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EP2355237B1 - Glasantenne und Fahrzeugfensterscheibe, die diese Antenne beinhaltet - Google Patents

Glasantenne und Fahrzeugfensterscheibe, die diese Antenne beinhaltet Download PDF

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Publication number
EP2355237B1
EP2355237B1 EP11000784.6A EP11000784A EP2355237B1 EP 2355237 B1 EP2355237 B1 EP 2355237B1 EP 11000784 A EP11000784 A EP 11000784A EP 2355237 B1 EP2355237 B1 EP 2355237B1
Authority
EP
European Patent Office
Prior art keywords
antenna
glass
conductor
longer
extends
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
EP11000784.6A
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English (en)
French (fr)
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EP2355237A1 (de
Inventor
Kenichiro Shimo
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
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Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of EP2355237A1 publication Critical patent/EP2355237A1/de
Application granted granted Critical
Publication of EP2355237B1 publication Critical patent/EP2355237B1/de
Not-in-force legal-status Critical Current
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles
    • 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
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect
    • H01Q1/46—Electric supply lines or communication lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/30—Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
    • 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

Definitions

  • the present invention relates to a glass antenna which is provided on a glass plate.
  • the present invention also relates to a vehicular windrow glass on which a glass antenna is provided.
  • DAB digital audio broadcasting
  • DAB includes two different frequency bands such as a band III of 174 to 240 MHz and an L band of 1452 to 1492 MHz.
  • WO 00/70708 A1 discloses a vehicle glass antenna which can receive AM and FM waves with high sensitivity without a choke coil.
  • the glass antenna includes an AM antenna provided so as not to be capacitively coupled with a defogging heater unit also installed on a vehicle window glass.
  • An FM antenna in the form of a single horizontal antenna conductor element is disposed on the window glass between the defogging heater unit and the AM antenna.
  • the glass antenna device further includes an AM amplifier for amplifying a signal received via the AM antenna and an FM amplifier for amplifying a signal received via the FM antenna.
  • JP2005210151 discloses a wide band glass antenna of the dipole type.
  • a glass plate provided with a glass antenna to be provided on or in the glass plate, said glass antenna being a dipole type and comprising: when looking at a surface of the glass plate while facing the same,
  • an antenna conductor having a first antenna conductor, a second antenna conductor and a third antenna conductor
  • the first antenna conductor includes a first L-shaped element which is formed into an L-shape geometry by a first element which extends from the upper feeding portion as a starting point and a second element which extends from the first element as a starting point and in which one of the first element and the second element extends upwards while the other extends rightwards
  • the second antenna conductor includes a second L-shaped element which is formed into an L-shaped geometry by a third element which extends rightwards from the lower feeding portion as a starting point and a fourth element which extends downwards from the third element as a starting point
  • the third antenna conductor includes a fifth element which extends upwards from the upper feeding portion as a starting point
  • the glass antenna is configured to receive a predetermined first broadcast frequency band and a predetermined second broadcast band which is higher than the first broadcast band, and wherein said glass plate provided with a glass antenna is characterized
  • a vehicular window glass comprises the above-mentioned glass plate provided with a glass antenna.
  • Plan views of vehicular glass antennas are views of those which result when a viewer looks at a glass plate while facing the same.
  • the plan views each show a window glass as being seen from an inside of a passenger compartment of a vehicle in such a state that the window glass is fitted on the vehicle.
  • the plan views may be referred to as those showing the window glass as being seen from an outside of the vehicle.
  • a left-right direction on the drawings corresponds to a front-rear or longitudinal direction of the vehicle.
  • the invention may be applied not only to the side window but also to a rear window which is mounted at the rear of the vehicle, a windshield which is mounted at the front of the vehicle, and glass plates other than vehicular glass plates (for example, window glass for buildings and window glass for marine vessels and so on).
  • Fig. 1 is a plan view of a vehicular glass antenna 100 which is a first embodiment of the invention.
  • Fig. 2 is a plan view of a vehicular glass antenna 200 which is a second embodiment of the invention.
  • the glass antennas 100, 200 are antennas which are provided on or in a window glass 23 which is a side window of a vehicle.
  • Figs. 1 , 2 show views as seen from an inside of the vehicle, and a left-hand side of each drawing corresponds to a rear side of the vehicle.
  • a vertical direction in each drawing corresponds to a vertical direction of the vehicle, and a lower side of each drawing corresponds to road surface side.
  • the glass antennas 100, 200 are a dipole-type antenna provided on the window glass 23 in a planar fashion and include antenna conductors and an upper feeding portion 16 and a lower feeding portion 17 which are aligned in a vertical direction along a side edge of the window glass 23 with a space provided therebetween.
  • the upper feeding portion 16 and the lower feeding portion 17 constitute a pair of feeding points for the antenna conductors.
  • the glass antennas 100, 200 have at least a first antenna conductor, a second antenna conductor and a third antenna conductor as an antenna conductor pattern.
  • the first antenna conductor includes a first L-shaped element which is formed into an L-shaped geometry by a first element which extends from the upper feeding portion 16 as a starting point and a second element which extends from the first element as a starting point.
  • the second element extends in the direction which is at right angles or at substantially right angles to the direction in which the first element extends.
  • one of the first element and the second element extends upwards and the other extends rightwards.
  • Fig. 1 an element 1a which extends upwards in a straight line from the upper feeding portion 16 as a starting point is depicted as the first element, and an element 2a which extends rightwards in a straight line from a terminating end portion a of the upper extension of the element 1a as a starting point is depicted as the second element.
  • the element 2a extends to a terminating end b of the extension of the first antenna conductor.
  • an element 1b which extends rightwards in a straight line from the upper feeding portion 16 as a starting point is depicted as the first element
  • an element 2b which extends upwards in a straight line from a terminating end g of the rightward extension of the element 1b as a starting point is depicted as the second element.
  • the element 2b extends to a terminating end h of the extension of the first antenna conductor.
  • the second antenna conductor includes a second L-shaped element which is formed into an L-shaped geometry by a third element which extends rightwards from the lower feeding portion 17 as a starting point and a fourth element which extends downwards from the third element as a starting point.
  • the fourth element extends in the direction which is at right angles or at substantially right angles to the direction in which the third element extends.
  • an element 3 which extends rightwards in a straight line from the lower feeding portion 17 as a starting point is depicted as the third element
  • an element 4 which extends downwards in a straight line from a terminating end portion c of the rightward extension of the third element 3 as a staring point is depicted as the fourth element.
  • the element 4 extends to a terminating end d of the extension of the second antenna conductor.
  • the third antenna conductor includes a fifth element which extends upwards from the upper feeding portion 16 as a starting point.
  • a fifth element which extends upwards in a straight line from the upper feeding portion 16 as a starting point is depicted as a fifth element.
  • the fifth element 5 extends to a terminating end e of the third antenna conductor.
  • the element 5 extends along a left-hand side edge of the window glass 23 on a left-hand side area of the element 1a with a space provided therebetween.
  • the glass antennas 100, 200 may have, as an antenna conductor pattern, a fourth antenna conductor which includes a sixth element which extends downwards from the lower feeding portion 17 as a starting point.
  • a fourth antenna conductor which includes a sixth element which extends downwards from the lower feeding portion 17 as a starting point.
  • an element 6 which extends downwards in a straight line from the lower feeding portion 17 as a starting point is depicted as the sixth element.
  • the sixth element extends to a terminating end f of the fourth antenna conductor.
  • the upper feeding portion 16 is electrically connected to a signal line of an external signal processing system (for example, an on-board amplifier) via a predetermined first conductive member, while the lower feeding portion 17 is electrically connected to an external grounding line (for example, a grounding of the signal processing system) via a predetermined second conductive member, whereby reception characteristics can be obtained which can deal with a dual band such as the DAB.
  • an external signal processing system for example, an on-board amplifier
  • an external grounding line for example, a grounding of the signal processing system
  • a radio wave such as a vertically-polarized wave of a dual band such as the DAB can be received with a better sensitivity.
  • a mounting angle of the window glass 23 on the vehicle is preferably in the range from 30 to 90° and more preferably in the range of 60 to 90° with respect to the earth's surface.
  • first and second conductive members for example, feeding wires such as an AV wire and a coaxial cable are used.
  • a coaxial cable When a coaxial cable is used, an internal conductor of the coaxial cable may be electrically connected the upper feeding portion 16, while an external conductor of the coaxial cable may be electrically connected to the lower feeding portion 17.
  • a configuration may be adopted in which a connector for electrically connecting a conductive member connected to the signal processing system to each of the upper feeding portion 16 and the lower feeding portion 17 is mounted in each of the upper feeding portion 16 and the lower feeding portion 17. The attachment of the internal conductor and external conductor of the coaxial cable to the upper feeding portion 16 and the lower feeding portion 17, respectively, is facilitated by the connectors.
  • a configuration may also be adopted in which a projecting conductive member is placed on each of the upper feeding portion 16 and the lower feeding portion 17 so that the projecting conductive members are brought into contact with or are fitted in a flange of a vehicle body on which the window glass 23 is mounted.
  • the reception characteristics of the high-frequency radio wave of the dual band can be kept least affected by the tuning.
  • the reception characteristics of the low-frequency radio wave of the dual band can be kept least affected by the tuning. Namely, the tunings are facilitated.
  • the second antenna conductor may include a seventh element which extends leftwards from the fourth element as a starting point.
  • an element 7 which extends leftwards in a straight line from a terminating end portion i of the downward extension of the element 4 as a starting point is depicted as the seventh element.
  • the element 7 extends to a terminating end j of the second antenna conductor.
  • the "terminating end portion” may be a terminating point of the elements or lie in proximity to the terminating point or in a conductor portion just before the terminating point.
  • the connecting portion where the elements are connected may have a curvature.
  • the antenna conductors, the upper feeding portion 16 and the lower feeding portion 17 are formed by printing and firing a paste containing a conductive metal such as a silver paste on a vehicle-interior side surface of the window glass, for example.
  • a conductive metal such as a silver paste
  • the forming method is not limited thereto.
  • a linear or foil-like material made of a conductive substance such as copper may be formed on an internal side surface or an external side surface of a window glass or may be affixed to the window glass with an adhesive.
  • such a linear or foil-like material may be provided in an interior of the window glass itself.
  • Shapes of the upper feeding portion 16 and the lower feeding portion 17 and a space between the upper feeding portion 16 and the lower feeding portion 17 may be determined in accordance with the shapes of the mounting surfaces of the conductive members and the space between the mounting surfaces, respectively.
  • a quadrangular shape such as a square, substantially square, rectangular or substantially rectangular shape or a polygonal shape is preferred.
  • a circular shape such as a circle, substantially circle, oval or substantially oval shape may be adopted.
  • An area of the upper feeding portion 16 and an area of the lower feeding portion 17 may be the same or different from each other.
  • a glass antenna may be adopted which is produced by providing a conductor layer including antenna conductors in an interior or on a surface of a synthetic resin film and applying the synthetic resin film with the conductor layer on an internal side surface or an external side surface of a window glass plate. Further, a glass antenna may be adopted which is produced by forming a flexible circuit board on which antenna conductors are formed on an internal side surface or an external side surface of the window glass.
  • a concealing film is formed on a surface of the window glass 23, and the feeding portions and part or the whole of the antenna conductors may be provided on the concealing film. Ceramics such as a black ceramic film are raised as the concealing film.
  • ⁇ 01 a wavelength in the air at a central frequency of the first broadcast frequency band
  • k 1 0.54
  • ⁇ g1 ⁇ 01 ⁇ k 1
  • a conductor length L1a of the element 1a which corresponds to the first element which is a vertical component of the first antenna conductor is preferably (1/24) ⁇ g1 or longer, or more preferably (1/12) ⁇ g1 or longer, within a range where the element 1a stays within the window glass 23, a preferred result can be obtained in increasing the antenna gain in the first broadcast frequency band.
  • the band III (174 to 240 MHz) is set as the first broadcast frequency band, a center frequency thereof is 207 MHz. Consequently, when the antenna gain of the band III is attempted to be increased, in case the speed of a radio wave is referred to as 3.0 x 10 8 m/s, it is good to adjust the conductor length L1a of the element 1a is adjusted preferably to be 35 mm or longer, or more preferably to be 66 mm or longer.
  • a conductor length L2b of the element 2b which corresponds to the second element which is a vertical component of the first antenna conductor is preferably (1/12) ⁇ g1 or longer, more preferably (1/8) ⁇ g1 or longer, or further preferably (1/6) ⁇ g1 or longer, within a range where the element 2b stays within the window glass 23, a preferred result can be obtained in increasing the antenna gain in the first broadcast frequency band.
  • the conductor length L2b of the element 2b is adjusted preferably to be 66 mm or longer, more preferably to be 97 mm or longer, or further preferably to be 130 mm or longer.
  • an overall length of the first antenna conductor that is, a sum of the conductor lengths of the element 1a and the element 2a or the conductor lengths of the element 1b and the element 2b is preferably 0.15 ⁇ g1 or longer and 0.3 ⁇ g1 or shorter, or more preferably 0.2 ⁇ g1 or longer and 0.27 ⁇ g1 or shorter, a preferred result can be obtained in increasing the antenna gain in the first broadcast frequency band. Consequently, when the antenna gain of the band III is attempted to be increased, it is good to adjust the overall length of the first antenna conductor is adjusted preferably to be 120 mm or longer and 240 mm or shorter, or more preferably to be 160 mm or longer and 210 mm or shorter.
  • a conductor length L4 of the element 4 which corresponds to the fourth element which is a vertical component of the second antenna conductor is preferably (1/5) ⁇ g1 or longer, or more preferably (1/4) ⁇ g1 or longer, within a range where the element 4 stays within the window glass 23, a preferred result can be obtained in increasing the antenna gain in the first broadcast frequency band. Consequently, when the antenna gain of the band III is attempted to be increased, it is good to adjust the conductor length L4 of the element 4 is adjusted preferably to be 150 mm or longer, or more preferably to be 200 mm or longer.
  • an overall length of the second antenna conductor that is, a sum of the conductor lengths of the element 3 and the element 4 is preferably 0.3 ⁇ g1 or longer and 0.64 ⁇ g1 or shorter, or more preferably 0.35 ⁇ g1 or longer and or 0.52 ⁇ g1 or shorter, a preferred result can be obtained in increasing the antenna gain in the first broadcast frequency band within the range where the element 3 and the element 4 stay within the window glass 23. Consequently, when the antenna gain of the band III is attempted to be increased, it is good to adjust the overall length of the second antenna conductor is adjusted preferably to be 240 mm or longer and 500 mm or shorter, or more preferably to be 280 mm or longer and 400 mm or shorter.
  • a length (L5 + E) of a conductor line which connects shortest between the terminating end e of the extension of the element 5 and an end of the upper feeding portion 16 is preferably 0.17 ⁇ g2 or longer and 0.27 ⁇ g2 or shorter, or more preferably 0.19 ⁇ g2 or longer and 0.26 ⁇ g2 or shorter, a preferred result can be obtained in increasing the antenna gain in the second broadcast frequency band.
  • the end of the upper feeding portion 16 corresponds to a lower end of the upper feeding portion 16 which is the end facing the lower feeding portion 17.
  • "E" of (L5 + E) corresponds to a length of a side of the square upper feeding portion 16.
  • the L band (1452 to 1492 MHz) is set as the second broadcast frequency band
  • a center frequency thereof is 1472 MHz. Consequently, when the antenna gain of the L band is attempted to be increased, in case the speed of a radio wave is referred to as 3.0 x 10 8 m/s, it is good to adjust the length (L5 + E) of the conductor line is adjusted preferably to be 26 mm or longer and 40 mm or shorter, or more preferably to be 30 mm or longer and 38 mm or shorter.
  • a length (L6 + E) of a conductor line which connects shortest between the terminating end f of the extension of the element 6 and an end of the lower feeding portion 17 is preferably 0.07 ⁇ g2 or longer and 0.2 ⁇ g2 or shorter, or more preferably 0.13 ⁇ g2 or longer and 0.19 ⁇ g2 or shorter, a preferred result can be obtained in increasing the antenna gain in the second broadcast frequency band.
  • the end of the lower feeding portion 17 corresponds to an upper end of the lower feeding portion 17 which is the end facing the upper feeding portion 16.
  • "E" of (L6 + E) corresponds to a length of a side of the square lower feeding portion 17.
  • the length (L6 + E) of the conductor line is adjusted preferably to be 12 mm or longer and 30 mm or shorter, or more preferably to be 20 mm or longer and 28 mm or shorter.
  • Antenna gains are actually measured in such a state that the automotive window glass plates formed with the glass antenna are assembled into a window frame of an automobile on a turntable while being inclined at about 75° relative to the horizontal plane.
  • Connectors are attached to the feeding portions and are connected to a network analyzer via feeder wires.
  • the turntable rotates so that radio waves are applied onto the window glass in every direction from the horizontal direction.
  • the measurement of antenna gains is performed by setting a vehicle center of the automobile, assembled with the glass plate on which the glass antenna is formed, at the center of the turntable and rotating the automobile through 360°.
  • Antenna gains are measured every 3 MHz within the frequency range of the band III and every 1.7 MHz within the frequency range of the L band at every time the turntable rotates through 3°.
  • Antenna gains are standardized based on a half-wavelength dipole antenna so that the gain of the half-wavelength dipole antenna is 0dB.
  • Fig. 4 is a plan view of a vehicular glass antenna REF which is compared with the vehicular glass antenna 100 (refer to Fig. 1 ) which is the embodiment of the invention.
  • the vehicular glass antenna REF is also a dipole-type glass antenna.
  • a form of a second antenna conductor of the glass antenna REF differs from that of the glass antenna 100.
  • the second antenna conductor of the glass antenna REF includes an L-shaped element which is formed into an L-shaped geometry by an element 13 which extends downwards from a lower feeding portion 17 as a starting point and an element 14 which extends rightwards from the element 13 as a starting point.
  • Fig. 5 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting the glass antenna 100 formed as is shown in Fig. 1 on a side window of an actual vehicle when a conductor length L4 of the element 4 is changed while a sum of a conductor length L3 of the element 3 and the conductor length L4 keeps constant at 300 mm.
  • Fig. 6 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting the glass antenna REF formed as is shown in Fig. 4 on a side window of an actual vehicle when a conductor length L13 is changed while a sum of the conductor length L13 of the element 13 and a conductor length L14 of the element 14 keeps constant at 300 mm.
  • Vertical axes of Figs. 5, 6 represent mean values of antenna gains measured every 3 MHz in the band III (170 to 240 MHz).
  • L1a 37 L2a: 160 L5: 24 L6: 14, where "L*" (* represents a reference numeral) denotes a conductor length of the element *.
  • a conductor width of each element is 0.8 mm.
  • the upper feeding portion 16 and the lower feeding portion 17 are both square with 10 mm sides.
  • a space between the upper feeding portion 16 and the lower feeding portion 17 is 20 mm.
  • the antenna gain in the band III is increased by means of the glass antenna 100 having the element 3 which extends rightwards from the lower feeding portion 17 as the starting point, compared with the glass antenna REF having the element which extends downwards from the lower feeding portion 17 as the starting point.
  • the antenna gain in the band III can be increased. For example, in the event that the conductor length L4 of the element 4 is 150 mm or longer, the antenna gain in the band III can be increased.
  • Fig. 7 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting the glass antenna 100 formed as is shown in Fig. 1 on a side window of an actual vehicle when a conductor length L1a of the element 1a is changed while a sum of the conductor length L1a and a conductor length L2a of the element 2 keeps constant at 197 mm.
  • Fig. 8 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting the glass antenna 200 formed as is shown in Fig.
  • the antenna gain in the band III can be increased as the conductor length of the element 1a or 2b which extends in the vertical direction of the first antenna conductor is lengthened.
  • the antenna gain in the band III can be increased.
  • the conductor length L2b of the element 2b which is the vertical component of the first antenna conductor is 66 mm or longer, or further 97 mm or longer.
  • Fig. 9 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting a glass antenna 300 formed as is shown in Fig. 3 on a side window of an actual vehicle when a conductor length L7 of an element 7 is changed while a sum of a conductor length L4 of an element 4 and the conductor length L7 keeps constant at 220 mm.
  • a vertical axis of Fig. 9 represents mean values of antenna gains measured every 3 MHz in the band III (170 to 240 MHz).
  • the antenna gain in the band III can be increased.
  • Fig. 10 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting only the element 5 and the feeding portions 16, 17 of the glass antenna 100 formed as is shown in Fig. 1 on a side window of an actual vehicle when a sum (L5 + E) of a conductor length L5 of the element 5 and a length E of the side of the upper feeding portion 16 is changed by changing the conductor length L5.
  • a vertical axis of Fig. 10 represents mean values of antenna gains measured every 1.7 MHz in the L band (1452 to 1492 MHz).
  • a conductor width of the element 5 when antenna gains in Fig. 10 are actually measured is 0.8 mm.
  • the upper feeding portion 16 and the lower feeding portion 17 are both square with 10 mm sides.
  • a space between the upper feeding portion 16 and the lower feeding portion 17 is 20 mm.
  • the antenna gain in the L band can be increased.
  • Fig. 11 is a graph showing actually measured data of antenna gains of an automotive high-frequency glass antenna fabricated by mounting only the elements 5, 6 and the feeding portions 16, 17 of the glass antenna 100 formed as is shown in Fig. 1 on a side window of an actual vehicle when a sum (L6 + E) of a conductor length L6 of the element 6 and a length E of the side of the lower feeding portion 17 is changed by changing the conductor length L6.
  • a vertical axis of Fig. 11 represents mean values of antenna gains measured every 1.7 MHz in the L band (1452 to 1492 MHz).
  • Conductor widths of the elements 5, 6 when antenna gains in Fig. 11 are actually measured are 0.8 mm.
  • the upper feeding portion 16 and the lower feeding portion 17 are both square with 10 mm sides.
  • a space between the upper feeding portion 16 and the lower feeding portion 17 is 20 mm.
  • the antenna gain in the L band can be increased.
  • a mean value of the antenna gains which are actually measured every 3 MHz in the whole band of the band III and a mean value of the antenna gains which are actually measured every 1.7 MHz in the whole band of the L band on the automotive high-frequency glass antenna fabricated by mounting the glass antenna 100 formed as is shown in Fig. 1 on the side window of the actual vehicle were calculated.
  • the mean value of the antenna gains in the whole band of the band III is -3.3dBd
  • the mean value of the antenna gains in the whole band of the L band is -6.6dBd.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)

Claims (12)

  1. Eine Glasplatte, die auf oder in der Glasplatte mit einer Glasantenne (100; 200; 300) versehen ist, wobei die genannte Glasantenne (100; 200; 300) des Dipoltyps ist und Folgendes umfasst:
    wenn man auf eine Oberfläche der Glasplatte blickt, während man ihr zugewandt ist,
    einen oberen Einspeisepunkt (16) und einen unteren Einspeisepunkt (17), die in vertikaler Richtung ausgerichtet sind; und
    einen Antennenleiter, der einen ersten Antennenleiter, einen zweiten Antennenleiter und einen dritten Antennenleiter aufweist,
    wobei der erste Antennenleiter ein erstes L-förmiges Element beinhaltet, das von einem ersten Element (1a; 1b) zu einer L-förmigen Geometrie geformt wird, das sich vom oberen Einspeisepunkt (16) als Startpunkt erstreckt, und von einem zweiten Element (2a; 2b), das sich von einem Abschlussende-Abschnitt (a; g) des ersten Elements (1a; 1b) als Startpunkt erstreckt, und wobei sich eines der Elemente aus Element eins (1a; 1b) und Element zwei (2a; 2b) nach oben erstreckt während das andere sich nach rechts erstreckt,
    wobei der zweite Antennenleiter ein zweites L-förmiges Element beinhaltet, das von einem dritten Element (3) zu einer L-förmigen Geometrie geformt wird, das sich vom unteren Einspeisepunkt (17) als Startpunkt nach rechts erstreckt, und von einem vierten Element (4), das sich von einem Abschlussende-Abschnitt (c) des dritten Elements (3) als Startpunkt nach unten erstreckt,
    wobei der dritte Antennenleiter ein fünftes Element (5) beinhaltet, das sich ausgehend vom oberen Einspeisepunkt (16) als Startpunkt nach oben erstreckt,
    wobei die Glasantenne (100; 200; 300) konfiguriert ist, um ein vorbestimmtes erstes Rundfunkfrequenzband und ein vorbestimmtes zweites Rundfunkfrequenzband zu empfangen, das höher als das erste Rundfunkfrequenzband liegt, und
    wobei:
    zwischen dem oberen Einspeisepunkt (16) und dem unteren Einspeisepunkt (17) ein Raum bereitgestellt wird;
    das zu empfangende erste Rundfunkfrequenzband in einem Bereich von 174 bis 240 MHz vorliegt, das zu empfangende zweite Rundfunkfrequenzband, das höher als das erste Rundfunkfrequenzband liegt, in einem Bereich von 1452 bis 1492 MHz vorliegt; und wobei
    eine Länge ausgehend vom Abschlussende (e) des fünften Elements (5) und einem Ende des oberen Einspeisepunktes (16) 0,17λg2 oder mehr und 0,27λg2 oder weniger beträgt, wobei eine Wellenlänge in der Luft bei einer Mittenfrequenz des zweiten Rundfunkfrequenzbandes als λ02 bezeichnet wird, ein Verkürzungs-Koeffizient der Wellenlänge für Glas als k 2 bezeichnet wird und wobei λg2 = λ02·k 2.
  2. Eine Glasplatte, die mit einer Glasantenne (100; 300) versehen ist nach Anspruch 1, wobei
    sich das erste Element (1), ausgehend vom oberen Einspeisepunkt (16) als ein Startpunkt, nach oben hin erstreckt.
  3. Eine Glasplatte, die mit einer Glasantenne (100; 300) versehen ist nach Anspruch 2, wobei
    eine Wellenlänge in der Luft bei einer Mittenfrequenz des ersten Rundfunkfrequenzbandes als λ01 bezeichnet wird, und ein Verkürzungs-Koeffizient der Wellenlänge für Glas als k1 bezeichnet wird, k1 = 0,54 beträgt und wobei λg1 = λ01 · k1, und wobei
    eine Leiterlänge des ersten Elements (1) (1/24)λg1 beträgt oder länger ist.
  4. Eine Glasplatte, die mit einer Glasantenne (100; 300) versehen ist nach Anspruch 2, wobei eine Leiterlänge des ersten Elements (1) 35 mm beträgt oder länger ist.
  5. Eine Glasplatte, die mit einer Glasantenne (100; 200; 300) versehen ist nach irgendeinem der Ansprüche von 1 bis 4, wobei
    eine Wellenlänge in der Luft bei einer Mittenfrequenz des ersten Rundfunkfrequenzbandes als λ01 bezeichnet wird, und ein Verkürzungs-Koeffizient der Wellenlänge für Glas als k1 bezeichnet wird, k1 = 0,54 beträgt und wobei λg1 = λ01 · k1 , und wobei
    eine Leiterlänge des vierten Elements (4) (1/5)λg1 beträgt oder länger ist.
  6. Eine Glasplatte, die mit einer Glasantenne (100; 200; 300) versehen ist nach irgendeinem der Ansprüche von 1 bis 4, wobei die Leiterlänge des vierten Elements (4) 150 mm beträgt oder länger ist.
  7. Eine Glasplatte, die mit einer Glasantenne (100; 200; 300) versehen ist nach irgendeinem der Ansprüche von 1 bis 6, wobei
    die Länge zwischen dem Abschlussende (e) des fünften Elements (5) und dem Ende des oberen Einspeiseabschnitts (16) 26 mm oder mehr und 40 mm oder weniger beträgt.
  8. Eine Glasplatte, die mit einer Glasantenne (100; 200) versehen ist nach irgendeinem der Ansprüche von 1 bis 7, wobei
    der Antennenleiter des Weiteren einen vierten Antennenleiter aufweist, und wobei
    der vierte Antennenleiter ein sechstes Element (6) beinhaltet, das sich ausgehend vom unteren Einspeisepunkt (17) als Startpunkt nach unten erstreckt.
  9. Eine Glasplatte, die mit einer Glasantenne (100; 200) versehen ist nach Anspruch 8, wobei
    eine Länge einer Leiterbahn, die auf kürzestem Weg ein Abschlussende (f) einer Verlängerung des sechsten Elements (6) und ein Ende des unteren Einspeisepunktes (17) verbindet, 0,07λg2 oder mehr und 0,2λg2 oder weniger beträgt.
  10. Eine Glasplatte, die mit einer Glasantenne (100; 200) versehen ist nach Anspruch 8, wobei
    eine Länge einer Leiterbahn, die auf kürzestem Weg ein Abschlussende (f) einer Verlängerung des sechsten Elements (6) und ein Ende des unteren Einspeisepunktes (17) verbindet, 12 mm oder mehr und 30 mm oder weniger beträgt.
  11. Eine Glasplatte, die mit einer Glasantenne (300) versehen ist nach irgendeinem der Ansprüche von 1 bis 10, wobei
    der zweite Antennenleiter ein siebtes Element (7) beinhaltet, das sich ausgehend von einem Abschlussende-Abschnitt (i) des vierten Elements (4) als Startpunkt nach links erstreckt.
  12. Eine Fahrzeug-Fensterscheibe (23) die eine Glasplatte umfasst, die mit einer Glasantenne (100; 200; 300) versehen ist nach irgendeinem der Ansprüche von 1 bis 11.
EP11000784.6A 2010-02-01 2011-02-01 Glasantenne und Fahrzeugfensterscheibe, die diese Antenne beinhaltet Not-in-force EP2355237B1 (de)

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JP2010020749A JP2011160236A (ja) 2010-02-01 2010-02-01 ガラスアンテナ及びそれを備える車両用窓ガラス板

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JP6527325B2 (ja) 2014-12-08 2019-06-05 日本板硝子株式会社 車両リアクォーターガラス用アンテナ
JP7480571B2 (ja) 2020-04-22 2024-05-10 Ａｇｃ株式会社 車両用窓ガラス
JP7447716B2 (ja) 2020-07-13 2024-03-12 Ａｇｃ株式会社 車両用窓ガラス
KR20220118163A (ko) 2021-02-18 2022-08-25 현대자동차주식회사 접합 글라스 안테나 구조
KR20240019874A (ko) 2022-08-05 2024-02-14 현대자동차주식회사 접합 글라스 안테나 구조

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