WO2015118939A1 - アンテナ装置 - Google Patents
アンテナ装置 Download PDFInfo
- Publication number
- WO2015118939A1 WO2015118939A1 PCT/JP2015/051361 JP2015051361W WO2015118939A1 WO 2015118939 A1 WO2015118939 A1 WO 2015118939A1 JP 2015051361 W JP2015051361 W JP 2015051361W WO 2015118939 A1 WO2015118939 A1 WO 2015118939A1
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- WIPO (PCT)
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- case
- inner case
- antenna device
- antenna
- antenna element
- Prior art date
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
- H01Q1/1214—Supports; Mounting means for fastening a rigid aerial element through a wall
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
Definitions
- the present invention relates to an antenna device having a double case structure standing on a vehicle roof.
- the antenna unit disclosed in Patent Document 1 is configured such that an antenna element is housed in a space formed by a base and an inner case with water tightness, and the inner case is covered with an outer case that matches the body color. Is done.
- the height of the antenna device protruding from the vehicle roof is limited to about 70 [mm] or less due to restrictions on protrusions from the vehicle.
- an antenna device that receives an AM / FM band it is necessary to arrange an antenna element as high as possible in order to ensure electrical performance. Therefore, under conditions where the height is limited to about 70 mm or less. Cannot ensure sufficient electrical performance.
- the area of the antenna element accommodated in a narrow space is as wide as possible and arranged at a high position. The ingenuity is given.
- the antenna substrate on which the antenna pattern is formed is erected from the base, and the top portion is arranged so as to straddle the antenna substrate, and the top portion and the antenna pattern constitute a composite antenna element. Yes.
- the low-profile antenna device described in Patent Document 2 has a double case structure like the antenna device described in Patent Document 1, the antenna element is accommodated inside the inner case. Therefore, compared with a single case, the accommodation space is narrowed by the doubled amount.
- Patent Document 1 there is no problem when using a patch antenna that is designed to be small and small.
- Patent Document 2 the electrical performance of receiving the AM / FM band is obtained.
- the antenna element arrangement position becomes low and the area becomes small.
- the structure for supporting the antenna element is complicated, and there is a problem that the manufacturing cost cannot be reduced. It is an object of the present invention to provide an antenna device that can simplify the structure of a standing-type double case structure while preventing deterioration of antenna performance.
- An antenna device is an antenna device installed at a predetermined portion of a vehicle body, and includes a three-dimensional inner case in which an accommodation space for accommodating an electronic component is formed, and an outer covering the inner case. And a case. The height from the vehicle body to the highest part of the outer case is less than 70 [mm].
- An antenna element is interposed between the outer surface of the inner case and the inner surface of the outer case, and the antenna element is housed in the housing space while maintaining the water tightness of the housing space inside the inner case. It is electrically connected to electronic components.
- the antenna element is formed in a substantially planar shape along the shape of the outer surface of the inner case or the inner surface of the outer case.
- a watertight connector is provided to electrically connect the antenna element to an electronic component housed in the housing space while maintaining the watertightness of the housing space inside the inner case.
- the watertight connector includes an outer terminal exposed on the outer surface of the inner case, and an inner terminal exposed to the inner surface of the inner case while being electrically connected to the outer terminal and maintaining the watertightness of the accommodation space inside the inner case. It is what you have.
- This watertight connector is embedded in the case body of the inner case, for example.
- the antenna element is interposed between the outer surface of the inner case and the outer case, and the antenna element is electrically connected to the electronic components in the accommodating space while maintaining the water tightness of the accommodating space inside the inner case. Connected to. Therefore, it is possible to achieve a cost reduction while preventing a decrease in antenna performance when a single case structure of the same size is used even though the double case structure has a height restriction.
- FIG. 1 is an external perspective view of an antenna device according to a first embodiment.
- (A) is the back surface explanatory drawing of the inner case which shows the attachment state of a coil element
- (b) is the external appearance perspective view.
- FIG. 1 is an external perspective view of the antenna device according to the first embodiment
- FIG. 2 is a cross-sectional structure explanatory view
- FIG. 3 is an exploded perspective view.
- the antenna device 1 of this embodiment is an antenna device that mainly receives AM and FM bands, and is watertightly attached to a base 10, a circuit board 11 on which an electronic circuit such as an amplifier is mounted, a coil element 12, and a base 10.
- the double case structure includes an inner case 13, an antenna element 14, and an outer case 15 that covers the inner case 13.
- the outer case 15 has a three-dimensional shape that protrudes upward at a height within 70 [mm] from the vehicle roof 20 that is an example of a mounting surface. For example, it has a shark fin type shape in which the upper front end is the lowest and the upper rear end is the highest.
- the outer case 15 is a radio wave transmitting member such as a resin, and is painted in accordance with the vehicle body color.
- the inner case 13 includes a zenith portion 131 that is substantially similar to the shape of the inner surface of the outer case 15, a hollow portion 132 formed in a part of the zenith portion 131, and a side wall portion 133 that is connected to the zenith portion 131. It is hollow.
- the edge of the inner case 13 is attached to the base 10 via the elastic pad 17. As a result, an accommodation space S for accommodating electronic components and the like is formed between the upper surface of the base 10 and the inside of the inner case 13.
- the inner case 13 is made of resin, for example.
- the zenith part 131 of the inner case 13 is formed from the upper end of the inner case 13 to a predetermined height position.
- the “predetermined height position” is a position at which the antenna element 14 disposed on the zenith portion 131 described later can secure antenna characteristics.
- a hole 134 that accommodates a tongue piece 142 of the antenna element 14 to be described later is formed at the base of the zenith portion 131.
- two convex portions 135 extending upward from the lower end are formed on one side.
- the base 10 serves as a base for the inner case 13 and the outer case 15 and serves as a mounting base for the vehicle body roof 20, and is composed of aluminum die casting, zinc die casting or the like. In addition to the recess for accommodating the elastic pad 17, the base 10 protrudes below the vehicle body roof 20 to electrically connect the electronic circuit mounted on the circuit board 11 and the electronic device in the vehicle body.
- the connector mechanism 18 is provided.
- the circuit board 11 has a conductive terminal (not shown) that is electrically connected to the electronic circuit, and the conductive terminal and the electronic component on the board are electrically connected.
- a conductive terminal 111 is provided on the surface of the circuit board 11 on the inner case 13 side.
- the terminal 111 is a kind of metal fitting having a bifurcated portion, and electrically connects the U-shaped piece 123 and the conductive terminal of the circuit board 11 while elastically supporting a U-shaped piece 123 of the coil element 12 described later.
- the bifurcated portion is formed by bending a band-shaped metal plate into an M shape to form two protrusions (bifurcated). Both ends of the M-shaped bifurcated portion are inserted and fixed on the conductive terminals of the circuit board 11. Thereby, the conductive terminal of the circuit board 11 and the terminal 111 are electrically connected.
- the coil element 12 includes a cylindrical helical coil 121 for impedance adjustment, a thin plate-shaped joint plate 122 that conducts to one end of the helical coil 121, and a U-shaped piece 123 that conducts to the other end of the helical coil 121. And have.
- the helical coil 121, the base portion of the joint plate 122, and the base portion of the U-shaped piece 123 are each molded by resin.
- a portion where the helical coil 121 is molded is referred to as a coil support portion 125, a portion where the base portion of the joint plate 122 is molded is referred to as a front support portion 126, and a portion where the base portion of the U-shaped piece 123 is molded is referred to as a rear support portion 127.
- the coil support part 125 is also formed in a cylindrical shape.
- a mounting hole 128 for fixing the coil element 12 to a predetermined portion of the inner wall of the inner case 13 is formed in each of the front support portion 126 and the rear support portion 127.
- the joint plate 122 is formed, for example, by bending a metal plate having both ends into a substantially Z shape and providing a through hole 122a at one end thereof.
- the through hole 122 a is disposed at a position that substantially coincides with the central axis of the hollow portion of the coil support portion 125.
- the U-shaped piece 123 is inserted into the central portion of the bifurcated portion of the terminal 111 and is elastically clamped.
- the antenna element 14 is formed in a shape substantially similar to the shape of the surface excluding the rear surface of the zenith 131, and the zenith 131 of the inner case 13 is interposed between the inner case 13 and the inner surface of the outer case 15. It is arranged. Then, the watertight connector 16 is electrically connected to the coil element 12 while maintaining the watertightness of the accommodation space S.
- the detailed structure of the watertight connector 16 that enables such connection will be described later.
- the antenna element 14 is made of SUS (Stainless Steel) to suppress corrosion.
- SUS Stainless Steel
- the cross-sectional shape is formed in a substantially inverted U shape.
- the present invention is not limited to this example, and the antenna element 14 may be configured by forming a linear SUS in a net shape.
- the height of the antenna element 14 from the vehicle roof 20 is desirably as high as possible in order to prevent deterioration of the antenna performance. In the case of the present embodiment, the height from the vehicle roof 20 to the highest portion of the antenna element 14 is 65 [mm].
- the antenna element 14 is also formed with a through hole 141 for electrical connection with the watertight connector 16. Further, five tongue pieces 142 project downward from the edge. The tongue piece 142 is inserted into a hole 134 formed at a corresponding portion of the inner case 13. The tongue piece 142 is provided to prevent the antenna element 14 from being peeled off from the inner case and to elastically contact the convex portion 135 of the zenith portion 131 on the inner surface of the antenna element.
- the watertight connector 16 has a common bottom portion and a pair of openings that open in opposite directions, and the bottom portion is a bottomed cylindrical conductive member that blocks the accommodation space S and the space around the outer surface of the inner case 13. It is comprised including a member. Thread grooves are threaded on the inner walls of the pair of openings.
- the one opening is the outer terminal 161 exposed on the outer surface of the inner case 13.
- the other opening is exposed to the accommodation space S and becomes an inner terminal 162 that is electrically connected to the outer terminal 161 while maintaining the water tightness of the accommodation space S.
- the outer terminal 161 also serves as a mounting mechanism for the antenna element 14. That is, by screwing a metal male screw through the through hole 141 of the antenna element 14, the antenna element 14 is sandwiched between the head of the male screw and the outer terminal 161, and the antenna element 14 and the watertight connector 16 Can be electrically connected.
- the inner terminal 162 also serves as an attachment mechanism for the helical coil 121. In other words, by screwing a male male screw through the through hole 122a of the joint plate 122 of the coil element 12, the joint plate 122 that is electrically connected to the helical coil 121 is sandwiched between the head of the male screw and the inner terminal 162. The watertight connector 16 and the helical coil 121 can be electrically connected.
- the outer peripheral part of the bottom part in the middle of both openings of the watertight connector 16 is a protrusion 163 having a diameter larger than that of the pair of openings.
- the watertight connector 16 having such a structure is embedded in the case body so that the opening is exposed by insert molding.
- the protrusions 163 prevent the embedded watertight connector 16 from coming out of the inner case 13 and further ensure the watertightness of the accommodation space S.
- the antenna device 1 is first assembled from a portion excluding the outer case 15. The worker first attaches the terminal 111 to the circuit board 11, and then attaches the circuit board 11 to the base 10. Further, the antenna element 14 is attached to the zenith portion 131 of the inner case 13. The antenna element 14 is attached to the zenith portion 131 by inserting the five tongue pieces 142 of the antenna element 14 into the attachment holes 134 of the inner case 13 and then inserting a male screw from the through hole 141 to the outer terminal 161 of the watertight connector 16. This is done by screwing.
- the convex portion 135 of the zenith portion 131 elastically contacts the inner surface of the antenna element 14, even if the vehicle body (vehicle roof) and the antenna device 1 vibrate due to traveling of the vehicle, the antenna element 14 is removed from the inner case 13. None leave.
- the coil element 12 is screwed and fixed to a predetermined portion of the inner wall of the inner case 13 through a pair of attachment holes 128 formed in the front support portion 126 and the rear support portion 127. Then, the male screw is screwed into the inner terminal 162 of the watertight connector 16 through the through hole 122a of the joint plate 122 visible from the hollow portion of the coil portion 125. Thereafter, as shown in FIG. 3, the inner case 13 is attached to the elastic pad 17 on the base 10 and fixed with screws. When the inner case 13 is attached to the base 10, the U-shaped piece 123 of the rear support portion 127 of the coil element 12 is inserted and held in the terminal 111 on the circuit board 11. Note that the antenna element 14 may be attached to the inner case 13 last.
- FIG. 5 is an external perspective view of the assembly assembled in this manner.
- the antenna device 1 is completed by covering the assembly with the outer case 15.
- the outer case and the assembly are assembled by engaging a claw provided on the outer case (not shown) with a predetermined portion of the base 10.
- the base 10 and the inner case 13 are elastically joined via the elastic pad 17 and the watertightness is maintained and the antenna element 14 and the helical coil 121 and the like are passed through the watertight connector 16. Electrically connected. Therefore, even if the watertightness between the outer case 15 and the assembly is not sufficient, the electronic circuit in the accommodation space S is not affected, so that the manufacturing process is greatly simplified.
- FIG. 6 is an FM band sensitivity characteristic comparison diagram, where the horizontal axis represents frequency and the vertical axis represents sensitivity (dB).
- FIG. 7 is a sensitivity characteristic comparison diagram of the AM band, and the vertical axis represents sensitivity (dB).
- Each “outer” represents a change in sensitivity when the antenna element 14 is arranged outside the inner case 13, and “inner” represents a change in sensitivity when arranged inside. In any case, the sensitivity was improved by arranging the antenna element 14 at the zenith 131 of the inner case 13 as in the present embodiment.
- the antenna element 14 is arranged at the zenith portion 131 of the inner case 13, so that the single case having the same shape and size is formed while having a double case structure.
- the area and height equivalent to the antenna element of the antenna device having the structure can be ensured. Therefore, it is possible to prevent deterioration of the antenna performance when the double case structure is used. Further, the shape and area of the antenna element 14 can be flexibly changed according to the shape of the outer surface of the inner case 13.
- the antenna element 14 can be attached to the inner case 13 simply by inserting the five tongue pieces 142 into the holes 134 of the inner case 13 and screwing them with male screws across the through hole 141. Moreover, since it is electrically connected to the helical coil 121 through the joint plate 122, the antenna element 14 can be attached to the antenna device 1 without providing a dedicated support member. Also, the replacement work of the antenna element 14 becomes extremely easy. Therefore, the manufacturing process of the antenna device 1 or the maintenance process of the antenna element 14 after manufacturing is significantly simplified as compared with the case of the antenna device having the conventional structure.
- the watertight connector 16 is embedded in the inner case 13 and the antenna element 14 and the joint plate 122 are electrically connected using the watertight connector 16. Therefore, even when the antenna element 14 is disposed on the outer surface of the inner case 13, the water tightness of the accommodation space S of the inner case 13 can be easily ensured.
- the helical coil 121, the base of the joint plate 122 that conducts to one end of the helical coil 121, and the base of the U-shaped piece 123 that conducts to the other end of the helical coil 121 are molded with resin.
- the coil element 12 was configured.
- This coil element 12 is modularized so that it can be incorporated into the antenna device 1 only by screwing or mounting the U-shaped piece 123 to the terminal 111. Therefore, the assembly process is simplified and mass production is facilitated as compared with the conventional antenna device of this type.
- connection between the outer terminal 161 of the watertight connector 16 and the through hole 141 of the antenna element 14 and the inner terminal 162 of the watertight connector 16 and the through hole 122a of the joint plate 122 are screwed in with a male screw.
- these connections may be made by engaging the pin member.
- the antenna element 14 was one and the helical coil 121 and the coil part 125 of the coil element 12 showed the example of a cylindrical shape, embodiment of this invention shows such an example. It is not limited to examples.
- the second embodiment an example is shown in which there are two antenna elements and a module is formed by forming a coil on a substrate. A substrate formed on the substrate is referred to as a coil substrate. This coil substrate is erected on the circuit substrate 11 described in the first embodiment. Note that providing two antenna elements means that electromagnetic waves in different frequency bands can be received.
- FIG. 8 is an exploded perspective view of the antenna device 2 according to the second embodiment.
- the double case structure is the same as the antenna device 1 according to the first embodiment. That is, also in the second embodiment, the outer case 15 described in the first embodiment is used.
- the antenna device 2 includes a first antenna element 24a and a second antenna element 24b. Therefore, two watertight connectors 26a and 26b are embedded in the inner case 23.
- the individual watertight connectors 26a and 26b are the same as the watertight connector 16 described in the first embodiment.
- the first antenna element 24a is electrically connected to the outer terminal of the watertight connector 26a
- the second antenna element 24b is electrically connected to the outer terminal of the watertight connector 26b.
- the inner terminal of the watertight connector 26a is electrically connected to the first joint plate 221a, and the inner terminal of the watertight connector 26b is electrically connected to the second joint plate 221b.
- the first joint plate 221a and the second joint plate 221b are attached to the inner case 23 by male screws, respectively.
- the antenna device 2 is configured to hold the coil substrate 223 with a holder 222 and fix the holder 222 to a predetermined portion of the inner wall of the inner case 23.
- the coil substrate 223 When fixed to the inner case 23, the coil substrate 223 is disposed in a direction perpendicular to the circuit substrate 11.
- the coil substrate 223 includes a first contact 223a that conducts with the first joint plate 221a when the holder 222 is fixed to the inner case 23, a second contact 223b that conducts with the second joint plate 221b, and a circuit board side (not shown)
- a third contact 223c and a fourth contact 223d are provided which are electrically connected to the terminal (having the same structure as the terminal 111 described in the first embodiment).
- the first contact 223a provided on the coil substrate 223 is electrically connected to one end of the first coil (not shown), and the third contact 223c is electrically connected to the other end of the first coil.
- the second contact 223b provided on the coil substrate 223 is electrically connected to one end of a second coil (not shown), and the fourth contact 223d is electrically connected to the other end of the second coil.
- the two antenna elements 24 a and 24 b are provided on the outer surface of one inner case 23.
- the first antenna element 24a and the first coil of the coil substrate 223 erected inside the inner case 23, and the second antenna element 24b and the second coil of the coil substrate 223 are held in a watertight manner while keeping the storage space watertight. It was made to conduct. Therefore, as in the case of the first embodiment, the antenna device 2 receives electromagnetic waves in a plurality of frequency bands without degrading the antenna performance as compared with the case of the single case structure, although it has a double case structure. Can do. Further, since the antenna elements 24a and 24b and the coil substrate 223 can be attached to the inner case 23 simply by screwing, the manufacturing process is simplified.
- the example in which the antenna elements 14, 24 a, 24 b are arranged on the outer surface of the inner cases 13, 23 has been shown, but it may be provided on the inner wall of the outer case 15. good.
- the watertight connectors 16, 26a, 26b and the antenna elements 14, 24a, 24b may be electrically connected by feeder wires.
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Abstract
Description
さらに、アンテナエレメントを支持するための構造も複雑となり、製造コストを下げることができないという問題もある。
本発明は、立設型の2重ケース構造であっても、アンテナ性能の劣化を防止しつつ、その構造も簡略にすることができるアンテナ装置を提供することを目的とする。
前記インナーケースの外表面と前記アウターケースの内表面との間にアンテナエレメントが介在し、このアンテナエレメントが、前記インナーケース内側の前記収容空間の水密性を維持しながら収容空間に収容された前記電子部品と電気的に接続されている。
アンテナエレメントは、例えば、インナーケースの外表面又はアウターケースの内表面の形状に沿って略面状に形成されている。アンテナエレメントを、インナーケース内側の収容空間の水密性を維持しながら収容空間に収容された電子部品と電気的に接続するため、水密接続具が設けられる。この水密接続具は、インナーケースの外表面に露出する外側端子と、前記外側端子と導通し、インナーケース内側の収容空間の水密性を維持しつつインナーケースの内表面に露出する内側端子とを有するものである。この水密接続具は、例えばインナーケースのケース本体に埋設される。
[第1実施形態]
<全体構成>
図1は、第1実施形態に係るアンテナ装置の外観斜視図、図2は断面構造説明図、図3は分解斜視図である。
この実施形態のアンテナ装置1は、主として、AMおよびFM帯を受信するアンテナ装置であって、ベース10、増幅器等の電子回路を実装した回路基板11、コイルエレメント12、ベース10に水密に取り付けられるインナーケース13、アンテナエレメント14、及び、インナーケース13を覆うアウターケース15を備える2重ケース構造のものである。
アウターケース15は、被取付面の一例となる車両ルーフ20から70[mm]以内の高さで上方に突出する立体形状のものである。例えば、上部前端が最も低く、また、上部後端が最も高く成形されたシャークフィン型の形状のものである。このアウターケース15は、電波透過性部材、例えば樹脂製のものであり、車体カラーに合わせて塗装される。
コイル支持部125もまた、円筒状に成形されている。前方支持部126及び後方支持部127には、それぞれ、コイルエレメント12をインナーケース13の内壁の所定部位に固定するための取付穴128が形成されている。
ジョイントプレート122は、例えば両端部を有する金属板を略Z字形状に折り曲げ、その一端部に貫通孔122aを設けたものである。貫通孔122aは、コイル支持部125の中空部の中心軸とほぼ一致する位置に配される。
U字片123は、上述したとおり、ターミナル111の二股部の中央部に差し込まれ、弾性的に挟持される。
同様に、内側端子162は、ヘリカルコイル121の取付機構を兼ねる。すなわち、コイルエレメント12のジョイントプレート122の貫通孔122aを通して、金属製の雄ネジを螺合することにより、ヘリカルコイル121と導通するジョイントプレート122が雄ネジの頭部と内側端子162とで挟持され、水密接続具16とヘリカルコイル121との電気的な接続が可能となる。
このアンテナ装置1は、まず、アウターケース15を除く部分から組み立てられる。
作業員は、まず、回路基板11にターミナル111を取り付け、その後、この回路基板11をベース10に取り付ける。また、インナーケース13の天頂部131にアンテナエレメント14を取り付ける。天頂部131へのアンテナエレメント14の取付は、アンテナエレメント14の5つの舌片142をインナーケース13の取付孔134に挿入した後、貫通孔141から雄ネジを水密接続具16の外側端子161に螺合させることで行う。このとき、天頂部131の凸部135がアンテナエレメント14の内表側面に弾接するため、車両の走行によって車体(車両ルーフ)及びアンテナ装置1が振動しても、アンテナエレメント14がインナーケース13から離れることがない。
なお、インナーケース13へのアンテナエレメント14の取り付けは、最後に行うようにしても良い。
図5に示された組立体は、ベース10とインナーケース13とが弾性パッド17を介して弾性接合して水密性が保持された状態で水密接続具16を通じてアンテナエレメント14とへリカルコイル121等と電気的に接続されている。そのため、アウターケース15と組立体との水密性が十分でなくとも、収容空間S内の電子回路に影響を与えないので、製造工程がきわめて簡略化される。
比較のため、同じ面積のアンテナエレメント14をインナーケース13の内側に形を変えながら組み込んだ実験用のアンテナ装置を構成し、このアンテナ装置と本実施形態のアンテナ装置1のようにインナーケース13の外側、すなわち天頂部131に配置した場合の感度を測定した。実験は、車両ルーフ20に代え、約1m四方の金属板に孔を設け、この金属板にアンテナ装置を取り付けて行った。実験用のアンテナ装置の場合、金属板からアンテナエレメントのうち最も高い部分までの高さは約64[mm]であった(本実施形態のアンテナ装置1の場合は65[mm])。周波数は、FM帯は、70[MHz]~90[MHz]と、AM帯では、594[kHz]を使用した。
いずれの場合も、本実施形態のように、アンテナエレメント14をインナーケース13の天頂部131に配置することにより、感度の向上がみられた。
また、アンテナエレメント14の形状や面積も、インナーケース13の外表面の形状に応じてフレキシブルに変えることができる
第1実施形態では、アンテナエレメント14が一つで、かつ、コイルエレメント12のヘリカルコイル121及びコイル部125が円筒状の場合の例を示したが、本発明の実施の形態は、このような例に限定されるものではない。
第2実施形態では、アンテナエレメントが2つであり、コイルが基板上に形成されることでモジュール化される場合の例を示す。基板上に形成された基板をコイル基板と称する。このコイル基板は、第1実施形態で説明した回路基板11上に立設される。
なお、アンテナエレメントを2つ設けるということは、異なる周波数帯の電磁波を受信可能ということである。
コイル基板223に設けられた第1接点223aは、図示しない第1コイルの一端と導通し、第3接点223cは、第1コイルの他端と導通する。コイル基板223に設けられた第2接点223bは、図示しない第2コイルの一端と導通し、第4接点223dは第2コイルの他端と導通する。
また、アンテナエレメント24a,24b及びコイル基板223をネジ止めするだけでインナーケース23に取り付けることができるので、製造工程も簡略化される。
Claims (7)
- 車体の所定部位に設置されるアンテナ装置であって、
その内部に電子部品を収容するための収容空間が形成された立体形状のインナーケースと、このインナーケースを覆うアウターケースとを有し、
前記インナーケースの外表面と前記アウターケースの内表面との間にアンテナエレメントが介在し、
このアンテナエレメントが、前記インナーケース内側の前記収容空間の水密性を維持しながら前記収容空間に収容される前記電子部品と電気的に接続されている、
アンテナ装置。 - 前記アンテナエレメントが存在するインナーケースの外表面の形状が前記アウターケースの内表面の形状と略相似形であり、該アンテナエレメントが、前記インナーケースの外表面又は前記アウターケースの内表面の形状に沿って略面状に形成されている、
請求項1記載のアンテナ装置。 - 前記インナーケースの外表面に露出する外側端子と、前記インナーケースの内表面に露出し、前記インナーケース内側の前記収容空間の水密性を維持しつつ前記外側端子と導通する内側端子とを有する水密接続具をさらに有し、この水密接続具が前記インナーケースのケース本体に埋設されている、
請求項1又は2記載のアンテナ装置。 - 前記水密接続具が、共通の底部と互いに逆方向に開口する一対の開口部とを有し、一方の前記開口部が前記外側端子、他方の前記開口部が前記内側端子となり、前記底部が前記収容空間と前記インナーケースの外表面周辺の空間とを遮断する有底筒状の導電部材を含んで構成される、
請求項3記載のアンテナ装置。 - 前記外側端子と前記内側端子の少なくとも一方が、ネジ又はピン部材を係合させる構造を有する、
請求項4記載のアンテナ装置。 - 前記外側端子が前記アンテナエレメントの取付機構を兼ねる、
請求項3、4又は5記載のアンテナ装置。 - 前記電子部品はモジュール化されたコイルを含み、前記内側端子が前記コイルの一端部の取付機構を兼ねる、
請求項3ないし6のいずれかの項記載のアンテナ装置。
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KR1020167025002A KR102263348B1 (ko) | 2014-02-10 | 2015-01-20 | 안테나 장치 |
AU2015214782A AU2015214782A1 (en) | 2014-02-10 | 2015-01-20 | Antenna device |
CA2939181A CA2939181C (en) | 2014-02-10 | 2015-01-20 | Antenna device |
EP15746706.9A EP3093920B1 (en) | 2014-02-10 | 2015-01-20 | Antenna device |
GB1613323.3A GB2537309A (en) | 2014-02-10 | 2015-01-20 | Antenna device |
MX2016010344A MX363860B (es) | 2014-02-10 | 2015-01-20 | Dispositivo de antena. |
CN201580007898.8A CN105981218B (zh) | 2014-02-10 | 2015-01-20 | 天线装置 |
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JP6970496B2 (ja) * | 2016-10-27 | 2021-11-24 | 株式会社ヨコオ | 車載後方撮影装置 |
CN113725606A (zh) * | 2016-12-06 | 2021-11-30 | 株式会社友华 | 天线装置 |
JP6992044B2 (ja) * | 2017-02-23 | 2022-01-13 | 株式会社ヨコオ | アンテナ装置 |
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JP6956650B2 (ja) * | 2018-02-19 | 2021-11-02 | 株式会社ヨコオ | 車載用アンテナ装置 |
JP6881349B2 (ja) | 2018-02-26 | 2021-06-02 | 株式会社デンソー | 車両用アンテナ装置 |
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CA2939181C (en) | 2022-11-01 |
CA2939181A1 (en) | 2015-08-13 |
EP3093920A4 (en) | 2017-09-13 |
CN110943277B (zh) | 2021-10-22 |
JP2015154104A (ja) | 2015-08-24 |
US10164327B2 (en) | 2018-12-25 |
EP3093920B1 (en) | 2023-12-06 |
CN105981218B (zh) | 2019-12-27 |
AU2015214782A1 (en) | 2016-08-18 |
CN105981218A (zh) | 2016-09-28 |
JP6320783B2 (ja) | 2018-05-09 |
GB2537309A (en) | 2016-10-12 |
MX363860B (es) | 2019-04-05 |
KR20160122779A (ko) | 2016-10-24 |
US20170179584A1 (en) | 2017-06-22 |
EP3093920A1 (en) | 2016-11-16 |
KR102263348B1 (ko) | 2021-06-10 |
GB201613323D0 (en) | 2016-09-14 |
CN110943277A (zh) | 2020-03-31 |
MX2016010344A (es) | 2017-01-16 |
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