WO2012070303A1 - Antenna - Google Patents

Antenna Download PDF

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Publication number
WO2012070303A1
WO2012070303A1 PCT/JP2011/071582 JP2011071582W WO2012070303A1 WO 2012070303 A1 WO2012070303 A1 WO 2012070303A1 JP 2011071582 W JP2011071582 W JP 2011071582W WO 2012070303 A1 WO2012070303 A1 WO 2012070303A1
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WO
WIPO (PCT)
Prior art keywords
hot
ground
wire
filament
feeding point
Prior art date
Application number
PCT/JP2011/071582
Other languages
French (fr)
Japanese (ja)
Inventor
友嗣 片田
山本　政博
Original Assignee
セントラル硝子株式会社
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 セントラル硝子株式会社 filed Critical セントラル硝子株式会社
Priority to EP11843713.6A priority Critical patent/EP2645473A1/en
Priority to CN2011800564422A priority patent/CN103222112A/en
Publication of WO2012070303A1 publication Critical patent/WO2012070303A1/en

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Classifications

    • 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
    • H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
    • 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
    • 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 an antenna device, and more particularly to an antenna that is provided on an automobile window glass and is suitable for receiving digital terrestrial broadcast waves.
  • Japanese Patent Application Laid-Open No. 2009-164678 by the present applicant proposes a terrestrial digital line antenna provided in a defogger upper margin of a rear window glass of an automobile.
  • Japanese Patent Application Laid-Open No. 2009-33687 by the present applicant proposes a terrestrial digital linear antenna provided at a corner portion of a front window glass, a rear window glass, and a side window glass of an automobile. .
  • the antenna described in Japanese Patent Application Laid-Open No. 2009-164678 is a linear antenna disposed on the rear window glass which is difficult to obtain high antenna performance due to the influence of the defogger.
  • the area occupied by the antenna is as large as about 50 mm to 100 mm in both the vertical and horizontal directions.
  • the antenna described in Japanese Patent Application Laid-Open No. 2009-33687 has a smaller area than the antenna described in Patent Document 1, but is usually formed in a band shape around the inside of the window glass of an automobile.
  • the antenna When the antenna is disposed on the black ceramic layer, the antenna cannot be covered with the ceramic layer, so that the antenna becomes conspicuous when viewed from the outside of the vehicle.
  • the present invention has been made in view of such a problem, and the area occupied by the glass antenna is small and the surrounding area of the vehicle window glass is ensured while ensuring the antenna receiving performance higher than that of conventional terrestrial digital television broadcast waves.
  • An object of the present invention is to provide an inconspicuous glass antenna by making the whole antenna easy to be covered with the black ceramic layer formed on the surface.
  • the present invention is an antenna provided on a window glass of a vehicle and provided with a hot side element and a ground side element, at a position close to the upper corner of the metal flange constituting the opening of the window,
  • a hot-side feed point and a ground-side feed point are provided so as to be arranged side by side, the hot-side element is connected to the hot-side feed point, and the ground-side element is connected to the ground-side feed point.
  • the hot side element extends substantially horizontally along the metal flange in a direction away from the hot side feeding point, the ground side element has a ground side first filament, and further includes a ground side second.
  • the ground-side first wire being connected to the ground-side feeding point, extending downward along the metal flange
  • the earth-side second filament is connected to the earth-side feeding point, and extends below the center side of the window glass substantially parallel to the earth-side first filament from the earth-side first filament
  • the ground-side third filament is connected to the ground-side feeding point and extends upward on the center side of the window glass from the ground-side feeding point and the hot-side feeding point.
  • the antenna pattern can be reduced without deteriorating the antenna performance.
  • the front enlarged view of the antenna pattern of Example 1 of this invention The front enlarged view of the antenna pattern of Example 2 of this invention.
  • the front enlarged view of the antenna pattern of Example 8 of this invention The front enlarged view of the antenna pattern of a comparative example.
  • BRIEF DESCRIPTION OF THE DRAWINGS The whole figure which provided the glass antenna of Example 1 of this invention in the front window glass of the motor vehicle.
  • the frequency characteristic figure of a comparative example and Example 1 of this invention The frequency characteristic figure of a comparative example and Example 7 of this invention.
  • the present invention relates to a glass antenna that is provided in the vicinity of the upper corner of the front window glass of an automobile and that can receive a terrestrial digital television broadcast wave having a frequency of 470 MHz to 710 MHz with high performance.
  • a hot-side feeding point 3 and a ground-side feeding point 4 are provided in the vicinity of a corner portion of a window glass plate 2 and connected to the hot-side feeding point 3.
  • the hot-side element 10 and the ground-side element 20 connected to the ground-side feeding point 4 are connected to the hot-side feeding point 3 and the ground-side feeding point 4 respectively.
  • the core wire and the outer conductor are connected.
  • the hot-side element 10 is connected to the hot-side first wire 11 connected to the hot-side feeding point 3 and the tip of the hot-side first wire 11 and extends along the upper portion of the body flange 1 (for example, the body flange (In a horizontal direction parallel to the upper portion of 1) and the hot-side second filament 12.
  • the hot-side first filament 11 extends obliquely upward toward the center line direction of the window glass 2, but may extend substantially horizontally or vertically upward. Further, the hot-side first filament 11 may not be provided, and the hot-side second filament 12 may be directly connected to the hot-side feeding point 3 as shown in FIG.
  • the length of the hot-side second filament 12 and the distance from the body flange 1 are adjusted so as to obtain suitable reception performance. can do.
  • the total length of the hot-side first filament 11 and the hot-side second filament 12 is ⁇ ⁇ ⁇ / 6 to ⁇ ⁇ ⁇ / 2 ( ⁇ : wavelength reduction rate of glass, ( ⁇ : wavelength of the center frequency of the received radio wave) and the distance between the hot second filament and the upper portion of the body flange 1 is 10 mm to 25 mm, it is possible to obtain suitable reception performance.
  • the earth side element 20 is composed of a ground side first wire 21, a ground side second wire, and a ground side third wire.
  • the ground-side second wire has an L-shape composed of a downward wire 22 and a connecting wire 24 of the ground-side second wire, and the ground-side third wire is the ground-side wire.
  • the upward line 23 and the connecting line 24 of the three wires form an L shape. All of the ground side first wire, the ground side second wire, and the ground side third wire are connected to the ground side feed point 4.
  • the connecting wire may have one wire 24 shared by the ground-side second wire and the ground-side third wire. As shown in FIG. The connecting wire 24 of the side second wire and the connecting wire 25 of the ground side third wire may be provided separately.
  • the first ground wire 21 is extended along the side of the body flange 1 from the ground side feeding point 4 (for example, vertically downward parallel to the side of the body flange 1). By changing one or both of the length of the ground-side first wire 21 and the distance between the ground-side first wire 21 and the side portion of the body flange 1, the grounding is performed so that suitable reception performance can be obtained. The capacitance between the first side filament 21 and the body flange 1 can be adjusted.
  • the length of the ground-side first filament 21 is ⁇ ⁇ ⁇ / 4 to ⁇ ⁇ ⁇ / 2 ( ⁇ is the wavelength of the center frequency of the reception band), and the ground-side first filament 21 and the body flange 1 side
  • a suitable reception performance can be obtained by adjusting the distance to the unit to 5 mm to 75 mm.
  • the downward line 22 of the ground side second line is arranged in parallel with the ground side first line 21.
  • the ground side second wire is the ground side first wire. It is possible to obtain the same effect as if it is electrically strongly coupled to the strip and widen the line width of the ground-side first strip, and the reception performance of the antenna can be improved.
  • the distance a between the ground-side first wire 21 and the downward-side wire 22 of the ground-side second wire is preferably ⁇ ⁇ ⁇ / 50 to ⁇ ⁇ ⁇ / 10. This is because, if the interval is wider than this range, the electrical coupling between the ground side second wire and the ground side first wire is weakened, so that an optimum impedance cannot be obtained.
  • the impedance of the antenna can be adjusted by adjusting the length of the third wire on the ground side. And by this impedance adjustment, the antenna can be widened. For example, when the length of the ground-side third filament is adjusted between ⁇ ⁇ ⁇ / 20 and ⁇ ⁇ ⁇ / 5 (where ⁇ is the wavelength of the center frequency of the reception band), good antenna performance can be obtained. it can.
  • the distance b between the hot-side feed point 3 and the ground-side third filament is preferably ⁇ ⁇ ⁇ / 50 or more. This is because if the distance b is less than ⁇ ⁇ ⁇ / 50, the electrical coupling between the ground-side third wire and the hot-side feeding point 3 becomes strong, and the antenna performance deteriorates.
  • the ground side element 20 is composed of three wires, a ground side first wire 21, a ground side second wire, and a ground side third wire.
  • the ground side second wire may not be provided, and the ground side first wire and the ground side third wire may be used.
  • the ground side third wire may not be provided, and only the ground side first wire and the ground side second wire may be configured.
  • the ground side element 20 may be constituted by a ground side first wire, a ground side second wire, and a ground side third wire.
  • the ground-side second wire is directly connected to the ground-side feeding point 4.
  • the ground-side second wire and the ground-side third wire share all of the connecting wires 24.
  • the downward line 22 is connected in the middle of the connection line 24, the upward line 23 of the ground side third line is connected to the tip of the connection line 24, and a part of the connection line 24 is shared. May be.
  • the downward line 22 of the ground side second wire is connected to the tip of the connection line 24, and the upward line 23 of the ground side third line is connected to the middle of the connection line 24. Good.
  • the ground side second wire and the ground side third wire share the connection wire 24, but the connection wire for the ground side second wire and the ground side second wire Connection wires for three wires are separately provided, and the ground side second wire and the ground side third wire are separately extended from the ground side feeding point 4 so as not to have a shared portion. Good.
  • the hot side element 10 is provided with a hot side third filament 13 substantially parallel to the hot side second filament 12 in addition to the hot side second filament 12. Also good. That is, the hot side third filament 13 is configured by a substantially horizontal filament 13a and a substantially vertical filament 13b.
  • the hot-side third filament 13 is an element mainly provided for impedance adjustment, and good antenna performance is obtained by setting the length of the hot-side third filament to ⁇ ⁇ ⁇ / 6 or less. Can do.
  • the hot-side third filament 13 can be connected to any position of the hot-side first filament 11 and the hot-side second filament 12.
  • one end of the substantially vertical filament 13 b is connected to the tip of the hot-side first filament 11.
  • one end of the substantially vertical line 13 b is directly connected to the hot-side feeding point 3.
  • the hot-side third filament 13 may be configured by only the substantially horizontal filament 13a, and the substantially horizontal filament 13a may be directly connected to the hot-side feeding point 3.
  • the hot side fourth filament that extends in a different direction from the hot side second filament 12.
  • the hot side element 10 may be constituted by 14.
  • the hot-side fourth wire 14 is directly connected to the hot-side feeding point 3.
  • the hot-side fourth wire 14 is composed of a horizontal wire 14b connected to the hot-side feeding point 3 and a downward wire 14a connected to the tip of the horizontal wire 14b.
  • the downward wire 14a is electrically and capacitively coupled to the upward wire 23 by being arranged in parallel and close to the upward wire 23 of the ground side third wire, and the hot-side fourth wire 14a.
  • the antenna of the embodiment of the present invention has an antenna pattern arranged in line symmetry with respect to the center line of the front window glass at the symmetrical position of the front window glass.
  • An antenna that performs diversity reception may be configured.
  • the antenna of the present embodiment is formed by printing a width of each filament at 0.7 mm with a conductive ceramic paste at a predetermined position on the indoor surface side of the window glass 2, drying, and baking by a heating furnace.
  • An antenna pattern may be provided on the surface of another insulator.
  • the antenna attached to the window glass of a building, a wall surface, and a roof may be sufficient.
  • the antenna pattern may be formed by directly printing on the surface of the window glass 1 of the vehicle, or the antenna pattern may be formed on a synthetic resin sheet to be attached to a desired position of the window glass 1.
  • the core wire of a coaxial cable (not shown) extended from a tuner (not shown) is connected to the hot side feed point 3 and the outer conductor is connected to the ground side feed point 4.
  • the antenna pattern can be reduced without deteriorating the antenna performance. For this reason, most of the antenna pattern can be covered with the black ceramic layer formed on the peripheral edge of the front window glass, and the glass antenna can be arranged so as not to stand out and disturb the visual field. Moreover, since the pattern of the glass antenna has become simple, the development man-hours for tuning can be reduced.
  • FIG. 1 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 1 of the present invention.
  • the hot-side feeding point 3 and the ground-side feeding point 4 are installed close to each other so as to be close to the upper corner portion of the front window glass.
  • the hot element 10 is connected, and the earth element 20 is connected to the earth feeding point 4.
  • the hot-side element 10 is connected to the hot-side power feeding point 3, is connected to the hot-side first filament 11 extending obliquely upward, the tip of the hot-side first filament 11, and parallel to the upper portion of the body flange 1. It is comprised from the hot side 2nd filament 12 to extend
  • the ground-side element 20 includes a ground-side first wire 21, a ground-side second wire-down wire 22, an earth-side third wire-up wire 23, and a ground-side second wire and a ground-side wire.
  • the connecting line 24 is shared by the three lines.
  • the ground-side first wire 21 extends in parallel with the side portion of the body flange 1, and one end of the wire is connected to the ground-side feeding point 4 and extends downward from the ground-side feeding point 4. It is a filament.
  • connection wire 24 extending in the center line direction of the window glass 1, and the ground-side first wire downward from the tip of the connection wire 24. It is an L-shaped line composed of downward line 22 extending in parallel with the line.
  • the ground-side third filament is an L-shaped filament composed of a connection filament 24 and an upward filament 23 extending upward from the tip of the connection filament 24.
  • the length of each wire of the antenna of the present embodiment is such that the length of the hot side first wire 11 is 20 mm, the length of the hot side second wire 12 is 50 mm, and the ground side first
  • the length of the line 21 is 100 mm
  • the length of the connecting line 24 is 5 mm
  • the length of the downward line 22 of the ground side second line 80 is 80 mm
  • the upward line of the ground side third line The length of the strip 23 is 40 mm.
  • the distance between the hot second wire 12 and the upper portion of the body flange 1 is 15 mm, and the distance between the ground first wire 21 and the side of the body flange 1 is 15 mm.
  • Each of the hot-side feeding point 3 and the ground-side feeding point 4 has a square solid pattern with a side of 10 mm, and a hot-side terminal and a ground-side terminal of a feeding terminal (not shown) are connected to each feeding point. ing.
  • the distance between the apex closest to the body flange 1 of the hot-side feeding point 3 and the body flange 1 is 6 mm, and the distance between the hot-side feeding point 3 and the ground-side feeding point 4 is 20 mm.
  • the glass antenna of this example is obtained by adjusting the size of each element so as to match the frequency (620 MHz) in the vicinity of the center frequency of terrestrial digital broadcasting, assuming that the wavelength shortening rate ⁇ of the glass is 0.7.
  • the dimensions are not limited to the dimensions described above.
  • the performance of the antenna of the present embodiment is based on a comparison of the frequency characteristic diagrams of the antenna of the first embodiment shown in FIG. 12 and the antenna of the comparative example of FIG. 9 described later (solid line: Example 1, broken line: comparative example). I can understand.
  • FIG. 12 shows the results of measurement with the antenna of Example 1 and the antenna of the comparative example provided on the front window glass 2 attached to a vehicle. From FIG. 12, it can be seen that the antenna of Example 1 has higher performance than the antenna of the comparative example at almost all frequencies of 470 MHz to 710 MHz, which is the frequency band of terrestrial digital broadcasting.
  • FIG. 10 shows two antennas of Example 1 provided in the upper corner portion of the front window 2. As shown in FIG. 10, by performing diversity reception with two antennas, it is possible to obtain a higher reception performance than when only one antenna pattern is provided.
  • FIG. 2 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 2 of the present invention.
  • the antenna of the second embodiment is different from the antenna of the first embodiment in that the second ground wire is not provided, and is the same as the antenna of the first embodiment in other points. For this reason, the same code
  • FIG. 3 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 3 of the present invention.
  • the upward line 23 of the ground side third line is connected to the tip of the connection line 24, and the downward line of the ground side second line is in the middle of the connection line 24.
  • the configuration differs from the antenna of the first embodiment in that 22 is connected. That is, in the antenna of Example 3, the ground side second wire and the ground side third wire share only a part of the connection wire 24.
  • FIG. 4 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 4 of the present invention.
  • the antenna of the fourth embodiment is different from the antenna of the second embodiment in that the hot side third wire 13 is further connected to the connecting portion between the hot side first wire and the hot side second wire, Other points are the same as those of the antenna of the second embodiment. For this reason, the same code
  • the hot-side third filament 13 is connected to the substantially vertical filament 13b extending downward from the connection portion between the hot-side first filament and the hot-side second filament, and to the tip of the approximately vertical filament 13b. It is comprised from the substantially horizontal filament 13a extended
  • the impedance becomes low and good antenna performance is obtained.
  • the hot side third filament 13 and the hot side first filament 11 and The antenna impedance varies depending on the connection position with the hot-side second filament 12. For this reason, it is good to adjust the length of the hot side 3rd filament 13 so that favorable antenna performance may be obtained.
  • FIG. 5 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 5 of the present invention.
  • the antenna of the fifth embodiment is different from the antenna of the first embodiment in that the hot-side third wire 13 is connected to the hot-side feeding point 3 and the ground-side third wire is not provided from the ground-side element 20.
  • the other points are the same as those of the antenna of the first embodiment. For this reason, the same code
  • the impedance can be adjusted by adjusting the length of the hot-side third filament 13, and good antenna performance can be obtained.
  • FIG. 6 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 6 of the present invention.
  • the antenna of Example 6 differs from the antenna of Example 2 in that the hot-side fourth filament 14 is provided, and is otherwise the same as the antenna of Example 2. For this reason, the same code
  • the hot-side fourth wire 14 is connected to the hot-side feeding point 3 and connected to the horizontal wire 14b extending in the center line direction of the window glass 2 and the tip of the horizontal wire 14b, and the ground-side third wire It is comprised from the downward line 14a extended
  • the size of the ground side third filament is changed and adjusted from that of Example 2 so that good antenna performance can be obtained.
  • the length is the same as that of the antenna line in Example 2.
  • FIG. 7 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 7 of the present invention.
  • the antenna of Example 7 does not include the hot-side first filament 11 and the hot-side third filament 13, but the hot-side second filament is directly connected to the hot-side feeding point 3. Unlike the antenna 5, the other points are the same as those of the antenna of the fifth embodiment. For this reason, the same code
  • the lengths of the antennas of this embodiment are such that the length of the hot second wire is 50 mm, the length of the ground first wire 21 is 110 mm, and the ground side second wire.
  • the length of the connecting wire 24 of the strip is 20 mm, and the length of the downward strip 22 of the ground-side second strip is 85 mm.
  • the distance between the hot second wire 12 and the upper portion of the body flange 1 is 15 mm, and the distance between the ground first wire 21 and the side of the body flange 1 is 15 mm.
  • Each of the hot-side feeding point 3 and the ground-side feeding point 4 has a square solid pattern with a side of 10 mm, and a hot-side terminal and a ground-side terminal of a feeding terminal (not shown) are connected to each feeding point. ing.
  • the distance between the apex closest to the body flange 1 of the hot-side feeding point 3 and the body flange 1 is 6 mm, and the distance between the hot-side feeding point 3 and the ground-side feeding point 4 is 20 mm.
  • FIG. 8 shows an antenna pattern of Example 8 of the present invention, and is a front enlarged view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile.
  • the antenna of the eighth embodiment is different from the antenna of the first embodiment in that the connecting wire 24 is not shared by the ground side second wire and the ground side third wire. 1 antenna. For this reason, the same code
  • the earth side element 20 includes a ground side first filament 21, a ground side second filament, and a ground side third filament.
  • the ground-side second wire is composed of a connecting wire 24 connected to the ground-side feeding point 4 and a downward wire 22 connected to the tip of the connecting wire 24.
  • the ground side third wire is composed of a connecting wire 25 connected to the ground side feeding point 4 and an upward wire 23 connected to the tip of the connecting wire 25.
  • the downward line 22 may be connected in the middle of the connection line 24 instead of the tip of the connection line 24.
  • the upward line 23 may be connected in the middle of the connection line 25 instead of the tip of the connection line 25.
  • the glass antenna of this example is obtained by adjusting the size of each element so as to match the frequency (620 MHz) in the vicinity of the center frequency of terrestrial digital broadcasting, assuming that the wavelength shortening rate ⁇ of the glass is 0.7.
  • the dimensions are not limited to the dimensions described above.
  • the performance of the antenna of this example is based on a comparison of the frequency characteristic diagrams of the antenna of Example 7 shown in FIG. 13 and the antenna of the comparative example of FIG. 9 described later (solid line: Example 7, broken line: comparative example). I can understand.
  • FIG. 13 shows the results of measurement with the antenna of Example 1 and the antenna of the comparative example provided on the front window glass 2 attached to a vehicle. From FIG. 13, it can be seen that the antenna of Example 1 has higher performance than the antenna of the comparative example at almost all frequencies of 470 MHz to 710 MHz, which is the frequency band of terrestrial digital broadcasting.
  • FIG. 11 shows two antennas of Example 1 provided in the upper corner portion of the front window glass 2. As shown in FIG. 11, by performing diversity reception with two antennas, it is possible to obtain higher reception performance than when only one antenna is provided.
  • FIG. 9 shows an antenna pattern of a comparative example compared with the antenna of the present invention, and is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile.
  • the antenna of the comparative example is based on the antenna described in Patent Document 2, and the wavelength shortening rate ⁇ of the glass is assumed to be 0.7, and the length of each element is a frequency near the center frequency of terrestrial digital broadcasting (620 MHz). It is the antenna pattern adjusted to suit.
  • the hot-side feeding point 3 and the ground-side feeding point 4 are installed close to each other so as to be close to the upper corner portion of the front window glass.
  • the hot element 10 is connected, and the earth element 20 is connected to the earth feeding point 4.
  • the hot-side element 10 is connected to the hot-side power feeding point 3, is connected to the hot-side first filament 11 extending obliquely upward, the tip of the hot-side first filament 11, and parallel to the upper portion of the body flange 1.
  • the earth side element 20 is connected to the earth side feeding point 4 and is constituted only by the earth side first wire 21 extending vertically downward to the side portion of the body flange 1.
  • At least one of the ground side second wire and the ground side third wire for adjusting the impedance is connected to the ground side element.
  • the antenna of the example is different in that no impedance adjusting wire is connected to the ground side element.

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Abstract

This antenna is provided with a hot-side element and an earth-side element. The hot-side element extends roughly horizontally along a metal flange in a direction that separates from a hot-side power supply point. The earth-side element has an earth-side first line that extends downwards along the metal flange, and furthermore, has an earth-side second line that extends downwards roughly parallel to the earth-side first line and/or an earth-side third line that extends upwards and is on the center side of window glass with respect to the hot-side power supply point and an earth-side power supply point.

Description

アンテナantenna
　本発明は、アンテナ装置に関し、特に自動車用窓ガラスに設けられ、地上デジタル放送波の受信に好適なアンテナに関する。 The present invention relates to an antenna device, and more particularly to an antenna that is provided on an automobile window glass and is suitable for receiving digital terrestrial broadcast waves.
　従来、地上デジタル放送用ガラスアンテナとして、自動車の窓ガラスに設けられたアンテナが広く提案されている。 Conventionally, as a glass antenna for digital terrestrial broadcasting, an antenna provided on a window glass of an automobile has been widely proposed.
　例えば、本出願人による特開２００９－１６４６７８号公報には、自動車の後部窓ガラスのデフォッガ上部余白部に設ける地上デジタル用の線条アンテナが提案されている。 For example, Japanese Patent Application Laid-Open No. 2009-164678 by the present applicant proposes a terrestrial digital line antenna provided in a defogger upper margin of a rear window glass of an automobile.
　また、同じく本出願人による特開２００９－３３６８７号公報には、自動車の前部窓ガラス、後部窓ガラス、および側部窓ガラスのコーナー部に設ける地上デジタル用の線条アンテナが提案されている。 Similarly, Japanese Patent Application Laid-Open No. 2009-33687 by the present applicant proposes a terrestrial digital linear antenna provided at a corner portion of a front window glass, a rear window glass, and a side window glass of an automobile. .
　しかしながら、特開２００９－１６４６７８号公報に記載のアンテナは、デフォッガの影響のために高いアンテナ性能を得るのが難しい後部窓ガラスに配設される線条アンテナであり、高いアンテナ性能を得るためには、前記アンテナの占有面積は縦横それぞれ５０ｍｍ～１００ｍｍ程度と大きなものとなってしまう。 However, the antenna described in Japanese Patent Application Laid-Open No. 2009-164678 is a linear antenna disposed on the rear window glass which is difficult to obtain high antenna performance due to the influence of the defogger. In order to obtain high antenna performance The area occupied by the antenna is as large as about 50 mm to 100 mm in both the vertical and horizontal directions.
　また、特開２００９－３３６８７号公報に記載のアンテナは、特許文献１に記載のアンテナと比べると小面積化されてはいるが、自動車の窓ガラスの車内側の周辺に帯状に形成される通常黒色のセラミック層上に配設したときに、前記セラミック層で前記アンテナを覆えないため、車外から見たときに、アンテナが目立ってしまう。 Further, the antenna described in Japanese Patent Application Laid-Open No. 2009-33687 has a smaller area than the antenna described in Patent Document 1, but is usually formed in a band shape around the inside of the window glass of an automobile. When the antenna is disposed on the black ceramic layer, the antenna cannot be covered with the ceramic layer, so that the antenna becomes conspicuous when viewed from the outside of the vehicle.
　本発明は、このような問題点に鑑みてなされたものであり、地上デジタルテレビ放送波に対して従来以上のアンテナ受信性能を確保しつつ、ガラスアンテナの占有面積が小さく、車両用窓ガラス周辺に形成される黒色のセラミック層によってアンテナ全体が覆われやすい構成とすることで、目立たないガラスアンテナの提供を目的とするものである。 The present invention has been made in view of such a problem, and the area occupied by the glass antenna is small and the surrounding area of the vehicle window glass is ensured while ensuring the antenna receiving performance higher than that of conventional terrestrial digital television broadcast waves. An object of the present invention is to provide an inconspicuous glass antenna by making the whole antenna easy to be covered with the black ceramic layer formed on the surface.
　すなわち、本発明は、車両の窓ガラスに設けられ、ホット側エレメントと、アース側エレメントとを備えるアンテナであって、前記窓の開口部を構成する金属フランジの上側角部に近接する位置に、並んで配置されるように、ホット側給電点とアース側給電点とを備え、前記ホット側エレメントは、前記ホット側給電点に接続され、前記アース側エレメントは、前記アース側給電点に接続され、前記ホット側エレメントは、前記ホット側給電点から離れる方向に前記金属フランジに沿って略水平に延伸し、前記アース側エレメントは、アース側第１線条を有し、さらに、アース側第２線条とアース側第３線条との少なくとも一方を有し、前記アース側第１線条は、前記アース側給電点に接続され、前記金属フランジに沿って下方に延伸し、前記アース側第２線条は、前記アース側給電点に接続され、前記アース側第１線条よりも窓ガラスの中心側を、前記アース側第１線条と略平行に下方に延伸し、前記アース側第３線条は、前記アース側給電点に接続され、前記アース側給電点および前記ホット側給電点より前記窓ガラスの中心側で、上方に延伸することを特徴とする。 That is, the present invention is an antenna provided on a window glass of a vehicle and provided with a hot side element and a ground side element, at a position close to the upper corner of the metal flange constituting the opening of the window, A hot-side feed point and a ground-side feed point are provided so as to be arranged side by side, the hot-side element is connected to the hot-side feed point, and the ground-side element is connected to the ground-side feed point. The hot side element extends substantially horizontally along the metal flange in a direction away from the hot side feeding point, the ground side element has a ground side first filament, and further includes a ground side second. Having at least one of a wire and a ground-side third wire, the ground-side first wire being connected to the ground-side feeding point, extending downward along the metal flange, The earth-side second filament is connected to the earth-side feeding point, and extends below the center side of the window glass substantially parallel to the earth-side first filament from the earth-side first filament, The ground-side third filament is connected to the ground-side feeding point and extends upward on the center side of the window glass from the ground-side feeding point and the hot-side feeding point.
　本発明によれば、アンテナ性能を悪化させることなく、アンテナパターンを小さくできる。 According to the present invention, the antenna pattern can be reduced without deteriorating the antenna performance.
本発明の実施例１のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 1 of this invention. 本発明の実施例２のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 2 of this invention. 本発明の実施例３のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 3 of this invention. 本発明の実施例４のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 4 of this invention. 本発明の実施例５のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 5 of this invention. 本発明の実施例６のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 6 of this invention. 本発明の実施例７のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 7 of this invention. 本発明の実施例８のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of Example 8 of this invention. 比較例のアンテナパターンの正面拡大図。The front enlarged view of the antenna pattern of a comparative example. 本発明の実施例１のガラスアンテナを自動車の前部窓ガラスに設けた全体図。BRIEF DESCRIPTION OF THE DRAWINGS The whole figure which provided the glass antenna of Example 1 of this invention in the front window glass of the motor vehicle. 本発明の実施例７のガラスアンテナを自動車の前部窓ガラスに設けた全体図。The whole figure which provided the glass antenna of Example 7 of the present invention in the front window glass of a car. 比較例と本発明の実施例１の周波数特性図。The frequency characteristic figure of a comparative example and Example 1 of this invention. 比較例と本発明の実施例７の周波数特性図。The frequency characteristic figure of a comparative example and Example 7 of this invention.
　本発明は、自動車の前部窓ガラスの上辺コーナー部近傍に設けられる、周波数が４７０ＭＨｚ～７１０ＭＨｚの地上デジタルテレビ放送波を高性能で受信できるガラスアンテナに関する。 The present invention relates to a glass antenna that is provided in the vicinity of the upper corner of the front window glass of an automobile and that can receive a terrestrial digital television broadcast wave having a frequency of 470 MHz to 710 MHz with high performance.
　図１に示すように、本発明のガラスアンテナは、窓ガラス板２のコーナー部近傍に、ホット側給電点３とアース側給電点４とが近接して設けられ、ホット側給電点３に接続されるホット側エレメント１０と、アース側給電点４に接続されるアース側エレメント２０との二つのエレメントからなっており、ホット側給電点３と、アース側給電点４とには、それぞれ同軸ケーブルの芯線と外皮導体とが接続される。 As shown in FIG. 1, in the glass antenna of the present invention, a hot-side feeding point 3 and a ground-side feeding point 4 are provided in the vicinity of a corner portion of a window glass plate 2 and connected to the hot-side feeding point 3. The hot-side element 10 and the ground-side element 20 connected to the ground-side feeding point 4 are connected to the hot-side feeding point 3 and the ground-side feeding point 4 respectively. The core wire and the outer conductor are connected.
　ホット側エレメント１０は、ホット側給電点３に接続されるホット側第１線条１１と、ホット側第１線条１１の先端に接続され、ボディーフランジ１の上部に沿った（例えば、ボディーフランジ１の上部と平行な水平方向に）ホット側第２線条１２とから構成される。ホット側第１線条１１は、窓ガラス２の中心線方向に向けて斜め上方に延伸したが、略水平に、または垂直上方に延伸してもよい。さらに、ホット側第１線条１１を設けず、図７に示すようにホット側第２線条１２を、直接、ホット側給電点３に接続してもよい。 The hot-side element 10 is connected to the hot-side first wire 11 connected to the hot-side feeding point 3 and the tip of the hot-side first wire 11 and extends along the upper portion of the body flange 1 (for example, the body flange (In a horizontal direction parallel to the upper portion of 1) and the hot-side second filament 12. The hot-side first filament 11 extends obliquely upward toward the center line direction of the window glass 2, but may extend substantially horizontally or vertically upward. Further, the hot-side first filament 11 may not be provided, and the hot-side second filament 12 may be directly connected to the hot-side feeding point 3 as shown in FIG.
　ホット側第１線条１１の傾きと長さとを適切に調整することによって、好適な受信性能を得られるように、ホット側第２線条１２の長さと、ボディーフランジ１との間隔とを調整することができる。 By adjusting the inclination and length of the hot-side first filament 11 appropriately, the length of the hot-side second filament 12 and the distance from the body flange 1 are adjusted so as to obtain suitable reception performance. can do.
　発明者の実験によると、ホット側第１線条１１とホット側第２線条１２との長さの合計は、α・λ／６～α・λ／２（α：ガラスの波長短縮率、λ：受信電波の中心周波数の波長）であり、ホット側第２線条とボディーフランジ１の上部との間隔が、１０ｍｍ～２５ｍｍであるときに、好適な受信性能を得ることができる。 According to the inventor's experiment, the total length of the hot-side first filament 11 and the hot-side second filament 12 is α · λ / 6 to α · λ / 2 (α: wavelength reduction rate of glass, (λ: wavelength of the center frequency of the received radio wave) and the distance between the hot second filament and the upper portion of the body flange 1 is 10 mm to 25 mm, it is possible to obtain suitable reception performance.
　アース側エレメント２０は、アース側第１線条２１、アース側第２線条およびアース側第３線条とから構成されている。アース側第２線条は、アース側第２線条の下向線条２２と接続線条２４とで構成されるＬ字形状を構成しており、アース側第３線条は、アース側第３線条の上向線条２３と接続線条２４とでＬ字形状を構成している。アース側第１線条、アース側第２線条およびアース側第３線条のいずれもが、アース側給電点４に接続されている。 The earth side element 20 is composed of a ground side first wire 21, a ground side second wire, and a ground side third wire. The ground-side second wire has an L-shape composed of a downward wire 22 and a connecting wire 24 of the ground-side second wire, and the ground-side third wire is the ground-side wire. The upward line 23 and the connecting line 24 of the three wires form an L shape. All of the ground side first wire, the ground side second wire, and the ground side third wire are connected to the ground side feed point 4.
　なお、接続線条は、図１に示すように、１本の線条２４がアース側第２線条とアース側第３線条とで共用されてもよく、図５に示すように、アース側第２線条の接続線条２４とアース側第３線条の接続線条２５とが別個に設けられてもよい。 As shown in FIG. 1, the connecting wire may have one wire 24 shared by the ground-side second wire and the ground-side third wire. As shown in FIG. The connecting wire 24 of the side second wire and the connecting wire 25 of the ground side third wire may be provided separately.
　アース側第１線条２１は、アース側給電点４からボディーフランジ１の側部に沿って（例えば、ボディーフランジ１の側部と平行な垂直下方に）延伸される。アース側第１線条２１の長さ、およびアース側第１線条２１とボディーフランジ１の側部との間隔の一方または両方を変化させることによって、好適な受信性能が得られるように、アース側第１線条２１とボディーフランジ１との間の静電容量を調整することができる。 The first ground wire 21 is extended along the side of the body flange 1 from the ground side feeding point 4 (for example, vertically downward parallel to the side of the body flange 1). By changing one or both of the length of the ground-side first wire 21 and the distance between the ground-side first wire 21 and the side portion of the body flange 1, the grounding is performed so that suitable reception performance can be obtained. The capacitance between the first side filament 21 and the body flange 1 can be adjusted.
　例えば、アース側第１線条２１の長さをα・λ／４～α・λ／２（λは受信帯域の中心周波数の波長）とし、アース側第１線条２１とボディーフランジ１の側部との間隔を５ｍｍ～７５ｍｍに調整することによって、好適な受信性能が得られる。 For example, the length of the ground-side first filament 21 is α · λ / 4 to α · λ / 2 (λ is the wavelength of the center frequency of the reception band), and the ground-side first filament 21 and the body flange 1 side A suitable reception performance can be obtained by adjusting the distance to the unit to 5 mm to 75 mm.
　アース側第２線条の下向線条２２は、アース側第１線条２１と並列に配置される。アース側第２線条の長さをα・λ／２０～α・λ／２（λは受信帯域の中心周波数の波長）としたときに、アース側第２線条は、アース側第１線条と電気的に強く結合し、あたかもアース側第１線条の線幅を広げるのと同じ効果が得られ、アンテナの受信性能を向上させることができる。 The downward line 22 of the ground side second line is arranged in parallel with the ground side first line 21. When the length of the ground side second wire is α · λ / 20 to α · λ / 2 (λ is the wavelength of the center frequency of the reception band), the ground side second wire is the ground side first wire. It is possible to obtain the same effect as if it is electrically strongly coupled to the strip and widen the line width of the ground-side first strip, and the reception performance of the antenna can be improved.
　しかしながら、アース側第１線条２１とアース側第２線条の下向線条２２との間隔ａは、α・λ／５０～α・λ／１０であることが望ましい。これは、この範囲よりも間隔が広くなってしまうと、アース側第２線条とアース側第１線条との電気的な結合が弱くなるため、最適なインピーダンスを得られないからである。 However, the distance a between the ground-side first wire 21 and the downward-side wire 22 of the ground-side second wire is preferably α · λ / 50 to α · λ / 10. This is because, if the interval is wider than this range, the electrical coupling between the ground side second wire and the ground side first wire is weakened, so that an optimum impedance cannot be obtained.
　アース側第３線条は、その長さを調整することによって、アンテナのインピーダンスを調整することができる。そして、このインピーダンス調整によって、アンテナを広帯域化させることができる。例えば、アース側第３線条の長さをα・λ／２０～α・λ／５（λは受信帯域の中心周波数の波長）の間で調整したときに、良好なアンテナ性能を得ることができる。 The impedance of the antenna can be adjusted by adjusting the length of the third wire on the ground side. And by this impedance adjustment, the antenna can be widened. For example, when the length of the ground-side third filament is adjusted between α · λ / 20 and α · λ / 5 (where λ is the wavelength of the center frequency of the reception band), good antenna performance can be obtained. it can.
　ホット側給電点３とアース側第３線条との間隔ｂは、α・λ／５０以上であることが望ましい。この間隔ｂが、α・λ／５０未満であると、アース側第３線条とホット側給電点３との電気的な結合が強くなるため、アンテナ性能が悪化するからである。 The distance b between the hot-side feed point 3 and the ground-side third filament is preferably α · λ / 50 or more. This is because if the distance b is less than α · λ / 50, the electrical coupling between the ground-side third wire and the hot-side feeding point 3 becomes strong, and the antenna performance deteriorates.
　図１において、アース側エレメント２０は、アース側第１線条２１、アース側第２線条およびアース側第３線条の３本の線条で構成されているが、図２、図４および図６に示すように、アース側第２線条を備えず、アース側第１線条とアース側第３線条のみで構成してもよい。また、図５および図７に示すように、アース側第３線条を備えず、アース側第１線条とアース側第２線条のみで構成してもよい。 In FIG. 1, the ground side element 20 is composed of three wires, a ground side first wire 21, a ground side second wire, and a ground side third wire. As shown in FIG. 6, the ground side second wire may not be provided, and the ground side first wire and the ground side third wire may be used. Moreover, as shown in FIG. 5 and FIG. 7, the ground side third wire may not be provided, and only the ground side first wire and the ground side second wire may be configured.
　さらに、アース側エレメント２０は、アース側第１線条とアース側第２線条とアース側第３線条によって構成してもよい。この場合、アース側第２線条はアース側給電点４に、直接、接続される。 Furthermore, the ground side element 20 may be constituted by a ground side first wire, a ground side second wire, and a ground side third wire. In this case, the ground-side second wire is directly connected to the ground-side feeding point 4.
　また、図１においては、アース側第２線条とアース側第３線条とが、接続線条２４の全部を共有しているが、図３に示すように、アース側第２線条の下向線条２２を接続線条２４の途中に接続し、アース側第３線条の上向線条２３を接続線条２４の先端に接続して、接続線条２４の一部を共有してもよい。または、アース側第２線条の下向線条２２を、接続線条２４の先端に接続し、アース側第３線条の上向線条２３を接続線条２４の途中に接続してもよい。 In FIG. 1, the ground-side second wire and the ground-side third wire share all of the connecting wires 24. As shown in FIG. The downward line 22 is connected in the middle of the connection line 24, the upward line 23 of the ground side third line is connected to the tip of the connection line 24, and a part of the connection line 24 is shared. May be. Alternatively, the downward line 22 of the ground side second wire is connected to the tip of the connection line 24, and the upward line 23 of the ground side third line is connected to the middle of the connection line 24. Good.
　図１および図３においては、アース側第２線条とアース側第３線条とは、接続線条２４を共有しているが、アース側第２線条用の接続線条とアース側第３線条用の接続線条とを別々に設け、アース側第２線条とアース側第３線条とをアース側給電点４から別々に延伸し、共有部分をもたないようにしてもよい。 In FIG. 1 and FIG. 3, the ground side second wire and the ground side third wire share the connection wire 24, but the connection wire for the ground side second wire and the ground side second wire Connection wires for three wires are separately provided, and the ground side second wire and the ground side third wire are separately extended from the ground side feeding point 4 so as not to have a shared portion. Good.
　また、図４、図５に示すように、ホット側エレメント１０に、ホット側第２線条１２の他に、ホット側第２線条１２と略平行なホット側第３線条１３を設けてもよい。すなわち、ホット側第３線条１３は、略水平線条１３ａと略垂直線条１３ｂとで構成されている。 As shown in FIGS. 4 and 5, the hot side element 10 is provided with a hot side third filament 13 substantially parallel to the hot side second filament 12 in addition to the hot side second filament 12. Also good. That is, the hot side third filament 13 is configured by a substantially horizontal filament 13a and a substantially vertical filament 13b.
　ホット側第３線条１３は、主にインピーダンス調整のために設けられるエレメントであり、ホット側第３線条の長さをα・λ／６以下にすることで、良好なアンテナ性能を得ることができる。 The hot-side third filament 13 is an element mainly provided for impedance adjustment, and good antenna performance is obtained by setting the length of the hot-side third filament to α · λ / 6 or less. Can do.
　また、ホット側第３線条１３は、ホット側第１線条１１およびホット側第２線条１２の任意の位置に接続することができる。例えば、図４に示すアンテナにおいて、略垂直線条１３ｂの一端は、ホット側第１線条１１の先端に接続されている。また、図５に示すアンテナにおいて、略垂直線条１３ｂの一端は、ホット側給電点３に、直接、接続されている。 Also, the hot-side third filament 13 can be connected to any position of the hot-side first filament 11 and the hot-side second filament 12. For example, in the antenna shown in FIG. 4, one end of the substantially vertical filament 13 b is connected to the tip of the hot-side first filament 11. In the antenna shown in FIG. 5, one end of the substantially vertical line 13 b is directly connected to the hot-side feeding point 3.
　さらに、ホット側第３線条１３は、略水平線条１３ａのみで構成し、略水平線条１３ａをホット側給電点３に、直接、接続してもよい。 Furthermore, the hot-side third filament 13 may be configured by only the substantially horizontal filament 13a, and the substantially horizontal filament 13a may be directly connected to the hot-side feeding point 3.
　また、図６に示すように、ホット側第２線条１２と略平行なホット側第３線条１３の代わりに、ホット側第２線条１２と異なる方向に延伸するホット側第４線条１４によってホット側エレメント１０を構成してもよい。この場合、ホット側第４線条１４はホット側給電点３に、直接、接続される。 Further, as shown in FIG. 6, instead of the hot side third filament 13 that is substantially parallel to the hot side second filament 12, the hot side fourth filament that extends in a different direction from the hot side second filament 12. The hot side element 10 may be constituted by 14. In this case, the hot-side fourth wire 14 is directly connected to the hot-side feeding point 3.
　ホット側第４線条１４は、ホット側給電点３に接続される横向線条１４ｂと、横向線条１４ｂの先端に接続される下向線条１４ａによって構成される。下向線条１４ａは、アース側第３線条の上向線条２３と平行かつ近接して配置されることによって、上向線条２３と電気的に容量結合しており、ホット側第４線条１４とアース側第３線条の上向線条２３との間隔と、ホット側第４線条の長さを調整することによって、良好なアンテナ性能を得ることができる。例えば、ホット側第４線条の長さがα・λ／５０～α・λ／１０（λは受信帯域の中心周波数の波長）である場合に、良好なアンテナ性能を得ることができる。 The hot-side fourth wire 14 is composed of a horizontal wire 14b connected to the hot-side feeding point 3 and a downward wire 14a connected to the tip of the horizontal wire 14b. The downward wire 14a is electrically and capacitively coupled to the upward wire 23 by being arranged in parallel and close to the upward wire 23 of the ground side third wire, and the hot-side fourth wire 14a. By adjusting the distance between the line 14 and the upward line 23 of the ground side third line and the length of the hot side fourth line, good antenna performance can be obtained. For example, when the length of the hot-side fourth filament is α · λ / 50 to α · λ / 10 (λ is the wavelength of the center frequency of the reception band), good antenna performance can be obtained.
　また、本発明の実施形態のアンテナは、図１０に示すように、前部窓ガラスの左右対称位置に前部窓ガラスの中心線に対して線対称となるようにアンテナパターンを配置することで、ダイバーシティ受信をするアンテナを構成してもよい。 In addition, as shown in FIG. 10, the antenna of the embodiment of the present invention has an antenna pattern arranged in line symmetry with respect to the center line of the front window glass at the symmetrical position of the front window glass. An antenna that performs diversity reception may be configured.
　本実施形態のアンテナは、窓ガラス２の室内面側の所定位置に導電性のセラミックペーストによって、各線条の幅を０．７ｍｍで印刷し、乾燥後、加熱炉によって焼付けて形成されるが、他の絶縁体の面上にアンテナパターンを設けてもよい。また、建築物の窓ガラス、壁面、屋根に取り付けられるアンテナでもよい。さらに、車両の窓ガラス１の面にアンテナパターンを直接印刷して形成しても、窓ガラス１の所望の位置に貼り付けるための合成樹脂製のシートにアンテナパターンを形成したアンテナでもよい。 The antenna of the present embodiment is formed by printing a width of each filament at 0.7 mm with a conductive ceramic paste at a predetermined position on the indoor surface side of the window glass 2, drying, and baking by a heating furnace. An antenna pattern may be provided on the surface of another insulator. Moreover, the antenna attached to the window glass of a building, a wall surface, and a roof may be sufficient. Further, the antenna pattern may be formed by directly printing on the surface of the window glass 1 of the vehicle, or the antenna pattern may be formed on a synthetic resin sheet to be attached to a desired position of the window glass 1.
　さらに、図示しないチューナーから延伸した図示しない同軸ケーブルの芯線をホット側給電点３に、外被導体をアース側給電点４に接続している。 Furthermore, the core wire of a coaxial cable (not shown) extended from a tuner (not shown) is connected to the hot side feed point 3 and the outer conductor is connected to the ground side feed point 4.
　本実施形態のアンテナによれば、アンテナ性能を悪化させることなく、アンテナパターンを小さくできる。このため、前部窓ガラス周縁に形成される黒色セラミックス層でアンテナパターンの大部分を覆うことができ、目立たず、かつ視野の妨げにならないようにガラスアンテナを配設することができる。また、ガラスアンテナのパターンが簡潔なものとなったため、チューニングのための開発工数を削減することができる。 According to the antenna of the present embodiment, the antenna pattern can be reduced without deteriorating the antenna performance. For this reason, most of the antenna pattern can be covered with the black ceramic layer formed on the peripheral edge of the front window glass, and the glass antenna can be arranged so as not to stand out and disturb the visual field. Moreover, since the pattern of the glass antenna has become simple, the development man-hours for tuning can be reduced.
　以下本発明の種々の実施例について、説明する。 Hereinafter, various embodiments of the present invention will be described.
　＜実施例１＞
　図１は、本発明の実施例１のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 1>
FIG. 1 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 1 of the present invention.
　実施例１のアンテナは、前部窓ガラスの上側コーナー部に近接するように、ホット側給電点３とアース側給電点４とが上下に近接して設置され、ホット側給電点３には、ホット側エレメント１０が接続され、アース側給電点４には、アース側エレメント２０が接続されている。 In the antenna of Example 1, the hot-side feeding point 3 and the ground-side feeding point 4 are installed close to each other so as to be close to the upper corner portion of the front window glass. The hot element 10 is connected, and the earth element 20 is connected to the earth feeding point 4.
　ホット側エレメント１０は、ホット側給電点３に接続され、斜め上方に延伸するホット側第１線条１１と、ホット側第１線条１１の先端に接続し、ボディーフランジ１の上部と平行に延伸するホット側第２線条１２とから構成される。 The hot-side element 10 is connected to the hot-side power feeding point 3, is connected to the hot-side first filament 11 extending obliquely upward, the tip of the hot-side first filament 11, and parallel to the upper portion of the body flange 1. It is comprised from the hot side 2nd filament 12 to extend | stretch.
　アース側エレメント２０は、アース側第１線条２１、アース側第２線条の下向線条２２、アース側第３線条の上向線条２３およびアース側第２線条とアース側第３線条とで共有される接続線条２４とから構成される。 The ground-side element 20 includes a ground-side first wire 21, a ground-side second wire-down wire 22, an earth-side third wire-up wire 23, and a ground-side second wire and a ground-side wire. The connecting line 24 is shared by the three lines.
　アース側第１線条２１は、ボディーフランジ１の側部と平行に延伸し、該線条の一端がアース側給電点４に接続され、該アース側給電点４から下方向に延伸している線条である。 The ground-side first wire 21 extends in parallel with the side portion of the body flange 1, and one end of the wire is connected to the ground-side feeding point 4 and extends downward from the ground-side feeding point 4. It is a filament.
　アース側第２線条は、その一端がアース側給電点４に接続され、窓ガラス１の中心線方向に延びる接続線条２４と、接続線条２４の先端から下方向にアース側第１線条と平行に延伸する下向線条２２とから構成されるＬ字型の線条である。 One end of the ground-side second wire is connected to the ground-side feeding point 4, the connection wire 24 extending in the center line direction of the window glass 1, and the ground-side first wire downward from the tip of the connection wire 24. It is an L-shaped line composed of downward line 22 extending in parallel with the line.
　また、アース側第３線条は、接続線条２４と、接続線条２４の先端から上方向に延びる上向線条２３とから構成されるＬ字型の線条である。 The ground-side third filament is an L-shaped filament composed of a connection filament 24 and an upward filament 23 extending upward from the tip of the connection filament 24.
　図１に示すように、本実施例のアンテナの各線条の長さは、ホット側第１線条１１の長さが２０ｍｍ、ホット側第２線条１２の長さが５０ｍｍ、アース側第１線条２１の長さが１００ｍｍであり、接続線条２４の長さが５ｍｍ、アース側第２線条の下向線条２２の長さが８０ｍｍ、そしてアース側第３線条の上向線条２３の長さが４０ｍｍである。 As shown in FIG. 1, the length of each wire of the antenna of the present embodiment is such that the length of the hot side first wire 11 is 20 mm, the length of the hot side second wire 12 is 50 mm, and the ground side first The length of the line 21 is 100 mm, the length of the connecting line 24 is 5 mm, the length of the downward line 22 of the ground side second line 80 is 80 mm, and the upward line of the ground side third line The length of the strip 23 is 40 mm.
　また、ホット側第２線条１２とボディーフランジ１の上部との間隔は１５ｍｍであり、アース側第１線条２１とボディーフランジ１の側部との間隔は１５ｍｍである。 Further, the distance between the hot second wire 12 and the upper portion of the body flange 1 is 15 mm, and the distance between the ground first wire 21 and the side of the body flange 1 is 15 mm.
　また、ホット側給電点３およびアース側給電点４は、いずれも一辺が１０ｍｍの正方形のベタパターンとしており、それぞれの給電点に図示していない給電端子のホット側端子およびアース側端子を接続している。そしてホット側給電点３のボディーフランジ１に最も近い頂点とボディーフランジ１との間隔は６ｍｍ、ホット側給電点３とアース側給電点４との間隔は２０ｍｍとしている。 Each of the hot-side feeding point 3 and the ground-side feeding point 4 has a square solid pattern with a side of 10 mm, and a hot-side terminal and a ground-side terminal of a feeding terminal (not shown) are connected to each feeding point. ing. The distance between the apex closest to the body flange 1 of the hot-side feeding point 3 and the body flange 1 is 6 mm, and the distance between the hot-side feeding point 3 and the ground-side feeding point 4 is 20 mm.
　本実施例のガラスアンテナは、ガラスの波長短縮率αを０．７と考えて、各エレメントの寸法を地上デジタル放送の中心周波数近傍の周波数（６２０ＭＨｚ）に合うように調整したものであり、アンテナの寸法は、前述した寸法に限定されるものではない。 The glass antenna of this example is obtained by adjusting the size of each element so as to match the frequency (620 MHz) in the vicinity of the center frequency of terrestrial digital broadcasting, assuming that the wavelength shortening rate α of the glass is 0.7. The dimensions are not limited to the dimensions described above.
　本実施例のアンテナの性能は、図１２に示している実施例１のアンテナと後述する図９の比較例のアンテナとの周波数特性図の比較（実線：実施例１、破線：比較例）から理解することができる。図１２は、前部窓ガラス２に設けた実施例１のアンテナと比較例のアンテナとを車両に取り付けて測定した結果である。図１２から、実施例１のアンテナは、地上波デジタル放送の周波数帯域である４７０ＭＨｚ～７１０ＭＨｚのほぼ全ての周波数において、比較例のアンテナに比べて高い性能が得られていることがわかる。 The performance of the antenna of the present embodiment is based on a comparison of the frequency characteristic diagrams of the antenna of the first embodiment shown in FIG. 12 and the antenna of the comparative example of FIG. 9 described later (solid line: Example 1, broken line: comparative example). I can understand. FIG. 12 shows the results of measurement with the antenna of Example 1 and the antenna of the comparative example provided on the front window glass 2 attached to a vehicle. From FIG. 12, it can be seen that the antenna of Example 1 has higher performance than the antenna of the comparative example at almost all frequencies of 470 MHz to 710 MHz, which is the frequency band of terrestrial digital broadcasting.
　図１０は、フロントウィンドー２の上側コーナー部に実施例１のアンテナを二つ設けたものである。図１０に示すように、２系統のアンテナでダイバーシティ受信することによって、アンテナパターンを一つだけを設けた場合に比べて、高い受信性能を得ることができる。 FIG. 10 shows two antennas of Example 1 provided in the upper corner portion of the front window 2. As shown in FIG. 10, by performing diversity reception with two antennas, it is possible to obtain a higher reception performance than when only one antenna pattern is provided.
　＜実施例２＞
　図２は、本発明の実施例２のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 2>
FIG. 2 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 2 of the present invention.
　実施例２のアンテナは、アース側第２線条が設けられていない点において実施例１のアンテナと異なり、その他の点では実施例１のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of the second embodiment is different from the antenna of the first embodiment in that the second ground wire is not provided, and is the same as the antenna of the first embodiment in other points. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　＜実施例３＞
　図３は、本発明の実施例３のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 3>
FIG. 3 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 3 of the present invention.
　実施例３のアンテナは、接続線条２４の先端にアース側第３線条の上向線条２３が接続されており、接続線条２４の途中にアース側第２線条の下向線条２２が接続されている点で実施例１のアンテナと構成が異なる。すなわち、実施例３のアンテナは、アース側第２線条とアース側第３線条とが、接続線条２４の一部のみを共有している。 In the antenna according to the third embodiment, the upward line 23 of the ground side third line is connected to the tip of the connection line 24, and the downward line of the ground side second line is in the middle of the connection line 24. The configuration differs from the antenna of the first embodiment in that 22 is connected. That is, in the antenna of Example 3, the ground side second wire and the ground side third wire share only a part of the connection wire 24.
　実施例３のアンテナでは、アース側第３線条の上向線条２３の長さと接続線条２４の長さとを実施例１のアンテナから変化させることによって、良好なアンテナ性能を得ているが、その他の線条の長さは、実施例１のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 In the antenna of Example 3, good antenna performance is obtained by changing the length of the upward line 23 and the length of the connecting line 24 of the ground side third line from the antenna of Example 1. The other wire lengths are the same as those of the antenna of the first embodiment. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　＜実施例４＞
　図４は、本発明の実施例４のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 4>
FIG. 4 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 4 of the present invention.
　実施例４のアンテナは、ホット側第１線条とホット側第２線条との接続部に、さらにホット側第３線条１３を接続している点が、実施例２のアンテナと異なり、その他の点は実施例２のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of the fourth embodiment is different from the antenna of the second embodiment in that the hot side third wire 13 is further connected to the connecting portion between the hot side first wire and the hot side second wire, Other points are the same as those of the antenna of the second embodiment. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　ホット側第３線条１３は、ホット側第１線条とホット側第２線条との接続部から下方向に延伸される略垂直線条１３ｂと、略垂直線条１３ｂの先端に接続され窓ガラス１の中心線方向に延伸される略水平線条１３ａとから構成されている。 The hot-side third filament 13 is connected to the substantially vertical filament 13b extending downward from the connection portion between the hot-side first filament and the hot-side second filament, and to the tip of the approximately vertical filament 13b. It is comprised from the substantially horizontal filament 13a extended | stretched in the centerline direction of the window glass 1. As shown in FIG.
　本アンテナでは、ホット側第３線条１３の長さを４０ｍｍとしたときにインピーダンスが低くなり、良好なアンテナ性能が得られるが、ホット側第３線条１３とホット側第１線条１１およびホット側第２線条１２との接続位置によって、アンテナのインピーダンスが変化する。このため、良好なアンテナ性能が得られるように、ホット側第３線条１３の長さを調整するとよい。 In this antenna, when the length of the hot side third filament 13 is 40 mm, the impedance becomes low and good antenna performance is obtained. However, the hot side third filament 13 and the hot side first filament 11 and The antenna impedance varies depending on the connection position with the hot-side second filament 12. For this reason, it is good to adjust the length of the hot side 3rd filament 13 so that favorable antenna performance may be obtained.
　＜実施例５＞
　図５は、本発明の実施例５のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 5>
FIG. 5 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 5 of the present invention.
　実施例５のアンテナは、ホット側給電点３にホット側第３線条１３を接続し、アース側エレメント２０からアース側第３線条が設けられていない点が、実施例１のアンテナと異なり、その他の点で実施例１のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of the fifth embodiment is different from the antenna of the first embodiment in that the hot-side third wire 13 is connected to the hot-side feeding point 3 and the ground-side third wire is not provided from the ground-side element 20. The other points are the same as those of the antenna of the first embodiment. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　本実施例のアンテナでは、ホット側第３線条１３の長さを調整することによって、インピーダンスを調整でき、良好なアンテナ性能を得ることができる。 In the antenna of the present embodiment, the impedance can be adjusted by adjusting the length of the hot-side third filament 13, and good antenna performance can be obtained.
　＜実施例６＞
　図６は、本発明の実施例６のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 6>
FIG. 6 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 6 of the present invention.
　実施例６のアンテナは、ホット側第４線条１４を設けた点で、実施例２のアンテナと構成が異なり、その他の点で実施例２のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of Example 6 differs from the antenna of Example 2 in that the hot-side fourth filament 14 is provided, and is otherwise the same as the antenna of Example 2. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　ホット側第４線条１４は、ホット側給電点３に接続され、窓ガラス２の中心線方向に延伸される横向線条１４ｂと、横向線条１４ｂの先端に接続され、アース側第３線条の上向線条と平行に近接するように下方向に延伸された下向線条１４ａとから構成される。 The hot-side fourth wire 14 is connected to the hot-side feeding point 3 and connected to the horizontal wire 14b extending in the center line direction of the window glass 2 and the tip of the horizontal wire 14b, and the ground-side third wire It is comprised from the downward line 14a extended | stretched below so that it may approach in parallel with the upward line of a line.
　本実施例のアンテナでは、良好なアンテナ性能が得られるように、アース側第３線条の寸法を、実施例２から変化させ、調整しているが、その他の線条の長さは、実施例２のアンテナの線条と同一の長さとしている。 In the antenna of the present embodiment, the size of the ground side third filament is changed and adjusted from that of Example 2 so that good antenna performance can be obtained. The length is the same as that of the antenna line in Example 2.
　＜実施例７＞
　図７は、本発明の実施例７のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 7>
FIG. 7 is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile, showing an antenna pattern of Example 7 of the present invention.
　実施例７のアンテナは、ホット側第１線条１１とホット側第３線条１３を備えず、ホット側第２線条を直接、ホット側給電点３に接続している点が、実施例５のアンテナとは異なり、その他の点は実施例５のアンテナと同一である。このため、実施例５と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of Example 7 does not include the hot-side first filament 11 and the hot-side third filament 13, but the hot-side second filament is directly connected to the hot-side feeding point 3. Unlike the antenna 5, the other points are the same as those of the antenna of the fifth embodiment. For this reason, the same code | symbol is attached | subjected to the same structure as Example 5, and those description is abbreviate | omitted.
　図７に示すように、本実施例のアンテナの各線状の長さは、ホット側第２線条の長さが５０ｍｍ、アース側第１線条２１の長さが１１０ｍｍ、アース側第２線条の接続線条２４の長さが２０ｍｍ、アース側第２線条の下向線条２２の長さが８５ｍｍである。 As shown in FIG. 7, the lengths of the antennas of this embodiment are such that the length of the hot second wire is 50 mm, the length of the ground first wire 21 is 110 mm, and the ground side second wire. The length of the connecting wire 24 of the strip is 20 mm, and the length of the downward strip 22 of the ground-side second strip is 85 mm.
　また、ホット側第２線条１２とボディーフランジ１の上部との間隔は１５ｍｍであり、アース側第１線条２１とボディーフランジ１の側部との間隔は１５ｍｍである。 Further, the distance between the hot second wire 12 and the upper portion of the body flange 1 is 15 mm, and the distance between the ground first wire 21 and the side of the body flange 1 is 15 mm.
　また、ホット側給電点３およびアース側給電点４は、いずれも一辺が１０ｍｍの正方形のベタパターンとしており、それぞれの給電点に図示していない給電端子のホット側端子およびアース側端子を接続している。そしてホット側給電点３のボディーフランジ１に最も近い頂点とボディーフランジ１との間隔は６ｍｍ、ホット側給電点３とアース側給電点４との間隔は２０ｍｍとしている。 Each of the hot-side feeding point 3 and the ground-side feeding point 4 has a square solid pattern with a side of 10 mm, and a hot-side terminal and a ground-side terminal of a feeding terminal (not shown) are connected to each feeding point. ing. The distance between the apex closest to the body flange 1 of the hot-side feeding point 3 and the body flange 1 is 6 mm, and the distance between the hot-side feeding point 3 and the ground-side feeding point 4 is 20 mm.
　＜実施例８＞
　図８は、本発明の実施例８のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Example 8>
FIG. 8 shows an antenna pattern of Example 8 of the present invention, and is a front enlarged view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile.
　実施例８のアンテナは、接続線条２４が、アース側第２線条とアース側第３線条とに共用されていない点が、実施例１のアンテナとは異なり、その他の点は実施例１のアンテナと同一である。このため、実施例１と同じ構成には同じ符号を付し、それらの説明は省略する。 The antenna of the eighth embodiment is different from the antenna of the first embodiment in that the connecting wire 24 is not shared by the ground side second wire and the ground side third wire. 1 antenna. For this reason, the same code | symbol is attached | subjected to the same structure as Example 1, and those description is abbreviate | omitted.
　アース側エレメント２０は、アース側第１線条２１、アース側第２線条及びアース側第３線条とから構成される。アース側第２線条は、アース側給電点４に接続される接続線条２４と、接続線条２４の先端に接続される下向線条２２とから構成される。アース側第３線条は、アース側給電点４に接続される接続線条２５と、接続線条２５の先端に接続される上向線条２３とから構成される。 The earth side element 20 includes a ground side first filament 21, a ground side second filament, and a ground side third filament. The ground-side second wire is composed of a connecting wire 24 connected to the ground-side feeding point 4 and a downward wire 22 connected to the tip of the connecting wire 24. The ground side third wire is composed of a connecting wire 25 connected to the ground side feeding point 4 and an upward wire 23 connected to the tip of the connecting wire 25.
　なお、下向線条２２は接続線条２４の先端ではなく、接続線条２４の途中に接続されてもよい。さらに、上向線条２３は接続線条２５の先端ではなく、接続線条２５の途中に接続されてもよい。 In addition, the downward line 22 may be connected in the middle of the connection line 24 instead of the tip of the connection line 24. Furthermore, the upward line 23 may be connected in the middle of the connection line 25 instead of the tip of the connection line 25.
　本実施例のガラスアンテナは、ガラスの波長短縮率αを０．７と考えて、各エレメントの寸法を地上デジタル放送の中心周波数近傍の周波数（６２０ＭＨｚ）に合うように調整したものであり、アンテナの寸法は、前述した寸法に限定されるものではない。 The glass antenna of this example is obtained by adjusting the size of each element so as to match the frequency (620 MHz) in the vicinity of the center frequency of terrestrial digital broadcasting, assuming that the wavelength shortening rate α of the glass is 0.7. The dimensions are not limited to the dimensions described above.
　本実施例のアンテナの性能は、図１３に示している実施例７のアンテナと後述する図９の比較例のアンテナとの周波数特性図の比較（実線：実施例７、破線：比較例）から理解することができる。図１３は、前部窓ガラス２に設けた実施例１のアンテナと比較例のアンテナとを車両に取り付けて測定した結果である。図１３から、実施例１のアンテナは、地上波デジタル放送の周波数帯域である４７０ＭＨｚ～７１０ＭＨｚのほぼ全ての周波数において、比較例のアンテナに比べて高い性能が得られていることがわかる。 The performance of the antenna of this example is based on a comparison of the frequency characteristic diagrams of the antenna of Example 7 shown in FIG. 13 and the antenna of the comparative example of FIG. 9 described later (solid line: Example 7, broken line: comparative example). I can understand. FIG. 13 shows the results of measurement with the antenna of Example 1 and the antenna of the comparative example provided on the front window glass 2 attached to a vehicle. From FIG. 13, it can be seen that the antenna of Example 1 has higher performance than the antenna of the comparative example at almost all frequencies of 470 MHz to 710 MHz, which is the frequency band of terrestrial digital broadcasting.
　図１１は、前部窓ガラス２の上側コーナー部に実施例１のアンテナを二つ設けたものである。図１１に示すように、２系統のアンテナでダイバーシティ受信することによって、アンテナを一つだけを設けた場合に比べて、高い受信性能を得ることができる。 FIG. 11 shows two antennas of Example 1 provided in the upper corner portion of the front window glass 2. As shown in FIG. 11, by performing diversity reception with two antennas, it is possible to obtain higher reception performance than when only one antenna is provided.
　＜比較例＞
　図９は、本発明のアンテナと対比される比較例のアンテナパターンを示し、自動車の前部窓ガラスの上部コーナー部近傍に設けたガラスアンテナの正面拡大図である。 <Comparative example>
FIG. 9 shows an antenna pattern of a comparative example compared with the antenna of the present invention, and is an enlarged front view of a glass antenna provided in the vicinity of an upper corner portion of a front window glass of an automobile.
　比較例のアンテナは、特許文献２に記載のアンテナをベースにして、ガラスの波長短縮率αを０．７と考えて、各エレメントの長さを地上デジタル放送の中心周波数近傍の周波数（６２０ＭＨｚ）に合うように調整したアンテナパターンである。 The antenna of the comparative example is based on the antenna described in Patent Document 2, and the wavelength shortening rate α of the glass is assumed to be 0.7, and the length of each element is a frequency near the center frequency of terrestrial digital broadcasting (620 MHz). It is the antenna pattern adjusted to suit.
　本比較例のアンテナは、前部窓ガラスの上側コーナー部に近接するように、ホット側給電点３とアース側給電点４とが上下に近接して設置され、ホット側給電点３には、ホット側エレメント１０が接続され、アース側給電点４には、アース側エレメント２０が接続されている。 In the antenna of this comparative example, the hot-side feeding point 3 and the ground-side feeding point 4 are installed close to each other so as to be close to the upper corner portion of the front window glass. The hot element 10 is connected, and the earth element 20 is connected to the earth feeding point 4.
　ホット側エレメント１０は、ホット側給電点３に接続され、斜め上方に延伸するホット側第１線条１１と、ホット側第１線条１１の先端に接続し、ボディーフランジ１の上部と平行に延伸するホット側第２線条１２と、ホット側給電点３に接続され、下方に延びているホット側第５線条と、ホット側第５線条の先端と接続し、水平方向に延伸するホット側第６線条とから構成されている。 The hot-side element 10 is connected to the hot-side power feeding point 3, is connected to the hot-side first filament 11 extending obliquely upward, the tip of the hot-side first filament 11, and parallel to the upper portion of the body flange 1. Connected to the hot side second strip 12 to be stretched, the hot side fifth strip that is connected to the hot side feeding point 3 and extends downward, and the tip of the hot side fifth strip, and stretches in the horizontal direction. It is comprised from the hot side 6th filament.
　また、アース側エレメント２０は、アース側給電点４に接続され、ボディーフランジ１の側部に垂直に下方向に延びているアース側第１線条２１のみで構成されている。 Further, the earth side element 20 is connected to the earth side feeding point 4 and is constituted only by the earth side first wire 21 extending vertically downward to the side portion of the body flange 1.
　本発明の実施例のアンテナでは、アース側エレメントにインピーダンス調整用のアース側第２線条とアース側第３線条とのうちの少なくても１本が接続されているのに対して、比較例のアンテナには、アース側エレメントにインピーダンス調整用の線条が接続されていない点が異なっている。 In the antenna according to the embodiment of the present invention, at least one of the ground side second wire and the ground side third wire for adjusting the impedance is connected to the ground side element. The antenna of the example is different in that no impedance adjusting wire is connected to the ground side element.
　以上、本発明を添付の図面を参照して詳細に説明したが、本発明はこのような具体的構成に限定されるものではなく、添付した請求の範囲の趣旨内における様々な変更及び同等の構成を含むものである。 Although the present invention has been described in detail with reference to the accompanying drawings, the present invention is not limited to such specific configurations, and various modifications and equivalents within the spirit of the appended claims Includes configuration.
　本願は２０１０年１１月２５日に日本国特許庁に出願された特願２０１０－２６２４９１に基づく優先権を主張し、この出願の全ての内容は参照により本明細書に組み込まれる。 This application claims priority based on Japanese Patent Application No. 2010-262491 filed with the Japan Patent Office on November 25, 2010, the entire contents of which are incorporated herein by reference.

Claims (12)

  1. 　窓ガラスに設けられ、ホット側エレメントと、アース側エレメントとを備えるアンテナであって、
    　前記窓の開口部を構成する金属フランジの上側角部に近接する位置に、並んで配置されるように、ホット側給電点とアース側給電点とを備え、
    　前記ホット側エレメントは、前記ホット側給電点に接続され、
    　前記アース側エレメントは、前記アース側給電点に接続され、
    　前記ホット側エレメントは、前記ホット側給電点から離れる方向に前記金属フランジに沿って略水平に延伸し、
    　前記アース側エレメントは、アース側第１線条を有し、さらに、アース側第２線条とアース側第３線条との少なくとも一方を有し、
    　前記アース側第１線条は、前記アース側給電点に接続され、前記金属フランジに沿って下方に延伸し、
    　前記アース側第２線条は、前記アース側給電点に接続され、前記アース側第１線条よりも窓ガラスの中心側を、前記アース側第１線条と略平行に下方に延伸し、
    　前記アース側第３線条は、前記アース側給電点に接続され、前記アース側給電点および前記ホット側給電点より前記窓ガラスの中心側で、上方に延伸することを特徴とするアンテナ。     An antenna provided on a window glass, comprising a hot side element and a ground side element,
    A hot-side feeding point and a ground-side feeding point so as to be arranged side by side at a position close to the upper corner of the metal flange constituting the opening of the window;
    The hot side element is connected to the hot side feeding point,
    The earth side element is connected to the earth side feeding point,
    The hot side element extends substantially horizontally along the metal flange in a direction away from the hot side feeding point,
    The ground side element has a ground side first wire, and further has at least one of a ground side second wire and a ground side third wire,
    The ground side first filament is connected to the ground side feeding point and extends downward along the metal flange,
    The ground-side second filament is connected to the ground-side feeding point, and extends below the center side of the window glass substantially parallel to the ground-side first filament from the ground-side first filament,
    The ground-side third wire is connected to the ground-side feeding point and extends upward from the ground-side feeding point and the hot-side feeding point on the center side of the window glass.
  2. 　請求項１に記載のアンテナであって、
    　前記アース側第２線条は、前記アース側給電点に接続される接続線条と、前記接続線条の先端または途中に接続され、下方へ延伸する線条とによってＬ字形状に構成され、
    　前記アース側第３線条は、前記接続線条と、前記接続線条の先端または途中に接続され、上方に延伸する線条とによってＬ字形状に構成されることを特徴とするアンテナ。     The antenna according to claim 1,
    The ground side second wire is configured in an L shape by a connection wire connected to the ground side feeding point and a wire connected to the tip or the middle of the connection wire and extending downward,
    3. The antenna according to claim 1, wherein the ground-side third wire is configured in an L shape by the connection wire and a wire that is connected to the tip or the middle of the connection wire and extends upward.
  3. 　請求項１に記載のアンテナであって、
    　前記アース側第２線条は、前記アース側給電点に接続される第１接続線条と、前記第１接続線条の先端または途中に接続され、下方へ延伸する線条とによってＬ字形状に構成され、
    　前記アース側第３線条は、前記アース側給電点に接続される第２接続線条と、前記第２接続線条の先端または途中に接続され、上方に延伸する線条とによってＬ字形状に構成されることを特徴とするアンテナ。     The antenna according to claim 1,
    The ground-side second wire is L-shaped by a first connecting wire connected to the ground-side feeding point and a wire connected to the tip or the middle of the first connecting wire and extending downward. Composed of
    The ground-side third wire is L-shaped by a second connecting wire connected to the ground-side feeding point and a wire connected to the tip or the middle of the second connecting wire and extending upward. An antenna characterized by being configured as follows.
  4. 　請求項１に記載のアンテナであって、
    　前記ホット側給電点および前記アース側給電点のいずれもが、前記金属フランジから５ｍｍ以上離れた位置に配置されることを特徴とするアンテナ。     The antenna according to claim 1,
    Both of the hot-side feeding point and the ground-side feeding point are arranged at positions separated from the metal flange by 5 mm or more.
  5. 　請求項１に記載のアンテナであって、
    　前記ホット側エレメントは、
    　前記ホット側給電点に接続され、前記窓ガラスの中心線方向に延伸するホット側第１線条と、
    　前記ホット側第１線条の先端に接続され、前記ホット側給電点から離れる方向に前記金属フランジに沿って略水平に延伸するホット側第２線条と、を有し、
    　前記ホット側第１線条は、前記ホット側第１線条と前記金属フランジの上部との間隔が１０ｍｍから２５ｍｍである位置に配置されることを特徴とするアンテナ。     The antenna according to claim 1,
    The hot side element is
    A hot-side first filament connected to the hot-side feeding point and extending in the direction of the center line of the window glass;
    A hot-side second filament that is connected to the tip of the hot-side first filament and extends substantially horizontally along the metal flange in a direction away from the hot-side feeding point;
    The antenna according to claim 1, wherein the first hot wire is disposed at a position where a distance between the first hot wire and an upper portion of the metal flange is 10 mm to 25 mm.
  6. 　請求項５に記載のアンテナであって、
    　前記ホット側第１線条の長さと前記ホット側第２線条の長さとの合計は、αをガラスの波長短縮率とし、λを受信電波の中心周波数とした場合、α・λ／６～α・λ／２であることを特徴とするアンテナ。     The antenna according to claim 5, wherein
    The sum of the length of the hot side first filament and the length of the hot side second filament is defined as α · λ / 6˜, where α is the wavelength shortening rate of glass and λ is the center frequency of the received radio wave. An antenna characterized by α · λ / 2.
  7. 　請求項１に記載のアンテナであって、
    　前記アース側第１線条は、前記アース側第１線条と前記金属フランジの側部との間隔が１５ｍｍ以上である位置に配置されることを特徴とするアンテナ。     The antenna according to claim 1,
    The antenna is characterized in that the ground side first wire is disposed at a position where a distance between the ground side first wire and a side portion of the metal flange is 15 mm or more.
  8. 　請求項１に記載のアンテナであって、
    　前記ホット側エレメントは、ホット側第３線条を含み、
    　前記ホット側第３線条は、
    　前記ホット側給電点、前記ホット側第１線条または前記ホット側第２線条に接続され、前記ホット側給電点から離れる方向に延伸する略水平部分のみを有するか、または、
    　前記ホット側給電点、前記ホット側第１線条または前記ホット側第２線条に接続される略垂直部分と、前記略垂直部分の先端に接続され、前記ホット側給電点から離れる方向に延伸する略水平部分とを有することを特徴とするアンテナ。     The antenna according to claim 1,
    The hot side element includes a hot side third filament,
    The hot side third filament is
    Connected to the hot-side feeding point, the hot-side first filament or the hot-side second filament, and has only a substantially horizontal portion extending in a direction away from the hot-side feeding point, or
    Connected to the hot-side feeding point, the hot-side first filament or the hot-side second filament, a substantially vertical portion, and a tip of the substantially-vertical portion, extending in a direction away from the hot-side feeding point An antenna having a substantially horizontal portion.
  9. 　請求項８に記載のアンテナであって、
    　前記ホット側第３線条の長さは、αをガラスの波長短縮率とし、λを受信電波の中心周波数とした場合、α・λ／６以下であることを特徴とするアンテナ。     The antenna according to claim 8, wherein
    The length of the third hot wire is α · λ / 6 or less, where α is the glass wavelength shortening rate and λ is the center frequency of the received radio wave.
  10. 　請求項１に記載のアンテナであって、
    　前記ホット側エレメントは、ホット側第４線条を含み、
    　前記ホット側第４線条は、前記ホット側給電点に接続し、前記アース側第３線条と近接して配置されることを特徴とするアンテナ。     The antenna according to claim 1,
    The hot side element includes a hot side fourth filament,
    The hot side fourth wire is connected to the hot side feeding point, and is arranged close to the ground side third wire.
  11. 　請求項１０に記載のアンテナであって、
    　前記ホット側第４線条の長さは、αをガラスの波長短縮率とし、λを受信電波の中心周波数とした場合、α・λ／５０～α・λ／１０であることを特徴とするアンテナ。     The antenna according to claim 10, wherein
    The length of the hot side fourth filament is α · λ / 50 to α · λ / 10, where α is the wavelength shortening rate of the glass and λ is the center frequency of the received radio wave. antenna.
  12. 　請求項１に記載のアンテナであって、
    　αをガラスの波長短縮率とし、λを受信電波の中心周波数とした場合、
    　前記アース側第１線条の長さは、α・λ／４～α・λ／２であり、
    　前記アース側第２線条の長さは、α・λ／２０～α・λ／２であり、
    　前記アース側第３線条の長さは、α・λ／２０～α・λ／５であり、
    　前記アース側第１線条と前記アース側第２線条との間隔は、α・λ／５０～α・λ／１０であり、
    　前記アース側第３線条と前記ホット側給電点との間の、前記アース側第３線条に対する鉛直方向の間隔は、α・λ／５０～α・λ／１０であることを特徴とするアンテナ。     The antenna according to claim 1,
    When α is the wavelength reduction rate of glass and λ is the center frequency of the received radio wave,
    The length of the ground-side first filament is α · λ / 4 to α · λ / 2,
    The length of the ground-side second filament is α · λ / 20 to α · λ / 2,
    The length of the ground side third filament is α · λ / 20 to α · λ / 5,
    The distance between the ground side first wire and the ground side second wire is α · λ / 50 to α · λ / 10,
    A vertical distance between the ground-side third wire and the hot-side feeding point with respect to the ground-side third wire is α · λ / 50 to α · λ / 10. antenna.
PCT/JP2011/071582 2010-11-25 2011-09-22 Antenna WO2012070303A1 (en)

Priority Applications (2)

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EP11843713.6A EP2645473A1 (en) 2010-11-25 2011-09-22 Antenna
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JP6251476B2 (en) * 2012-12-20 2017-12-20 セントラル硝子株式会社 Glass antenna for vehicles
JP6507713B2 (en) * 2014-03-26 2019-05-08 セントラル硝子株式会社 Glass antenna for car
US10804590B2 (en) * 2017-04-12 2020-10-13 Central Glass Company, Limited Antenna and window glass
KR102595492B1 (en) * 2018-09-03 2023-10-30 쌩-고벵 글래스 프랑스 Vehicle window with transponder
WO2020193384A1 (en) 2019-03-22 2020-10-01 Saint-Gobain Glass France Vehicle pane

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JP2009033687A (en) 2007-07-31 2009-02-12 Central Glass Co Ltd Glass antenna for vehicle
JP2009164678A (en) 2007-12-28 2009-07-23 Central Glass Co Ltd Glass antenna for vehicle

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US4608570A (en) * 1982-11-18 1986-08-26 Central Glass Company, Limited Automotive window glass antenna
US4803492A (en) * 1985-11-25 1989-02-07 Central Glass Company, Limited Vehicle window glass antenna
GB2193846B (en) * 1986-07-04 1990-04-18 Central Glass Co Ltd Vehicle window glass antenna using transparent conductive film
JP2003101318A (en) * 2001-09-26 2003-04-04 Asahi Glass Co Ltd Windshield antenna for automobile
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JP2009033687A (en) 2007-07-31 2009-02-12 Central Glass Co Ltd Glass antenna for vehicle
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EP2645473A1 (en) 2013-10-02

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