JP2019080095A - Antenna device - Google Patents

Abstract

To provide an antenna device having a structure capable of realizing low profile easily.SOLUTION: An antenna device includes a GNSS antenna 8, a second circuit board 9 having a third groove 93, and a third coaxial cable 113. The third coaxial cable 113 is fitted in the third groove 93. The third groove 93 is formed at a position separated from the peripheral part of the second circuit board 9. The GNSS antenna 8 is provided on the top face of the second circuit board 9, the third coaxial cable 113 is provided on the underside of the second circuit board 9, the GNSS antenna 8 and the third coaxial cable 113 are connected electrically, and at least a part of the third coaxial cable 113 is fitted in the third groove 93. The third groove 93 has a groove 93a for third sleeve in which the third sleeve 113c1 covering the third outer conductor 113c of the third coaxial cable 113 is fitted, and a groove 93b for third protective coating in which the third protective coating 113d of the third coaxial cable 113 is fitted.SELECTED DRAWING: Figure 9

Description

  The present invention relates to an antenna device.

  Conventionally, as disclosed in Patent Document 1, an on-vehicle antenna device has been proposed.

JP, 2016-025477, A

  However, due to the relationship between the coaxial cable, the substrate, and the antenna element in the antenna device, a reduction in height to further shorten the dimension in the vertical direction is required.

  Therefore, an object of the present invention is to provide an antenna device having a structure that can easily realize a reduction in height.

  An antenna device according to the present invention includes an antenna element, a substrate having a groove, and a coaxial cable, and the coaxial cable is fitted in the groove.

  Thereby, the position of the inner conductor of the coaxial cable is brought closer to the substrate as compared with a mode in which the coaxial cable is attached to the substrate such that the coaxial cable contacts the surface of the substrate without providing the groove, and the substrate and the coaxial cable are included. It is possible to reduce the thickness of the antenna device and to reduce the height of the antenna device.

  In addition, the amount of bending of the inner conductor is reduced by bringing the inner conductor of the coaxial cable closer to the substrate as compared with a mode in which the coaxial cable is attached to the substrate such that the coaxial cable contacts the surface of the substrate without providing the groove. Can reduce the possibility of breakage due to bending.

  Preferably, the grooves are formed at positions away from the peripheral edge of the substrate.

  This makes it possible to secure the strength of the substrate.

  Also preferably, the antenna element is provided on the upper surface of the substrate, the coaxial cable is provided on the lower surface of the substrate, the antenna element and the coaxial cable are electrically connected, and at least a part of the coaxial cable is fitted in the groove. ing.

By providing the groove, it is possible to position the upper end of the coaxial cable above the lower surface of the substrate.
Therefore, the position of the inner conductor of the coaxial cable is raised upward as compared with a mode in which the coaxial cable is attached to the substrate so that the upper end of the coaxial cable is in contact with the lower surface of the substrate without providing the groove. Thus, it is possible to reduce the thickness in the vertical direction, including the above, and to reduce the height of the antenna device.

  In addition, the inner conductor of the coaxial cable is brought closer to the substrate as compared with a mode in which the coaxial cable is attached to the substrate so that the upper end of the coaxial cable is in contact with the lower surface of the substrate Can reduce the possibility of breakage due to bending.

  Preferably, the groove has a first groove in which a member covering the outer conductor of the coaxial cable is fitted separately from the coaxial cable, and a second groove in which a member covering the outer conductor in the coaxial cable is fitted.

  In addition, preferably, the substrate or a substrate different from the substrate is provided with a hole, and the antenna device further includes an antenna element different from the antenna element, and the other antenna element is provided with a rectangular protrusion at the lower end and the protrusion The lower end portion of the protrusion is twisted and the other antenna element is temporarily fixed to the substrate or another substrate while being erected on the substrate or another substrate with the protrusion inserted in the hole.

Since the temporary fixing is performed by twisting the lower end portion of the protrusion, the possibility that the protrusion may scrape the surface of the substrate can be reduced when the twisting is performed.
In addition, in order to avoid scraping and bending, it is not necessary to provide a notch (a gap in the vertical direction) or the like in the vicinity of the boundary with the protrusion in the other antenna element.
Also, stress can be dispersed compared to bending.

  For this reason, the height of the antenna device can be reduced by the amount that the vertical dimension of the protrusion can be shortened, and the cost can be reduced by the amount that can simplify the shape of the region where the protrusion is provided in the other antenna element. Can reduce the possibility of breakage of the other antenna element including the protrusion.

  The antenna device according to the present invention includes a substrate provided with a hole, and an antenna element provided with a rectangular protrusion at the lower end and standing on the substrate through the protrusion, and the protrusion is inserted into the hole Then, the projection is twisted and the antenna element is temporarily fixed to the substrate.

Since the temporary fixing is performed by twisting the protrusion, the possibility of the protrusion cutting off the surface of the substrate can be reduced when the twisting is performed.
Further, it is not necessary to provide a notch (a gap in the vertical direction) or the like in the vicinity of the boundary between the antenna element and the projection in order to avoid scraping and to perform bending.
Also, stress can be dispersed compared to bending.

  For this reason, the height of the antenna device can be reduced by the amount that can shorten the vertical dimension of the protrusion, and the cost can be reduced by the amount that can simplify the shape of the region where the protrusion is provided in the antenna element. Thus, the possibility of breakage of the antenna element including the projection can be reduced.

  As described above, according to the present invention, it is possible to provide an antenna device having a structure that can easily achieve a reduction in height.

The antenna case is abbreviate | omitted with the perspective view of the antenna apparatus in this embodiment. It is a perspective view of each part before assembling an antenna device. In the side view of an antenna device, an antenna case is omitted. In the top view of the antenna device, the antenna case is omitted. It is the perspective view which looked at the 2nd circuit board, the GNSS antenna, the 2nd coaxial cable, and the 3rd coaxial cable from the front and the top. It is the perspective view which looked at the 2nd circuit board, the GNSS antenna, the 2nd coaxial cable, and the 3rd coaxial cable from back and from the top. FIG. 7 is a cross-sectional view taken along line A-A ′ of FIGS. 5 and 6; In the cross-sectional block diagram of the B-B 'line | wire of FIG.5 and FIG.6, the structure of the content of GNSS antenna is abbreviate | omitted. In the cross-sectional block diagram of the C-C 'line | wire of FIG.5 and FIG.6, the structure of the content of GNSS antenna is abbreviate | omitted. The second circuit board, the GNSS antenna, and the third coaxial cable are configured such that the third coaxial cable is attached to the second circuit board such that the upper end of the protective coating is in contact with the lower surface of the second circuit board without providing the groove portion. It is a side view of the provided part. It is a figure showing the state before the 1st antenna element is inserted in the 1st circuit board with the side view of the lower part of the 1st antenna element, and the sectional view of the 1st circuit board. The side view of the lower part of the 1st antenna element, and the sectional view of the 1st circuit board, it is a figure showing the state before the 1st antenna element is inserted in the 1st circuit board and twist is added to the 1st projection. . It is a bottom view of the part in which the 1st projection and the 1st hole were provided, and is a figure showing the state before twist is added to the 1st projection. It is the perspective view which looked at the 1st antenna element and the 1st circuit board from the bottom, and is a figure showing the state before twist is added to the 1st projection. The side view of the lower part of the first antenna element and the sectional view of the first circuit board, showing the state after the first antenna element is inserted into the first circuit board and the first projection is twisted. is there. It is a bottom view of the part in which the 1st projection and the 1st hole were provided, and is a figure showing the state where twist was added to the 1st projection. It is the perspective view which looked at the 1st antenna element and the 1st circuit board from the bottom, and is a figure showing the state after twist is added to the 1st projection. It is a figure showing the state before the 1st antenna element is inserted in the 1st circuit board with the side view of the lower part of the 1st antenna element containing a L-shaped claw, and the sectional view of the 1st circuit board. A side view of the lower portion of the first antenna element including the L-shaped claw and a cross-sectional view of the first circuit board, the state before the first antenna element is inserted into the first circuit board and the claw is bent FIG. In the side view of the lower part of the first antenna element including the L-shaped claw and the sectional view of the first circuit board, a state after the first antenna element is inserted into the first circuit board and the claw is bent FIG.

  Hereinafter, the present embodiment will be described using the drawings. The antenna device 1 in the present embodiment is attached to the top surface of a vehicle such as a roof, and the antenna case 2, the first antenna element 4, the first antenna element holder 4a, the first circuit board 6, the second antenna element 7, and the second antenna Element holder 7a, GNSS (Global Navigation Satellite System) antenna 8, second circuit board 9, shield cover 10, coaxial cable 11 (first coaxial cable 111, second coaxial cable 112, third coaxial cable 113 , Metal base 12, pad 13 and temporary fixing member 14 (see FIGS. 1 to 9 and FIGS. 11 to 17).

  In order to explain the direction, the longitudinal direction of the vehicle to which the antenna device 1 is attached will be described as the x direction, the lateral direction perpendicular to the x direction as the y direction, and the substantially vertical direction perpendicular to the x direction and the y direction as the z direction. In FIG. 1, the directions indicated by the respective arrows of the x, y, and z axes are defined as a forward direction, a right direction, and an upper direction, respectively.

The antenna case 2 is a member which covers the members constituting the antenna device 1 and is made of synthetic resin including non-light transmitting and radio wave transmitting synthetic resin (polycarbonate and ABS (Acrylonitrile Butadiene Styrene copolymer)). Resin molded product), for example, it has a shark fin shape which is inclined so that the x direction front is lower than the x direction back, and both side surfaces are curved inward.
The lower surface of the antenna case 2 is open and is a member constituting the antenna device 1 and covers the components other than the antenna case 2 (such as the GNSS antenna 8) from above in the z direction.

The antenna case 2 is provided with mounting holes (not shown) for attachment to the metal base 12 and the pad 13 so as to project downward from the inner wall in the z direction, and when fixing the antenna case 2 to the metal base 12 or the like. Then, screwing is performed via the mounting hole of the antenna case 2, the mounting hole (first mounting hole 12 a) of the metal base 12, and the mounting hole (second mounting hole 13 a) of the pad 13.
In the present embodiment, an example in which six attachment holes are provided on the inner wall of the antenna case 2 is shown, but the number of attachment holes is not limited to this.

  The first antenna element 4 is an antenna element for mobile communication using a telephone line, communicates with a mobile phone base station, receives information from a terminal in a call state, and transmits information to the terminal Used for communication (for transmission and reception).

  The first antenna element 4 is formed in a plate shape, and has a shape including a ridge portion having a substantially constant z-direction height and a side portion extending in the z-direction from the ridge portion.

  At the lower end of one of the side portions of the first antenna element 4 (right side when viewed from the rear in the x direction), a rectangular first projection 41 projecting downward in the z direction is provided. One antenna element 4 is attached to the first circuit board 6.

  Specifically, the first antenna element 4 is erected on the first circuit board 6 by inserting the first protrusion 41 into the first hole 6 a of the first circuit board 6.

  Between the first antenna element 4 and the first circuit board 6, a first antenna element holder 4a for holding the first antenna element 4 is provided.

The first antenna element 4 is attached to the top surface of the first circuit board 6.
The first circuit board 6 is attached to the metal base 12 by screwing.

  The first circuit board 6 is provided with a first groove 61 extending in the x direction and a first hole 6 a.

  The first groove 61 is a portion close to the first antenna element 4 in the first coaxial cable 111 disposed below the first circuit board 6 (a member covering the first outer conductor separately from the first coaxial cable 111 At least the lower surface has a concave shape so that (first sleeve 111c1)) fits.

  The first groove 61 has a groove width in the y direction such that the first sleeve 111c1 covering the first outer conductor of the first coaxial cable 111 fits into the recessed portion (the outer diameter of the first sleeve 111c1> first). Groove width in the y direction of the groove 61).

In the first groove 61, if there is a recess into which the upper portion of the first sleeve 111c1 covering the first outer conductor fits, even if the recess portion penetrates in the z direction, it does not penetrate It may be.
However, in order to allow the first coaxial cable 111 to be inserted slightly upward in the z direction, it is desirable that the first coaxial cable 111 be penetrated in the z direction.

  The first groove 61 may be formed in a notch shape in contact with the peripheral portion of the first circuit board 6 or may be formed at a position away from the peripheral portion of the first circuit board 6 It may be in the form.

  In the present embodiment, an example is shown in which the first groove 61 is formed in a notch shape in contact with the peripheral portion of the first circuit board 6.

  The first hole 6a is a hole into which the first protrusion 41 of the first antenna element 4 is inserted so as to penetrate downward in the z direction from above in the z direction, and has the same shape and size as the outer shape of the xy cross section of the first protrusion 41 Have

  The first projection 41 of the first antenna element 4 is inserted into the first hole 6a from above in the z direction to below in the z direction, and is inserted so that the lower end projects from the lower surface of the first circuit board 6 (FIG. 12) See Figure 14).

  In the state of being inserted into the first hole 6a, at least one of the lower end portions of the first projections 41 in the longitudinal direction is twisted and temporary fixing of the first antenna element 4 to the first circuit board 6 is performed. (See FIGS. 15-17).

Before this twisting is performed, both ends 41a in the longitudinal direction of the lower end portion of the first protrusion 41 are positioned on a straight line parallel to the x direction and positioned below the first hole 6a in the z direction.
After the twisting is performed, at least one of the both ends 41a is shifted from the lower side of the first hole 6a in the z direction, and the first protrusion 41 is not easily removed from the first circuit board 6.

In the present embodiment, an example in which the first protrusion 41 is inserted into the substantially rectangular first hole 6a longer in the x direction than in the y direction has been described, but the longitudinal direction of the first hole 6a is the x direction Not necessarily parallel to
For example, when the first hole 6a has a substantially rectangular shape longer in the y direction than in the x direction, both ends 41a in the longitudinal direction of the lower end portion of the first protrusion 41 are parallel to the y direction before this twisting is performed. It is located on a straight line and located below the first hole 6a in the z direction.

  However, since the movement is limited by the first hole 6a in the region where the height of the first protrusion 41 in the z direction is the same as that of the first hole 6a, the shape hardly changes due to such twisting.

  By this twisting, the first antenna element 4 is temporarily fixed to the first circuit board 6.

  In the present embodiment, an example in which both ends 41 a in the longitudinal direction which is the lower end portion of the first protrusion 41 and parallel to the x direction are twisted is shown.

  Thereafter, the first protrusion 41 is soldered, and the first protrusion 41 and the first circuit board 6 are electrically connected.

The temporary fixing is performed by twisting at least one of the lower ends of the first protrusions 41 located at a distance from the lower surface of the first circuit board 6 and both ends 41 a in the longitudinal direction. It is possible to reduce the possibility that the protrusions 41 scrape the surface of the first circuit board 6.
Further, it is not necessary to provide a notch (a gap in the z direction) or the like in the vicinity of the boundary between the first antenna element 4 and the first projection 41 in order to avoid scraping and to perform bending.
Also, stress can be dispersed compared to bending.

  Therefore, using the first antenna element 4 including the substantially L-shaped claw 410 and the notch 420 when viewed from the y direction, a part of the claw 410 is bent and temporarily fixed (FIGS. 18 to 20). The height of the antenna device 1 can be reduced by the amount by which the dimension of the first protrusion 41 in the z direction can be reduced as compared with the shape of the first protrusion 41 in the first antenna element 4. The cost can be reduced by the amount that can be simplified, and the possibility of breakage of the first antenna element 4 including the first protrusion 41 can be reduced.

  The second antenna element 7 is an antenna element for mobile communication using a telephone line, and is used to communicate with a mobile phone base station and receive information from a terminal in a call state (reception only ).

  The second antenna element 7 is formed in a plate shape and has a shape including a planar ridge line portion inclined so that the x direction front is lower than the x direction rear, and a side surface portion extending in the z direction from the ridge line portion .

  At the lower end of one of the side portions of the second antenna element 7 (left side when viewed from the rear in the x direction), a rectangular second projection 71 projecting downward in the z direction is provided, and the second projection 71 The two antenna elements 7 are attached to the second circuit board 9.

  Specifically, the second projection 71 is inserted into the second hole 9 a of the second circuit board 9, whereby the second antenna element 7 is erected on the second circuit board 9.

  Between the second antenna element 7 and the second circuit board 9, a second antenna element holder 7a for holding the second antenna element 7 is provided.

The GNSS antenna 8 is used to receive position information and time information of the satellite from a GPS (Global Positioning System) satellite or the like.
The GNSS antenna 8 is a patch antenna which is a second circuit board 9 and is mounted on the front side of the second antenna element 7 in the x direction.

The second circuit board 9 is disposed in the x direction forward of the first circuit board 6, the GNSS antenna 8 and the second antenna element 7 are attached to the upper surface, and electronic components such as an amplifier of the GNSS antenna 8 are attached to the lower surface .
The second circuit board 9 is attached to the metal base 12 by screwing.
The second circuit board 9 is provided with a second groove 92 extending in the x direction, a third groove 93 extending in the x direction on the front side of the second groove 92 in the x direction, and a second hole 9 a.

  The second groove 92 is a portion close to the second antenna element 7 in the second coaxial cable 112 disposed below the second circuit board 9 (which covers the second outer conductor 112 c separately from the second coaxial cable 112. At least the lower surface has a concave shape so that a member (second sleeve 112c1) and a member (second protective coating 112d) covering the second outer conductor 112c of the second coaxial cable 112 can be fitted.

  The second groove 92 includes a second sleeve groove 92a in which the second sleeve 112c1 covering the second outer conductor 112c is fitted and a second protective coating groove 92b in which the second protective coating 112d is fitted (see FIG. 5, see Figure 6).

  The second sleeve groove portion 92a has a groove width in the y direction such that the upper portion of the second sleeve 112c1 covering the second outer conductor 112c of the second coaxial cable 112 fits into the recessed shape portion (of the second sleeve 112c1 Outer diameter> groove width in the y direction of the groove portion 92 a for the second sleeve).

  The second protective covering groove 92b has a groove width in the y direction wider than the groove width in the y direction of the second sleeve groove 92a, and the concave portion is made of the second protective covering 112d of the second coaxial cable 112. The groove width of the y direction in which the upper portion fits (the outer diameter of the second protective coating 112d> the groove width of the second protective coating groove 92b in the y direction> the groove width of the second sleeve groove 92a in the y direction) .

The second groove 92 has a recess through which the second sleeve 112c1 covering the second outer conductor 112c and the second protective coating 112d fit, even if the recess portion penetrates in the z direction. It may not be in the form.
However, in order to allow the second coaxial cable 112 to be fitted in the upper part in the z direction as much as possible, it is desirable that the second coaxial cable 112 be penetrated in the z direction.

  The second groove 92 may be formed in a notch shape in contact with the peripheral portion of the second circuit board 9 or may be formed at a position away from the peripheral portion of the second circuit board 9 It may be in the form.

  In the present embodiment, an example is shown in which the second groove 92 is formed in a notch shape in contact with the peripheral portion of the second circuit board 9.

  The third groove 93 is a portion close to the GNSS antenna 8 in the third coaxial cable 113 disposed below the second circuit board 9 (a member covering the third outer conductor 113 c separately from the third coaxial cable 113 At least the lower surface of the third sleeve 113c1) and the third coaxial cable 113 have a concave shape such that a member (third protective coating 113d) covering the third outer conductor 113c is fitted.

  The third groove 93 is formed of a third sleeve groove 93a in which the third sleeve 113c1 covering the third outer conductor 113c is fitted and a third protective coating groove 93b in which the third protective coating 113d is fitted (see FIG. 6).

  The third sleeve groove 93a has a groove width in the y direction such that the upper portion of the third sleeve 113c1 covering the third outer conductor 113c of the third coaxial cable 113 fits into the recessed portion (the third sleeve 113c1 Outer diameter> y-direction groove width of the third sleeve groove 93a).

  The third protective covering groove 93b has a groove width in the y direction wider than the groove width in the y direction of the third sleeve groove 93a, and the recessed portion is the third protective covering 113d of the third coaxial cable 113. The groove width in the y direction is such that the upper portion fits (the outer diameter of the third protective coating 113d> the groove width in the y direction of the groove portion 93b for the third protective cover> the groove width in the y direction of the groove portion 93a for the third sleeve) .

The third groove 93 has a recess through which the third sleeve 113c1 and the third protective cover 113d covering the third outer conductor 113c fit, and the third groove 93 penetrates even if the recess portion penetrates in the z direction. It may not be in the form.
However, in order to allow the third coaxial cable 113 to be fitted in the upper part in the z direction as much as possible, it is desirable that the third coaxial cable 113 be penetrated in the z direction.

The third groove 93 may be formed in a notch shape in contact with the peripheral portion of the second circuit board 9 or may be formed at a position away from the peripheral portion of the second circuit board 9 It may be in the form.
However, in order to prevent breakage such as a crack and secure the strength of the second circuit board 9, it is preferable that the form formed at a position away from the peripheral portion of the second circuit board 9.

In the present embodiment, an example in which the third groove 93 is configured by an elongated hole penetrating in the z direction at a position separated from the peripheral portion of the second circuit board 9 is shown.
This makes it possible to secure the strength of the second circuit board 9 as compared to the form formed in a notch shape in contact with the peripheral portion of the second circuit board 9.

  The second hole 9a is a hole into which the second projection 71 of the second antenna element 7 is inserted so as to penetrate downward in the z direction from above in the z direction, and has substantially the same shape and size as the outer shape of the xy cross section of the second projection 71 Have

  The second projection 71 of the second antenna element 7 is inserted into the second hole 9 a from above in the z direction to below in the z direction, and is inserted so that the lower end projects from the lower surface of the second circuit board 9.

  In the state of being inserted into the second hole 9a, at least one of both ends in the lower end portion of the second protrusion 71 in the longitudinal direction is twisted to temporarily fix the second antenna element 7 to the second circuit board 9 It will be.

Before such twisting is performed, both ends in the longitudinal direction of the lower end portion of the second protrusion 71 are positioned on a straight line parallel to the x direction and positioned below the second hole 9 a in the z direction.
After the twisting is performed, at least one of the both ends is shifted from the lower side of the second hole 9 a in the z direction, so that the second protrusion 71 is unlikely to come off the second circuit board 9.

In the present embodiment, the second protrusion 71 is inserted into the substantially rectangular second hole 9a longer in the x direction than in the y direction. However, the longitudinal direction of the second hole 9a is the x direction. Not necessarily parallel to
For example, when the second hole 9a has a substantially rectangular shape longer in the y direction than the x direction, both ends of the lower end portion of the second protrusion 71 in the longitudinal direction are straight lines parallel to the y direction before the twisting is performed. It is located on the upper side, and is located below the second hole 9a in the z direction.

  However, since the movement is limited by the second holes 9a in the region where the heights of the second projections 71 in the z direction are the same as those of the second holes 9a, the shape hardly changes due to such twisting.

  The second antenna element 7 is temporarily fixed to the second circuit board 9 by this twisting.

  Thereafter, the second protrusion 71 is soldered, and the second protrusion 71 and the second circuit board 9 are electrically connected.

  In addition, since the shape and procedure of the twist of the 2nd protrusion 71 are the same as the shape and procedure of the twist of the 1st protrusion 41 (refer to FIGS. 11-17), illustration regarding the twist of the 2nd protrusion 71 is abbreviate | omitted, There is.

The temporary fixing is performed by twisting at least one of the lower ends of the second protrusions 71 located at a distance from the lower surface of the second circuit board 9 and at both ends in the longitudinal direction. It is possible to reduce the possibility that the surface 71 may scrape the surface of the second circuit board 9.
Further, it is not necessary to provide a notch (a gap in the z direction) or the like in the vicinity of the boundary between the second antenna element 7 and the second projection 71 in order to avoid scraping and to perform bending.
Also, stress can be dispersed compared to bending.

  Therefore, using the antenna element including the substantially L-shaped claw and the notch when viewed from the y direction, the second protrusion 71 in the z direction is bent as compared with a mode in which a part of the claw is bent and temporarily fixed. It is possible to reduce the height of the antenna device 1 as much as the size can be shortened, and the cost can be reduced as much as the shape of the region where the second projection 71 is provided in the second antenna element 7 can be simplified. The possibility of breakage of the second antenna element 7 including the second protrusion 71 can be reduced.

A metal shield cover 10 covering the electronic component is provided in a region on the lower surface of the second circuit board 9 to which the component related to the GNSS antenna 8 such as an amplifier is attached.
The shield cover 10 is an electronic component provided on the lower surface of the second circuit board 9 and is provided to protect an amplifier or the like related to the GNSS antenna 8 from ambient noise.
However, the electronic components related to the second antenna element 7 are not covered by the shield cover 10.

The coaxial cable 11 includes a first coaxial cable 111, a second coaxial cable 112, and a third coaxial cable 113.
The first coaxial cable 111 is electrically connected to the first antenna element 4 via the first circuit board 6.
The second coaxial cable 112 is electrically connected to the second antenna element 7 via the second circuit board 9.
The third coaxial cable 113 is electrically connected to the GNSS antenna 8 via the second circuit board 9.

The third coaxial cable 113 has a third inner conductor 113a, a third insulator 113b covering the third inner conductor 113a, a third outer conductor 113c covering the third insulator 113b, and a third protection covering the third outer conductor 113c. It has a coating 113d.
A third sleeve 113c1 covering the exposed portion is attached to a portion where the third outer conductor 113c is exposed.

  A portion close to the GNSS antenna 8 in the third coaxial cable 113 is a first region where the third inner conductor 113a is exposed from the tip, a second region where the third insulator 113b covering the third inner conductor 113a is exposed, a third insulation The third region where the third sleeve 113c1 is attached to the outside of the third outer conductor 113c covering the body 113b, the fourth region where the third outer conductor 113c covering the third insulator 113b is exposed, and the third outer conductor 113c It is comprised by the 5th area | region covered by the 3rd protective coating 113d.

The third sleeve 113c1 is formed of a metal ring (tube), and is used to protect the surface of the third outer conductor 113c configured in a mesh shape.
Specifically, by providing the third sleeve 113c1, during soldering, the insulator (for example, the third insulator 113b) inside the third outer conductor 113c cures and shrinks due to the influence of heat and is broken. You can prevent it.

The third inner conductor 113a in the first region is soldered with its tip bent so as to approach the lower surface of the second circuit board 9, and is electrically connected to the GNSS antenna 8 through the second circuit board 9. Connected
A gap is provided between the second circuit board 9 and the metal base 12 so that the solder used to attach the third inner conductor 113 a by a predetermined amount does not contact the metal base 12.

  The third insulator 113b in the second region is in contact with the lower surface of the second circuit board 9, the third sleeve 113c1 in the third region fits in the third sleeve groove 93a, and the third protective coating 113d in the fifth region is the third The third coaxial cable 113 is disposed in such a positional relationship that the third protective coating 113 d in a region farther from the GNSS antenna 8 than in the fifth region is in contact with the lower surface of the second circuit board 9. It is attached to the lower surface of the second circuit board 9 (see FIG. 9).

  By providing the third groove 93, it is possible to position the upper end of the third protective coating 113d of the third coaxial cable 113 above the lower surface of the second circuit board 9 in the z direction.

  Therefore, the third coaxial cable 113 is attached to the second circuit board 9 so that the upper end of the third protective coating 113d is in contact with the lower surface of the second circuit board 9 without providing the third groove 93 (FIG. 10). As compared to the above, it is possible to raise the position of the third inner conductor 113a upward in the z direction and to make the thickness in the z direction including the second circuit board 9 and the third coaxial cable 113 thinner. It is possible to reduce the height of 1.

  Further, as compared with a configuration in which the third coaxial cable 113 is attached to the second circuit board 9 without providing the third groove 93, the upper end of the third protective coating 113 d is in contact with the lower surface of the second circuit board 9. The third inner conductor 113a can be brought close to the second circuit board 9, and the amount of bending of the third inner conductor 113a can be reduced, and the possibility of breakage due to bending can be reduced.

Similarly, in the first coaxial cable 111, a first inner conductor, a first insulator covering the first inner conductor, a first outer conductor covering the first insulator, and a first protective coating 111d covering the first outer conductor Have.
A first sleeve 111c1 is attached to a portion where the first outer conductor is exposed to cover the exposed portion.
When the first coaxial cable 111 (the first sleeve 111c1 covering the first outer conductor) is fitted in the first groove 61, the same effect as in the case where the third coaxial cable 113 is fitted in the third groove 93 is obtained. Can do.

Similarly, the second coaxial cable 112 also includes a second inner conductor, a second insulator covering the second inner conductor, a second outer conductor 112c covering the second insulator, and a second protection covering the second outer conductor 112c. It has a coating 112d.
A second sleeve 112c1 covering the exposed portion is attached to a portion where the second outer conductor 112c is exposed.
The third coaxial cable 113 is fitted in the third groove 93 by the second coaxial cable 112 (the second sleeve 112c1 covering the second outer conductor 112c and the second protective coating 112d) being fitted in the second groove 92 The same effect as in the case can be obtained.

  The sleeves (first sleeve 111c1 to third sleeve 113c1) covering the outer conductor may be omitted.

The metal base 12 is a metal plate for holding the first circuit board 6 and the second circuit board 9, and the first mounting hole 12 a for screwing with the antenna case 2 and the pad 13 is provided in the peripheral portion. A first cable hole 12 b for passing the first coaxial cable 111 to the third coaxial cable 113 up and down is provided at the central portion.
In addition, a temporary fixing member 14 such as a prelock is provided below the metal base 12 and temporarily fixed to the top surface of the vehicle such as a roof via the temporary fixing member 14.

The pad 13 is an annular elastic member formed of an elastomer, rubber or the like, and is fitted into the lower end peripheral portion of the antenna case 2 as a blindfold of a gap between the lower end peripheral portion of the antenna case 2 and the vehicle Function.
A second mounting hole 13 a for screwing with the antenna case 2 and the metal base 12 is provided at the peripheral portion of the pad 13, and the first coaxial cable 111 to the third coaxial cable 113 are provided at the central portion of the pad 13. A second cable hole 13b is provided to pass through the upper and lower sides.

In this embodiment, the GNSS antenna 8, the second antenna element 7 for mobile communication reception using a telephone line, and the first antenna element 4 for mobile communication transmission / reception using a telephone line are provided from the front in the x direction. Be placed.
The frequency bands for mobile phones (700 to 900 MHz band, 1500 to 2700 MHz bands) corresponding to the first antenna element 4 and the second antenna element 7 are compared with the GNSS frequency band (1.5 GHz band) corresponding to the GNSS antenna 8 Frequency band is low.

  For this reason, when the GNSS antenna 8 is disposed in the x direction forward of the first antenna element 4 and the second antenna element 7, the height is increased in the antenna case 2 from the x direction forward to the x direction backward. , The GNSS antenna 8, the second antenna element 7, and the first antenna element 4 can be arranged.

In addition, since the first antenna element 4 is for transmission and reception and the second antenna element 7 is for reception, the first antenna element 4 needs to have a wider band than the second antenna element 7. The antenna element 4 needs to be higher in height in the z direction than the second antenna element 7.
Furthermore, since the first antenna element 4 is also used for transmission, it is necessary to make the distance between the first antenna element 4 and the GNSS antenna 8 as long as possible in order to prevent interference.

  In this embodiment, by arranging the first antenna element 4 behind the second antenna element 7 in the x direction, the height of the antenna case 2 increases from the front in the x direction toward the rear in the x direction. , The GNSS antenna 8, the second antenna element 7, and the first antenna element 4 can be arranged.

DESCRIPTION OF SYMBOLS 1 antenna apparatus 2 antenna case 4 1st antenna element 41 1st protrusion 41a It is a lower end part in the 1st protrusion, Both ends of a longitudinal direction 410 L-shaped claw 420 Notch 4a 1st antenna element holder 6 1st circuit board 61 First groove 6a First hole 7 Second antenna element 71 Second projection 7a Second antenna element holder 8 GNSS antenna 9 Second circuit board 92 Second groove 92a Second sleeve groove (first groove)
92b Groove for second protective cover (second groove)
93 third groove 93a third sleeve groove (first groove)
93b Third protective cover groove (second groove)
9a second hole 10 shield cover 11 coaxial cable 111 first coaxial cable 111c1 first sleeve 111d first protective coating 112 second coaxial cable 112c second outer conductor 112c1 second sleeve 112d second protective coating 113 third coaxial cable 113a first 3 Inner conductor 113b Third insulator 113c Third outer conductor 113c1 Third sleeve 113d Third protective coating 12 Metal base 12a First mounting hole 12b First cable hole 13 Pad 13a Second mounting hole 13b Second cable hole 14 Temporary fixing Element

Claims (6)

An antenna element,
A substrate having a groove,
Equipped with a coaxial cable,
The antenna device, wherein the coaxial cable is fitted in the groove.   The antenna device according to claim 1, wherein the groove is formed at a position away from the peripheral portion of the substrate. The antenna element is provided on the upper surface of the substrate, and the coaxial cable is provided on the lower surface of the substrate;
The antenna element and the coaxial cable are electrically connected;
The antenna device according to claim 1, wherein at least a part of the coaxial cable is fitted in the groove.   The groove has a first groove in which a member covering the outer conductor of the coaxial cable is fitted separately from the coaxial cable, and a second groove in which a member covering the outer conductor in the coaxial cable is fitted. The antenna device according to any one of claims 1 to 3, characterized by A hole is provided in the substrate or a substrate different from the substrate,
It further comprises an antenna element different from the antenna element,
The other antenna element is provided with a rectangular protrusion at its lower end,
Standing on the substrate or the other substrate via the protrusions;
The lower end portion of the protrusion is twisted in a state where the protrusion is inserted into the hole, and the other antenna element is temporarily fixed to the substrate or the other substrate. The antenna apparatus in any one of claim | item 4. A substrate provided with holes,
A rectangular protrusion is provided at the lower end, and an antenna element provided upright on the substrate via the protrusion;
An antenna device characterized in that, in a state where the protrusion is inserted into the hole, the protrusion is twisted to temporarily fix the antenna element to the substrate.

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