of the lower GNSS parasitic element 350 can be provided not only in the lower GNSS parasitic element 350, but also in the upper GNSS parasitic element 340. Alternatively, neither the upper GNSS parasitic element 340 nor the lower GNSS parasitic element 350 can have the positioning structure.

[0093] As in Fig. 4 and Fig. As shown in Figure 5, a pair of GNSS upper double-sided adhesive tapes 366 are provided in the front mounting body section 362a and in the rear mounting body section 362b. Hereinafter, the GNSS upper double-sided adhesive tape 366 provided in the front mounting body section 362a will be referred to as the front GNSS upper double-sided adhesive tape 366, and the GNSS upper double-sided adhesive tape 366 provided in the rear mounting body section 362b will be referred to as the rear GNSS upper double-sided adhesive tape 366, as needed. The pair of GNSS upper double-sided adhesive tapes 366 are intended to join the underside of the upper GNSS parasite element 340 and the top of the mounting body 362, and to join the top of the lower GNSS parasite element 350 and the underside of the mounting body 362.However, the adhesive material for joining the underside of the upper GNSS parasitic element 340 and the top of the mounting body 362, and for joining the top of the lower GNSS parasitic element 350 and the underside of the mounting body 362, is not limited to a double-sided adhesive tape such as the GNSS upper double-sided adhesive tape 366. The adhesive material can, for example, be a glue.

[0094] The front GNSS top double-sided adhesive tape 366 extends from the top to the bottom of the front mounting body section 362a through the back of the front mounting body section 362a. Therefore, the front GNSS top double-sided adhesive tape 366 continuously covers the top, bottom, and back of the front mounting body section 362a. That is, in a cross-section perpendicular to the Y-direction, the front GNSS top double-sided adhesive tape 366 has an essentially n-shape.

[0095] The rear GNSS top double-sided adhesive tape 366 extends from the top to the bottom of the rear mounting body section 362b through the front of the rear mounting body section 362b. Therefore, the rear GNSS top double-sided adhesive tape 366 continuously covers the top, bottom, and front of the rear mounting body section 362b. That is, in a cross-section perpendicular to the Y-direction, the rear GNSS top double-sided adhesive tape 366 has an essentially n-shape.

[0096] The underside of the front part of the upper GNSS parasitic element 340 and the top of the front mounting body section 362a are connected by a portion of the front GNSS upper double-sided adhesive tape 366, which covers the top of the front mounting body section 362a. The underside of the rear part of the upper GNSS parasitic element 340 and the top of the rear mounting body section 362b are connected by a portion of the rear GNSS upper double-sided adhesive tape 366, which covers the top of the rear mounting body section 362b. Therefore, it is possible to eliminate the need for a mechanical connection structure, such as a snap-fit ​​connection, to join the upper GNSS parasitic element 340 and the mounting body 362.Therefore, the dimensions of the GNSS antenna 300 can be reduced compared to a case where such a mechanical connection structure is provided. However, the mounting body 362 can, instead of or in addition to the adhesive material such as the GNSS upper double-sided adhesive tape 366, have a mechanical connection structure for joining the upper GNSS parasitic element 340 and the mounting body 362 to each other.

[0097] The upper surface of the front portion of the lower GNSS parasitic element 350 and the underside of the front mounting body section 362a are connected by a portion of the front GNSS upper double-sided adhesive tape 366, which covers the underside of the front mounting body section 362a. The upper surface of the rear portion of the lower GNSS parasitic element 350 and the underside of the rear mounting body section 362b are connected by a portion of the rear GNSS upper double-sided adhesive tape 366, which covers the underside of the rear mounting body section 362b. Therefore, it is possible to eliminate the need for a mechanical connection structure, such as a snap-fit ​​connection, to join the lower GNSS parasitic element 350 and the mounting body 362.Therefore, the dimensions of the GNSS antenna 300 can be reduced compared to a case where such a mechanical connection structure is provided. However, the mounting body 362 can, instead of or in addition to the adhesive material such as the GNSS upper double-sided adhesive tape 366, have a mechanical connection structure for joining the lower GNSS parasitic element 350 and the mounting body 362 to each other.

[0098] As in Fig. 4 and Fig. As shown in Figure 5, the front part of the upper GNSS parasitic element 340 and the front part of the lower GNSS parasitic element 350 are attached to the front mounting body section 362a by a front GNSS upper double-sided adhesive tape 366, which continuously covers the top, bottom, and rear of the front mounting body section 362a. Therefore, compared to a case where two double-sided adhesive tapes are provided on the top and bottom of the front mounting body section 362a, the number of components of the antenna device 10 can be reduced, and the machinability of assembling the antenna device 10 can be improved. However, two double-sided adhesive tapes can be provided on the top and bottom of the front mounting body section 362a.

[0099] As in Fig. 4 and Fig. As shown in Figure 5, the rear portion of the upper GNSS parasitic element 340 and the rear portion of the lower GNSS parasitic element 350 are attached to the rear mounting body section 362b by a rear GNSS upper double-sided adhesive tape 366, which continuously covers the top, bottom, and front of the rear mounting body section 362b. Therefore, compared to a case where two double-sided adhesive tapes are provided on the top and bottom of the rear mounting body section 362b, the number of components of the antenna device 10 can be reduced, and the machinability of assembling the antenna device 10 can be improved. However, two double-sided adhesive tapes can be provided on the top and bottom of the rear mounting body section 362b.

[0100] As in Fig. 4 and Fig. As shown in Figure 6, the pair of support bodies 364 supports the mounting body 362 when the top of the GNSS patch antenna 330 and the upper GNSS parasitic element 340 are spaced apart in the Z-direction by a predetermined distance, and the top of the GNSS patch antenna 330 and the lower GNSS parasitic element 350 are spaced apart in the Z-direction by a distance shorter than the predetermined distance. The Z-direction distance from the top of the GNSS patch antenna 330 to the upper GNSS parasitic element 340 and the Z-direction distance from the top of the upper GNSS parasitic element 340 to the lower GNSS parasitic element 350 are determined by the position of the mounting body 362 relative to the top of the GNSS patch antenna 330.Therefore, by adjusting the height of the pair of support columns 364a in the Z direction, the distance in the Z direction from the top of the GNSS patch antenna 330 to the upper GNSS parasitic element 340 and the distance in the Z direction from the top of the GNSS patch antenna 330 to the lower GNSS parasitic element 350 can be adjusted.

[0101] A support structure for bracing the mounting body 362 at a position spaced upwards from the top of the GNSS patch antenna 330 is not limited to the pair of support bodies 364 according to the embodiment. For example, the mounting body 362 can be supported by a support body attached to the outer housing 140.

[0102] As in Fig. 4 and Fig. As shown in Figure 5, the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 are attached to surfaces of the single mounting body 362 on opposite sides in the Z-direction. Therefore, the number of components of the GNSS antenna 300 can be reduced compared to a case in which the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 are each attached to two mounting bodies arranged overlapping in the Z-direction, and the machinability of assembling the GNSS antenna 300 can be improved. Furthermore, the axis ratio of the GNSS patch antenna 330 can be improved compared to a case in which only one of the upper GNSS parasitic element 340 or the lower GNSS parasitic element 350 is located above the GNSS patch antenna 330.The upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 can each be attached to two mounting bodies arranged overlapping in the Z-direction. Furthermore, only one of the upper GNSS parasitic element 340 or the lower GNSS parasitic element 350 can be positioned above the GNSS patch antenna 330. Alternatively, three or more parasitic elements can be positioned above the GNSS patch antenna 330.

[0103] As in Fig. As shown in Figure 6, the length of the lower GNSS parasitic element 350 in the X-direction and the length of the lower GNSS parasitic element 350 in the Y-direction are longer than the length of the upper GNSS parasitic element 340 in the X-direction and the length of the upper GNSS parasitic element 340 in the Y-direction, respectively, measured from the Z-direction. The length of the housing space formed by the outer housing 140 decreases towards the top in both the X- and Y-directions. Therefore, in a case where the length of the lower GNSS parasitic element 350 in the X-direction and the length of the lower GNSS parasitic element 350 in the Y-direction are longer than the length of the upper GNSS parasitic element 340 in the X-direction and the Y-direction, respectively, the following applies:The length of the upper GNSS parasitic element 340 in the Y-direction, the length of the upper GNSS parasitic element 340 in the X-direction, the length of the upper GNSS parasitic element 340 in the Y-direction, and the length of the lower GNSS parasitic element 350 in the X-direction and the length of the lower GNSS parasitic element 350 in the Y-direction are increased according to the shape of the housing space formed by the outer housing 140. However, the relationship between the length of the lower GNSS parasitic element 350 in the X- and Y-directions and the length of the upper GNSS parasitic element 340 in the X- and Y-directions is not limited to the example described above.

[0104] As in Fig. 4 and Fig. As shown in Figure 6, one end of each of the two GNSS cables 380 and the rear part of the GNSS substrate 310 are electrically connected, for example, by soldering. Fitting the outer conductor of the GNSS cable 380, or the like, into the notch of the rear part of the GNSS substrate 310 improves the machinability of soldering the GNSS cable 380 and the GNSS substrate 310. As shown in Fig. As shown in Figure 1, each GNSS cable 380 is guided from the rear part of the GNSS substrate 310 to the rear to an upper end opening of the cable passage hole 178 and from the upper end opening of the cable passage hole 178 downwards to the rear projection 176 through the cable passage hole 178.

[0105] Next, an example of a procedure for assembling the GNSS antenna 300 will be described.

[0106] First, the top of the GNSS substrate 310 and the bottom of the GNSS patch antenna 330 are joined together using the GNSS bottom double-sided adhesive tape 332. Next, one end of each of the two GNSS cables 380 and the rear part of the GNSS substrate 310 are electrically connected, for example, by soldering. However, the GNSS substrate 310 and the GNSS patch antenna 330 can be connected to each other only after the GNSS cable 380 and the GNSS substrate 310 have been electrically connected.

[0107] Next, the GNSS substrate 310 is positioned on the surface side of the antenna base 110. Next, the two GNSS cables 380 are routed downwards from the rear projection 176 through the cable entry hole 178. Finally, the GNSS substrate 310 and the antenna base 110 are fastened together using the five GNSS substrate mounting screws 320.

[0108] Next, the upper GNSS parasitic element 340, the lower GNSS parasitic element 350, and the GNSS holder 360 are provided. The pair of GNSS upper double-sided adhesive strips 366 are pre-applied in the front mounting body section 362a and the rear mounting body section 362b. The underside of the upper GNSS parasitic element 340 and the top of the mounting body 362 are then joined by a portion of the front GNSS upper double-sided adhesive strip 366 covering the top of the front mounting body section 362a, and by a portion of the rear GNSS upper double-sided adhesive strip 366 covering the top of the rear mounting body section 362b.Similarly, the top of the lower GNSS parasitic element 350 and the bottom of the mounting body 362 are connected by a portion of the front GNSS upper double-sided adhesive tape 366 covering the bottom of the front mounting body section 362a, and by a portion of the rear GNSS upper double-sided adhesive tape 366 covering the bottom of the rear mounting body section 362b.

[0109] Next, the upper GNSS parasitic element 340 is pressed against the top of the mounting body 362 to enhance the adhesive strength of the underside of the upper GNSS parasitic element 340 and the top of the mounting body 362 by the GNSS upper double-sided adhesive tape 366. Similarly, the lower GNSS parasitic element 350 is pressed against the underside of the mounting body 362 to enhance the adhesive strength of the top of the upper GNSS parasitic element 340 and the underside of the mounting body 362 by the GNSS upper double-sided adhesive tape 366.

[0110] The work of joining the underside of the upper GNSS parasitic element 340 and the top of the mounting body 362, and of joining the top of the lower GNSS parasitic element 350 and the underside of the mounting body 362, can be carried out before the work of attaching the GNSS substrate 310 and the antenna base 110 together.

[0111] Next, when the GNSS patch antenna 330, the upper GNSS parasitic element 340 and the mounting body 362 are positioned above the top of the GNSS patch antenna 330, the pair of support bases 364b and the antenna base 110 are fastened together by the pair of GNSS holder mounting screws 370. By attaching the pair of support bases 364b and the antenna base 110 together, the pair of support bodies 364 can support the mounting body 362 when the top of the GNSS patch antenna 330 and the upper GNSS parasitic element 340 are spaced apart in the Z direction by a predetermined distance, and the top of the GNSS patch antenna 330 and the lower GNSS parasitic element 350 are spaced apart in the Z direction by a distance that is shorter than the predetermined distance.

[0112] As described above, the GNSS antenna 300 is assembled on the surface side of the antenna base 110.

[0113] As in Fig. As shown in Figure 6, the front part of the lower GNSS parasitic element 350 and the two GNSS substrate mounting screws 320, which penetrate the front part of the GNSS substrate 310, overlap at least partially in the Z-direction. Similarly, the rear part of the lower GNSS parasitic element 350 and the three GNSS substrate mounting screws 320, which penetrate the rear part of the GNSS substrate 310, overlap at least partially in the Z-direction. In a case where the five GNSS substrate mounting screws 320 are tightened after the lower GNSS parasitic element 350 is positioned above the GNSS patch antenna 330, the lower GNSS parasitic element 350 may impede the tightening work of each GNSS substrate mounting screw 320 if the lower GNSS parasitic element 350 and each GNSS substrate mounting screw 320 overlap at least partially in the Z direction.Alternatively, in a case where each GNSS substrate fixing screw 320 is provided on an outside of a portion of the GNSS substrate 310 that overlaps the lower GNSS parasitic element 350 as seen from the Z direction, the dimension of the GNSS substrate 310 in the X direction and Y direction must be larger than that shown in . Fig. The dimensions of the GNSS substrate 310 shown in Figure 6 are in the X and Y directions. In this embodiment, the lower GNSS parasitic element 350 is positioned above the GNSS patch antenna 330 after each GNSS substrate mounting screw 320 has been tightened. This prevents the lower GNSS parasitic element 350 from interfering with the tightening of each GNSS substrate mounting screw 320. Consequently, the machinability of assembling the GNSS antenna 300 is improved compared to a scenario where the lower GNSS parasitic element 350 obstructs the tightening of each GNSS substrate mounting screw 320. In addition, in this embodiment it is possible to eliminate the need to provide each GNSS substrate fastening screw 320 on an outside of a part of the GNSS substrate 310 that overlaps the lower GNSS parasitic element 350 as seen from the Z direction.Therefore, the dimensions of the GNSS substrate 310 in the X and Y directions can be reduced compared to a case where each GNSS substrate fastening screw 320 is provided on the outside of a portion of the GNSS substrate 310 that overlaps the lower GNSS parasitic element 350 when viewed from the Z direction. However, viewed from the Z direction, each GNSS substrate fastening screw 320 can be provided on the outside of a portion of the GNSS substrate 310 that overlaps the lower GNSS parasitic element 350.

[0114] The upper GNSS parasitic element 340, like the lower GNSS parasitic element 350, can overlap at least partially in the Z-direction with at least one GNSS substrate fastening screw 320. Even in a case where the upper GNSS parasitic element 340 and the GNSS substrate fastening screw 320 overlap at least partially in the Z-direction, it can be prevented that the upper GNSS parasitic element 340 hinders the tightening work of the GNSS substrate fastening screw 320. Additionally, the dimensions of the GNSS substrate 310 in the X and Y directions can be reduced compared to a case in which the GNSS substrate fixing screw 320 is provided on an outside of a part of the GNSS substrate 310 that overlaps the upper GNSS parasitic element 340 as seen from the Z direction.

[0115] In this embodiment, the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 can each be pressurized towards the top and bottom of the mounting body 362, and then the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 can be positioned above the GNSS patch antenna 330. In a case where the parasitic element is held by a holder attached to the GNSS patch antenna 330, the GNSS substrate 310 can be subjected to stress due to the pressurization of the parasitic element towards the holder. On the other hand, in this embodiment it can be prevented that the negative pressure applied to the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 towards the mounting body 362 does not subject the GNSS substrate 310 to stress.

[0116] The structure and assembly method of the GNSS antenna 300 are not limited to the examples described in the embodiment.

[0117] For example, an antenna to which a parasitic element corresponding to the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 according to the embodiment and a holder corresponding to the GNSS holder 360 according to the embodiment can be applied is not limited to GNSS antennas such as the GNSS antenna 300 according to the embodiment. The parasitic element corresponding to the upper GNSS parasitic element 340 and the lower GNSS parasitic element 350 according to the embodiment and the holder corresponding to the GNSS holder 360 according to the embodiment can, for example, be applied to an SXM antenna.

[0118] Fig. Figure 7 is an exploded perspective view from above of an SXM 400 antenna according to the embodiment.

[0119] With reference to Fig. 7 and as required with reference to Fig. 1 describes the SXM 400 antenna.

[0120] As in Fig. As shown in Figure 7, the SXM antenna 400 comprises an SXM substrate 410, two SXM substrate mounting screws 420, an SXM patch antenna 430, an SXM parasitic element 440 and an SXM holder 450.

[0121] The SXM substrate 410, for example, is a PCB. As in Fig. As shown in Figure 7, the SXM substrate 410 has a substantially rectangular shape when viewed from the Z-direction, with a pair of long sides substantially parallel to the X-direction and a pair of short sides substantially parallel to the Y-direction. A substantially semicircular projection is provided on both side portions of the front edge of the SXM substrate 410 in the Y-direction. A notch is provided in a central portion of the rear edge of the SXM substrate 410 in the Y-direction. However, the shape, material, and other features of the SXM substrate 410 are not shown in Figure 7. Fig. The 7 examples shown are limited.

[0122] As in Fig. 1 and Fig. As shown in Figure 7, the SXM substrate 410 and a front portion of the antenna base 110 are fastened together in the X direction by two SXM substrate fastening screws 420. However, the fastening element for securing the SXM substrate 410 and the antenna base 110 together is not limited to a single fastening element such as the SXM substrate fastening screw 420. Each SXM substrate fastening screw 420 is conductive. Therefore, a grounding portion of the SXM substrate 410 and the antenna base 110 are electrically connected to each other via the two SXM substrate fastening screws 420. One of the two SXM substrate fastening screws 420 penetrates a projection provided on a right-hand side portion of the front edge of the SXM substrate 410 and is inserted into the antenna base 110. The other of the two SXM substrate mounting screws 420 penetrates a left side part of the rear part of the SXM substrate 410 and is inserted into the antenna base 110.

[0123] The SXM patch antenna 430 is mounted on a surface side of the SXM substrate 410 by means of an SXM double-sided adhesive tape 432. A bottom side of the SXM patch antenna 430 and a top side of the SXM substrate 410 are connected to each other by the SXM double-sided adhesive tape 432. However, the adhesive material for attaching the SXM patch antenna 430 and the SXM substrate 410 to each other is not limited to a double-sided adhesive tape such as the SXM double-sided adhesive tape 432. The adhesive material could, for example, be a glue. In the Fig. In the example shown in Figure 7, the SXM double-sided adhesive tape 432 has an essentially ring-shaped form when viewed from the Z-direction. However, the shape of the SXM double-sided adhesive tape 432 is not limited to the one shown in Figure 7. Fig. The 7 examples shown are limited.

[0124] The SXM holder 450 holds the SXM parasitic element 440 in a position spaced a predetermined distance upwards from the top of the SXM patch antenna 430. The SXM holder 450 is attached to a surface side of the SXM patch antenna 430. The SXM holder 450 has a frame shape that exposes at least a portion of the top of the SXM patch antenna 430. A pair of SXM double-sided adhesive strips 452 are provided on an inner edge on a front side and on an inner edge on a rear side of the SXM holder 450. A bottom side of the SXM parasitic element 440 and a top side of the SXM holder 450 are connected to each other by the pair of SXM double-sided adhesive strips 452.

[0125] Fig. Figure 8 is an exploded perspective view from above of an AM / FM broadcast antenna 500 according to the embodiment.

[0126] With reference to Fig. 8 and as required with reference to Fig. 1 describes the AM / FM broadcast antenna 500.

[0127] As in Fig. As shown in Figure 8, the AM / FM broadcast antenna 500 comprises an AM / FM substrate 510, two AM / FM substrate mounting screws 520, a capacitive load element 530, a lower holder 542, an upper holder 544, an AM / FM holder mounting screw 550, a helical element 560, a coil 570 and a coil mounting screw 580.

[0128] The AM / FM substrate 510, for example, is a PCB. As in Fig. As shown in Figure 8, the AM / FM substrate 510 has a substantially rectangular shape when viewed from the Z-direction, with a pair of long sides substantially parallel to the X-direction and a pair of short sides substantially parallel to the Y-direction. However, the shape, material, and other characteristics of the AM / FM substrate 510 are not related to the one shown in Figure 8. Fig. The example shown is limited to 8.

[0129] As in Fig. 8 and Fig.As shown in Figure 1, the AM / FM substrate 510 and part of the antenna base 110 between the V2X antenna 200 and the GNSS antenna 300 are fastened together by two AM / FM substrate mounting screws 520. However, the fastening element for securing the AM / FM substrate 510 and the antenna base 110 together is not limited to a single fastening element such as the AM / FM substrate mounting screw 520. Each AM / FM substrate mounting screw 520 is conductive. Therefore, a grounding portion of the AM / FM substrate 510 and the antenna base 110 are electrically connected to each other via the two AM / FM substrate mounting screws 520. One of the two AM / FM substrate mounting screws 520 penetrates a left side panel of the front part of the AM / FM substrate 510 and is inserted into the antenna base 110. The other of the two AM / FM substrate mounting screws 520 penetrates a right side panel of the rear part of the AM / FM substrate 510 and is inserted into the antenna base 110.

[0130] The capacitive load element 530 is held above the AM / FM substrate 510 by the lower holder 542 and the upper holder 544. The lower holder 542 and the antenna base 110 are fastened together by an AM / FM holder mounting screw 550. However, the fastening element for attaching the lower holder 542 and the antenna base 110 together is not limited to a fastening element such as the AM / FM holder mounting screw 550. The upper holder 544 is positioned above the lower holder 542. The capacitive load element 530 is attached to both side faces of the upper holder 544 in the Y-direction.

[0131] The helical element 560 is wound around the coil 570. The coil 570 and the lower holder 542 are tightened together by a coil fastening screw 580. The coil fastening screw 580 penetrates the coil 570 in the Z-direction and is inserted into the lower holder 542. The coil 570 is essentially parallel to the Z-direction. An upper end portion of the helical element 560 is electrically connected to the capacitive load element 530. A lower end portion of the helical element 560 is electrically connected to the AM / FM substrate 510.

[0132] The embodiments of the present invention have been described above with reference to the drawings. However, the embodiment shown is merely an example of the present invention, and various configurations other than those described above can also be adopted.

[0133] For example, the number and type of antennas arranged on the surface side of the antenna base 110 are not limited to the number and type of antennas according to the embodiment. For example, the antenna device 10 may not include the SXM antenna 400 and the AM / FM broadcast antenna 500. Alternatively, the antenna device 10 may also include other antennas such as a telematics antenna (telephone antenna, TEL antenna), a Wi-Fi (registered trademark) antenna, a Digital Audio Broadcasting (DAB) antenna, a keyless antenna, an antenna corresponding to a linearly polarized wave (vertical polarization, horizontal polarization), a Bluetooth (registered trademark) antenna, and a smart entry antenna.

[0134] According to the present specification, the following aspects of an antenna device are provided. (Aspect 1)

[0135] In aspect 1, an antenna device comprises an antenna element comprising a conductor, at least part of which comprises sections spaced apart from each other by a gap, and a holder holding the antenna element, the holder having a rib inserted into the gap.

[0136] The "antenna element" corresponds to the "V2X element" in the embodiment described above. The "conductor" corresponds to the "wound conductor" in the embodiment described above. The "holder" corresponds to the "V2X holder" in the embodiment described above.

[0137] According to the aspect described above, the dimensions of the gap between at least sections of the conductor can be ensured by ensuring the dimensions of the rib. Therefore, the variation in the performance of the antenna encompassing the conductor can be suppressed compared to a case where the rib is not inserted into the gap. (Aspect 2)

[0138] In aspect 2, the conductor comprises a winding section that is wound in a predetermined shape from one section to another section of the at least one part.

[0139] According to the aspect described above, the winding section can act as an inductance component. Furthermore, the dimensions of the gap between at least some sections of the conductor can be ensured by ensuring the dimensions of the rib. Therefore, the variation in the power of the conductor's inductance component can be suppressed compared to a case where the rib is not inserted into the gap. (Aspect 3)

[0140] In aspect 2, the rib extends in a direction that intersects a direction from a center of an area enclosed by the wrapping part towards the gap.

[0141] As described above, the antenna element can slide along the rib, with the rib being inserted into the gap between at least sections of the conductor. Therefore, the antenna element and the holder can be easily assembled compared to a case where the antenna element cannot slide along the rib. (Aspect 4)

[0142] In aspect 4, one section and the other section of the winding part are positioned offset from each other.

[0143] According to the aspect described above, the antenna element can easily slide along the rib, with the rib being inserted into the gap between one section and the other section of the winding part, compared to a case where one section and the other section of the winding part are not positioned offset from each other. (Aspect 5)

[0144] In aspect 5, the rib is inclined obliquely opposite a direction perpendicular to a central axis of the winding part.

[0145] According to the aspect described above, the antenna element can easily slide along the rib, with the rib being inserted into the gap between one section and the other section of the winding part, compared to a case where the rib is parallel to a direction perpendicular to the central axis of the winding part. (Aspect 6)

[0146] In aspect 5, if the rib is not inserted into the gap, a dimension of the rib in a direction perpendicular to an insertion direction of the rib into the gap is equal to or greater than a dimension of the gap in the direction perpendicular to the insertion direction of the rib into the gap.

[0147] According to the aspect described above, the rib can be reliably inserted into the gap when the rib is not inserted into the gap, compared to a case where the dimension of the rib is smaller than the dimension of the gap.

[0148] This application claims priority based on Japanese patent application No. 2023-104361, filed on June 26, 2023, the disclosure of which is hereby incorporated by reference in its entirety. LIST OF REFERENCE MARKS

[0149] 10 Antenna assembly, 110 Antenna base, 112 Conductive protrusion, 114 Front through-hole, 116 Rear through-hole, 120 Mounting element, 122 Washer, 122a Arm, 124 Screw, 130 Gasket, 140 Outer housing, 150 Pad, 160 Housing mounting screw, 170 Pre-locking holder, 172 Holder base, 172a Cable hook, 174 Front protrusion, 176 Rear protrusion, 178 Cable through-hole, 200 V2X antenna, 210 V2X substrate, 212 V2X front hole, 214 V2X rear hole, 216 V2X large diameter hole, 218 V2X notch, 220 V2X substrate mounting screw 230 V2X element, 232 lower linear conductor, 234 upper linear conductor, 234a first upper linear conductor section, 234b second upper linear conductor section, 236 wound conductor, 236a wound lower end, 236b wound upper end, 240 V2X holder, 241 base plate, 241a lower guide groove, 241b lower front projection, 241c lower rear projection, 242 top plate, 242a upper guide groove242b upper hook, 242b1 upper elastic rib, 242b2 upper projection, 242c upper positioning wall, 243 front column, 244 rear column, 244a rib, 245 lower rib, 245a lower guide groove, 245b lower hook, 245b1 lower elastic rib, 245b2 lower projection, 246 middle rib, 246a middle guide groove, 247 upper rib, 250 V2X bracket mounting screw, 260 V2X cable, 300 GNSS antenna, 310 GNSS substrate, 320 GNSS substrate mounting screw, 330 GNSS patch antenna, 332 GNSS lower double-sided adhesive tape, 340 upper GNSS parasitic element, 350 lower GNSS parasitic element, 352 notch, 360 GNSS holder, 362 mounting body, 362a front mounting body section, 362b rear mounting body section, 362c left mounting body section, 362d right mounting body section, 364 support body, 364a support column, 364b support base, 366 GNSS upper double-sided adhesive tape, 370 GNSS holder mounting screw, 380 GNSS cable, 400 SXM antenna410 SXM substrate, 420 SXM substrate mounting screw, 430 SXM patch antenna, 432 SXM double-sided adhesive tape, 440 SXM parasitic element, 450 SXM holder, 452 SXM double-sided adhesive tape, 500 AM / FM broadcast antenna, 530 capacitive load element, 542 lower holder, 544 upper holder, 560 helical element, 570 coil, 580 coil mounting screw QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 2005-175557

[0003] JP 2023-104361

[0148]

Claims

[1] An antenna device comprising: an antenna element comprising a conductor, at least part of which comprises sections spaced apart from each other by a gap; and a holder that holds the antenna element, the holder has a rib that is inserted into the gap. [2] The antenna device according to claim 1, wherein the conductor comprises a winding part which is wound in a predetermined shape from one section to another section of the at least one part. [3] The antenna device according to claim 2, wherein the rib extends in a direction that intersects a direction from a center of an area enclosed by the winding part towards the gap. [4] The antenna device according to claim 2, wherein one section and the other section of the winding part are positioned offset from each other. [5] The antenna device according to claim 2, wherein the rib is inclined obliquely relative to a direction perpendicular to a central axis of the winding part. [6] The antenna device according to any one of claims 1 to 5, wherein, when the rib is not inserted into the gap, a dimension of the rib in a direction perpendicular to an insertion direction of the rib into the gap is equal to or greater than a dimension of the gap in the direction perpendicular to the insertion direction of the rib into the gap.

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