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WO2025150495A1 - Verre à vitre de véhicule - Google Patents

Verre à vitre de véhicule

Info

Publication number
WO2025150495A1
WO2025150495A1 PCT/JP2025/000238 JP2025000238W WO2025150495A1 WO 2025150495 A1 WO2025150495 A1 WO 2025150495A1 JP 2025000238 W JP2025000238 W JP 2025000238W WO 2025150495 A1 WO2025150495 A1 WO 2025150495A1
Authority
WO
WIPO (PCT)
Prior art keywords
glass
vehicle
conductive film
windshield
decoating
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.)
Pending
Application number
PCT/JP2025/000238
Other languages
English (en)
Japanese (ja)
Inventor
圭祐 新井
文範 渡辺
英明 東海林
淳 信岡
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AGC Inc
Original Assignee
Asahi Glass Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asahi Glass Co Ltd filed Critical Asahi Glass Co Ltd
Publication of WO2025150495A1 publication Critical patent/WO2025150495A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J1/00—Windows; Windscreens; Accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • 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
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures

Definitions

  • This disclosure relates to vehicle window glass.
  • Patent Document 1 discloses a vehicle window glass having a transparent conductive film formed over substantially the entire surface. A film cutout is formed in a part of the transparent conductive film. An antenna receives radio waves that pass through the film cutout.
  • the vehicle window glass includes: A vehicle window glass that is attached to an opening of a vehicle having an antenna mounted therein,
  • the vehicle window glass is at least one of a windshield and a rear glass, At least one of the windshield and the rear glass includes a first glass plate covered with a first conductive film; the first glass plate includes a decoated region in which the first conductive film is removed from at least a portion of the first conductive film;
  • the height H of the decoating region is equal to or greater than the sum of the height OH of the aperture surface of the antenna and the wavelength ⁇ 0 of the electromagnetic wave passing through the decoating region,
  • the width W of the decoating region is 2.5 times or more the wavelength ⁇ 0 of the electromagnetic wave passing through the decoating region.
  • FIG. 1 is a schematic diagram showing one configuration example of a vehicle window glass according to an embodiment
  • FIG. 2 is a front view showing one configuration example of a windshield according to an embodiment
  • 3 is a schematic diagram showing a cross section of one configuration example of a vehicle window glass taken along line III-III shown in FIG. 1.
  • FIG. 3 is a schematic diagram showing a cross section of a first modified example of a windshield and a rear glass taken along line III-III.
  • FIG. 3 is a schematic diagram showing a cross section of a second modified example of the windshield and rear glass taken along the line III-III.
  • FIG. 3 is a schematic diagram showing a cross section of a third modified example of the windshield and rear glass taken along the line III-III.
  • FIG. 7 is a schematic diagram showing a cross section of an example of a configuration of a right side window and a left side window taken along line VII-VII.
  • FIG. FIG. 13 is a front view showing a modified example of the windshield according to the embodiment.
  • 1 is a schematic diagram illustrating an example of a frequency selective surface according to an embodiment
  • 1 is a schematic diagram showing a first example of a unit area of a frequency selective surface according to an embodiment
  • FIG. 2 is a schematic diagram showing a modified example of the first example of a unit area of a frequency selective surface according to an embodiment.
  • FIG. 13 is a schematic diagram showing another modified example of the first example of the unit area of the frequency selective surface according to the embodiment.
  • 13 is a diagram showing the angular range of the calculated average gain.
  • 13 is a graph showing an average gain AG versus a standard value W/ ⁇ 0 according to Example 6.
  • 13 is a graph showing an average gain AG versus a standard value W/ ⁇ 0 according to Example 7.
  • 13 is a graph showing a width P1 versus a distance G1 according to Example 8.
  • 13 is a graph showing a width P1 versus a distance G1 according to Example 8.
  • 13 is a graph showing a width P1 versus a distance G1 according to Example 9.
  • 13 is a graph showing a width P1 versus a distance G1 according to Example 9.
  • 13 is a graph showing width P2 versus line width W2 in Example 10.
  • FIG. 1 is a schematic diagram showing an example of the configuration of a vehicle window glass according to an embodiment.
  • Figure 2 is a front view showing an example of the configuration of a windshield according to an embodiment.
  • Figure 3 is a schematic diagram showing a cross section of the example of the configuration of a vehicle window glass taken along the cutting line III-III shown in Figure 1.
  • the three-dimensional coordinates shown in FIG. 1 and other drawings are merely for the sake of convenience in explaining the positional relationships of the components.
  • the positive direction of the UP axis is above the vehicle MM
  • the positive direction of the FR axis is in front of the vehicle MM
  • the positive direction of the LH axis is to the left of the vehicle MM, and this is common between all drawings.
  • the FR axis extends in the fore-and-aft direction of the vehicle MM
  • the LH axis extends in the width direction of the vehicle MM.
  • the vehicle window glass 10 comprises a windshield 1 and a rear glass 2.
  • the windshield 1 is attached to a front opening of the vehicle MM.
  • the rear glass 2 is attached to a rear opening of the vehicle MM.
  • At least one of the windshield 1 and the rear glass 2 comprises a glass plate covered with a conductive film.
  • the glass plate comprises a decoated area in at least a portion of the conductive film where the conductive film has been removed.
  • the glass plate 61 is disposed on the inside IS side of the glass plate 63.
  • the thickness of the glass plate 63 is preferably 1.0 mm or more and 3.0 mm or less. When the thickness of the glass plate 63 is 1.0 mm or more, the strength of the stone chipping resistance performance is sufficient, and when it is 3.0 mm or less, the mass of the laminated glass 60 does not become too large, which is preferable in terms of fuel efficiency of the vehicle MM.
  • the thickness of the glass plate 61 is preferably 0.3 mm or more and 2.3 mm or less. When the thickness of the glass plate 61 is 0.3 mm or more, the handling property is good, and when it is 2.3 mm or less, the mass does not become too large.
  • the laminated glass 60 can be both lightweight and soundproof, which is preferable.
  • the glass plate 61 may be chemically strengthened glass.
  • the compressive stress value of the glass surface is 300 MPa or more, and the depth of the compressive stress layer is 2 ⁇ m or more.
  • the laminated glass 60 further includes an intermediate film 62 (also referred to as a first intermediate film). The glass plate 61 and the glass plate 63 may be bonded together via an intermediate film 62.
  • the height H of the decoating area 6B is preferably equal to or greater than the height OH of the opening of the antenna A1.
  • the height H of the decoating area 6B is preferably equal to or less than 16 times the wavelength ⁇ 0 of the electromagnetic wave passing through the decoating area 6B, preferably equal to or less than 10.7 times, and more preferably equal to or less than 8 times.
  • the width P1 is also referred to as a decoating period.
  • the conductor portions U1c in adjacent first unit areas U1 are spaced apart by a distance G1.
  • the distance G1 is also referred to as a decoating width.
  • the radio wave permeability of the frequency selective surface consisting of a plurality of first unit regions U1 may be ensured.
  • a and b are determined according to a predetermined frequency band of electromagnetic waves that the frequency selective surface transmits, and can be obtained by calculation or experiment.
  • the first unit region U1 can be formed by cutting out a portion having the same shape as the slot portion U1s from the conductive film 7, that is, from all conductor parts.
  • the conductor portion U11c has the same configuration as the conductor portion U1c, except for its shape.
  • the conductor portion U11c is substantially hexagonal.
  • the slot portion U11s has the same configuration as the slot portion U1s, except for its shape.
  • the slot portion U11s extends in a frame shape surrounding the conductor portion U11c.
  • conductor sections U2c to U8c which will be described later, have the same configuration as conductor section U1c, except for their shapes.
  • slot sections U2s to U8s which will be described later, have the same configuration as slot section U1s, except for their shapes.
  • the second unit area U2 shown in FIG. 11 is a grid type.
  • the second unit area U2 includes a conductor portion U2c and a slot portion U2s.
  • the conductor portion U2c and the slot portion U2s of the second unit area U2 have the same configuration as the conductor portion U1c and the slot portion U1s of the first unit area U1 that are inverted.
  • the slot portion U2s is square.
  • the conductor portion U2c extends in a frame shape so as to surround the slot portion U2s.
  • the second unit area U2 has a width P2.
  • the conductor portions U2c in the adjacent second unit areas U2 have a line width W2.
  • the radio wave permeability of the frequency selective surface consisting of a plurality of second unit areas U2 may be ensured.
  • a and b are determined according to a predetermined frequency band that the frequency selective surface transmits, and can be obtained by calculation or experiment.
  • the third unit area U3 shown in FIG. 12 is a loop slot type.
  • the third unit area U3 includes a first conductor portion U3ca, a second conductor portion U3cb, and a slot portion U3s.
  • the first conductor portion U3ca is a square having a side length L3.
  • the slot portion U3s extends in a frame shape surrounding the first conductor portion U3ca.
  • the slot portion U3s has a width W3.
  • the second conductor portion U3cb extends in a frame shape surrounding the slot portion U3s.
  • the unit area U4 shown in FIG. 13 is a loop type.
  • the fourth unit area U4 includes a conductor U4c, a first slot U4sa, and a second slot U4sb.
  • the conductor U4c and slot U4s of the fourth unit area U4 have the same configuration as the conductor U3c and slot U3s of the third unit area U3 shown in FIG. 12, which are inverted.
  • the first slot U4sa is a square shape with a side length L4.
  • the conductor U4c extends in a frame shape surrounding the first slot U4sa.
  • the conductor U4c has a width W4.
  • the second slot U4sb extends in a frame shape surrounding the conductor U4c.
  • the eighth unit area U8 shown in FIG. 17 is a Jerusalem cross slot type.
  • the eighth unit area U8 includes a conductor portion U8c and a slot portion U8s.
  • the conductor portion U8c and the slot portion U8s of the eighth unit area U8 have the same configuration as the conductor portion U6c and the slot portion U6s of the sixth unit area U6 shown in FIG. 15, which are inverted.
  • the conductor portion U8c extends in a Jerusalem cross shape.
  • the conductor portion U8c includes a main body U8ca and four straight portions U8cb.
  • the main body U8ca extends in a cross shape with two straight portions crossed.
  • the conductor portion U8c has a width W8.
  • the strength of the radio waves from antenna A2 is often low, below -10 dBi.
  • the glass plate of the rear window is not covered with a conductive film at all, that is, when the entire surface of the glass plate of the rear window is a decoated area, the strength of the radio waves from antenna A2 can be maintained.
  • the vehicle window glass according to Example 6 has the same configuration as Example 5, except that it includes the windshield 11 shown in FIG. 2.
  • a width W of a predetermined range of the decoating area 6B in Example 6 the directivity in an example horizontal plane (here, a plane including the FR axis and the LH axis) corresponding to the antenna A1 was measured. In this measurement, an electromagnetic wave with a frequency of 5.9 GHz and a wavelength ⁇ 0 of 50.8 mm was used.
  • the height H of the decoating area 6B according to Example 6 is the height OH of the aperture surface of the antenna A1.
  • the decoating area 6B according to Example 6 does not have a frequency selective surface.
  • the average gain AG was calculated for each directional angle range of -90° to -45°, -45° to 45°, and 45° to 90°, and the results are shown in Figure 26.
  • the values obtained by subtracting 3 dBi from the average gain AG for -45° to 45° and 45° to 90° are also shown in Figure 26.
  • the average gain AG increases as the standard value W/ ⁇ 0 of the sixth embodiment increases.
  • the average gain AG when the width W is 10 times the wavelength ⁇ 0 is not much different from the average gain AG of the reference example, and is equal to or greater than the value obtained by subtracting 3 dBi from the average gain AG of the reference example.
  • the average gain AG of the reference example is equal to or greater than the value obtained by subtracting 3 dBi from the average gain AG of the reference example, sufficient radio wave transparency can be ensured. Therefore, when the width W is 10 times the wavelength ⁇ 0 or more, the average gain AG is good. As a result, when the height H of the decoating region 6B is equal to or greater than the height OH of the aperture surface of the antenna A1, if the width W is 10 times the wavelength ⁇ 0 or more, sufficient radio wave transparency can be ensured, and the example corresponding to the antenna A1 can obtain sufficient gain.
  • the vehicle window glass according to Example 7 has the same configuration as Example 5, except that it includes the windshield 31 shown in FIG. 8.
  • the directivity in the horizontal plane here, the plane including the FR axis and the LH axis
  • the decoating area 16B is not provided with a frequency selective surface.
  • the average gain AG in the directivity angle ranges of ⁇ 90° to ⁇ 45°, ⁇ 45° to 45°, and 45° to 90° shown in FIG. 25 was calculated for the result of the measured directivity.
  • the calculated result is shown in FIG. 27. Note that, when the standard value W/ ⁇ 0 is a maximum value of about 25, the width W is the same as the overall width of the windshield 11.
  • the decoating area 6B extends from one end to the other end of the windshield 11 in the LH axis direction.
  • the vehicle window glass according to Example 13 has the same configuration as Example 5, except that it is provided with the windshield 31 shown in FIG. 8.
  • the directivity in the horizontal plane (here, the plane including the FR axis and the LH axis) of the example corresponding to the antenna A1 was measured.
  • an electromagnetic wave with a frequency of 5.9 GHz and a wavelength ⁇ 0 of 50.8 mm was used.
  • the width W of the decoating area 16B according to Example 13 is 813 mm, which is approximately the same value as 16 ⁇ 0.
  • the decoating area 16B according to Example 13 does not have a frequency selective surface.
  • the average gain AG in the directivity angle ranges of ⁇ 90° to ⁇ 45°, ⁇ 45° to 45°, and 45° to 90° shown in FIG. 25 was calculated for the measured directivity results.
  • the calculated results are shown in FIG. 33.
  • the standard value (H-OH)/ ⁇ 0 is 0 (zero)
  • the height H of the decoating area 16B is the same as the height OH of the aperture of the antenna A1.
  • the standard value (H-OH)/ ⁇ 0 is 1, the height H of the decoating area 16B is the same as the sum of the height OH of the aperture of the antenna A1 and the wavelength ⁇ 0 of the electromagnetic wave.
  • the average gain AG was calculated for each directional angle range of -90° to -45°, -45° to 45°, and 45° to 90°, and the results are shown in Figure 33.
  • the values obtained by subtracting 3 dBi from the average gain AG for -90° to -45° and 45° to 90° are also shown in Figure 33.
  • the vehicle window glass of Examples 8 and 9 has the same configuration as the windshield 11 shown in Figures 2 and 3.
  • the decoating area 6B of Example 8 has a frequency selection surface consisting of a plurality of first unit areas U1 shown in Figure 10A.
  • the decoating area 6B of Example 9 has a frequency selection surface consisting of a plurality of second unit areas U2 shown in Figure 11.
  • TM waves as electromagnetic waves are incident on the decoating area 6B of Examples 8 and 9 from a direction inclined at 65° or 70° from the FR axis toward the negative direction of the LH axis. In other words, the incident angle of the TM waves is 65° or 70°.
  • the vehicle window glass of Examples 11 and 12 also had their radio wave transmittance determined by electromagnetic field simulation, as in the vehicle window glass of Example 8.
  • the electromagnetic transmittance determined for Examples 11 and 12 was similar to the results shown in Figures 28A and 28B.
  • the vehicle window glass of Example 11 has the same configuration as the vehicle window glass of Example 8, except that the decoating area 6B has a frequency selection surface consisting of a plurality of first unit areas U1a shown in Figure 10B.
  • the vehicle window glass of Example 12 has the same configuration as the vehicle window glass of Example 8, except that the decoating area 6B has a frequency selection surface consisting of a plurality of first unit areas U1b shown in Figure 10C.
  • the width P1 and the distance G1 satisfy P1 ⁇ 5.84 ⁇ G1 0.20 .
  • the width P1 and the distance G1 satisfy P1 ⁇ 3.31 ⁇ G1 0.23 .
  • the width P1 and the distance G1 satisfy P1 ⁇ 2.10 ⁇ G1 0.25 .
  • the width P1 and the distance G1 satisfy P1 ⁇ 1.51 ⁇ G1 0.30 .
  • good radio wave transmittance can be ensured in each frequency band.
  • Example 8 when the incidence angle of the TM wave is 70°, the frequency band of the TM wave is 5.9 GHz, and the radio wave transmittance is -3 dB or more, if the width P1 and the distance G1 satisfy P1 ⁇ 6.79 ⁇ G1 0.19 , good radio wave transmittance can be ensured. Also, when the frequency band of the TM wave is 5.9 GHz, and the radio wave transmittance is -1 dB or more, if the width P1 and the distance G1 satisfy P1 ⁇ 4.69 ⁇ G1 0.22 , good radio wave transmittance can be ensured.
  • the width P2 and the line width W2 satisfy P2 ⁇ 8.91 ⁇ W2 0.32 .
  • the width P2 and the line width W2 satisfy P2 ⁇ 9.89 ⁇ W2 0.07 .
  • the width P2 and the line width W2 satisfy P2 ⁇ 2.24 ⁇ W2 0.15 .
  • Example 10 when the TM wave incidence angle is 70°, the TM wave frequency band is 5.9 GHz, and the radio wave transmittance is -3 dB or more, if the width P1 and the distance G1 satisfy P1 ⁇ 7.38 ⁇ G1 0.17 , good radio wave transmittance can be ensured. Also, when the TM wave frequency band is 5.9 GHz and the radio wave transmittance is -1 dB or more, if the width P1 and the distance G1 satisfy P1 ⁇ 4.90 ⁇ G1 0.21 , good radio wave transmittance can be ensured.
  • the TM wave frequency band is 28 GHz and the radio wave transmittance is -3 dB or more
  • the width P1 and the distance G1 satisfy P1 ⁇ 2.53 ⁇ G1 0.23
  • good radio wave transmittance can be ensured.
  • the width P1 and the distance G1 satisfy the relationship P1 ⁇ 1.69 ⁇ G1 0.27 .
  • good radio wave transmittance can be ensured in each frequency band by the width P1 and the distance G1 satisfying a specific relationship.
  • the width P1 and the distance G1 may satisfy P1 ⁇ 7.38 ⁇ G1 0.17 , and preferably P1 ⁇ 6.80 ⁇ G1 0.20 .
  • the width P1 and the distance G1 satisfy such a relationship, a good radio wave transmittance can be secured at each incidence angle of the TM wave.
  • the present invention is not limited to the above-described embodiment, and can be modified as appropriate without departing from the spirit of the invention.
  • the present invention may also be implemented by combining the above-described embodiment or examples thereof as appropriate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Details Of Aerials (AREA)

Abstract

La présente invention concerne un verre à vitre de véhicule qui permet d'obtenir un gain d'antenne suffisant tout en supprimant une augmentation de la zone d'une région dont le revêtement a été retiré. Le verre à vitre de véhicule (10) selon la présente divulgation est fixé à une ouverture d'un véhicule qui a une antenne montée dans sa cabine. Le verre à vitre de véhicule (10) est au moins l'un parmi un pare-brise (1) et un verre arrière (2). Au moins l'un parmi le pare-brise (1) et le verre arrière (2) est pourvu d'un premier corps de plaque de verre (6) qui est recouvert d'un premier film conducteur (7). Le premier corps de plaque de verre (6) est pourvu d'une région dont le revêtement a été retiré (6B) où au moins une partie du premier film conducteur (7) a été retirée.
PCT/JP2025/000238 2024-01-12 2025-01-07 Verre à vitre de véhicule Pending WO2025150495A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024003391 2024-01-12
JP2024-003391 2024-01-12

Publications (1)

Publication Number Publication Date
WO2025150495A1 true WO2025150495A1 (fr) 2025-07-17

Family

ID=96386979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2025/000238 Pending WO2025150495A1 (fr) 2024-01-12 2025-01-07 Verre à vitre de véhicule

Country Status (1)

Country Link
WO (1) WO2025150495A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6900763B2 (en) * 2002-07-11 2005-05-31 Harris Corporation Antenna system with spatial filtering surface
JP2016506308A (ja) * 2012-10-15 2016-03-03 サン−ゴバン グラス フランスＳａｉｎｔ−Ｇｏｂａｉｎ Ｇｌａｓｓ Ｆｒａｎｃｅ 高周波透過性を有したパネル
US20220177363A1 (en) * 2019-04-30 2022-06-09 Agc Glass Europe Glazing unit with frequency selective coating and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6900763B2 (en) * 2002-07-11 2005-05-31 Harris Corporation Antenna system with spatial filtering surface
JP2016506308A (ja) * 2012-10-15 2016-03-03 サン−ゴバン グラス フランスＳａｉｎｔ−Ｇｏｂａｉｎ Ｇｌａｓｓ Ｆｒａｎｃｅ 高周波透過性を有したパネル
US20220177363A1 (en) * 2019-04-30 2022-06-09 Agc Glass Europe Glazing unit with frequency selective coating and method

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