EP3182508B1 - Antennenvorrichtung - Google Patents

Antennenvorrichtung Download PDF

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Publication number
EP3182508B1
EP3182508B1 EP16838078.0A EP16838078A EP3182508B1 EP 3182508 B1 EP3182508 B1 EP 3182508B1 EP 16838078 A EP16838078 A EP 16838078A EP 3182508 B1 EP3182508 B1 EP 3182508B1
Authority
EP
European Patent Office
Prior art keywords
supporting surface
antenna
antenna device
support
cable
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP16838078.0A
Other languages
English (en)
French (fr)
Other versions
EP3182508A4 (de
EP3182508A1 (de
Inventor
Yoshihiro NIIHARA
Yuichiro Yamaguchi
Hiroshi Chiba
Masaki Ueyama
Ning Guan
Hiroiku Tayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujikura Ltd
Original Assignee
Fujikura Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2016117497A external-priority patent/JP6595409B2/ja
Application filed by Fujikura Ltd filed Critical Fujikura Ltd
Priority claimed from PCT/JP2016/076871 external-priority patent/WO2017043663A1/ja
Publication of EP3182508A1 publication Critical patent/EP3182508A1/de
Publication of EP3182508A4 publication Critical patent/EP3182508A4/de
Application granted granted Critical
Publication of EP3182508B1 publication Critical patent/EP3182508B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • 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
    • H01Q1/3291—Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle mounted in or on other locations inside the vehicle or vehicle body
    • 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
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
    • H01Q9/28—Conical, cylindrical, cage, strip, gauze, or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines
    • H01Q9/285—Planar dipole
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/40—Element having extended radiating surface

Definitions

  • the present invention relates to an antenna device including a film antenna.
  • the present invention also relates to a method of manufacturing such an antenna device.
  • a flexible film antenna As an antenna that is easy to mount, a flexible film antenna is widely used.
  • a film antenna refers to an antenna including a flexible dielectric film and an antenna conductor provided on a surface of the dielectric film.
  • a film antenna that is used by being attached to a window of an automobile is widely known.
  • a high-frequency current is supplied to/from a film antenna via a cable (e.g. a coaxial cable) that is connected to a feed section including two connection points.
  • the film antenna and the cable are ordinarily connected by soldering a hot side/cold side conductor of the cable (an inner/outer conductor of the coaxial cable) to two connection points provided in an antenna conductor of the film antenna.
  • the cable which is pulled by a powerful force may come off of the feed section (two connection points) of the film antenna.
  • it is important for an antenna device including a film antenna and a cable to have greater durability (connection reliability) with respect to pulling of the cable.
  • Patent Literature 1 Examples of a literature disclosing a technique that may contribute to a solution to such a problem encompass Patent Literature 1.
  • Patent Literature 1 by fitting a cable into a groove provided in a holding member and causing the holding member to hold the cable, even in a case where one end of the cable is pulled, it is difficult for a force by which the one end of the cable is pulled to be transmitted to the other end of the cable.
  • the holding member by causing the holding member to hold the cable which is connected to a film antenna, it is possible to increase durability with respect to pulling of the cable.
  • Patent Literature 2 Further examples of background art can be found in Patent Literature 2 and Patent Literature 3.
  • the holding member disclosed in Patent Literature 1 has a function of increasing durability with respect to pulling of the cable but has no function of maintaining a three-dimensional structure of an antenna conductor.
  • use of (i) a support to/around which to attach/wind a film antenna and (ii) the holding member disclosed in Patent Literature 1 in combination to maintain a three-dimensional structure of an antenna conductor causes a problem of causing a structure to be complicated or larger.
  • the present invention has been made in view of the problems, and an object of the present invention is to (i) prevent an antenna device, which includes a film antenna and a cable connected to the film antenna, from causing a structure to be complicated or larger and (ii) allow the antenna device to have a more stable antenna characteristic and greater durability with respect to pulling of a cable.
  • an antenna device in accordance with an aspect of the present invention includes: a film antenna; a cable which is connected to a feed section of the film antenna; and a support, around which at least part of the film antenna is wound, the support including a holding section for holding the cable.
  • the present invention makes it possible to (i) prevent an antenna device, which includes a film antenna and a cable connected to the film antenna, from causing a structure to be complicated or larger and (ii) allow the antenna device to have a more stable antenna characteristic and greater durability with respect to pulling of a cable.
  • Fig. 1 is a perspective view illustrating the antenna device 1.
  • Fig. 2 is a top surface-side perspective view illustrating a support 30 included in the antenna device 1.
  • Fig. 2 is a bottom surface-side perspective view illustrating the support 30.
  • Fig. 3 is a plan view illustrating a film antenna 10 included in the antenna device 1.
  • the antenna device 1 includes the film antenna 10, a coaxial cable 20, and the support 30.
  • the film antenna 10 is wound around the support 30 so that the film antenna 10 forms a certain three-dimensional structure.
  • the coaxial cable 20 is connected to a feed section 14 which is made up of two connection points 14a and 14b of the film antenna 10.
  • the coaxial cable 20 is held by the support 30 so that the coaxial cable 20 passes through a certain wiring path.
  • the support 30 is a structure having (i) a first supporting surface 31, (ii) a second supporting surface 32 which intersects the first supporting surface 31 (the second supporting surface 32 is orthogonal to the first supporting surface 31 in Embodiment 1), and (iii) a third supporting surface 33 which faces the first supporting surface 31 and intersects the second supporting surface 32 (the third supporting surface 33 is orthogonal to the second supporting surface 32 in Embodiment 1).
  • the film antenna 10 is wound around the support 30 so that a front surface or a back surface of the film antenna 10 is in contact with the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33.
  • the support 30 is a box-shaped resin molded product as illustrated in Fig. 2 .
  • the first supporting surface 31 is a top surface of the support 30.
  • the second supporting surface 32 is a rear-end surface (surface on the x-axis positive side in the coordinate system illustrated) of the support 30.
  • the third supporting surface 33 is a bottom surface of the support 30.
  • the resin molded product has lightening holes in the top surface-side.
  • the first supporting surface 31 is constituted by top end surfaces (hatched with oblique lines in (a) of Fig. 2 ) of partition walls which are remaining portions other than the lightening holes.
  • the third supporting surface 33 protrudes frontwards (i.e.
  • the third supporting surface 33 is divided into two regions which are (i) a counter region 33a facing a region on which the first supporting surface 31 is formed and (ii) a non-counter region 33b not facing the region on which the first supporting surface 31 is formed.
  • the support 30 includes a first holding part 34, a second holding part 35, and a third holding part 36 as a holding section for increasing durability with respect to pulling of the coaxial cable 20 by holding the coaxial cable 20 so that the coaxial cable 20 passes through a certain wiring path.
  • a first recess 37 and a second recess 38 are provide.
  • the second recess 38 is provided so as to (i) be continuous with the first recess 37 and (ii) extend toward an end part of the third supporting surface 33.
  • the first and second recesses 37 and 38 correspond to a recessed containing part in accordance with an embodiment of the present invention.
  • a connection part via which an end part of the coaxial cable 20 and the feed section 14 are connected hereinafter referred to as "connection part of the end part of the coaxial cable 20 and the feed section 14" is contained.
  • the coaxial cable 20, which extends from the connection part penetrates through the first and second recesses 37 and 38.
  • the connection part of the end part of the coaxial cable 20 and the feed section 14 is covered with a resin mold part 21 described later (see Fig. 4 ).
  • the first recess 37 is a recess which (i) is provided at a part of the third supporting surface 33, which part is located in the vicinity of a boundary between the third supporting surface 33 and the second supporting surface 32, (ii) has a long shape extending along the boundary between the third supporting surface and the second supporting surface (i.e. extending along the y-axis in the coordinate system illustrated), and (iii) is recessed from the third supporting surface 33 toward first supporting surface 31 (i.e. toward the z-axis positive side in the coordinate system illustrated).
  • the first recess 37 has a size so as to contain the resin mold part 21 (which is resin molded product covering the connection part of the end part of the coaxial cable 20 and the feed section 14) described later.
  • the second recess 38 is a recess which (i) is narrower in width than the first recess 37, (ii) has one end part which is continuous with the first recess 37, and (iii) has the other end part which extends until the end part of the third supporting surface 33.
  • the second recess 38 is a recess which (i) extends along the boundary between the third supporting surface and the second supporting surface 32 (i.e. extending along the y-axis in the coordinate system illustrated) and (ii) is recessed from the third supporting surface 33 toward first supporting surface 31 (i.e. toward the z-axis positive side in the coordinate system illustrated).
  • the second recess 38 has a size so as to allow the coaxial cable 20, which extends from the resin mold part 21 contained in the first recess 37, to penetrate through the second recess 38.
  • the film antenna 10 is (i) attached to the support 30 so that the connection part of the end part of the coaxial cable 20 and the feed section 14 is contained in the first and second recesses 37 and 38 which are provided at a part of the third supporting surface 33 which part is located in the vicinity of a boundary between the third supporting surface 33 and the second supporting surface 32 and (ii) wound around the support 30 so that the film antenna 10 is in contact with the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33.
  • the film antenna 10 is wound around the support 30 so that (i) one end of the film antenna 10 is provided at an end part of the first supporting surface 31, which end part (edge on a first antenna conductor 12-side described later) is opposite an end part on a second supporting surface 32-side and (ii) the other end of the film antenna 10 extends out frontwards more than does an end part of the third supporting surface 33 opposite the end part of the third supporting surface 33 on the second supporting surface 32-side.
  • the first holding part 34 is provided in a region protruding frontwards more than does the end part of the first supporting surface 31, which end part is opposite the end part on the second supporting surface 32-side. Specifically, the first holding part 34 is provided on a top surface-side (toward the z-axis positive side in the coordinate system illustrated) of the non-counter region 33b of the third supporting surface 33.
  • the first holding part 34 holds part of the coaxial cable 20 so that the part extends in a direction along (parallel to, in Embodiment 1) both the first supporting surface 31 and the second supporting surface 32 (i.e. along the y-axis in the coordinate system illustrated).
  • the first holding part 34 provided outside of a spatial region which is sandwiched between (i) a region of the film antenna 10 which region is in contact with the first supporting surface 31 and (ii) a region of the film antenna 10 which region is in contact with the third supporting surface 33. This allows the coaxial cable 20 to be placed in the first holding part 34 even after the film antenna 10 is wound around the support 30.
  • the holding part 34 includes (i) a plurality of (4 in Embodiment 1) partition walls 34a which are provided so that respective wall surfaces of the partition walls 34a are perpendicular to both the third supporting surface 33 and the second supporting surface 32 and (ii) recesses 34b (slits) which are provided in the respective partition walls 34a and which have respective openings facing upwards.
  • partition walls 34a which are provided so that respective wall surfaces of the partition walls 34a are perpendicular to both the third supporting surface 33 and the second supporting surface 32 and (ii) recesses 34b (slits) which are provided in the respective partition walls 34a and which have respective openings facing upwards.
  • the partition wall 34c is provided so that a wall surface of the partition wall 34c extends parallel to the wall surfaces of the partition walls 34a.
  • a front end surface of the partition wall 34c is inclined so that a lower part of the front end surface further juts out frontwards than does an upper part of the front end surface. Therefore, in a case where the coaxial cable 20 is deeply fitted into the recesses 34b of the partition walls 34a, a center part of the coaxial cable 20 is pushed out frontwards by the partition wall 34c, so that the coaxial cable 20 meanders and is pressed against the partition walls 34a more firmly. This causes force of friction occurring between the coaxial cable 20 and the partition walls 34a to be greater, and therefore causes the coaxial cable 20 to be unlikely to come off.
  • the second holding part 35 is provided on a left-side surface (surface facing the y-axis negative direction in the coordinate system illustrated) of the support 30.
  • the second holding part 35 holds part of the coaxial cable 20 so that the part extends perpendicularly to the second supporting surface 32 (i.e. extends along the x-axis in the coordinate system illustrated).
  • the second holding part 35 serves to guide the coaxial cable 20 as follows:
  • the coaxial cable 20 extends from the resin mold part 21 contained in the recessed containing part (the first and second recesses 37 and 38) provided at a part of the third supporting surface 33 which part is located in the vicinity of a boundary between the third supporting surface 33 and the second supporting surface 32.
  • the coaxial cable 20 is then held by the second holding part 35 so that the coaxial cable 20 is (i) bent and guided frontwards (toward an end part opposite an end part on the second supporting surface 32-side) and (ii) guided to the first holding part 34.
  • the second holding part 35 is provided outside of the spatial region which is sandwiched between (i) the region of the film antenna 10 which region is in contact with the first supporting surface 31 and (ii) the region of the film antenna 10 which region is in contact with the third supporting surface 33. This allows the coaxial cable 20 to be placed in the second holding part 35 even after the film antenna 10 is wound around the support 30.
  • a protruding part 35a which serves as the second holding part 35, has a rectangular parallelepiped shape and protrudes leftwards from a lower end part of the left-side surface of the support 30.
  • the protruding part 35a has a recess 35b having an opening which faces downwards and which extend from an end surface on the second supporting surface 32-side to an opposite end surface.
  • the third holding part 36 is provided on a right-side surface (surface facing the y-axis positive direction in the coordinate system illustrated) of the support 30.
  • the third holding part 36 holds part of the coaxial cable 20 so that the part extends perpendicularly to the second supporting surface 32 (i.e. extends along the x-axis in the coordinate system illustrated). Then, the third holding part 36 bends the coaxial cable 20, which extends out from the first holding part 34, and guides the coaxial cable 20 frontwards.
  • the third holding part 36 is provided outside of the spatial region which is sandwiched between (i) the region of the film antenna 10 which region is in contact with the first supporting surface 31 and (ii) the region of the film antenna 10 which region is in contact with the third supporting surface 33. This allows the coaxial cable 20 to be placed in the third holding part 36 even after the film antenna 10 is wound around the support 30.
  • the third holding part 36 is a protruding part 36a having a rectangular parallelepiped shape and protruding rightwards from a lower end part of the right-side surface of the support 30.
  • the protruding part 36a has a recess 36b having an opening which faces downwards and which extend from an end surface on the second supporting surface 32-side to an opposite end surface.
  • the third supporting surface 33 of the support 30 thus has the first and second recesses 37 and 38 for containing the connection part of the end part of the coaxial cable 20 and the feed section 14 (part covered with the resin mold part 21) when the film antenna 10 is wound around the support 30.
  • the first holding part 34 for holding the coaxial cable 20 is provided on the surface (first supporting surface 31-side) opposite the third supporting surface 33.
  • the support 30 also includes two holding parts (the second and third holding parts 35 and 36).
  • the second and third holding parts 35 and 36 have the recess 35b and the recess 36b, respectively, each of which has an opening on the side opposite the surface on which the first holding part 34 is provided.
  • the second holding part 35 and the third holding part 36 are provided on the left-side surface and the right-side surface, respectively, of the support 30.
  • L-shaped protrusions 31a and I-shaped protrusions 31b are provided on the first supporting surface 31 (specifically the top end surface of the partition walls constituting the first supporting surface 31).
  • the L-shaped protrusions 31a are each made up of (i) a first columnar part extending upwards from the first supporting surface 31 and (ii) a second columnar part extending frontwards from an upper end part of the first columnar part. Rectangular openings 12c, which are made in the film antenna 10 (see Fig.
  • the I-shaped protrusions 31b are each a columnar part extending upwards from the first supporting surface 31.
  • the I-shaped protrusions 31b are to be engaged with circular openings 12d (see Fig. 3 ) made in the film antenna 10 so that the film antenna 10 is positioned relative to the support 30.
  • an L-shaped guide 32a is provided at a right end part of the second supporting surface 32.
  • the L-shaped guide 32a is made up of (i) a first plate-like part extending backwards from the second supporting surface 32 and (ii) a second plate-like part extending rightwards from a back end part of the first plate-like part.
  • an L-shaped guide 32b is provided at a left end part of the second supporting surface 32 (see (b) of Fig. 2 ).
  • the L-shaped guide 32b is made up of (i) a first plate-like part extending backwards from the second supporting surface 32 and (ii) a second plate-like part extending leftwards from a back end part of the first plate-like part.
  • the film antenna 10 can be made to come into close contact with the second supporting surface 31 by (i) sandwiching an right end part of the film antenna 10 between the second plate-like part of the L-shaped guide 32a and the second supporting surface 32 and (ii) sandwiching a left end part of the film antenna 10 between the second plate-like part of the L-shaped guide 32b and the second supporting surface 32.
  • the third supporting surface 33 has I-shaped protrusions 33d.
  • the I-shaped protrusions 33d are each a columnar part extending downwards from the third supporting surface 33.
  • the I-shaped protrusions 33d are to be engaged with circular openings 13a provided on the film antenna 10 (see Fig. 3 ) so that the film antenna 10 is positioned relative to the support 30.
  • a guide ring 33c is provided (see (a) of Fig. 2 ).
  • the film antenna 10 is to pass through the guide ring 33c, so that the film antenna 10 can be supported so as to be guided along the third supporting surface 33. In other words, the film antenna 10 passes through the guide ring 33c as well as is supported by the guide ring 33c.
  • examples of a material for the support 30 encompass a PC-ABS resin obtained by mixing a polycarbonate resin (PC resin) and an acrylonitrile-butadiene-styrene copolymerized synthetic resin (ABS resin).
  • PC resin polycarbonate resin
  • ABS resin acrylonitrile-butadiene-styrene copolymerized synthetic resin
  • the present invention is not limited to such a material.
  • the film antenna 10 includes (i) a dielectric film 11 and (ii) a pair of antenna conductors 12 and 13 provided as a pattern on a surface of the dielectric film 11.
  • the first antenna conductor 12 includes a first connection point 14a to which an inner conductor (hot side conductor) of the coaxial cable 20 is connected.
  • the second antenna conductor 13 includes a second connection point 14b to which an outer conductor (cold side conductor) of the coaxial cable 20 is connected.
  • the feed section 14 of the film antenna 10 is made up of the first connection point 14a and the second connection point 14b.
  • the end part of the coaxial cable 20 is connected to the feed section 14 (the first and second connection points 14a and 14b) of the film antenna 10.
  • the inner conductor of the coaxial cable 20 is connected to the first connection point 14a by soldering.
  • the outer conductor of the coaxial cable 20 is connected to the second connection point 14b by soldering.
  • the first antenna conductor 12 and the second antenna conductor 13 constitute (i) a dipole antenna in which the first antenna conductor 12 and the second antenna conductor 13 each serve as an antenna element or (ii) a monopole antenna in which the first antenna conductor 12 and the second antenna conductor 13 serve as an antenna element and a ground plane, respectively.
  • the first antenna conductor 12 is a conductive foil (e.g. copper foil) having a bell-like shape obtained by replacing, with quartered ellipses 12a and 12b, two corners that are adjacent via a shorter side of a rectangle.
  • a protrusion is provided at the side thus sandwiched between the quartered ellipses 12a and 12b of the first antenna conductor 12.
  • the first connection point 14a is provided on the protrusion.
  • the second antenna conductor 13 is a conductive foil (e.g. copper foil) having a rectangular shape. At a shorter side of the second antenna conductor 13, a recess is provided.
  • the second connection point 14b is provided in the vicinity of the recess.
  • the first antenna conductor 12 and the second antenna conductor 13 are combined so that (i) the protrusion is inserted into the recess and (ii) the first connection point 14a and the second connection point 14b face each other via a gap between the first antenna conductor 12 and the second antenna conductor 13.
  • an opening 13b is provided for increasing bonding strength with which the resin mold part 21 (described later) and the film antenna 10 are bonded.
  • the resin mold part 21 which covers the feed section 14 of the film antenna 10 and covers the end part of the coaxial cable connected to the feed section 14, is provided in a region including the opening 13b.
  • a resin material, by which the resin mold part 21 is formed spreads over the front surface and the back surface of the film antenna 10 via the opening 13. This allows bonding strength, with which the resin mold part 21 and the film antenna 10 are bonded, to be increased.
  • the film antenna 10 is wound around the support 30 by folding the film antenna 10 in a U shape whose ridgelines are (i) a line A-A' which extends across the first antenna conductor 12 and (ii) a line B-B' which extends between the first antenna conductor 12 and the second antenna conductor 13. That is, on the film antenna 10 wound around the support 30, the following bent parts are made: (i) a bent part which is bent at the line A-A' along a boundary between the first and second supporting surfaces 31 and 32 of the support 30 and (ii) a bent part which is bent at the line B-B' along a boundary between the second and third supporting surfaces 32 and 33.
  • a region 10a (first region: main part of the first antenna conductor 12), which expands between the edge on the first antenna conductor 12-side and the line A-A', comes into contact with the first supporting surface 31 of the support 30, (ii) a region 10b (second region), which expands between the line A-A' and the line B-B', comes into contact with the second supporting surface 32 of the support 30, and (iii) a region 10c (third region: main part of the second antenna conductor 13), which expands between the line B-B' and a line C-C' that extends across the second antenna conductor 13), comes into contact with the third supporting surface 33 of the support 30.
  • a region 10d which expands between the line C-C' and an edge on a second antenna conductor 13-side, does not come into contact with any surface of the support 30.
  • examples of a material for the dielectric film 11 encompass polyimide.
  • examples of a material for each of the pair of antenna conductors 12 and 13 encompass copper.
  • the film antenna 10 is preferably highly flexible so as to (i) fit the film antenna 10, which is folded, to each of the first through third supporting surfaces 31 through 33 of the support 30 and (ii) prevent a gap between the film antenna 10 and the support 30 from occurring. Therefore, the dielectric film 11, the first antenna conductor 12, and the second antenna conductor 13 are each preferably thin in thickness.
  • the antenna conductors 12 and 13 are each a copper foil having a thickness of 20 ⁇ m and (2) the dielectric film 11 is a polyimide film which has one surface coated with an adhesive and which has a total thickness of 35 ⁇ m including the thickness of the adhesive.
  • the film antenna 10 can further include a dielectric film which covers the front surfaces of the antenna conductors 12 and 13. That is, the film antenna 10 can be configured so that the antenna conductors 12 and 13 are sandwiched between two dielectric films. In a case where both surfaces of each of the antenna conductors 12 and 13 are covered with the dielectric films, it is possible to prevent the occurrence of damage to and deterioration of the antenna conductors 12 and 13.
  • FIG. 4 is a perspective view illustrating the antenna device 1.
  • the support 30 is omitted from (a) of Fig. 4 .
  • (b) of Fig. 4 is a perspective view illustrating the film antenna 10 included in the antenna device 1 illustrated in (a) of Fig. 4 .
  • the inner conductor and the outer conductor of the coaxial cable 20 and the resin mold part 21 (which covers the feed section 14 without a gap) are provided (i) at the connection part of the end part of the coaxial cable 20 and the feed section 14 and (ii) in the vicinity of the connection part.
  • the resin mold part 21 is formed by a resin molded product. This prevents the inner conductor and the outer conductor of the coaxial cable 20 and the feed section 14 from being exposed. Therefore, the resin mold part 21 allows the connection part of the coaxial cable 20 and the feed section 14 to be waterproof. This prevents soldering of the feed section 14 from deteriorating due to moisture in an atmosphere or the like, and consequently increases a water-resistant property of the film antenna 10.
  • the second antenna conductor 13 has the opening 13b.
  • FIG. 5 A resin mold part 21 ⁇ , which is a variation of the resin mold part 21, will be described below with reference to Fig. 5 .
  • (a) of Fig. 5 is a perspective view illustrating an antenna device 1 including the resin mold part 21 ⁇ .
  • (b) of Fig. 5 is a right side view illustrating the resin mold part 21 ⁇ (side view obtained when resin mold part 21 ⁇ is viewed from y-axis negative side in the coordinate system illustrated). Note that a support 30 and part (cable part) of a coaxial cable 20 other than the resin mold part 21 ⁇ are omitted from (b) of Fig. 5 .
  • the resin mold part 21 ⁇ includes a first covering part 22 ⁇ , a second covering part 23 ⁇ , and a third covering part 24.
  • the first covering part 22 ⁇ is provided on a front surface (surface facing the z-axis positive side in the coordinate system illustrated) of the film antenna 10.
  • the second covering part 23 ⁇ is provided on a back surface (surface facing the z-axis negative side in the coordinate system illustrated) of the film antenna 10.
  • the third covering part 24 is provided at an end part toward which the cable part of the coaxial cable 20 is drawn.
  • a region in which the first covering part 22 ⁇ is in contact with the front surface of the film antenna 10 is identical to a region in which the second covering part 23 ⁇ is in contact with the back surface of the film antenna 10.
  • the first covering part 22 ⁇ is configured so as to gradually become thinner in thickness (height as measured from the front surface of the film antenna 10) from a part corresponding to a center part of the coaxial cable 20 to a part corresponding a line B-B'.
  • the first covering part 22 ⁇ gradually becomes thinner toward a bent part at which the film antenna 10 is bent between the third region 10c and a second region 10b.
  • This part of the first covering part 22 ⁇ , which part gradually becomes thinner in thickness will be referred to as "skirt part 22 ⁇ 1" of the first covering part 22 ⁇ .
  • the skirt part 22 ⁇ 1 includes, of edges of the first covering part 22 ⁇ , an edge extending along the line B-B' (i.e. the edge that is closer to the line B-B').
  • the second covering part 23 ⁇ is configured so as to gradually become thinner in thickness (height as measured from the front surface of the film antenna 10) from a part corresponding to the center part of the coaxial cable 20 to a part corresponding to the line B-B'.
  • the second covering part 23 ⁇ gradually becomes thinner toward the bent part at which the film antenna 10 is bent between the third region 10c and the second region 10b.
  • This part of the second covering part 23 ⁇ , which part gradually becomes thinner in thickness will be referred to as "skirt part 23 ⁇ 1" of the second covering part 23 ⁇ .
  • the skirt part 23 ⁇ 1 includes, of edges of the second covering part 23 ⁇ , an edge extending along the line B-B' (i.e. the edge that is close to the line B-B').
  • the resin mold part 21 ⁇ is configured so that the skirt part 22 ⁇ 1 of the first covering part 22 ⁇ and the skirt part 23 ⁇ 1 of the second covering part 23 ⁇ are located on a front side and a back side, respectively, of a shared region so as to face each other. Therefore, in a case where the film antenna 10 is folded at the line B-B' as a ridgeline, stress derived from the folding can be distributed to the skirt part 22 ⁇ 1 of the first covering part 22 ⁇ and to the skirt part 23 ⁇ 1 of the second covering part 23a.
  • each of the skirt parts 22 ⁇ 1 and 23 ⁇ 1 thus gradually becomes thinner in thickness toward the line B-B'. Therefore, in a case where the film antenna 10 is folded, the first covering part 22 ⁇ and the second covering part 23 ⁇ are each more bendable toward the line B-B' in response to force applied along the z-axis. Therefore, stress derived from folding of the film antenna 10 does not become concentrated on the edges of the first covering part 22 ⁇ and the second covering part 23 ⁇ along the line B-B', but is gradually reduced on the skirt parts 22 ⁇ 1 and 23 ⁇ 1 as distancing from the line B-B'.
  • a resin mold part forming step is carried out in which the resin mold part 21 ⁇ is subjected to injection molding while the film antenna 10 is spread out flat and then (ii) a winding step is carried out in which the film antenna 10 is wound around the support 30.
  • the resin mold part 21 ⁇ is provided along the shape of the film antenna 10 that is spread out. Therefore, in the winding step, a large level of stress is applied to, of all the edges of the first covering part 22 ⁇ and second covering part 23 ⁇ , the edges extending along the line B-B'.
  • the resin mold part 22 ⁇ including the skirt parts 22 ⁇ 1 and 23 ⁇ 1 is suitable as a resin mold part to be formed by injection molding with the use of such a die.
  • the resin mold part 21 ⁇ is also suitable in a case where the resin mold part 21 ⁇ is made of a resin material having a high degree of hardness.
  • first covering part 22 ⁇ and second covering part 23 ⁇ are configured so as to gradually become thinner in thickness from the parts corresponding to the center part of the coaxial cable 20 to parts corresponding to a line C-C'. These parts, which gradually become thinner in thickness, will be referred to as "skirt parts 22 ⁇ 2 and 23 ⁇ 2" of the first covering part 22 ⁇ and second covering part 23 ⁇ , respectively.
  • the second antenna conductor 13 is configured not to be folded. Therefore, although the skirt parts 22 ⁇ 2 and 23 ⁇ 2 do not serve an active role in increasing the water-resistant property of the antenna device 10, the skirt parts 22 ⁇ 2 and 23 ⁇ 2 bring about the effect of improving an appearance of the resin mold part 21 ⁇ .
  • the first covering part 22 ⁇ and second covering part 23 ⁇ can thus include the skirt parts 22 ⁇ 2 and 23 ⁇ 2, respectively.
  • FIG. 6 The wiring path of the coaxial cable 20 included in the antenna device 1 will be described below with reference to Fig. 6 .
  • (a), (b), and (d) of Fig. 6 are a plan view, a front view, and a bottom view, respectively, which illustrate the antenna device 1.
  • (c) of Fig. 6 is a side view illustrating the left-side surface of the antenna device 1.
  • the film antenna 10 is omitted so that the wiring path of the coaxial cable 20 can be easily recognized.
  • the film antenna 10 connected to the coaxial cable 20 is wound around the support 30.
  • the connection part of the end part of the coaxial cable 20 and the feed section 14 is contained in the first and second recesses 37 and 38 provided on the third supporting surface 33 of the support 30.
  • the coaxial cable 20, which is drawn from the feed section 14 toward the left-side surface of the support 30 (toward the y-axis negative side of the coordinate system illustrated) is (i) bent frontwards with respect to the support 30 (toward the x-axis negative side in the coordinate system illustrated) and then (ii) fitted into the second holding part 35.
  • the left-side surface of the support 30 intersects the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33.
  • the second holding part 35 holds the coaxial cable 20 so that part of the coaxial cable 20 extends (i) in a direction along the first supporting surface 31 and the third supporting surface 33 and (ii) in a direction that intersects the second supporting surface 32.
  • the coaxial cable 20 after being fitted into the second holding part 35 is (i) bent upwards with respect to the support 30 (toward the z-axis positive side in the coordinate system illustrated) and (ii) bent rightwards (toward the y-axis positive side in the coordinate system illustrated). Then, the coaxial cable 20 is fitted into the first holding part 34.
  • the first holding part 34 holds the coaxial cable 20 so that part of the coaxial cable 20 extends in a direction along the first supporting surface 31 and the second supporting surface 32.
  • the coaxial cable 20 after being fitted into the first holding part 34 is bent frontwards with respect to the support 30 (toward the x-axis negative side in the coordinate system illustrated).
  • the first holding part 34 is preferably provided outside of a spatial region sandwiched between the region 10a of the film antenna 10 and the region 10c of the film antenna 10. That is, in a plan view of the support 30, the first holding part 34 is preferably provided outside of the first supporting surface 31 (see (a) of Fig. 6 ).
  • the second holding part 35 is also preferably provided outside of the first supporting surface 31.
  • one of the characteristics of the wiring path of the coaxial cable 20 is that part of the coaxial cable 20, which part extends in the direction along the first supporting surface 31 and the second supporting surface 32, is held by the first holding part 34 so that a distance D1 between the part and the first supporting surface 31 is equal to a distance D2 between the part and the third supporting surface 33.
  • This configuration allows an excellent radiation characteristic to be obtained even in a case where the wiring path is configured so that part of the coaxial cable 20 extends across the third supporting surface 33. The radiation characteristic in such a case will be described later in Example 1.
  • This configuration also restricts deterioration of a radiation characteristic even in a case where the wiring path is configured so that part of the coaxial cable 20 extends across the third supporting surface 33. The radiation characteristic in such a case will be described later in Example 2.
  • the recesses 34b of the first holding part 34 are preferably opened upwards with respect to the support 30 (toward the z-axis positive side in the coordinate system illustrated) and (ii) the recess 35b of the second holding part 35 is opened downwards with respect to the support 30 (toward the z-axis negative side in the coordinate system illustrated).
  • the recess 36b of the third holding part 36 is preferably opened downwards with respect to the support 30 (toward the z-axis negative side in the coordinate system illustrated).
  • the recess 35b and the recess 36b are made in the second and third holding parts 35 and 36, respectively, so as to be opened in a first direction in which the first and second recesses 37 and 38 made in the third supporting surface 33 are opened and (ii) the recesses 34b is made in the first holding part 34 so as to be opened in a second direction opposite the first direction.
  • This configuration allows the support 30, which includes the first through third holding parts 34, 35, and 36, to be easily formed with the use of a pair of upper and lower dies, and therefore allows for a reduction in costs for producing the antenna device 1.
  • the holding parts for holding the coaxial cable 20 are provided in an upper side and a lower side of the support 30, it is possible to increase durability with respect to pulling of the coaxial cable 20 (durability of the connection part via which the coaxial cable 20 and the feed section 14 are connected).
  • the second holding part 35 is provided further downwards with respect to the support 30 (toward the z-axis negative side in the coordinate system illustrated) than the first holding part 34 and (ii) part of the coaxial cable 20 held by the first holding part 34 and the second holding part 35 extends in a direction (along the z-axis) that intersects the first and third supporting surfaces 31 and 33 between the first holding part 34 and the second holding part 35. It is also preferable that as illustrated in (b) of Fig.
  • the third holding part 36 is provided further downwards with respect to the support 30 (toward the z-axis negative side in the coordinate system illustrated) than the first holding part 34 and (ii) part of the coaxial cable 20 held by the first holding part 34 and the third holding part 36 extends, between the first holding part 34 and the third holding part 36, in a direction (along the z-axis) that intersects the first and third supporting surfaces 31 and 33.
  • part of the coaxial cable 20, which part extends toward the y-axis negative side from the resin mold part 21 contained in the first and second recesses 37 and 38, is bent and then held by the second holding part 35 so as to extend toward the x-axis negative side (see (d) of Fig. 6 ).
  • part of the coaxial cable 20, which part is held by the second holding part 35 is (i) bent toward the z-axis positive side so as to extend toward the first holding part 34 and then (ii) bent and held by the first holding part 34 so as to extend toward the y-axis positive side (see (a) through (c) of Fig. 6 ).
  • part of the coaxial cable 20, which part is held by the first holding part 34 is (i) bent toward the z-axis negative side so as to extend toward the third holding part 36 and then (ii) bent and held by the third holding part 36 so as to extend toward the x-axis negative side (see (b) and (d) of Fig. 6 ).
  • bent parts of the coaxial cable 20 are subjected to force to straighten the bent parts.
  • This (1) causes part of the coaxial cable 20, which part is held (sandwiched) by the first holding part 34, to be more firmly pressed against the recesses 34b of the first holding part 34 and (2) causes part of the coaxial cable 20, which part is held by the second holding part 35, to be more firmly pressed against the recess 35b of the second holding part 35. Therefore, even in a case where force to pull the coaxial cable 20 from the antenna device 1 is applied, it is still possible to prevent the coaxial cable 20 from being detached from the first holding part 34 and the second holding part 35.
  • connection part of the feed section 14 and the coaxial cable 20 is prevented from being subjected to pulling force even in a case where the pulling force to pull the coaxial cable 20 from the antenna device 1 is applied.
  • a surface of the second holding part 35, which surface is in contact with a bent part of the coaxial cable 20, is preferably a smooth curved surface.
  • the surface of the second holding part 35 in contact with the bent part of the coaxial cable 20 is configured to be a curved surface by chamfering an end part of the second holding section 35, which end part faces frontwards with respect to the support 30 (i.e. toward the x-axis negative side in the coordinate system illustrated).
  • a first production method of producing the antenna device 1 in accordance with Embodiment 1 includes: (i) a step of connecting the coaxial cable 20 to the feed section 14 of the film antenna 10 and (ii) a resin mold part forming step of forming the resin mold part 21 which covers the feed section 14 and covers the end part of the coaxial cable 20, which end part is connected to the feed section 14.
  • the first production method can further include the step of preparing the support 30 which (i) has: the first supporting surface 31; the second supporting surface 32 intersecting the first supporting surface 31; and the third supporting surface 33 facing the first supporting surface 31 and intersecting the second supporting surface 32, (ii) includes the first and the second holding parts 34 and 35 (holding section) for holding the coaxial cable 20, and (iii) is configured so that the first and second recesses 37 and 38 (recessed containing part) for containing the resin mold part 21 are provided in the third supporting surface 33.
  • the first production method can further include (i) a winding step of: attaching the film antenna 10 to the support 30 so that the resin mold part 21 is contained in the first and second recesses 37 and 38; and winding the film antenna 10 around the support 30 so that the film antenna 10 comes into contact with the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33 and (ii) a wiring step of wiring the coaxial cable 20 so that: the coaxial cable 20 is held by the first and the second holding parts 34 and 35; and part of the coaxial cable 20 extends in a direction along the first supporting surface 31 and the second supporting surface 32.
  • the resin mold part 21 is formed by injection molding in which a resin molding die is used.
  • the film antenna 10 in which the end part of the coaxial cable 20 is connected to the feed section 14, is set in a die and then (ii) a region, which includes the feed section 14 and which is located in the vicinity of the feed section, is contained in a cavity of the die. Then, the cavity is filled with a high-temperature molten resin material, and then the molten resin material is hardened by being cooled in the cavity. Then, by taking the film antenna 10 out of the die, it is possible to obtain the film antenna 10 in which the resin mold part 21 covers the feed section 14 and covers the end part of the coaxial cable 20 which end part is connected to the feed section 14.
  • Examples of a resin material of which the resin mold part 21 is made encompass, but are not limited to, (i) moisture curing urethane-based hot melt (such as "TECHNOMELT PUR 9515" manufactured by Henkel AG & Co. KGaA), (ii) a thermosetting resin, and (iii) an ultraviolet-curing resin.
  • Embodiment 1 discussed producing of the antenna device 1 by (i) covering, with the resin mold part 21, the connection part of the feed section 14 of the film antenna 10 and the coaxial cable 20 and then (ii) winding the film antenna 10 around the support 30.
  • the present invention is not limited to this production method. A second production method will be described in detail below.
  • the second production method of producing the antenna device 1 in accordance with Embodiment 1 includes (i) a connecting step of connecting the coaxial cable 20 to the feed section 14 of the film antenna 10 and (ii) the step of preparing the support 30 which (a) has: the first supporting surface 31; the second supporting surface 32 intersecting the first supporting surface 31; and the third supporting surface 33 facing the first supporting surface 31 and intersecting the second supporting surface 32, (b) includes the first and the second holding parts 34 and 35 (holding section) for holding the coaxial cable 20, and (c) is configured so that the first and second recesses 37 and 38 (recessed containing part) for containing the feed section 14 are provided in the third supporting surface 33.
  • the second production method can further include (i) a winding step of: attaching the film antenna 10 to the support 30 so that the connection part of the feed section 14 and the coaxial cable 20 is contained in the first and second recesses 37 and 38 (recessed containing part); and winding the film antenna 10 around the support 30 so that the film antenna 10 comes into contact with the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33 and (ii) a wiring step of wiring the coaxial cable 20 so that: the coaxial cable 20 is held by the first and the second holding parts 34 and 35 (holding section); and part of the coaxial cable 20 extends in a direction along the first supporting surface 31 and the second supporting surface 32.
  • the second production method can further include a resin mold part forming step of, after the above steps are carried out, (i) filling, with a liquid resin material, the first and second recesses 37 and 38 (recessed containing part) in which the connection part of the feed section 14 and the coaxial cable 20 is contained and (ii) hardening the liquid resin material so as to form the resin mold part 21 that covers the feed section 14 and covers the end part of the coaxial cable 20 which end part is connected to the feed section 14.
  • the antenna device 1 can be provided various structures. Examples of the structures encompass a vehicle body of an automobile. An example in which the antenna device 1 is provided in a vehicle body will be described below with reference to Fig. 7 .
  • (a) of Fig. 7 is a perspective view illustrating a vehicle body 50 on which a spoiler 52 including an antenna device 1 is provided.
  • (b) of Fig. 7 is a perspective view illustrating the spoiler 52.
  • the spoiler 52 is provided at a back end part of a roof 51 of the vehicle body 50.
  • the spoiler 52 is an integrally-formed resin member.
  • the spoiler 52 has a (i) structure (not shown) for setting the spoiler 52 to a certain position relative to the back end part of the roof 51 and (ii) a structure (not shown) for fixing the spoiler 52 to a certain position of the roof 51.
  • the spoiler 52 is fixed to the certain position of the roof 51 by these structures.
  • the spoiler 52 has functions such as restricting irregular airflows (rectifying the airflow) at a back part of the vehicle body 50 and improving an appearance of the vehicle body 50.
  • the spoiler 52 is configured to gradually decrease in vertical size toward the back end part.
  • a void is made in the back part of the spoiler 52 (i.e. the back part has a hollow structure) (see (b) of Fig. 7 ).
  • the antenna device 1 including the spoiler 52 is achieved by providing the antenna device 1 in the void.
  • the antenna device 1 is provided in the spoiler 52 in such a manner as to be upside down in comparison with the orientation of the antenna device 1 illustrated in Fig. 1 , so that the third supporting surface 33 of the support 30 faces toward a top surface of the spoiler 52 of the vehicle body 50.
  • the antenna device 1 in accordance with Embodiment 1 can be provided on, for example, a vehicle body of an automobile. Note, however, that depending on how the antenna device 1 is provided on a vehicle body, there is a possibility that the end part of the film antenna 10 is blown by wind, so that the film antenna 10 vibrates and consequently makes a noise such as a whizzing sound. There is also a possibility that in a case where the end part of the film antenna 10 continues to be blown by wind, the end part becomes deformed.
  • the antenna device 1 ⁇ in accordance with Embodiment 2 is an antenna device which is further intended to prevent the occurrences of such noises and deformations.
  • Fig. 8 is a perspective view illustrating the antenna device 1 ⁇ .
  • (b) of Fig. 8 is an exploded perspective view illustrating the antenna device 1 ⁇ . Note that a part (cable part) of a coaxial cable 20 other than the resin mold part 21 ⁇ is omitted from each of (a) and (b) of Fig. 8 .
  • Fig. 9 is a plan view illustrating a film antenna 10 ⁇ included in the antenna device 1 ⁇ .
  • (a) of Fig. 10 is an enlarged plan view illustrating a support 30 ⁇ included in the antenna device 1 ⁇ .
  • (b) of Fig. 10 is an enlarged perspective view illustrating the support 30 ⁇ .
  • the antenna device 1 ⁇ includes the film antenna 10 ⁇ , the coaxial cable 20, and the support 30 ⁇ .
  • the film antenna 10 ⁇ corresponds to the film antenna 10 included in the antenna device 1 in accordance with Embodiment 1.
  • the support 30 ⁇ corresponds to the support 30 included in the antenna device 1 in accordance with Embodiment 1.
  • the resin mold part 21 ⁇ corresponds to the resin mold part 21 included in the antenna device 1 in accordance with Embodiment 1.
  • the support 30 ⁇ differs from the support 30 of the antenna device 1 in accordance with Embodiment 1 in that the support 30 ⁇ has a slot 31c.
  • the slot 31c is a hole made in a direction from the a first supporting surface 31 of the support 30 ⁇ toward a third supporting surface 33 (not shown in Fig. 8 ) (toward the z-axis negative side in the coordinate system illustrated).
  • a shape of an opening 31ap of the slot 31c made in the first supporting surface 31 is a rectangle whose (i) longer sides extend along the y-axis in the coordinate system illustrated and (ii) shorter sides extend along the x-axis in the coordinate system illustrated.
  • the slot 31c whose shape is obtained by advancing the rectangular opening 31ap toward the z-axis negative side, has an inner space which is a rectangular parallelepiped that consists of four side walls, specifically a pair of side walls including the longer sides of the opening 31ap (pair of side walls facing each other) and a pair of side walls including the shorter sides of the opening 31ap (pair of side walls facing each other).
  • the film antenna 10 ⁇ is obtained by replacing, with a dielectric film 11 ⁇ , the dielectric film 11 included in the film antenna 10 of the antenna device 1 in accordance with Embodiment 1.
  • the dielectric film 11 ⁇ is obtained by extending the dielectric film 11 in Embodiment 1 away from the feed section 14. That is, the film antenna 10 ⁇ , which includes the dielectric film 11 ⁇ , further includes, in addition to regions 10a through 10d, a region 10e (fourth region: end part on a first antenna conductor 12-side) which expands from an edge on the first antenna conductor 12-side to a line D-D'.
  • the region 10e has rectangular openings 11a.
  • the film antenna 10 ⁇ is wound around the support 30 ⁇ by folding the film antenna 10 ⁇ in a U shape whose ridgelines are a line A-A' and a line B-B'.
  • the film antenna 10 ⁇ is made possible to insert the region 10e into the slot 31c of the support 30 ⁇ .
  • a total of two fixing parts for preventing the region 10e from being detached from the slot 31c are provided such that one of the two fixing parts and the other one of the two fixing parts are provided toward the y-axis positive side and the y-axis negative side, respectively, in the coordinate system illustrated.
  • Fig. 10 is an enlarged view illustrating the one of the two fixing parts which is provided toward the y-axis negative side.
  • the one of the two fixing parts which is provided toward the y-axis negative side is made up of (i) a rib 31d and a rib 31e which are a pair of ribs and (ii) a wedge-shaped protrusion 13f.
  • the other fixing part provided toward the y-axis positive side is configured as is the fixing part provided toward the y-axis negative side.
  • the rib 31d and the rib 31e are each a protrusion protruding from one side wall (side wall on the x-axis positive side in the coordinate system illustrated) to the other side wall (side wall on the x-axis negative side in the coordinate system illustrated) of the pair of side walls including the longer sides of the opening 31ap.
  • the rib 31d and the rib 31e each extend linearly in a direction from the first supporting surface 31 toward the third supporting surface 33 (toward the z-axis negative side in the coordinate system illustrated). That is, the rib 31d and the rib 31e extend parallel to each other.
  • an amount by which each of the rib 31d and the rib 31e protrudes is 1/2 of a length of the shorter side of the opening 31ap.
  • the wedge-shaped protrusion 13f is a protrusion protruding from one side wall (on the x-axis negative side) toward the other side wall (on the x-axis positive side) of the pair of side walls including the longer sides of the opening 31ap.
  • the wedge-shaped protrusion 13f is located in the middle between the rib 31d and the rib 31e along the y-axis in the coordinate system illustrated.
  • the wedge-shaped protrusion 13f is also located in the middle between the first supporting surface 31 and the third supporting surface 33 in regard to a depth of the slot 31c (along the z-axis in the coordinate system illustrated).
  • the wedge-shaped protrusion 13f When the wedge-shaped protrusion 13f is viewed from the y-axis negative side in the coordinate system illustrated, the wedge-shaped protrusion 13f has a shape of a trapezoid (see (b) of Fig. 10 ).
  • a slope 31f1 which corresponds to one of the two legs of the trapezoid, intersects, at an acute angle, the side wall on the x-axis negative side.
  • a stopper 31f2 which corresponds to the other one of the two legs of the trapezoid, intersects, at a right angle, the side wall on the x-axis negative side.
  • a maximum value of the amount by which the wedge-shaped protrusion 13f protrudes is preferably 1/2 of the length of the shorter sides of the opening 31ap or slightly greater than 1/2 of the length of the shorter sides of the opening 31ap.
  • the region 10e can be smoothly inserted into the slot 31c.
  • the region 10e is inserted into the slot 31c and then the openings 11a (see Fig. 9 ) reach a position corresponding to the wedge-shaped protrusion 13f, the region 10e is pushed by the rib 31d and the rib 31e from the side wall on the x-axis positive side toward the side wall on the x-axis negative side of the slot 31c. This causes the openings 11a to be caught by the wedge-shaped protrusion 13f.
  • the stopper 31f2 which is steep, is provided on the third supporting surface 33-side of the wedge-shaped protrusion 13f, the openings 11a are prevented from being unintentionally detached from the wedge-shaped protrusion 13f even in a case where force to pull the region 10e from the slot 31c is applied. That is, the region 10e does not unintentionally come off from the slot 31c.
  • the region 10e which is the end part of the film antenna 10 ⁇ , is contained in the slot 31c and is prevented from coming off.
  • This allows the film antenna 10 ⁇ to be in close contact with the support 30 ⁇ even in a case where the antenna device 1 ⁇ is provided so as to be blown by wind.
  • the film antenna 10 ⁇ does not vibrate. It is therefore possible to prevent the occurrence of a noise such as a whizzing sound. It is also possible to prevent the end part of the film antenna 10 ⁇ from being deformed.
  • a production method of producing the antenna device 1 ⁇ is similar to the production method of producing the antenna device 1, except that the step of inserting the region 10e into the slot 31c is further included in the winding step.
  • a radiation characteristic of the antenna device 1 changes, depending on the wiring path of the coaxial cable 20 extending from the feed section 14. Specifically, the radiation characteristic of the antenna device 1 changes, depending on a relationship in length between distances from a part of the coaxial cable 20, which part is held by the first holding part 34, to the first and the second antenna conductors 12 and 13 (between the distance D1 and the distance D2).
  • an antenna device in which a coaxial cable drawn from a feed section does not extend across a film antenna, is used.
  • the coaxial cable drawn from the feed section is then provided away from the antenna device without being fitted into a second holding part 35 or a first holding part 34. That is, the antenna device in accordance with Reference Example is configured so that there is no strength with respect to pulling of the coaxial cable.
  • the film antenna included in the antenna device in accordance with Reference Example is identical to the film antenna 10 included in the antenna device 1 in accordance with Embodiment 1, and is wound around a support 30 in a manner identical to that in which the film antenna 10 is wound around the support 30. That is, the antenna device in accordance with Reference Example differs from the antenna device 1 only in that the coaxial cable 20 is not held by the first holding part 24 of the support 30.
  • Fig. 11 is a graph showing (i) VSWR (Voltage Standing Wave Ratio) of the antenna device in accordance with Reference Example and (ii) a frequency dependency of an average gain of the antenna device in accordance with Reference Example.
  • the average gain is calculated by averaging, over entire 360°, radiant gains obtained by the antenna device on an x-y plane.
  • Plotting of the VSWR shown in Fig. 11 indicates that the VSWR of the antenna device in accordance with Reference Example is (i) below 2 in an 800 MHz band and (ii) drastically increased in a frequency band of 700 MHz or less.
  • Plotting of the average gain of entire polarized waves in the horizontal plane shown in Fig. 11 indicates that the antenna device in accordance with Reference Example exhibits an excellent average gain greater than -1dBi in the 800 MHz band.
  • Fig. 12 is a graph showing (i) VSWR of the antenna device 1 in accordance with Example 1 and (ii) a frequency dependency of an average gain of the antenna device 1 in accordance with Example 1.
  • Plotting of the VSWR shown in Fig. 12 indicates that the VSWR of the antenna device 1 in accordance with Example 1 is (i) below 2 in an 800 MHz band and (ii) drastically increased in a frequency band of 700 MHz or less.
  • Plotting of the average gain of entire polarized waves in the horizontal plane shown in Fig. 11 indicates that the antenna device 1 in accordance with Example 1 exhibits an excellent average gain greater than -1dBi in the 800 MHz band.
  • the antenna device 1 in accordance with Example 1 is configured so that the coaxial cable 20 extends across the film antenna 10
  • the antenna device 1 in accordance with Example 1 still exhibits a radiation characteristic comparable to that of the antenna device in accordance with Reference Example which is configured so that the coaxial cable is provided away from the antenna device while the coaxial cable does not extend across the film antenna.
  • Fig. 13 is a graph showing (i) VSWR of the antenna device 1 in accordance with Example 2 and (ii) a frequency dependency of an average gain of the antenna device 1 in accordance with Example 2.
  • the antenna device 1 in accordance with Example 2 is obtained by configuring the antenna device 1 so that a distance D1 and a distance D2 are 15.6 mm and 1.4 mm, respectively. That is, the antenna device 1 in accordance with Example 2 is configured so that the distance D1 is equal to or greater than the distance D2.
  • the antenna device 1 in accordance with Example 2 and the antenna device 1 in accordance with Example 1 are identical except for the numerical values of the distance D1 and the distance D2.
  • Plotting of the VSWR shown in Fig. 13 indicates that the VSWR of the antenna device 1 in accordance with Example 2 is (i) approximately 2 in an 800 MHz band and (ii) drastically increased in a frequency band of 700 MHz or less.
  • Plotting of the average gain of entire polarized waves in the horizontal plane shown in Fig. 13 indicates that the antenna device 1 in accordance with Example 2 exhibits an excellent average gain greater than -1dBi in the 800 MHz band.
  • the antenna device 1 in accordance with Example 2 is configured so that the coaxial cable 20 extends across the film antenna 10
  • the antenna device 1 in accordance with Example 2 still exhibits a radiation characteristic comparable to that of the antenna device in accordance with Reference Example which is configured so that the coaxial cable does not extend across the film antenna.
  • Fig. 14 is a graph showing (i) VSWR of the antenna device 1 in accordance with Example 3 and (ii) a frequency dependency of an average gain of the antenna device 1 in accordance with Example 3.
  • the antenna device 1 in accordance with Example 3 is obtained by configuring the antenna device 1 in accordance with Embodiment 2 so that a distance D1 and a distance D2 are 1.4 mm and 15.6 mm, respectively. That is, the antenna device 1 in accordance with Example 3 is configured so that the distance D1 is less than the distance D2.
  • the antenna device 1 in accordance with Example 3 and the antenna devices 1 in accordance with Examples 1 and 2 are identical except for the numerical values of the distance D1 and the distance D2.
  • Plotting of the VSWR shown in Fig. 14 indicates that the VSWR of the antenna device 1 in accordance with Example 3 is (i) approximately 2 in an 800 MHz band but (ii) not increased in a frequency band of 700 MHz or less.
  • the average gain of the entire polarized waves is considerably below -1dBi in the 800 MHz band.
  • a distance D2 is preferably equal to or greater than a distance D1. Note that similar results can be obtained in a case where the coaxial cable 20 held by the first holding part 34 does not extend across the film antenna 10 but part of the coaxial cable 20 is drawn frontwards (see Embodiment 4 described later).
  • FIG. 15 is a perspective view illustrating a support 30A included in the antenna device 1 ⁇ .
  • FIG. 15 is a perspective view illustrating the antenna device 1 ⁇ .
  • Fig. 16 is a flow chart showing a production method of producing the antenna device 1 ⁇ .
  • the antenna device 1 ⁇ in accordance with Embodiment 3 can be obtained by replacing the support 30 and the resin mold part 21 in the antenna device 1 in accordance with Embodiment 1 with a support 30A and a resin mold part 21A, respectively. Therefore, in Embodiment 3, the support 30A and the resin mold part 21A will be mainly described. Note that members similar to those of the antenna device 1 will be given the same reference numerals, and their descriptions will be omitted.
  • the support 30A has a third supporting surface 33 on which a first recess 37A, a second recess 38A, and an L-shaped groove 37B are provided.
  • the first and second recesses 37A and 38A correspond in configuration to the first and second recesses 37 and 38 of Embodiment 1, respectively.
  • the L-shaped groove 37B is a groove which is continuous with the first recess 37A and which extends toward an end part of the third supporting surface 33.
  • the L-shaped groove 37B serves as a vent through which air present in the first recess 37A is passed out.
  • the support 30A is a structure having (i) a first supporting surface 31, (ii) a second supporting surface 32 intersecting the first supporting surface 31, and (iii) a third supporting surface 33 facing the first supporting surface 31 and intersecting the second supporting surface 32, and a film antenna 10 is to be wound around the support 30A so as to come into contact with the first through third supporting surfaces 31 through 33.
  • the support 30A includes a first holding part 34, a second holding part 35, and a third holding part 36 for holding a coaxial cable 20 which is connected to the film antenna 10.
  • the coaxial cable 20 connected to the film antenna 10 is wired as is the case of the support 30 of the antenna device 1 in accordance with Embodiment 1.
  • the production method of producing the antenna device 1 ⁇ in accordance with Embodiment 3 includes (i) a connecting step of connecting the coaxial cable 20 to a feed section 14 of the film antenna 10 and (ii) the step of preparing the support 30A which (a) has: the first supporting surface 31; the second supporting surface 32 intersecting the first supporting surface 31; and the third supporting surface 33 facing the first supporting surface 31 and intersecting the second supporting surface 32, (b) includes the first and the second holding parts 34 and 35 (holding section) for holding the coaxial cable 20, and (c) is configured so that the first and second recesses 37A and 38A (recessed containing part) for containing the feed section 14 are provided in the third supporting surface 33.
  • the production method can further include (i) a winding step of: attaching the film antenna 10 to the support 30A so that the feed section 14 is contained in the first and second recesses 37A and 38A (recessed containing part); and winding the film antenna 10 around the support 30 so that the film antenna 10 comes into contact with the first supporting surface 31, the second supporting surface 32, and the third supporting surface 33 and (ii) a wiring step of wiring the coaxial cable 20 so that: the coaxial cable 20 is held by the first and the second holding parts 34 and 35 (holding section); and part of the coaxial cable 20 extends in a direction along the first supporting surface 31 and the second supporting surface 32.
  • the production method can further include a resin mold part forming step of (i) filling, with a liquid resin material, the first and second recesses 37A and 38A (recessed containing part) in which the feed section 14 is contained and (ii) hardening the liquid resin material so as to form the resin mold part 21A that covers the feed section 14 and covers the end part of the coaxial cable 20 which end part is connected to the feed section 14.
  • a resin mold part forming step of (i) filling, with a liquid resin material, the first and second recesses 37A and 38A (recessed containing part) in which the feed section 14 is contained and (ii) hardening the liquid resin material so as to form the resin mold part 21A that covers the feed section 14 and covers the end part of the coaxial cable 20 which end part is connected to the feed section 14.
  • the antenna device 1 ⁇ is produced by carrying out the resin mold part forming step (steps S102, S104, S106, S108) after carrying out the connecting step, the winding step, and the wiring step (step S100).
  • the resin mold part forming step includes (i) a jig setting step (step S102) of setting the support 30A, around which the film antenna 10 is wound, between a pair of fixing plates by which a jig 100 is constituted, (ii) a pressure adding step (step S104) of sandwiching the support 30A, around which the film antenna 10 is wound, with the pair of fixing plates and then adding a pressure, (iii) a filling step (step S106) of injecting a liquid resin material from an end part of the second recess 38A of the support 30A so as to fill the first recess 37A with the liquid resin material, and (iv) an extracting step (step S108) of hardening the liquid resin material filling the first recess 37A so as to form a resin mold part 21A and then taking out an antenna device 1 ⁇ from the jig 100.
  • a jig setting step step S102 of setting the support 30A, around which the film antenna 10 is wound, between a pair of
  • the support 30A is set between the pair of fixing plates by which the jig 100 is constituted.
  • the pair of fixing plates face corresponding ones of the first and third supporting surfaces 31 and 33 of the support 30A and
  • the support 30A is oriented so that the second holding part 35 of the support 30A faces upwards.
  • This causes the first and second recesses 37A and 38A provided in the third supporting surface 33 to be aligned vertically such that the end part of the second recess 38A, which is continuous with the first recess 37A, is located at an upper end of the support 30A.
  • the pair of fixing plates apply pressure to corresponding ones of the first supporting surface 31 and the third supporting surface 33 of the support 30A, around which the film antenna 10 is wound. This allows the film antenna 10 to be pressed against the support 30A with a more uniform pressure, so that the film antenna 10 comes into close contact with the first and third supporting surfaces 31 and 33. Therefore, in a case where the first recess 37A provided in the third supporting surface 33 is filled with the liquid resin material in the next step (step S106), it is possible to prevent the resin material from leaking out of the first recess 37A.
  • step S106 the liquid resin material is injected from the end part (upper end part) of the second recess 38A, so that the first recess 37A is filled with the liquid resin material.
  • the liquid resin material is injected through a gap between the second recess 38A and the coaxial cable 20. Therefore, in order to make it easy to inject the resin material through the gap, it is possible to, for example, inject the liquid resin material with the use of a tapered needle. Alternatively, in order to reduce the amount of time required for the filling, it is possible to, for example, inject the liquid resin material while pressure is applied.
  • step S108 the liquid resin material, with which the first recess 37A is filled, is hardened so as to form a resin mold part 21A which covers (i) the feed section 14 contained in the first recess 37A and (ii) the end part of the coaxial cable 20, which end part is connected to the feed section 14.
  • the pair of fixing plates with which the support 30A is sandwiched is taken out, and an antenna device 1 ⁇ is taken out of the jig 100.
  • a timing with which the antenna device 1 ⁇ is taken out of the jig 100 (i.e. a timing with which (i) the pressure applied in directions in which the support 30A was sandwiched is released and (ii) the pair of fixing plates is taken out) can be set as appropriate according to, for example, the amount of time required for hardening the resin, a viscosity of the resin, and air temperature.
  • Examples of the resin material of which the resin mold part 21A is made encompass, but are not limited to, a two-liquid-mixture type urethane resin (e.g. WEVOPUR PD 4 manufactured by WEVO-CHEMIE).
  • a two-liquid-mixture type urethane resin e.g. WEVOPUR PD 4 manufactured by WEVO-CHEMIE.
  • a resin mold part 21A which is made with the use of WEVOPUR PD 4 manufactured by WEVO-CHEMIE, is formed by hardening, at normal temperature, a liquid resin material with which the first recess 37A is filled at normal temperature. Therefore, the resin mold part 21A has such an advantage as causing less stress to be applied to the film antenna 10, in comparison with the resin mold part 21 of the antenna device 1 in accordance with Embodiment 1, formed by injection molding with the use of TECHNOMELT PUR 9515, manufactured by Henkel AG & Co. KGaA, which is a moisture curing urethane-based hot melt.
  • the resin mold part 21A made with the use of WEVOPUR PD 4 manufactured by WEVO-CHEMIE is small in degree of hardness, and therefore brings about such an advantage as being able to restrict peeling of the resin mold part 21A and the film antenna 10 from each other due to a difference in thermal expansion coefficient.
  • the production method in accordance with Embodiment 3 was described such that the connecting step, the winding step, and the wiring step are carried out before the resin mold part forming step is carried out.
  • the wiring step can be carried out after the resin mold part forming step has been carried out.
  • an antenna device is subjected to various temperature changes, and that various heat histories are added to an antenna device.
  • the support 30A, the film antenna 10, and the resin mold part 21A of the antenna device 1 ⁇ are made up of respective materials. Therefore, in a case where a heat history is added to the antenna device, an interface between the support 30A and the resin mold part 21A (first interface) and an interface between the resin mold part 21A and the film antenna 10 (second interface) are each subjected to stress due to differences in thermal expansion coefficient between the respective materials of which the support 30A, the film antenna 10, and the resin mold part 21A of the antenna device 1 ⁇ are made.
  • peeling ultimately occurs at any one of the first interface and the second interface. Whether the peeling occurs at the first interface or the second interface depends on (i) a balance between stress applied to the first interface and an adhesive force of the support 30A and the resin mold part 21A at the first interface and (ii) a balance between stress applied to the second interface and an adhesive force of the resin mold part 21A and the film antenna 10A at the second interface. In a case where the stress applied to the first interface is greater than the adhesive force of the support 30A and the resin mold part 21A, peeling occurs at the first interface. In a case where the stress applied to the second interface is greater than the adhesive force of the resin mold part 21A and the film antenna 10A, peeling occurs at the second interface.
  • the resin mold part 21A is intended to prevent the inner conductor and the outer conductor of the coaxial cable 20 and the feed section 14 from being exposed, so that a water-resistant property of the film antenna 10 is increased. Therefore, in a case where the resin mold part 21A and the film antenna 10 peel from each other at the second interface, the water-resistant property of the film antenna 10 unfortunately deteriorates. In contrast, in a case where the support 30A and the resin mold part 21A peel from each other at the first interface, the inner conductor and the outer conductor of the coaxial cable 20 and the feed section 14 remain covered with the resin mold part, so that the water-resistant property of the film antenna 10 is prevented from deteriorating.
  • An antenna device 1 ⁇ ' which is a variation of the antenna device 1 ⁇ , is an antenna device which is further intended to prevent deterioration of the water-resistant property of the film antenna by restricting the peeling of the resin mold part 21A and the film antenna 10 from each other at the second interface.
  • FIG. 17 is a plan view illustrating a third supporting surface 33 of a support 30B included in the antenna device 1 ⁇ '. More specifically, (a) of Fig. 17 is a plan view obtained when the third supporting surface 33 is viewed from the z-axis negative side in the coordinate system illustrated. (b) of Fig. 17 is an enlarged cross-sectional view illustrating the antenna device 1 ⁇ '. More specifically, (b) of Fig. 17 is an enlarged cross-sectional view of the resin mold part 21B taken along the line A-A' in (a) of Fig. 17 .
  • the antenna device 1 ⁇ ' is obtained by replacing the support 30A of the antenna device 1 ⁇ with the support 30B.
  • a first recess 37C, a second recess 38B, and a J-shaped groove (groove) 37D of the support 30B correspond to the first recess 37A, the second recess 38A, and the L-shaped groove 37B of the support 30A, respectively.
  • members similar to those of the support 30A will be given the same reference numerals, and their description will be omitted.
  • the support 30B is obtained by making the following changes to the support 30A.
  • a recessed containing part is formed by (i) the J-shaped groove 37D that is continuous with the first recess 37C and that serves as a vent through which air present in the first recess 37C is passed out, (ii) the first recess 37C, and (iii) the second recess 38B.
  • the shape of the cross section of the first recess 37C and the shape of the cross section of the J-shaped groove 37D will be described below with reference to (b) of Fig. 17 . Since the shape of the cross section of the first recess 37C and the shape of the cross section of the J-shaped groove 37D are similar, the shape of the cross section of the first recess 37C will be described. As illustrated in (b) of Fig. 17 , the shape of the cross section of the first recess 37C is configured so that the deeper the depth (i.e. distance along the z-axis in the coordinate system illustrated) from an opening made in the third supporting surface 33, the narrower the width (i.e. distance along the x-axis in the coordinate system illustrated). In other words, the width of the first recess 37C is (i) narrowest at a bottom part at which the depth from the opening is greatest, (ii) widest at the opening, and (iii) increasingly wider from the bottom part to the opening.
  • width of the first recess 37C can (i) change in any manner, provided that the width does not become narrower from the bottom part toward the opening and (ii) be partially unchanging relative to the depth from the opening.
  • the width of the first recess 37C is thus increasingly wider from the bottom part toward the opening. Therefore, a resin material, which is hardened after filling the first recess 37C and is to form the resin mold part 21B, can easily peel from the support 30B. Therefore, in a case where the antenna device 1 ⁇ ' is subjected to various temperature changes, the resin mold part 21B can easily peel from the support 30B at the first interface which is an interface between the support 30B and the resin mold part 21B. This prevents the resin mold part 21B from peeling from the film antenna 10 at the second interface which is an interface between the resin mold part 21B and the film antenna 10. Therefore, with the antenna device 1 ⁇ ', deterioration of the water-resistant property of the film antenna 10 can be more effectively prevented than is the case of the antenna device 1 ⁇ .
  • a surface of the first recess 37C is preferably smooth.
  • the resin material filling the first recess 37C may get into entire parts of the unevenness, so that an adhesive force occurring between the support 30B and the resin mold part 21B becomes strengthened (anchor effect).
  • anchor effect By configuring the surface of the first recess 37C to be as smooth as possible, it is possible to restrict an anchor effect, and therefore to restrict the adhesive force that occurs between the support 30B and the resin mold part 21B.
  • the resin mold part 21B In order to more reliably prevent the resin mold part 21B from peeling from the film antenna 10, it is possible to coat the surface of the first recess 37C with a release material before the first recess 37C is filled with the resin material. This allows the resin mold part 21B, which is made of a resin material, to easily peel from the surface of the first recess 37C.
  • a double-sided tape 33c which is an adhesive layer, is provided in the region surrounding the first recess 37C, the second recess 38B, and the J-shaped groove 37D that form the recessed containing part.
  • the adhesive layer can be an adhesive instead of a double-sided tape.
  • the film antenna 10 is attached to the third supporting surface of the support 30B with the use of the double-sided tape 33c. Therefore, in a filling step (step S106, see Fig. 16 ), a liquid resin material with which the first recess 37C is filled can easily prevented from flowing into a gap between the support 30B and the film antenna 10.
  • the first recess 37A is filled with a resin material while the support 30A is sandwich with the use of the jig 100 as in the step S106 shown in Fig. 16 .
  • the antenna device 1 ⁇ ' including the support 30B it is possible to fill the first recess 37C with a resin material even when the support 30B is not sandwiched with the use of a jig 100. That is, it is possible to omit a pressure adding step S104.
  • the J-shaped groove 37 instead of the L-shaped groove 37B is provided as a groove through which the inside of the first recess 37C and the outside of the support 30B are continuous.
  • the shape of the groove through which the inside of the first recess 37C and the outside of the support 30B are continuous is not limited to an L-shape or a J-shape, but can be another shape.
  • a production method of producing the antenna device 1 ⁇ ' differs from the production method of producing the antenna device 1 ⁇ in the points described below. Note that steps similar to those included in the production method of producing the antenna device 1 ⁇ will be given the same step number, and their descriptions will be omitted.
  • the production method further includes an adhesive layer forming step of forming an adhesive layer (double-sided tape 33c) in the region surrounding the recessed containing part (the first recess 37C, the second recess 38B, and the J-shaped groove 37D) of the third supporting surface 33.
  • the winding step further includes an attaching step of attaching, in a case where the film antenna 10 is to be wound around the support 30B, the film antenna 10 to the support 30B with the use of an adhesive layer (double-sided tape 33c).
  • the pressure adding step S104 can be omitted. Specifically, the jig 100 is not necessary to fill the first recess 37C with a resin material. Therefore, the antenna device 1 ⁇ ' can be produced with a few steps than is the case of the antenna device 1 ⁇ .
  • the antenna devices 1, 1 ⁇ , and 1 ⁇ in accordance with Embodiments 1 through 3 can be each suitably provided in a spoiler 52 of an automobile, particularly in a spoiler 52 having a housing divided into a containing part and a lid part.
  • a storing method of providing the antenna device 1 in accordance with Embodiment 1 into the spoiler 52 will be described below with reference to Fig. 18.
  • Fig. 18 is a view illustrating the storing method of providing the antenna device 1 in the spoiler 52. Note that in Fig. 18 , a shape of the antenna device 1 and a shape of the spoiler 52 are schematically illustrated so that the storing method can be easily recognized.
  • the spoiler 52 has a housing divided into a containing part 52a and a lid part 52b.
  • the containing part 52a includes a first compartment 52a1 and a second compartment 52a2 which are continuous with each other.
  • the first compartment 52a1 is a space in which mainly the support 30 of the antenna device 1 is to be provided.
  • the first compartment 52a1 is deeper in depth than the second compartment 52a2.
  • the second compartment 52a2 is a space in which mainly the film antenna 10 of the antenna device 1 is to be provided.
  • the second compartment 52a2 is shallower in depth than the first compartment 52a1.
  • the first compartment 52a1 and the second compartment 52a2 are opened upwards.
  • the antenna device 1 is to be provided in the first compartment 52a1 and the second compartment 52a2 from above.
  • the support 30 of the antenna device 1 is to be sandwiched with the support plates 52a3 and 52a4 in the first compartment 52a1.
  • elastic protrusions 39a1 and 39a2 which are provided on respective side walls that are right and left surfaces of the support 30, are engaged with corresponding openings provided in respective ones of the pair of support plates 52a3 and 52a4.
  • This causes a position of the support 30 in the first compartment 52a1 to be fixed, and therefore makes it unlikely for the support 30 to be detached from the support plates 52a3 and 52a4.
  • the film antenna 10 extending from the support 30 is provided in the second compartment 52a2 which is continuous with the first compartment 52a1.
  • the coaxial cable 20 drawn from the support 30 passes through a through-hole (not shown) made in a front-side wall of the first compartment 52a1, and is then drawn out of the first compartment 52a1.
  • the antenna device 1 is provided in the spoiler 52 as illustrated in (b) of Fig. 18
  • the first compartment 52a1 and the second compartment 52a2 are sealed with the lid part 52b as illustrated in (c) of Fig. 18 .
  • the antenna device 1 ⁇ in accordance with Embodiment 2 and the antenna device 1 ⁇ in accordance with Embodiment 3 can each be provided in the spoiler 52 by a method identical to the method by which the antenna device 1 in accordance with Embodiment 1 is provided in the spoiler 52.
  • Fig. 19 a configuration of an antenna device 1 ⁇ in accordance with Embodiment 4 of the present invention.
  • (a) of Fig. 19 is a perspective view illustrating the antenna device 1 ⁇ .
  • (b) of Fig. 19 is a plan view illustrating the antenna device 1 ⁇ .
  • the antenna device 1 ⁇ includes a film antenna 10, a coaxial cable 20, and a support 30.
  • the antenna device 1 ⁇ is obtained by making changes below to the antenna 1 in accordance with Embodiment 1.
  • the antenna device 1 in accordance with Embodiment 1 is configured so that the coaxial cable 20 extends widthwise across the film antenna 10 in the support 30 and the coaxial cable 20 is then drawn from the a side of the support 30, the antenna device 1 ⁇ in accordance with Embodiment 4 is configured so that the coaxial cable 20 is drawn from a front-side part of the support 30 without extending widthwise across the film antenna 10 in the support 30.
  • a recess 30a1 as a passage through which the coaxial cable 20 is to be drawn from the front-side part of the support 30, is provided at a center part of an upper end part of a side wall 30a which is a front-side surface of the support 30 and (ii) a third holding part 36 for holding the coaxial cable 20 drawn from the side of the support 30 is omitted.
  • the antenna device 1 in accordance with Embodiment 1 is configured so that the pair of elastic protrusions 39a1 and 39a2 for fixing the antenna device 1 to the spoiler 52 are provided on the right and left surfaces of the support
  • the antenna device 1 ⁇ in accordance with Embodiment 4 is configured so that the protrusions 39b1 and 39b2 for fixing the antenna device 1 to the spoiler 52 are provided in the vicinity of corresponding tips of a pair of elastic plates 39.
  • One of the pair of elastic plates 39, which corresponds to the protrusion 39b1 extends frontwards from a left-side surface of the second holding part 35.
  • the other one of the pair of elastic plates 39, which corresponds to the protrusion 39b2 extends frontwards from the front end part of the right-side surface of the support 30.
  • the antenna device 1 in accordance with Embodiment 1 is configured so that the bottom plate of the support 30, which is a bottom surface of the support 30, extends until it reaches the front-side surface of the support 30,
  • the antenna device 1 ⁇ in accordance with Embodiment 4 is configured so that a bottom plate of the support 30, which is a third supporting surface 33, extends frontwards beyond the front-side surface of the support 30.
  • the bottom plate serves as a support plate 33e for supporting the film antenna 10.
  • steps 33e1 and 33e2 are provided, respectively, so that a width of the support plate 33e further frontwards than the steps 33e1 and 33e2 is wider than a width of the support plate 33e further backwards than the steps 33e1 and 33e2.
  • the antenna device 1 in accordance with Embodiment 1 is designed so as to be provided in the spoiler 52 having a housing divided into the containing part and a lid part
  • the antenna device 1 ⁇ in accordance with Embodiment 4 is designed so as to be provided in a spoiler 52 having a housing having an insertion slot.
  • the changes above are based on the difference in the storing method of providing the antenna device in the spoiler 52. Note that a method of providing the antenna device 1 ⁇ in accordance with Embodiment 4 into the spoiler 52 having a housing having an insertion slot will be described later with reference to another drawing.
  • the antenna device 1 ⁇ in accordance with Embodiment 4 can be suitably provided in a spoiler 52 of an automobile, particularly in a spoiler 52 having a housing having an insertion slot.
  • a storing method of providing the antenna device 1 ⁇ in accordance with Embodiment 4 into such a spoiler 52 will be described below with reference to Fig. 20.
  • Fig. 20 is a view illustrating the storing method of providing the antenna device 1 ⁇ into the spoiler 52. Note that in Fig. 20 , a shape of the antenna device 1 ⁇ and a shape of the spoiler 52 are schematically illustrated so that the storing method can be easily recognized.
  • the spoiler 52 has such a shape that a top plate 52d, which is a top surface of the housing, is jutting frontwards beyond a side wall which is a front surface of the housing.
  • the housing has a compartment in which the support 30 of the antenna device 1 ⁇ is to be provided.
  • the side wall which is the front surface of the housing, has an insertion slot 52c through which the support 30 of the antenna device 1 ⁇ is to be inserted into the housing.
  • L-shaped protrusions 52d1 and 52d2 for holding the support plate 33e of the antenna device 1 ⁇ are provided.
  • the antenna device 1 ⁇ is to be provided in the spoiler 52 as follows.
  • the support plate 33e of the antenna device 1 ⁇ is made to come into contact with the top plate 52d of the spoiler 52.
  • a part of the support plate 33e which part is located further backwards than the steps 33e1 and 33e2 and whose width is narrow, is passed through a space between the L-shaped protrusions 52d1 and 52d2. This allows the support plate 33e to come into contact with the top plate 52d without causing the support plate 33e to collide with the L-shaped protrusions 52d1 and 52d2.
  • the antenna device 1 ⁇ can be pulled out of the spoiler 52 after parts 39c1 and 39c2 of the elastic plates 39, which parts 39c1 and 39c2 are located further frontwards than the protruding parts 39b1 and 39b2, are pressed inwards so that the elastic plates 39 are bent inwards and therefore the protruding parts 39b1 and 39b2 do not become hooked to the side wall which is the front surface of the housing of the spoiler 52.
  • an antenna device in accordance with an embodiment of the present invention includes: a film antenna; a cable which is connected to a feed section of the film antenna; and a support, around which at least part of the film antenna is wound, the support including a holding section for holding the cable.
  • the film antenna is wound around the support. This restricts a change in three-dimensional structure of the antenna conductor included in the film antenna. That is, it is possible to allow the antenna device to have a more stable an antenna characteristic.
  • the cable is held by the support. This allows the antenna device to have greater durability with respect to pulling of the cable.
  • the support functions to allow the antenna device to have a more stable antenna characteristic and greater durability with respect to pulling of the cable. This allows the antenna device to have a more stable antenna characteristic and greater durability with respect to pulling of the cable without causing the structure to be complicated or larger.
  • winding a film antenna around a support means that the film antenna is deformed so as be guided along surfaces of the support, so that the film antenna is prevented from being detached from the support.
  • the expression above does not only contain the meaning of winding the film antenna around the support one turn or more.
  • examples of the forms meant by the expression encompass: (i) a form in which the film antenna is deformed so as to be guided along 4 surfaces (e.g.
  • top surface, right-side surface, bottom surface, left-side surface) of the support so that the film antenna is prevented from being detached from the support
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the support has a first supporting surface, a second supporting surface intersecting the first supporting surface, and a third supporting surface facing the first supporting surface and intersecting the second supporting surface; the film antenna is wound around the support so as to be in contact with the first supporting surface, the second supporting surface, and the third supporting surface; and the holding section includes a first holding part for holding the cable so that part of the cable extends in a direction along the first supporting surface and the second supporting surface.
  • the film antenna is wound around the support so as to be in contact with the three supporting surfaces above. This makes it possible to further restrict a change in three-dimensional structure of the antenna conductor included in the film antenna.
  • the antenna characteristic can be made more stable.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that the first holding part is provided so as to protrude frontwards further than an end part of the first supporting surface, which end part is located opposite an end part located toward the second supporting surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the film antenna includes a first antenna conductor connected to a hot side conductor of the cable and a second antenna conductor connected to a cold side conductor of the cable; the film antenna is wound around the support so that (i) a main part of the first antenna conductor is guided along the first supporting surface and (ii) a main part of the second antenna conductor is guided along the third supporting surface; and the part of the cable, which part extends in the direction along the first supporting surface and the second supporting surface, is held by the first holding part so that a first distance between the part and the first supporting surface is equal to a second distance between the part and the third supporting surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that the film antenna includes a first antenna conductor connected to a hot side conductor of the cable and a second antenna conductor connected to a cold side conductor of the cable; the film antenna is wound around the support so that (i) a main part of the first antenna conductor is guided along the first supporting surface and (ii) a main part of the second antenna conductor is guided along the third supporting surface; and the part of the cable, which part extends in the direction along the first supporting surface and the second supporting surface, is held by the first holding part so that a first distance between the part and the first supporting surface is equal to or greater than a second distance between the part and the third supporting surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that the holding section further includes a second holding part for holding the cable so that part of the cable is guided along the first supporting surface and extends in a direction that intersects the second supporting surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that the second holding part is provided outside of a spatial region sandwiched between (i) a region of the film antenna, which region is in contact with the first supporting surface and (ii) a region of the film antenna, which region is in contact with the third supporting surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the second holding part has a recess whose opening faces a first direction which an opening of a recessed containing part provided in the third supporting surface faces; and the first holding part has a recess whose opening faces a second direction opposite the first direction.
  • the antenna device With the configuration, it is possible to allow the antenna device to have greater durability with respect to pulling of the cable.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that part of the cable, which part is held by the first holding part and the second holding part, extends (i) between the first holding part and the second holding part and (ii) in a direction that intersects the first supporting surface and the third supporting surface.
  • the antenna device With the configuration, it is possible to allow the antenna device to have greater durability with respect to pulling of the cable.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that a surface of the second holding part, which surface is in contact with a bent part of the cable, is a smooth curved surface.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the film antenna is folded in a U shape so as to be in contact with the first supporting surface, the second supporting surface, and the third supporting surface of the support; a guide ring is provided at an end part of the third supporting surface, which end part is located opposite an end part located toward the second supporting surface; and the film antenna passes through the guide ring and is supported by the guide ring.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the feed section and the cable are connected via a connection part which is covered with a resin mold part; and the support has a recessed containing part in which the resin mold part is contained.
  • connection part via which the feed section and the cable are connected is covered with the resin mold part, and the cable is held by the support. This allows the antenna device to have greater durability with respect to pulling of the cable.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the resin mold part includes a first covering part and a second covering part which are provided on a front surface and a back surface of the film antenna, respectively; and the first covering part and the second covering part are continuous via an opening made in the film antenna.
  • the antenna device in accordance with an aspect of the present invention is preferably configured so that: the recessed containing part is provided in a part of the third supporting surface, which part is located in the vicinity of a boundary between the third supporting surface and the second supporting surface; the film antenna is wound around the support so that the first covering part of the resin mold part is contained in the recessed containing part; and the first covering part and the second covering part of the resin mold part each become thinner in thickness toward a bent part of the film antenna, which bent part is bent along the boundary between the third supporting surface and the second supporting surface.
  • the first covering part and the second covering part are each prevented, over a long period of time, from peeling from the film antenna even in a case of a configuration in which the resin mold part is located in the vicinity of the bent part of the film antenna when, for example, the film antenna, in which the connection part of the cable and the feed section is covered with the resin mold part, is wound around the support. It is therefore possible to maintain a water-resistant property of the antenna device at a high level over a long period of time. This is because of the following reason.
  • first covering part and the second covering part each become thinner in thickness toward the bent part of the film antenna. This causes the first covering part and the second covering part to be more bendable toward the bent part. Therefore, stress derived from the folding can be reduced, and it is therefore possible to prevent the stress from becoming concentrated on edges of the first covering part and of the second covering part, which edges are located in the vicinity of the bent part.
  • An antenna device production method in accordance with an aspect of the present invention is a method of producing an antenna device, the method including the steps of: (a) connecting a cable to a feed section of a film antenna; (b) forming a resin mold part which covers the feed section and covers an end part of the cable, which end part is connected to the feed section; (c) preparing a support which (i) has: a first supporting surface; a second supporting surface intersecting the first supporting surface; and a third supporting surface facing the first supporting surface and intersecting the second supporting surface, (ii) includes a holding section for holding the cable, and (iii) has, in the third supporting surface, a recessed containing part for containing the resin mold part; (d) attaching the film antenna to the support so that the resin mold part is contained in the recessed containing part and winding the film antenna around the support so that the film antenna comes into contact with the first supporting surface, the second supporting surface, and the third supporting surface; and (e) wiring the cable so that: the cable is held by the
  • An antenna device production method in accordance with an aspect of the present invention is a method of producing an antenna device, the method including the steps of: (a) connecting a cable to a feed section of a film antenna; (b) preparing a support which (i) has: a first supporting surface; a second supporting surface intersecting the first supporting surface; and a third supporting surface facing the first supporting surface and intersecting the second supporting surface, (ii) includes a holding section for holding the cable, and (iii) has, in the third supporting surface, a recessed containing part for containing the feed section; (c) attaching the film antenna to the support so that the feed section is contained in the recessed containing part and winding the film antenna around the support so that the film antenna comes into contact with the first supporting surface, the second supporting surface, and the third supporting surface; (d) wiring the cable so that: the cable is held by the holding section; and part of the cable extends in a direction along the first supporting surface and the second supporting surface; and (e) forming, by filling the
  • the antenna device production method in accordance with an aspect of the present invention preferably further includes the step of: forming, before the step of attaching and winding the film antenna is carried out, an adhesive layer in a region surrounding the recessed containing part of the third supporting surface.
  • the step of attaching and winding the film antenna preferably further includes the step of attaching, in a case where the film antenna is to be wound around the support, the film antenna to the support with use of the adhesive layer.
  • the support and the film antenna are attached to each other by the adhesive layer in the region surrounding a contour of the recessed containing part.

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Claims (10)

  1. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) umfassend:
    eine Folienantenne (10, 10α);
    ein Kabel (20), das mit einem Einspeisungsabschnitt (14) der Folienantenne (10, 10α) verbunden ist; und
    einen Träger (30, 30α, 30A), um den wenigstens ein Teil der Folienantenne (10, 10α) gewickelt ist,
    wobei der Träger (30, 30α, 30A, 30B) einen Halteabschnitt zum Halten des Kabels (20) aufweist,
    dadurch gekennzeichnet, dass
    der Träger (30, 30α, 30A, 30B) Folgendes besitzt:
    eine erste Auflagefläche (31),
    eine zweite Auflagefläche (32), die die erste Auflagefläche (31) schneidet, und
    eine dritte Auflagefläche (33), die der ersten Auflagefläche (31) gegenüberliegt und
    die zweite Auflagefläche (32) schneidet;
    wobei die Folienantenne (10, 10α) so um den Träger (30, 30α, 30A, 30B) gewickelt ist, dass sie mit der ersten Auflagefläche (31), der zweiten Auflagefläche (32) und der dritten Auflagefläche (33) in Kontakt steht;
    wobei der Halteabschnitt ein erstes Halteteil (34) zum Halten des Kabels (20) aufweist, so dass sich ein Teil des Kabels (20) in einer Richtung entlang der ersten Auflagefläche (31) und der zweiten Auflagefläche (32) erstreckt, und
    wobei der Einspeisungsabschnitt (14) einen ersten Anschlusspunkt (14a) aufweist, an dem ein heißseitiger Leiter des Kabels mit der Folienantenne (10, 10α) verbunden ist, und einen zweiten Anschlusspunkt (14b), an dem ein kaltseitiger Leiter des Kabels mit der Folienantenne (10, 10α) verbunden ist.
  2. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 1, wobei das erste Halteteil (34) so in dem Träger (30, 30α, 30A, 30B) vorgesehen ist, dass es über einen Rand der ersten Auflagefläche (31) vorspringt, wobei dieser Rand einem in Richtung zu der zweiten Auflagefläche (32) gelegenen Rand gegenüberliegt.
  3. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 1 oder 2, wobei:
    die Folienantenne (10, 10α) Folgendes aufweist:
    einen ersten Antennenleiter (12), der mit dem heißseitigen Leiter des Kabels (20) verbunden ist, und
    einen zweiten Antennenleiter (13), der mit dem kaltseitigen Leiter des Kabels (20) verbunden ist;
    wobei die Folienantenne (10, 10α) so um den Träger (30, 30α, 30A, 30B) gewickelt ist, dass (i) ein Hauptteil des ersten Antennenleiters (12) entlang der ersten Auflagefläche (31) und der zweiten Auflagefläche (32) geführt ist und (ii) ein Hauptteil des zweiten Antennenleiters (13) entlang der dritten Auflagefläche (33) geführt ist; und
    der Teil des Kabels (20), der sich in der Richtung entlang der ersten Auflagefläche (31) und der zweiten Auflagefläche (32) erstreckt, durch das erste Halteteil (34) gehalten wird, so dass ein erster Abstand zwischen dem Teil und der ersten Auflagefläche (31) gleich einem zweiten Abstand zwischen dem Teil und der dritten Auflagefläche (33) ist.
  4. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 1 oder 2, wobei:
    die Folienantenne (10, 10α) einen ersten Antennenleiter (12) aufweist, der mit dem heißseitigen Leiter des Kabels (20) verbunden ist, und einen zweiten Antennenleiter (13), der mit dem kaltseitigen Leiter des Kabels (20) verbunden ist;
    die Folienantenne (10, 10α) so um den Träger (30, 30α, 30A, 30B) gewickelt ist, dass (i) ein Hauptteil des ersten Antennenleiters (12) entlang der ersten Auflagefläche (31) und der zweiten Auflagefläche (32) geführt wird und (ii) ein Hauptteil des zweiten Antennenleiters (13) entlang der dritten Auflagefläche (33) geführt wird; und
    der Teil des Kabels (20), der sich in der Richtung entlang der ersten Auflagefläche (31) und der zweiten Auflagefläche (32) erstreckt, durch das erste Halteteil (34) gehalten wird, so dass ein erster Abstand zwischen dem Teil und der ersten Auflagefläche (31) gleich oder größer ist als ein zweiter Abstand zwischen dem Teil und der dritten Auflagefläche (33).
  5. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach einem der Ansprüche 1 bis 4, wobei der Halteabschnitt ferner ein zweites Halteteil (35) zum Halten des Kabels (20) aufweist, so dass ein Teil des Kabels (20) entlang der ersten Auflagefläche (31) geführt wird und sich in einer Richtung erstreckt, die die zweite Auflagefläche (32) schneidet.
  6. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 5, wobei das zweite Halteteil (35) außerhalb eines räumlichen Bereichs vorgesehen ist, der sandwichartig zwischen (i) einem Bereich der Folienantenne (10, 10α), der mit der erste Auflagefläche (31) in Kontakt steht, und (ii) einem Bereich der Folienantenne (10, 10α) angeordnet ist, der mit der dritten Auflagefläche (33) in Kontakt steht.
  7. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 5 oder 6, wobei:
    das zweite Halteteil (35) eine zweite Ausnehmung (35b) besitzt;
    die zweite Ausnehmung (35b) eine Öffnung besitzt, die in einer ersten Richtung geöffnet ist;
    wobei eine Öffnung eines eingelassenen Aufnahmeteils (37, 37A, 38, 38A) in der dritten Auflagefläche (33) in einer ersten Richtung geöffnet ist,
    das erste Halteteil (34) eine erste Ausnehmung (34b) besitzt, und
    die erste Ausnehmung (34b) eine Öffnung besitzt, die in einer der ersten Richtung entgegengesetzten zweiten Richtung geöffnet ist.
  8. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 7, wobei ein Teil des Kabels (20), der durch das erste Halteteil (34) und das zweite Halteteil (35) gehalten wird,
    (i) sich zwischen dem ersten Halteteil (34) und dem zweiten Halteteil (35) erstreckt und
    (ii) sich in einer Richtung erstreckt, die die erste Auflagefläche (31) und die dritte Auflagefläche (33) schneidet.
  9. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach Anspruch 8, wobei eine Oberfläche des zweiten Halteteils (35), die mit einem gebogenen Teil des Kabels (20) in Kontakt steht, eine glatte gekrümmte Fläche ist.
  10. Antennenvorrichtung (1, 1α, 1β, 1β', 1γ) nach einem der Ansprüche 1 bis 9, wobei:
    die Folienantenne (10, 10α) zu einer U-Form gefaltet ist, um mit der ersten Auflagefläche (31), der zweiten Auflagefläche (32) und der dritten Auflagefläche (33) des Trägers (30, 30α, 30A, 30B) in Kontakt zu stehen;
    ein Führungsring an einem Endstück der dritten Auflagefläche (33) vorgesehen ist, wobei das Endstück einem in Richtung zu der zweiten Auflagefläche (32) gelegenen Endstück gegenüberliegt; und
    die Folienantenne (10, 10α) durch den Führungsring (33c) verläuft und von dem Führungsring (33c) getragen wird.
EP16838078.0A 2015-09-11 2016-09-12 Antennenvorrichtung Not-in-force EP3182508B1 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2015179944 2015-09-11
JP2015228125 2015-11-20
JP2016117497A JP6595409B2 (ja) 2015-09-11 2016-06-13 アンテナ装置の製造方法
JP2016117495 2016-06-13
JP2016117496A JP6595408B2 (ja) 2015-09-11 2016-06-13 アンテナ装置及びその製造方法
PCT/JP2016/076871 WO2017043663A1 (ja) 2015-09-11 2016-09-12 アンテナ装置

Publications (3)

Publication Number Publication Date
EP3182508A1 EP3182508A1 (de) 2017-06-21
EP3182508A4 EP3182508A4 (de) 2018-05-02
EP3182508B1 true EP3182508B1 (de) 2019-05-22

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ID=58701334

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Application Number Title Priority Date Filing Date
EP16838078.0A Not-in-force EP3182508B1 (de) 2015-09-11 2016-09-12 Antennenvorrichtung

Country Status (1)

Country Link
EP (1) EP3182508B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4664213B2 (ja) * 2005-05-31 2011-04-06 富士通コンポーネント株式会社 アンテナ装置
JP2007074226A (ja) * 2005-09-06 2007-03-22 Alps Electric Co Ltd 車載用アンテナ装置
JP5458981B2 (ja) * 2009-03-24 2014-04-02 カシオ計算機株式会社 マルチバンドアンテナ及び電子機器
JP5579571B2 (ja) * 2010-10-26 2014-08-27 株式会社マキタ 電源コードの配設構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP3182508A4 (de) 2018-05-02
EP3182508A1 (de) 2017-06-21

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