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EP2672565A1 - Glasintegrierte antenne und für ein fahrzeug verwendbare verglasung damit - Google Patents

Glasintegrierte antenne und für ein fahrzeug verwendbare verglasung damit Download PDF

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Publication number
EP2672565A1
EP2672565A1 EP12741960.4A EP12741960A EP2672565A1 EP 2672565 A1 EP2672565 A1 EP 2672565A1 EP 12741960 A EP12741960 A EP 12741960A EP 2672565 A1 EP2672565 A1 EP 2672565A1
Authority
EP
European Patent Office
Prior art keywords
linear conductor
feeding portion
conductor
antenna
glass
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.)
Granted
Application number
EP12741960.4A
Other languages
English (en)
French (fr)
Other versions
EP2672565B1 (de
EP2672565A4 (de
Inventor
Jun Noda
Hiroyuki Hayakawa
Takeshi MUROFUSHI
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.)
AGC Inc
Original Assignee
Asahi Glass Co 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
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of EP2672565A1 publication Critical patent/EP2672565A1/de
Publication of EP2672565A4 publication Critical patent/EP2672565A4/de
Application granted granted Critical
Publication of EP2672565B1 publication Critical patent/EP2672565B1/de
Active 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
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/40—Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements
    • 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
    • H01Q9/42—Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength

Definitions

  • the present invention relates to a glass antenna arranged at a glass plate.
  • the present invention also relates to a window glass for vehicle having the glass antenna.
  • DAB Digital Audio Broadcasting
  • Band III having a frequency range of 174 to 240 MHz
  • L-Band having a frequency range of 1452 to 1492 MHz.
  • a glass antenna arranged at a glass plate includes a first feeding portion, a second feeding portion that is aligned with the first feeding portion, and an antenna conductor including a first antenna element that is connected to the first feeding portion and a second antenna element that is connected to the second feeding portion.
  • One of the first feeding portion or the second feeding portion is a signal-side feeding portion, and the other one of the first feeding portion or the second feeding portion is a ground-side feeding portion.
  • the first antenna element includes an F-shaped element that is formed into an F-shape by a first linear conductor having one end connected either directly or via a connection conductor to the first unit and extending in a horizontal direction, a second linear conductor extending in a vertical direction from another end of the first linear conductor as an origin, and a third linear conductor extending in the same direction as the second linear conductor from an intermediate point of the first linear conductor as an origin.
  • the second antenna element includes an L-shaped element that is formed into an L-shape by a fourth linear conductor having one end connected either directly or via a connection conductor to the second feeding portion and extending in a horizontal direction on a side of the first linear conductor from which the second linear conductor extends and a fifth linear conductor extending in a vertical direction from another end of the fourth linear conductor as an origin.
  • a window glass includes the glass antenna of the present invention.
  • a glass antenna having high reception sensitivity that can be used for a dual-band such as the DAB may be provided.
  • plan views each illustrate a glass antenna as seen from a side facing a glass surface. It is noted that although the plan views correspond to views from inside a vehicle when a window glass including a glass antenna of the present invention is installed in the vehicle, the plan views may also be regarded as views from outside the vehicle.
  • vertical directions in the plan views correspond to vertical directions of the vehicle
  • a downside direction in the drawings correspond to a direction toward the road surface.
  • right-left directions in the drawings correspond to front-back directions of the vehicle.
  • the present invention is not limited to being arranged at a side window of a vehicle and may also be arranged at a rear window mounted at the rear side of a vehicle, a windshield mounted at the front side of a vehicle, or a window glass other than that of a vehicle (e.g., window glass of a building, window glass of a vessel, etc.).
  • FIG. 1 is a plan view of a glass antenna 100 for a vehicle according to a first embodiment of the present invention.
  • FIG. 2 is a plan view of a glass antenna 200 for a vehicle according to a second embodiment of the present invention.
  • the glass antennas 100 and 200 are configured to be arranged at a window glass 23 corresponding to a side window of a vehicle. It is noted that FIGS. 1 and 2 are views from the interior of a vehicle and the left sides of FIGS. 1 and 2 correspond to the rear side of the vehicle.
  • a glass antenna according to the present invention includes a first feeding portion, a second feeding portion that is aligned with the first feeding portion, and an antenna conductor that are arranged at a window glass.
  • the antenna conductor includes a first antenna element that is connected to the first feeding portion and a second antenna element that is connected to the second feeding portion.
  • the first feeding portion may be a signal-side feeding portion that is electrically connected to a signal path of an external signal processing unit (e.g., vehicle-mounted amplifier) via a predetermined first conductive member and is made of a conductor having a predetermined area for enabling connection with the first conductive member
  • the second feeding portion may be a ground-side feeding portion that is electrically connected to an external ground path (e.g., ground of the signal processing unit or the vehicle body) via a predetermined second conductive member and is made of a conductor having a predetermined area for enabling connection with the second conductive member.
  • the first feeding portion and the second feeding portion comprise a feeding point of the antenna conductor.
  • the glass antennas 100 and 200 illustrated in FIGS. 1 and 2 correspond to dipole antennas that are arranged into planar configurations at their corresponding window glasses 23.
  • the glass antennas 100 and 200 each include an antenna conductor, a signal-side feeding portion 16, and a ground-side feeding portion 17.
  • the signal-side feeding portion 16 and the ground-side feeding portion 17 are arranged to be vertically spaced apart from one another along a rim 23a of the window glass 23, the signal-side feeding portion 16 being positioned at the upper side and the ground-side feeding portion 17 being positioned at the lower side.
  • the glass antennas 100 and 200 each include as patterns of the antenna conductor at least a first antenna element connected to the signal-side feeding portion 16 and a second antenna element connected to the ground-side feeding portion 17. It is noted that in other embodiments, the positions of the signal-side feeding portion 16 and the ground-side feeding portion 17 may be reversed, or the signal-side feeding portion 16 and the ground-side feeding portion 17 may be spaced apart in the horizontal direction, for example.
  • the first antenna element includes an F-shaped element that is formed into an F-shape by a first linear conductor having one end connected either directly or via a connection conductor to the signal-side feeding portion 16 and extending in a horizontal direction, a second linear conductor extending in a vertical direction from the other end of the first linear conductor as an origin, and a third linear conductor extending in the same direction as the second linear conductor from an intermediate point of the first linear conductor as an origin.
  • the second linear conductor and the third linear conductor may extend in a direction substantially perpendicular to the extending direction of the first linear conductor to form the F-shaped element.
  • a linear conductor 1 as an exemplary embodiment of the first linear conductor extends linearly in the leftward direction from end "a" connected to the signal-side feeding portion 16 as an origin
  • a linear conductor 2 as an exemplary embodiment of the second linear conductor extends linearly in the downward direction from end "c" corresponding to the left side extending end of the linear conductor 1 as an origin
  • a linear conductor 3 as an exemplary embodiment of the third linear conductor extends linearly in the downward direction from an intermediate point "b" of the leftward extending linear conductor 1 as an origin.
  • the linear conductor 2 extends downward to end “d”
  • the linear conductor 3 extends downward to end "e”. It is noted that the intermediate point "b” corresponds to a point between end "a” and end "c” of the linear conductor 1.
  • the second antenna element includes an L-shaped element that is formed into an L-shape by a fourth linear conductor and a fifth linear conductor.
  • the fourth linear conductor has one end connected either directly or via a connection conductor to the ground-side feeding portion 17 and extends horizontally on a side of the first linear conductor from which the second linear conductor extends.
  • the fifth linear conductor extends vertically between the second linear conductor and the third linear conductor from the other end of the fourth linear conductor as an origin.
  • the fifth linear conductor may extend in a direction substantially perpendicular to the extending direction of the fourth linear conductor to form the L-shaped element.
  • a linear conductor 4 as an exemplary embodiment of the fourth linear conductor extends linearly in the leftward direction at the lower side of the linear conductor 1 (linear conductor 2 extending direction side) from end "f" connected to the ground-side feeding portion 17 as an origin
  • a linear conductor 5 as an exemplary embodiment of the fifth linear conductor extends upward between the linear conductor 2 and the linear conductor 3 from end "h" corresponding to the left side extending end of the linear conductor 4 as an origin.
  • the linear conductor 5 extends upward to end "i".
  • a linear conductor 7 is illustrated as a connection conductor that connects the linear conductor 4 to the ground-side feeding portion 17.
  • the linear conductor 7 extends linearly in the downward direction from end “g” connected to the ground-side feeding portion 17 as an origin.
  • the linear conductor 7 is configured to connect end “g" to end “f” corresponding to one end of linear conductor 4. It is noted that the linear conductor 7 does not necessarily have to extend vertically downward and may alternatively extend diagonally toward the lower left side from end "g" connected to the ground-side feeding portion 17, for example.
  • FIG. 2 illustrates an exemplary arrangement in which end "f" of the linear conductor 4 is connected to the ground-side feeding portion 17 via the linear conductor 7, in other alternative arrangements, end “a" of the linear conductor 1 may be connected to the signal-side feeding portion 16 via a connection conductor, for example.
  • the first antenna element of the glass antennas 100 and 200 may include a sixth linear conductor that is connected to end "c" corresponding to the other end of the first linear conductor and extends in a horizontal direction.
  • a linear conductor 6 as an exemplary embodiment of the sixth linear conductor extends linearly in the horizontal direction from end "c" of the linear conductor 1 as an origin.
  • the linear conductor 6 extends in the leftward direction to end "j".
  • the antenna conductor illustrated in FIGS 1 and 2 has the first antennal element and the second antenna element extending in the leftward direction
  • the first antenna element and the second antenna element may alternatively be arranged to extend in the rightward direction. That is, the arrangements of FIGS. 1 and 2 may be rearranged to be horizontally line-symmetric with respect to the signal-side feeding portion.
  • the positions of the signal-side feeding portion, the first antenna element, the ground-side feeding portion, and the second antenna element may alternatively be reversed. That is, the arrangements of FIGS. 1 and 2 may be rearranged to be line-symmetric or point-symmetric with respect to the signal-side feeding portion.
  • broadcasting frequency bands to be received include a predetermined first broadcasting frequency band and a predetermined second broadcasting frequency band that is lower than the first broadcasting frequency band.
  • ⁇ 01 represents the wavelength in air of the central frequency of the first broadcasting frequency band
  • the conductor length L3 of the linear conductor 3 is preferably arranged to be greater than or equal to 30 mm, and more preferably greater than or equal to 40 mm. Also, in consideration of the occupying area of the glass antenna, the conductor length L3 is preferably arranged to be less than or equal to 80 mm.
  • the broadcasting frequency bands to be received include the predetermined first broadcasting frequency band and the predetermined second broadcasting frequency band that is lower than the first broadcasting frequency band.
  • ⁇ 02 represents the wavelength in air of the central frequency of the second broadcasting frequency band
  • the conductor length L5 of the linear conductor 5 is preferably arranged to be greater than or equal to 30 mm, and more preferably, greater than or equal to 40 mm. Increasing the conductor length L5 may be particularly effective in improving the antenna gain for a high frequency band from 200 MHz and higher of the Band III frequency band. Also, it is noted that in consideration of the occupying area of the glass antenna, the conductor length L5 is preferably arranged to be less than or equal to 80 mm.
  • the conductor length L2 of the linear conductor 2 corresponding to the second linear conductor, which is a vertical component of the first antenna element is arranged to be greater than or equal to 30 mm and less than or equal to 120 mm, provided the conductor length 2 is confined within a range that keeps the linear conductor 2 from coming into contact with other conductors and within a range that keeps the linear conductor 2 from extending outside the window glass 23.
  • the conductor length L2 is more preferably arranged to be greater than or equal to 30 mm and less than or equal to 100 mm.
  • favorable results may be obtained in terms of improving the antenna gain for L-Band when the conductor length L2 is arranged to be greater than or equal to 40 mm and less than or equal to 100 mm.
  • FIG. 3 is a plan view of a glass antenna 300 for a vehicle according to a third embodiment of the present invention.
  • FIG. 4 is a plan view of a glass antenna 400 for a vehicle according to a fourth embodiment of the present invention. It is noted that features of the third and fourth embodiments and advantages achieved by these features that are identical to those of the above-described embodiments are omitted.
  • the positions of the linear conductors 2, 3, and 5 are altered from those of the glass antenna 200 illustrated in FIG. 2 .
  • the linear conductors 2 and 3 that are connected to the signal-side feeding portion 16 via the linear conductor 1 are arranged to extend vertically at a region on a side of the linear conductor 5 that is opposite a side on which the signal-side feeding portion 16 and the ground-side feeding portion 17 are arranged of the linear conductor 5 that is connected to the ground-side feeding portion 17 via the linear conductors 4 and 7.
  • the linear conductor 5 is arranged to extend vertically at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductors 2 and 3.
  • the linear conductors 2 and 3 that are connected to the signal-side feeding portion 16 via the linear conductor 1 are arranged to extend vertically at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductor 5 that is connected to the ground-side feeding portion 17 via the linear conductors 4 and 7.
  • the linear conductor 5 is arranged to extend vertically at a region on a side opposite the side on which the signal-side feeding portion 16 and the ground-side feeding portion 17 are arranged with respect to the linear conductors 2 and 3.
  • the antenna conductors illustrated in FIGS. 3 and 4 have the first antenna element and the second antenna element extending in the leftward direction
  • the first antenna element and the second antenna element may alternatively be arranged to extend in the rightward direction. That is, the first antenna element and the second antenna element illustrated in FIGS. 3 and 4 may be rearranged to be line-symmetrical with respect to the signal-side feeding portion.
  • the arrangement of the signal-side feeding portion, the first antenna element, the ground-side feeding portion, and the second antenna element may be reversed vertically. That is, the arrangements illustrated in FIGS. 3 and 4 may be rearranged to be line-symmetrical in the vertical direction or point-symmetrical with respect to the signal-side feeding portion.
  • reception characteristics compatible with a dual-band such as the DAB may be obtained.
  • the glass antenna at the window glass 23 in a manner such that at least one or more of the linear conductors that extend in the upward or downward direction such as the linear conductor 2, the linear conductor 3, the linear conductor 5, and/or the linear conductor 7 includes a vertical component that is perpendicular to the ground surface (i.e., horizontal plane), reception sensitivity for the radio wave of a vertical polarization wave of a dual-band such as the DAB may be further improved.
  • the mounting angle at which the window glass 23 is mounted to the vehicle is preferably arranged to be 30 to 90 degrees, and more preferably 60 to 90 degrees with respect to the ground surface.
  • a feeder cable such an AV cable or a coaxial cable may be used, for example.
  • the internal conductor of the coaxial cable may be electrically connected to the signal-side feeding portion 16, and the external conductor of the coaxial cable may be electrically connected to the ground-side feeding portion 17.
  • a male connector may be attached to the front end of the coaxial cable and a female connector may be mounted to the signal-side feeding portion 16 and the ground-side feeding portion 17.
  • protruding conductive members may be arranged at the signal-side feeding portion 16 and the ground-side feeding portion 17 so that the protruding conductive members may come into engaging contact with connection parts arranged at a flange of the vehicle to which the window glass 23 is mounted.
  • end used in the present descriptions may refer to a start point or an endpoint of an extending direction of a linear conductor.
  • the term may also be used to refer to portions of the linear conductor in the vicinity of such start point or endpoint.
  • connection parts for connecting the linear conductors may be arranged to have some curvature.
  • the antenna conductors, the signal-side feeding portion 16, and the ground-side feeding portion 17 may be formed by printing corresponding patterns using a paste including conductive metal such as a silver paste on the inner surface of the window glass 23 at the interior side of the vehicle, for example.
  • a paste including conductive metal such as a silver paste
  • the present invention is not limited to such an example.
  • a line or a foil made of conductive material such as copper may be arranged on the inner surface or the outer surface of the window glass.
  • the conductive material may be attached to the surface of the window glass using adhesive or the like, or the conductive material may alternatively be arranged within the window glass, for example.
  • the shapes of the signal-side feeding portion 16 and the ground-side feeding portion 17, and the distance between the signal-side feeding portion 16 and the ground-side feeding portion 17 may be determined according to the shapes of the mounting faces of the above conductive members and connectors and the distance between these mounting faces.
  • the signal-side feeding portion 16 and the ground-side feeding portion 17 may be arranged into square shapes, nearly square shapes, rectangular shapes, nearly rectangular shapes, and other quadrangular or polygonal shapes.
  • the signal-side feeding portion 16 and the ground-side feeding portion 17 may also be arranged into circular shapes, nearly circular shapes, oval shapes, or nearly oval shapes, for example.
  • the areas of the signal-side feeding portion 16 and the ground-side feeding portion 17 may be arranged to be the same or different.
  • a conductive layer including the antenna conductor may be arranged inside or on the surface of a synthetic resin film, and the synthetic resin film including the conductive layer may be arranged on the inner surface or outer surface of the window glass plate to fabricate a glass antenna.
  • a flexible circuit board on which the antenna conductor is formed may be arranged on the inner surface or outer surface of the window glass to fabricate the glass antenna.
  • a masking film may be arranged on the surface of the window glass 23, and the signal-side feeding portion 16, the ground-side feeding portion 17, and a part or all of the antenna conductor may be arranged on the masking film.
  • a film made of ceramic such as a black ceramic film may be used as the masking film, for example.
  • the antenna conductor arranged on the masking film may be invisible from outside the vehicle by the masking film to thereby improve the design of the window glass.
  • the signal-side feeding portion 16, the ground-side feeding portion 17, and a part of the antenna conductor may be arranged on the masking film (i.e., between the rim of the masking film and the rim 23a of the window glass 23) so that only fine lines corresponding to a part of the antenna conductor may be seen from outside the vehicle and the arrangements may be improved from a design perspective.
  • FIG. 5 is a plan view of a glass antenna 500 for a vehicle according to a fifth embodiment of the present invention.
  • FIG. 6 is a plan view of a glass antenna 600 for a vehicle according to a sixth embodiment of the present invention.
  • FIG. 7 is a plan view of a glass antenna for a vehicle according to a seventh embodiment of the present invention. It is noted that in the following descriptions, features of the embodiments illustrated in FIGS. 5 to 7 and advantages obtained by these features that are identical to those of the previously-described embodiments are omitted.
  • the first feeding portion corresponds to the ground-side feeding portion 17 and the second feeding portion corresponds to the signal-side feeding portion 16.
  • the glass antennas illustrated in FIGS. 1 to 4 have the first antenna element including the F-shaped element that is formed into an F-shape connected to the signal-side feeding portion 16
  • the glass antennas illustrated in FIGS. 5 to 7 has the first antenna element including an F-shaped element that is formed into an F-shape connected to the ground-side feeding portion 17.
  • the glass antennas illustrated in FIGS. 1 to 4 have the second antenna element including the L-shaped element that is formed into an L-shape connected to the ground-side feeding portion 17
  • the glass antennas illustrated in FIGS. 5 to 7 has the second antenna element including an L-shaped element that is formed into an L-shape connected to the signal-side feeding portion 16.
  • the first antenna element includes the F-shaped element that is formed into an F-shape by a first linear conductor having one end connected either directly or via a connection conductor to the ground-side feeding portion 17 and extending in a horizontal direction, a second linear conductor extending vertically from the other end of the first linear conductor as an origin, and a third linear conductor extending in the same direction as the second linear conductor from an intermediate point of the first linear conductor as an origin.
  • the second linear conductor and the third linear conductor may be arranged to extend in a direction substantially perpendicular to the extending direction of the first linear conductor to form the F-shaped element.
  • a linear conductor 11 as an exemplary embodiment of the first linear conductor extends linearly in the leftward direction from end "a1" that connects the linear conductor 11 to the ground-side feeding portion 17 as an origin
  • a linear conductor 12 as an exemplary embodiment of the second linear conductor extends linearly in the upward direction from end "c1" corresponding to the left side extending end of the linear conductor 11 as an origin
  • a linear conductor 13 as an exemplary embodiment of the third linear conductor extends linearly in the upward direction from an intermediate point "b1" of the leftward extending linear conductor 11 as an origin.
  • the linear conductor 12 extends upward to end “d1"
  • the linear conductor 13 extends upward to end "e1". It is noted that the intermediate point "b1" corresponds to a point between end "a1" and end "c1" of the linear conductor 11.
  • a linear conductor 19 is illustrated as a connection conductor for connecting the first linear conductor to the ground-side feeding portion 17.
  • the linear conductor 19 extends linearly in the downward direction from end “g1” that connects the linear conductor 19 to the ground-side feeding portion 17 as an origin.
  • the linear conductor 19 is configured to connect end “g1" to end “c1" corresponding to one end of the linear conductor 11. It is noted that the linear conductor 19 does not necessarily have to extend vertically downward and may alternatively be arranged to extend diagonally toward the lower-left side from end "g1" that is connected to the ground-side feeding portion 17, for example.
  • the second antenna element includes the L-shaped element that is formed into an L-shape by a fourth linear conductor and a fifth linear conductor.
  • the fourth linear conductor has one end connected either directly or via a connection conductor to the signal-side feeding portion 16 and extends in a horizontal direction on a side of the first linear conductor on which the second linear conductor extends.
  • the fifth linear conductor extends vertically from the other end of the fourth linear conductor as an origin.
  • the fifth linear conductor may be arranged to extend in a direction substantially perpendicular to the extending direction of the fourth linear conductor to form the L-shaped element.
  • a linear conductor 14 as an exemplary embodiment of the fourth linear conductor extends linearly in the leftward direction from end "f1" that connects the linear conductor 14 to the signal-side feeding portion 16 as an origin.
  • the linear conductor 14 extends at a region on the upper side of the linear conductor 11 (linear conductor 12 extending direction side).
  • a linear conductor 15 as an exemplary embodiment of the fifth linear conductor extends downward between the linear conductor 12 and the linear conductor 13 from end "h1" corresponding to the left side extending end of the linear conductor 14 as an origin.
  • the linear conductor 15 is arranged to extend downward to end "i1".
  • the linear conductor 15 that is connected to the signal-side feeding portion 16 via the linear conductor 14 extends vertically at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductor 12 that is connected to the ground-side feeding portion 17 via the linear conductors 11 and 19.
  • the linear conductor 14 as an exemplary embodiment of the fourth linear conductor extends linearly in the leftward direction from end "f1" that connects the linear conductor 14 to the signal-side feeding portion 16 as an origin.
  • the linear conductor 14 extends at a region on the upper side of the linear conductor 11 (linear conductor 12 extending direction side).
  • the linear conductor 15 as an exemplary embodiment of the fifth linear conductor extends downward from end "h1" corresponding to the left side extending end of the linear conductor 14 as an origin.
  • the linear conductor 15 extends at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductors 12 and 13.
  • the linear conductors 12 and 13 are arranged to extend vertically at a region on the opposite side of the linear conductor 15 from the side on which the signal-side feeding portion 16 and the ground-side feeding portion 17 are arranged.
  • the linear conductor 14 as an exemplary embodiment of the fourth linear conductor extends linearly in the leftward direction from end "f1" that connects the linear conductor 14 to the signal-side feeding portion 16 as an origin.
  • the linear conductor 14 extends at a region on the upper side of the linear conductor 11 (linear conductor 12 extending direction side).
  • the linear conductor 15 as an exemplary embodiment of the fifth linear conductor extends downward from end "h1" corresponding to the left side extending end of the linear conductor 14 as an origin.
  • the linear conductor 15 extends at a region on the opposite side of the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductor 12 and the linear conductor 13.
  • the linear conductor 15 is arranged to extend downward to end "i1".
  • the linear conductor 15 that is connected to the signal-side feeding portion 16 via the linear conductor 14 extends vertically at a region on the opposite side of the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductors 12 and 13 that are connected to the ground-side feeding portion 17 via the linear conductors 11 and 19.
  • the linear conductors 12 and 13 extend vertically at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to the linear conductor 15.
  • the first antenna element of the glass antennas illustrated in FIGS. 5 to 7 may include a sixth linear conductor that extends horizontally and is connected to end "h1" corresponding to the other end of the fourth linear conductor.
  • a linear conductor 18 as an exemplary embodiment of the sixth linear conductor extends linearly in the leftward direction from end "h1" as an origin.
  • the linear conductor 18 is arranged to extend leftward to end "j1".
  • end “a1" of the linear conductor 11 is arranged to be connected to the ground-side feeding portion 17 via the linear conductor 19 in the embodiments illustrated in FIGS. 5 to 7
  • end “f1" of the linear conductor 14 may be arranged to be connected to the signal-side feeding portion 16 via a connection conductor.
  • the antenna conductors illustrated in FIGS. 5 to 7 has the first antenna element and the second antennal element extending in the leftward direction
  • the first antenna element and the second antenna element may alternatively be arranged to extend in the rightward direction. That is, arrangements that are horizontally line symmetric to the arrangements illustrated in FIGS. 5 to 7 may be used, for example.
  • the positions of the signal-side feeding portion, the first antenna element, the ground-side feeding portion, and the second antenna element may be reversed vertically. That is, arrangements that are vertically line-symmetric or point-symmetric to the arrangements illustrated in FIGS. 5 to 7 may be used, for example.
  • the embodiments illustrated in FIGS. 5 to 7 by electrically connecting the signal-side feeding portion 16 to a signal path of an external signal processing device (e.g., vehicle-mounted amplifier) via a predetermined first conductive member, and electrically connecting the ground-side feeding portion 17 to an external ground path (e.g., ground of the signal processing device) via a predetermined second conductive member, reception characteristics compatible with a dual-band such as the DAB may be obtained.
  • an external signal processing device e.g., vehicle-mounted amplifier
  • an external ground path e.g., ground of the signal processing device
  • the window glass for automobile having the glass antenna formed thereon was mounted to a window frame of an automobile placed on a turntable to be tilted approximately 75 degrees with respect to a horizontal plane, and the antenna gain of the automobile glass antenna was measured in this state.
  • Connectors were attached to the signal-side feeding portion and the ground-side feeding portion to establish connection with a network analyzer via feeder cables.
  • the turntable was arranged to rotate so that radio waves may be horizontally irradiated on the window glass from all directions.
  • the antenna gain was measured by setting the vehicle center of the automobile having the window glass with the glass antenna to the center of the turntable and rotating the automobile 360 degrees. Specifically, at every rotational angle of 5 degrees, the antenna gain was measured at intervals of 3 MHz within the Band III frequency band and at intervals of 1.7 MHz within the L-Band frequency band.
  • the antenna gain was normalized based on the half-wave dipole antenna so that the antenna gain of the half-wave dipole antenna may be equal to 0 dB.
  • FIGS. 8A and 8B represent measurement data of the antenna gain of a high frequency glass antenna for an automobile that is fabricated by mounting the glass antenna 200 illustrated in FIG. 2 to a side window of an automobile, the antenna gain being measured while varying the conductor length L3 of the linear conductor 3.
  • the vertical axis of FIG. 8A represents the average value of the antenna gains for Band III (174 to 240 MHz) measured at intervals of 3 MHz and at rotational angle intervals of 5 degrees.
  • the vertical axis of FIG. 8B represents the average value of the antenna gains for L-Band (1452 to 1492 MHz) measured at intervals of 1.7 MHz and at rotational angle intervals of 5 degrees.
  • the antenna gain for L-Band can be improved by increasing the conductor length L3 of the linear conductor 3.
  • the antenna gain for L-Band may be improved while the antenna gain for Band III may be prevented from substantially changing.
  • FIGS. 9A and 9B represent measurement data of the antenna gain of a high frequency glass antenna for an automobile that is fabricated by mounting the glass antenna 200 illustrated in FIG. 2 to a side window of an automobile, the antenna gain being measured while varying the conductor length L5 of the linear conductor 5.
  • the vertical axis of FIG. 9A represents the average value of the antenna gains for Band III (174 to 240 MHz) measured at intervals of 3 MHz and at rotational angle intervals of 5 degrees.
  • the vertical axis of FIG. 9B represents the average value of the antenna gains for L-Band (1452 to 1492 MHz) measured at intervals of 1.7 MHz and at rotational angle intervals of 5 degrees.
  • the antenna gain for L-Band can be improved by increasing the conductor length L5 of the linear conductor 5.
  • the antenna gain for Band III may be improved while the antenna gain for the L-Band may be prevented from substantially changing.
  • FIGS. 10A to 10C represent measurement data of the antenna gain of a high frequency glass antenna for an automobile that is fabricated by mounting the glass antenna 200 illustrated in FIG. 2 to a side window of an automobile, the antenna gain being measured while varying the conductor length L2 of the linear conductor 2.
  • the vertical axis of FIG. 10A represents the average value of the antenna gains for Band III (174 to 240 MHz) measured at intervals of 3 MHz and at rotational angle intervals of 5 degrees.
  • the vertical axis of FIG. 10B represents the average value of the antenna gains for L-Band (1452 to 1492 MHz) measured at intervals of 1.7 MHz and at rotational angle intervals of 5 degrees.
  • the vertical axis of FIG. 10C represents the average value of the antenna gains measured at rotation angle intervals of 5 degrees for each frequency.
  • the antenna gain for Band III may be improved by arranging the conductor length L2 of the linear conductor 2 to be greater than or equal to 30 mm and less than or equal to 100 mm.
  • the antenna gain for a high frequency band from 210 MHz and higher of the Band III frequency band may be improved (e.g., comparing the cases where the conductor length L2 is equal to 10 mm and 100 mm, the antenna gain may be improved by approximately 4 dB).
  • the antenna gain for L-Band may be improved when the conductor length L2 of the linear conductor 2 is arranged to be greater than or equal to 40 mm and less than or equal to 100 mm.
  • FIGS. 11A and 11B represent measurement data of the antenna gain of a high frequency glass antenna for an automobile that is fabricated by mounting the glass antenna 200 illustrated in FIG. 2 to a side window of an automobile, the antenna gain being measured while varying the conductor length L6 of the linear conductor 6.
  • the vertical axis of FIG. 11A represents the average value of the antenna gains for Band III (174 to 240 MHz) measured at intervals of 3 MHz and at rotational angle intervals of 5 degrees.
  • the vertical axis of FIG. 11B represents the average value of the antenna gains for L-Band (1452 to 1492 MHz) measured at intervals of 1.7 MHz and at rotational angle intervals of 5 degrees.
  • the antenna gain for Band III may be improved when the conductor length L6 of the linear conductor 6 is arranged to be greater than or equal to 20 mm and less than or equal to 100 mm.
  • the antenna gains for L-Band may be improved when the conductor length L6 of the linear conductor 6 is arranged to be greater than or equal to 20 mm and less than or equal to 60 mm.
  • FIG. 12 represents measurement data of the antenna gains for Band III of high frequency glass antennas for automobiles fabricated by mounting the glass antennas 200, 300, and 400 respectively illustrated in FIGS. 2 , 3, and 4 to side windows of the automobiles.
  • the vertical axis of FIG. 12 represents the average value of antenna gains measured at rotational angle intervals of 5 degrees for each frequency.
  • the average values of the antenna gains at the Band III frequency band are -1.0 dBd for the glass antenna 200, -1.8 dBd for the glass antenna 300, and -0.9 dBd for the glass antenna 400.
  • adequate antenna gains may be obtained for the Band III frequency band in the glass antennas 200, 300, and 400 having an F-shaped element and an L-shaped element facing each other.
  • the antenna gain for Band III may be further improved in an arrangement such as those of glass antennas 200 and 400 in which at least one of the linear conductors 2 and 3 connected to the signal-side feeding portion 16 extends vertically at a region closer toward the signal-side feeding portion1 16 and the ground-side feeding portion 17 with respect to the linear conductor 5 that is connected to the ground-side feeding portion 17.
  • FIG. 13 represents measurement data of the antenna gains for Band III of high frequency glass antennas for automobiles fabricated by mounting the glass antennas 200, 500, 600, and 700 respectively illustrated in FIGS. 2 , 5 , 6 , and 7 to side windows of the automobiles.
  • the vertical axis of FIG. 13 represents the average value of antenna gains measured at rotational angle intervals of 5 degrees for each frequency.
  • the average values of the antenna gains of Band III frequency band are -1.0 dBd for the glass antenna 200, -1.1 dBd for the glass antenna 500, -1.2 dBd for the glass antenna 600, and -1.4 dBd for the glass antenna 700.
  • adequate antenna gains may be obtained for the Band III frequency band in the glass antennas 200, 500, 600, and 700 having an F-shaped element and an L-shaped element facing each other.
  • the antenna gain for Band III may be further improved in an arrangement such as those of the glass antennas 500 and 600 in which the linear conductor 15 that is connected to the signal-side feeding portion 16 extends vertically at a region closer toward the signal-side feeding portion 16 and the ground-side feeding portion 17 with respect to at least one of the linear conductors 12 and 13 that are connected to the ground-side feeding portion 17.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)
EP12741960.4A 2011-02-04 2012-01-27 Glasintegrierte antenne und für ein fahrzeug verwendbare verglasung damit Active EP2672565B1 (de)

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JP2011023359 2011-02-04
PCT/JP2012/051866 WO2012105456A1 (ja) 2011-02-04 2012-01-27 ガラスアンテナ及びそれを備える車両用窓ガラス

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
US9487441B2 (en) 2011-10-28 2016-11-08 Corning Incorporated Glass articles with infrared reflectivity and methods for making the same
US10116035B2 (en) 2015-04-30 2018-10-30 Corning Incorporated Electrically conductive articles with discrete metallic silver layers and methods for making same

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JPH1174714A (ja) * 1997-06-16 1999-03-16 Asahi Glass Co Ltd 自動車用高周波ガラスアンテナ
JP2000151249A (ja) * 1998-11-16 2000-05-30 Central Glass Co Ltd 車両用ガラスアンテナ
EP2190057A1 (de) * 2008-11-20 2010-05-26 Asahi Glass Co., Ltd. Glasantenne und Fensterglas für Fahrzeuge

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US6160518A (en) * 1999-04-02 2000-12-12 Visteon Global Technologies, Inc. Dual-loop multiband reception antenna for terrestrial digital audio broadcasts
TW574771B (en) 2002-07-16 2004-02-01 Yen Tjing Ling Ind Dev Foundat Multi-band mono-input complex winding antenna
EP1732160A1 (de) 2005-06-10 2006-12-13 Matsushita Electric Industrial Co., Ltd. Doppelbandantenne für den digitalen Tonrundfunk
JP2007300398A (ja) * 2006-04-28 2007-11-15 Ntt Docomo Inc マルチバンドアンテナおよびマルチバンドマルチアンテナ
JP5316230B2 (ja) * 2009-04-20 2013-10-16 セントラル硝子株式会社 ガラスアンテナ

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JPH1174714A (ja) * 1997-06-16 1999-03-16 Asahi Glass Co Ltd 自動車用高周波ガラスアンテナ
JP2000151249A (ja) * 1998-11-16 2000-05-30 Central Glass Co Ltd 車両用ガラスアンテナ
EP2190057A1 (de) * 2008-11-20 2010-05-26 Asahi Glass Co., Ltd. Glasantenne und Fensterglas für Fahrzeuge

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9487441B2 (en) 2011-10-28 2016-11-08 Corning Incorporated Glass articles with infrared reflectivity and methods for making the same
US9586861B2 (en) 2011-10-28 2017-03-07 Corning Incorporated Glass articles with discrete metallic silver layers and methods for making the same
US9975805B2 (en) 2011-10-28 2018-05-22 Corning Incorporated Glass articles with infrared reflectivity and methods for making the same
US11535555B2 (en) 2011-10-28 2022-12-27 Corning Incorporated Glass articles with infrared reflectivity and methods for making the same
US10116035B2 (en) 2015-04-30 2018-10-30 Corning Incorporated Electrically conductive articles with discrete metallic silver layers and methods for making same

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WO2012105456A1 (ja) 2012-08-09
EP2672565B1 (de) 2018-11-14
EP2672565A4 (de) 2014-12-24
JPWO2012105456A1 (ja) 2014-07-03
JP5867416B2 (ja) 2016-02-24

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