WO2022163419A1 - アンテナ装置 - Google Patents
アンテナ装置 Download PDFInfo
- Publication number
- WO2022163419A1 WO2022163419A1 PCT/JP2022/001463 JP2022001463W WO2022163419A1 WO 2022163419 A1 WO2022163419 A1 WO 2022163419A1 JP 2022001463 W JP2022001463 W JP 2022001463W WO 2022163419 A1 WO2022163419 A1 WO 2022163419A1
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- WO
- WIPO (PCT)
- Prior art keywords
- base
- circuit board
- recess
- antenna
- antenna device
- Prior art date
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
- H01Q1/325—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
- H01Q1/3275—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted on a horizontal surface of the vehicle, e.g. on roof, hood, trunk
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/0407—Substantially flat resonant element parallel to ground plane, e.g. patch antenna
Definitions
- the present invention relates to an antenna device.
- Patent Document 1 describes one that uses a metal shield case so that the antenna characteristics are not adversely affected by noise coming from the outside or noise generated from a circuit board.
- This metal shield case has elastic locking pieces protruding from a plurality of locations on the outer peripheral portion. is soldered to the ground trace on the top side of the
- One example of the purpose of the present invention is to suppress the adverse effects of noise on antenna characteristics. Other objects of the present invention will become clear from the description herein.
- An antenna device includes an antenna element, a circuit board having a circuit section, a base provided with a recess covering at least part of the circuit section and functioning as a shield case, the recess and the circuit. contact means for contacting the substrate;
- the function of the shield case can be fully exhibited without deterioration in conduction, and the antenna characteristics due to noise can be reduced. It is possible to suppress the adverse effects of
- FIG. 1 is an exploded perspective view showing the overall configuration of an antenna device according to a first embodiment of the present invention
- FIG. 1 is an external perspective view showing a base of a first example of an antenna device according to a first embodiment of the present invention, (a) shows a base integrated with a concave portion functioning as a shield case; (b) is a side cross-sectional view showing a IIb-IIb line cross-section when the concave portion of the base and the circuit board of (a) are fixed.
- FIG. 4A is an external perspective view showing a base of a second example of the antenna device according to the first embodiment of the present invention; FIG.
- FIG. 4A is an external perspective view showing the base of the third example of the antenna device according to the first embodiment of the present invention, where (a) shows the base integrated with the concave portion functioning as a shield case; ) is a side cross-sectional view showing a cross section taken along line IVb-IVb when the base and the circuit board in (a) are fixed.
- FIG. 4A is an external perspective view showing the base of the third example of the antenna device according to the first embodiment of the present invention, where (a) shows the base integrated with the concave portion functioning as a shield case; ) is a side cross-sectional view showing a cross section taken along line IVb-IVb when the base and the circuit board in (a) are fixed.
- FIG. 4A is an external perspective view showing a base of a fourth example of the antenna device according to the first embodiment of the present invention, where (a) shows the base integrated with a concave portion functioning as a shield case; ) is a side cross-sectional view showing a Vb-Vb line cross-section when the base and the circuit board of (a) are fixed. (a) is an exploded perspective view showing the overall configuration of an antenna device according to a second embodiment of the present invention. (b) is a side sectional view showing a VIb-VIb line section when the base and the circuit board in (a) are fixed.
- FIG. 1 An antenna device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
- FIG. 1 An antenna device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
- FIG. 1 An antenna device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
- FIG. 1 An antenna device according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.
- An antenna device is mounted on, for example, a dashboard or an instrument panel in a vehicle, and relates to a form used in a GNSS (Global Navigation Satellite System) or the like.
- GNSS Global Navigation Satellite System
- Application of the present invention is not limited to this form.
- the application of the antenna is not limited to GNSS.
- FIG. 1 is an exploded perspective view showing the configuration of an antenna unit 101 that constitutes the antenna device according to the first embodiment of the present invention.
- the antenna unit 101 includes a case 2, a circuit board 3, a base 4 having a recess 8 functioning as a shield case, which will be described later, and a patch antenna 5.
- the case 2 is a synthetic resin product made of radio wave transparent synthetic resin.
- the circuit board 3 has a substantially planar shape, and a conductor pattern (not shown) and a semiconductor component (not shown) are mounted on its lower surface.
- the conductor pattern and the semiconductor component correspond to the circuit portion of the present invention (hereinafter, the conductor pattern and the semiconductor component are simply referred to as the circuit portion for explanation).
- the conductor pattern may be mounted on the upper surface of the circuit board 3 .
- a patch antenna 5 is provided as an antenna element on the upper surface of the circuit board 3 .
- the circuit board 3 processes the signals received by the patch antenna 5 through conductor patterns and semiconductor components such as phase shift and synthesis, and transmits the signals to an external device such as a navigation device via a coaxial cable (not shown).
- the base 4 is a metal component having a recess 8 that functions as a shield case.
- the patch antenna 5 is, for example, an antenna for a satellite positioning system capable of receiving signals in the GNSS frequency band, and is attached to the circuit board 3 with a double-sided seal 6 .
- the concave portion 8 provided in the base 4 is formed by forming a convex portion on a metal plate by drawing or the like.
- the height of the projection from the bottom surface of the base 4 is set to a height that does not come into contact with the semiconductor components on the circuit board 3 .
- the concave portion 8 having a concave shape is molded. That is, the recess 8 is molded integrally with the base 4 .
- the recessed portion 8 having a metal recessed shape covers the circuit portion of the circuit board 3 and is electrically connected to the base 4 by the circuit board 3 coming into contact with the entire upper portion 81 of the wall of the projecting portion. It works as a case.
- the concave portion 8 functioning as a shield case is formed integrally with the base 4 , but the concave portion 8 may be formed separately from the base 4 .
- the circuit board 3 is fixed to the base 4 by screwing the eight screws 7A shown in FIG.
- the case 2 is fixed to the base 4 by screwing four screws 7C into four screw holes 7D corresponding to the respective screws 7C provided in the base 4 .
- the circuit board 3 is housed in the internal space formed by fixing the case 2 to the base 4 .
- the eight screw holes 7B of the base 4 into which the screws 7A are screwed when fixing the circuit board 3 rise from the bottom surface of the base 4 and bend in a direction substantially parallel to the bottom surface. provided in the part.
- the height from the bottom surface of the portion rising from the bottom surface of the base 4 is approximately the same as the height of the protrusion in the recess 8 .
- the number of screws 7A and screw holes 7B is not limited to this.
- FIG. 2(a) shows a schematic perspective view of the base 4 as the first example of the antenna unit 101 according to the first embodiment of the present invention
- FIG. 2(b) shows the circuit board 3 and the base 4 fixed together
- FIG. 2B is a sectional view showing the IIb-IIb line section in FIG.
- the hatched lines in FIG. 2B are schematically shown to distinguish between the circuit board 3 (wide hatched lines) and the base 4 (narrow hatched lines).
- a recess 8 is provided in the vicinity of the approximate center of the base 4 and in a portion covering the circuit portion of the circuit board 3 when the circuit board 3 is fixed to the base 4.
- the concave portion 8 has a quadrangular shape in a plan view, and each side of the quadrangular shape is formed by a wall of a convex portion rising from the bottom surface of the base 4 .
- the recess 8 has an internal region surrounded by the walls of the four sides of the quadrilateral protrusion and the bottom surface of the base 4 .
- the upper part 81 of the wall of the convex portion forming each side of the square of the concave portion 8 is formed as a flat surface. In particular, this plane is parallel to the bottom surface of base 4 . Further, a screw hole 82 is provided at the quadrangular vertex portion of the upper portion 81 of the wall of the convex portion of the concave portion 8 . Then, the base 4 having the recess 8 is fixed to the circuit board 3 with the screws 7 . In addition to the apex portion, for example, a screw hole 82 may be provided substantially in the center of the plane of the upper portion 81 of the wall of each convex portion, and the screw 7 may be screwed into the screw hole 82 for fixing.
- the wall of the convex portion forming the periphery of the concave portion 8 rises from the bottom surface of the base 4 so as to be inclined. Then, the entire upper portion 81 of the wall of the projection has a planar shape substantially parallel to the bottom surface of the base 4 .
- the circuit board 3 is fixed to the base 4, the entire plane of the upper portion 81 of the wall of the projection and a portion of the lower surface of the circuit board 3 are brought into close contact. Further, by screwing the screw 7 into the screw hole 82 provided on the flat surface of the upper portion 81, a contact state with increased adhesion is obtained.
- a cavity is formed below the upper portion 81 in the convex portion of the concave portion 8 .
- the upper part 81 of the wall of the projection in the recess 8 and the circuit board 3 can be brought into good contact without any gap. That is, it is possible to improve the contact state with a required contact area, that is, a contact area that ensures sufficient conductivity for suppressing noise. It should be noted that, if only the projections are formed, the projections may warp or vary due to processing or deterioration over time. Furthermore, since a gap is generated between the upper portion 81 of the wall of the projection in the recess 8 and the lower surface of the circuit board 3 , there is a risk that the electrical continuity will be reduced and the shielding function of the recess 8 will be deteriorated.
- the upper part 81 of the wall of the convex portion forming each side of the quadrangle in plan view is flat, and screw holes 82 are provided in the flat to ensure a strong contact with the circuit board 3 . and Therefore, it is possible to suppress the occurrence of warping and variations due to processing and deterioration over time, and to maintain a state in which a required contact area is secured, such as no gap between the recessed portion 8 and the circuit board 3 .
- the concave portion 8 functioning as a shield case and the base 4 are integrally molded, the number of parts can be reduced, and the cost can be reduced.
- the concave portion 8 is rectangular in plan view, but is not limited to this, and may be, for example, circular or elliptical in plan view.
- the concave portion 8 can suppress the influence of external noise on the circuit section and the adverse effect of the noise generated from the circuit section on antenna characteristics and the like.
- the second embodiment relates to a mode in which a leaf spring 9 that contacts the circuit board 3 is provided on the upper portion 81 of the wall of the projection in the recess 8 of the first embodiment. Differences from the above-described first embodiment will be mainly described below.
- FIG. 3(a) shows a perspective view of the base 4 of the second embodiment
- FIG. 3(b) shows a cross section taken along line IIIb-IIIb in FIG. 3(a) when the circuit board 3 is fixed to the base 4.
- 3(c) shows a perspective view of the conductive leaf spring 9 in FIGS. 3(a) and 3(b).
- the hatched lines in FIG. 3B are schematically shown to distinguish between the circuit board 3 (wide hatched lines) and the base 4 (narrow hatched lines).
- a conductive plate is formed on substantially the entire plane of the upper portion 81 of each wall of each projection forming four sides of a square when viewed from above.
- a spring 9 is attached.
- the conductive leaf spring 9 has a fixing portion 91 fixed on the plane of the upper portion 81 of the wall of the projection, and extends obliquely upward from the end portion of the fixing portion 91. It is composed of an extending portion 92 and a bent portion 93 formed by bending the end portion of the extending portion 92 opposite to the fixing portion 91 side.
- the leaf spring 9 has an upward elastic force with respect to the fixing portion 91, and when the top portion of the bent portion 93 is pressed downward from above, a force acts against the elasticity.
- the fixing portion 91 of the leaf spring 9 is fixed to the flat surface of the upper portion 81 of the wall of the convex portion of the concave portion 8 with a conductive double-sided tape or the like.
- the top of the bent portion 93 is configured so that its entirety is substantially parallel to the plane of the upper portion 81 . It should be noted that the portion of the top that contacts the circuit board 3 may be flat (plane contact), or only the curved upper portion may contact (line contact).
- the fixing portion 91 of the conductive leaf spring 9 is fixed on the plane of the upper portion 81 of the convex portion, and the top portion of the bent portion 93 is brought into contact with the circuit board 3.
- the fixing portion 91 of the spring 9 may be fixed to the circuit board 3 so that the top of the bent portion 93 is brought into contact with the plane of the upper portion 81 of the wall of the projection.
- the leaf spring 9 may be fixed to the fixing portion 91 and the circuit board 3 with a conductive double-sided tape, or may be mounted on the circuit board 3 by reflow.
- the mutual contact area can be increased by the reaction force of the leaf spring 9, and the circuit board 3 and the concave portion 8 can be provided with higher conductivity, thereby adversely affecting the antenna characteristics due to noise. can be suppressed.
- the leaf spring 9 it is possible to obtain a required contact area, so it is also possible to reduce the number of screws for fixing the circuit board 3 and the base 4. be. That is, the number of screws can be determined within a range in which a required contact area can be obtained by using the reduced number of screws and the plate spring 9 . As a result, by reducing the number of parts, it is possible to reduce costs, and to suppress product variations and assembly errors during assembly.
- the third embodiment relates to a configuration in which a conductive cushion 10 that contacts the circuit board 3 is provided on the plane of the upper portion 81 of the wall of the projection in the recess 8 of the first embodiment. Differences from the above-described first embodiment will be mainly described below.
- FIG. 4(a) shows a schematic perspective view of the base 4 of the third embodiment
- FIG. 4(b) shows the line IVb-IVb in FIG. 4(a) when the circuit board 3 is fixed to the base 4.
- Fig. 2 shows a cross-sectional view representing a cross-section;
- the hatched lines indicate the conductive cushion 10 (the widest hatched interval), the circuit board 3 (the hatched interval is narrower than the conductive cushion 10 and wider than the base 4), and the base 4 (hatched line). is shown schematically in order to distinguish from the narrowest interval).
- a conductive cushion 10 having elasticity is attached to substantially the entire plane of the upper portion 81 of the wall of each convex portion in the concave portion 8 .
- the conductive cushion 10 includes a fixing portion 111 fixed on the plane of the upper portion 81 of the wall of the convex portion, an upper surface 112 in contact with the circuit board 3, and the fixing portions 111. It consists of sides 113 extending between the .
- the conductive cushion 10 configured in this manner has an upward elastic force with respect to the upper surface 112 and a downward elastic force with respect to the fixing portion 111, and resists the elasticity when the whole is pressed downward from above. force works.
- the fixing portion 111 of the conductive cushion 10 is fixed to the plane of the upper portion 81 of the wall of the convex portion of the concave portion 8 with double-sided tape or the like.
- the upper surface 112 is configured to be substantially parallel to the plane of the upper portion 81 .
- the circuit board 3 When the circuit board 3 is fixed to the base 4 , the upper surface 112 of the conductive cushion 10 is in close contact with part of the lower surface of the circuit board 3 .
- the circuit board 3 When the circuit board 3 is screwed onto the base 4 using the screws 7, the circuit board 3 presses the conductive cushion 10 downward. Then, a force resisting the pressing force acts on the conductive cushion 10, and the upper surface 112 and a part of the lower surface of the circuit board 3 come into contact with each other with increased adhesion.
- the mutual contact area can be increased by the reaction force of the conductive cushion 10, and a higher conductivity between the circuit board 3 and the recess 8 can be obtained, thereby suppressing the adverse effect of noise on the antenna characteristics and the like. It becomes possible.
- the conductive cushion 10 As described above, by providing the conductive cushion 10, it is possible to obtain a required contact area, so it is also possible to reduce the number of screws for fixing the circuit board 3 and the base 4. is. That is, the number of screws can be determined within a range in which the required contact area can be obtained using the reduced number of screws and the conductive cushion 10 . As a result, by reducing the number of parts, it is possible to reduce costs, and to suppress product variations and assembly errors during assembly.
- FIG. 5 a description will be given of a fourth embodiment of the configuration in which the circuit board 3 is brought into contact with the concave portion 18 functioning as a shield case formed separately from the base 4.
- FIG. 5 relates to a base 4 having a recess 18 formed separately from the base 4, unlike the recesses 8 of the first to third embodiments described above.
- FIG. 5(a) shows a schematic perspective view of the base 4 having the recess 18 of the fourth embodiment
- FIG. 5(b) shows Vb in FIG. 5(a) when the circuit board 3 is fixed to the base 4.
- FIG. A cross-sectional view showing a -Vb line cross-section is shown. Note that the hatched lines in FIG. 5(b) are schematically shown to distinguish between the circuit board 3 (wide hatched lines), the base 4 (narrow hatched lines), and the sheet metal recess 18 therebetween. It is a thing.
- the recess 18 of the fourth embodiment is not formed integrally with the base 4, but is manufactured as an independent component and welded to the base 4. be.
- the recess 18 has a bottom portion 181 that contacts the base 4, a side portion 182 that rises in a direction substantially perpendicular to the bottom portion and is fixed to the base 4 by welding, and a plane portion 183 extending in a direction substantially perpendicular to the side portion 182 and in contact with the circuit board 3 .
- the concave portion 18 has a box shape manufactured by sheet metal processing, and the flat portion 183 is bent at right angles to the side portions 182 to form the flat portion 183 which is a flat portion for conducting with the circuit board 3 . . By manufacturing in this way, the desired shape can be easily obtained only by metal sheet processing without the need for drawing.
- the bottom portion 181 has a large contact area with the base 4, and the plane portion 183 is a plane substantially parallel to the plane of the base 4. Therefore, it is possible to secure a sufficient contact area with the lower surface of the circuit board 3, obtain higher conductivity between the circuit board 3 and the recess 18, and suppress adverse effects of noise on the antenna characteristics.
- the plate spring 9 described in the second embodiment or the conductive cushion described in the third embodiment may be attached to the flat portion 183 . By doing so, the same effects as those of the second and third embodiments can be obtained.
- the recess 18 is welded to the base 4, but this is not restrictive.
- a hole may be provided, and the circuit board 3, the recess 18 and the base 4 may be integrally fastened with a screw.
- the antenna device according to the second embodiment of the present invention relates to the form of a shark fin antenna device mounted on the roof of a vehicle.
- This antenna device is a compound antenna device having a plurality of antennas.
- FIG. 6(a) is an exploded perspective view showing the configuration of an antenna unit 101A that constitutes the antenna device according to the second embodiment of the present invention.
- the antenna unit 101A includes a case 102, a circuit board 11, a base 12 having a recess 28 functioning as a shield case, which will be described later, two patch antennas 50 and 51, and a TEL antenna 52.
- the case 102 is a shark fin-shaped synthetic resin product made of radio wave transparent synthetic resin or the like.
- the circuit board 11 has a substantially planar shape, and a conductor pattern (not shown) and a semiconductor component (not shown) are mounted on its lower surface.
- the conductor pattern and the semiconductor component correspond to the circuit portion of the present invention (hereinafter, the conductor pattern and the semiconductor component are simply referred to as the circuit portion for explanation).
- the conductor pattern may be mounted on the upper surface of the circuit board 11 .
- Two patch antennas 50 and 51 and a TEL antenna 52 are provided as antenna elements on the upper surface of the circuit board 11 .
- the circuit board 11 processes the individual signals received by the patch antennas 50, 51 and the TEL antenna 52 through conductor patterns and semiconductor parts, such as phase shift and synthesis, and transmits them through a coaxial cable (not shown). Transmit to an external device such as a navigation device.
- the base 12 is a metal part having two recesses 28 that function as a shield case.
- the patch antenna 50 is an antenna for SDARS (Satellite Digital Audio Radio Service), which is a satellite digital audio radio service capable of receiving signals in the SDARS frequency band.
- the patch antenna 51 is a GNSS antenna and is a satellite positioning system capable of receiving signals in the GNSS frequency band.
- These patch antennas 50 and 51 are attached to the circuit board 11 by seals or the like.
- the TEL antenna is attached to the circuit board 11 by crimping and soldering the terminals of the TEL antenna, for example.
- Each of the two recesses 28 provided in the base 12 is configured by a rib erected from the bottom surface of the base 12 by cutting or the like.
- the height of the rib from the bottom surface of the base 12 is set to a height that does not come into contact with the semiconductor components of the circuit board 11, and the rib is formed so as to surround the area where the circuit portion of the circuit board 11 exists, thereby forming a concave shape.
- a recess 28 is molded.
- the recess 28 is molded integrally with the base 12.
- the concave portion 28 made of metal functions as a shield case that covers the circuit portion of the circuit board 11 and is electrically connected to the base 12 by the circuit board 11 coming into contact with the entire upper portion 81A of the rib.
- the recess 28 functioning as a shield case is integrally formed with the base 12, but these two recesses 28 may be separate from the base 12, or one of them may be separate. .
- the circuit board 11 is fixed to the base 12 by screwing seven screws 7A shown in FIG. 6A into seven screw holes 7B corresponding to the screws 7A provided in the base 12.
- the case 102 is fixed to the base 12 by engaging a locking claw (not shown) with an engaging portion (not shown) provided on the base 12 .
- the circuit board 11, the patch antennas 50 and 51, and the TEL antenna 52 are accommodated in the internal space formed by fixing the case 102 to the base 12.
- the five screw holes 7B of the base 12, into which five of the seven screws 7A are screwed when fixing the circuit board 11 to the base 12, are replaced by patch antennas 50 and 51, as shown in FIG. is provided in the vicinity of The numbers of screws 7A and screw holes 7B are not limited to these.
- FIG. 6B shows a cross-sectional view of the recess 28 located below the patch antenna 51 among the two recesses 28 .
- the hatched lines in FIG. 6B are schematically shown to distinguish between the circuit board 11 (wide hatched lines) and the base 12 (narrow hatched lines).
- the concave portion 28 is rectangular in plan view, and has an internal region surrounded by the ribs on the four sides of the rectangular shape and the bottom surface of the base 12 .
- the upper portion 81A of the rib forming each side of the rectangle of the recess 28 is formed as a flat surface. This plane is substantially parallel to the bottom surface of the base 12 .
- the five screw holes 7B described above are positioned near the ends of the ribs when the circuit board 11 is fixed to the base 12, and the entire upper plane of the ribs and part of the lower surface of the circuit board 11 are in close contact.
- a contact state with increased adhesion is obtained.
- a screw hole may be provided in the flat surface of the upper portion 81A of the rib, and the screw may be screwed therewith.
- the upper portion of the rib in the concave portion 28 and the circuit board 11 can be brought into good contact without any gap. That is, a good contact state can be achieved with a required contact area, that is, a contact area that ensures sufficient conductivity to suppress adverse effects of noise on the antenna characteristics.
- the base 12 of the second embodiment may be made of die-cast or plated resin.
- the base 12 which was a metal cutting part in the above embodiment, can be manufactured by casting, making it easier to manufacture and reducing costs.
- the shape of the resin before being plated can be made into a desired shape at once by molding the resin by injection molding or the like. Manufacture becomes easy after all.
- an antenna element a circuit board having a circuit portion, a base provided with a concave portion that covers at least a portion of the circuit portion and functions as a shield case, and the concave portion and the circuit board are brought into contact with each other. and contact means for bringing the antenna device into contact.
- the contact means may have a screw hole provided in the recess and a screw that is screwed into the screw hole.
- a portion of the recess that contacts the circuit board may be a flat surface substantially parallel to the bottom surface of the base.
- the recess may be integrally molded with the base.
- the number of parts can be reduced, and the cost can be reduced.
- the contact means may have a leaf spring provided in the recess.
- the contact means may have a conductive cushion provided in the recess.
- the mutual contact area between the circuit board and the circuit board can be increased by the reaction force of the plate spring and the reaction force of the conductive cushion. can be suppressed.
- the base may be made of die-cast or plated resin.
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Abstract
Description
図1~図5を用いて本発明の第1実施形態におけるアンテナ装置について説明する。
本発明の第1実施形態に係るアンテナ装置は、例えば、車両内のダッシュボードやインパネに搭載され、GNSS(Global Navigation Satellite System)などに用いられる形態に関する。なお、本発明の適用はこの形態に限られない。例えば、アンテナの用途がGNSSに限定されないことは以下の説明からも明らかである。
図2を用いて、ベース4と一体に成形されたシールドケースとして機能する凹部8と回路基板3とを接触させる構成の第1実施例について説明する。
図3を用いて、ベース4と一体に成型されたシールドケースとして機能する凹部8と回路基板3とを接触させる構成の第2実施例について説明する。
図4を用いて、ベース4と一体に成型されたシールドケースとして機能する凹部8と回路基板3とを接触させる構成の第3実施例について説明する。
図5を用いて、ベース4と別体に成形されたシールドケースとして機能する凹部18と回路基板3とを接触させる構成の第4実施例について説明する。なお、この第4実施例は、上述した第1実施例~第3実施例の凹部8とは相違し、ベース4とは別体で構成された凹部18を有するベース4に関する。
図6を用いて、本発明の第2実施形態におけるアンテナ装置について説明する。
本発明の第2実施形態におけるアンテナ装置は、車両のルーフ上に装着されるシャークフィン型アンテナ装置の形態に関する。このアンテナ装置は、複数のアンテナを搭載した複合アンテナ装置である。
図6(a)に示すように、ベース12の略中央付近と略前方付近には、回路基板11をベース12に固定したときに、回路基板11における回路部を覆う部分に、2つの凹部28が設けられている。図6(b)は、2つの凹部28のうち、パッチアンテナ51の下側に位置する凹部28の断面図を示している。なお、図6(b)における斜線は、回路基板11(斜線の間隔が広い)とベース12(斜線の間隔が狭い)とを区別するために模式的に示したものである。凹部28は、平面視で四角形であり、この四角形の四辺のリブとベース12の底面によって囲まれた内部領域を有する。そして、この凹部28の内部領域に回路基板11の下面側の回路部を収容することで、例えば、回路部から発生するノイズによるアンテナ特性などへの悪影響を抑制している。
上述した実施形態による本明細書の開示は、次のように概括することができる。
3、11 回路基板
4、12 ベース
5 パッチアンテナ
6 両面シール
7、7A、7C 螺子
7B、7D 螺子穴
8、18、28 凹部
9 板バネ
10 導電性クッション
50 SDARS用アンテナ
51 GNSS用アンテナ
52 TELアンテナ
81、81A 凸部の壁の上部
82 螺子穴
91 固定部
92 延在部
93 屈曲部
100 アンテナ装置
101、101A アンテナユニット
111 固定部
112 上面
113、182 側部
181 底部
183 平面部
Claims (7)
- アンテナエレメントと、
回路部を有する回路基板と、
前記回路部の少なくとも一部を覆い、シールドケースとして機能する凹部が設けられたベースと、
前記凹部と前記回路基板と、を接触させるための接触手段と、
を備えたことを特徴とするアンテナ装置。 - 前記接触手段は、前記凹部に設けられた螺子穴と前記螺子穴に螺合する螺子を有することを特徴とする、請求項1に記載のアンテナ装置。
- 前記凹部は、前記回路基板と接触する箇所が前記ベースの底面に略平行な平面であることを特徴とする、請求項1または2のいずれか一項に記載のアンテナ装置。
- 前記凹部は、前記ベースに一体成型されることを特徴とする、請求項1から3のいずれか一項に記載のアンテナ装置。
- 前記接触手段は、前記凹部に設けられた板バネを有することを特徴とする、請求項1、3、または4のいずれか一項に記載のアンテナ装置。
- 前記接触手段は、前記凹部に設けられた導電性クッションを有することを特徴とする、請求項1、または3から5のいずれか一項に記載のアンテナ装置。
- 前記ベースが、ダイキャストまたはめっきを施された樹脂よりなることを特徴とする、請求項1から6のいずれか一項に記載のアンテナ装置。
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CN202280011317.8A CN116745995A (zh) | 2021-01-26 | 2022-01-17 | 天线装置 |
EP22745642.3A EP4287404A1 (en) | 2021-01-26 | 2022-01-17 | Antenna device |
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JP2021010611A JP2022114344A (ja) | 2021-01-26 | 2021-01-26 | アンテナ装置 |
JP2021-010611 | 2021-01-26 |
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EP (1) | EP4287404A1 (ja) |
JP (1) | JP2022114344A (ja) |
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0514044A (ja) * | 1990-06-04 | 1993-01-22 | Nippon Telegr & Teleph Corp <Ntt> | マイクロストリツプアンテナ及びマイクロストリツプアンテナ付筐体 |
JPH09205305A (ja) * | 1996-01-26 | 1997-08-05 | Fuji Elelctrochem Co Ltd | アンテナ装置の同軸ケーブル接続構造 |
JP4323440B2 (ja) | 2005-02-10 | 2009-09-02 | アルプス電気株式会社 | アンテナ装置 |
WO2018105235A1 (ja) * | 2016-12-06 | 2018-06-14 | 株式会社ヨコオ | アンテナ装置 |
-
2021
- 2021-01-26 JP JP2021010611A patent/JP2022114344A/ja active Pending
-
2022
- 2022-01-17 CN CN202280011317.8A patent/CN116745995A/zh active Pending
- 2022-01-17 WO PCT/JP2022/001463 patent/WO2022163419A1/ja active Application Filing
- 2022-01-17 EP EP22745642.3A patent/EP4287404A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0514044A (ja) * | 1990-06-04 | 1993-01-22 | Nippon Telegr & Teleph Corp <Ntt> | マイクロストリツプアンテナ及びマイクロストリツプアンテナ付筐体 |
JPH09205305A (ja) * | 1996-01-26 | 1997-08-05 | Fuji Elelctrochem Co Ltd | アンテナ装置の同軸ケーブル接続構造 |
JP4323440B2 (ja) | 2005-02-10 | 2009-09-02 | アルプス電気株式会社 | アンテナ装置 |
WO2018105235A1 (ja) * | 2016-12-06 | 2018-06-14 | 株式会社ヨコオ | アンテナ装置 |
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JP2022114344A (ja) | 2022-08-05 |
CN116745995A (zh) | 2023-09-12 |
EP4287404A1 (en) | 2023-12-06 |
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