DE102021005871A1 - WINDOW GLASS DEVICE FOR A VEHICLE - Google Patents

Abstract

The present invention relates to a window glass device for a vehicle, which satisfies at least one of the following formulas: (λ/4−λ/8)×(2×N1−1)×k≤D1≤(λ/4+λ/8 )×(2×N1−1)×k; and(λ/4−λ/8)×(2×N2−1)×k≤D2≤(λ/4+λ/8)×(2×N2− 1)×kwhereX is an air wavelength of electromagnetic waves in a prescribed frequency range to be received by the antenna element; no wavelength shortening ratio of the glass plate is in the prescribed frequency range; N1 is an integer of 1 or greater; N2 is an integer of 1 or greater;D1 is a length of a first path extending from the feeding portion to a first high-frequency terminal disposed on the power supply side along at least part of the first bus bar; andD2 is a length of a second path, which is different from the first path and extends from the feeding section to a second high-frequency terminal located on the power supply side along a path in the direction from the top to the bottom of the heating region and at least a part of the second Busbar is arranged.

Description

TECHNICAL AREA

The present invention relates to a window glass device for a vehicle.

STATE OF THE ART

• Patentdokument 1: WO 2016/185898
• Patentdokument 2: WO 2016/096432

There is known a windowpane for a vehicle which is provided with a conductive member for heating a glass plate when a voltage is applied between a pair of bus bars for the purpose of anti-fogging or defrosting. and an antenna arranged in the vicinity of a heating region where the conductive material is provided (see Patent Documents 1 and 2).

• Patent Document 1: WO 2016/185898
• Patent Document 2: WO 2016/096432

SUMMARY OF THE INVENTION

However, in a window glass having a heating region where a conductive material for anti-fogging or the like is provided, the region where an antenna element is arranged may be so narrow that the degrees of freedom in determining of design items such as a position and a shape of the antenna element are decreased depending on, for example, the size of the heating region. In this case, it is difficult to allow an antenna element capable of securing a necessary antenna gain in a prescribed frequency range to coexist with the heating region.

The present invention provides a window glass device for a vehicle, which allows an antenna element capable of securing a necessary antenna gain in a prescribed frequency range to coexist with a heating region.

• eine Glasplatte;
• eine erste Sammelschiene, welche auf der Glasplatte ausgebildet ist und einen oberen Abschnitt umfasst, welcher sich in einer derartigen Richtung erstreckt, um sich entlang einer oberen Kante bzw. eines oberen Rands der Glasplatte zu erstrecken;
• eine zweite Sammelschiene, welche auf der Glasplatte ausgebildet ist und einen Bodenabschnitt umfasst, welcher sich in einer derartigen Richtung erstreckt, um sich entlang eines Bodenrands der Glasplatte zu erstrecken; und
• ein Antennenelement, welches auf der Glasplatte ausgebildet ist und einen Speise- bzw. Zufuhrabschnitt umfasst, welcher nahe zu der ersten Sammelschiene angeordnet ist,
• wobei:
  • die Glasplatte eine Heizregion umfasst, welche sich zwischen dem oberen Abschnitt der ersten Sammelschiene und dem Bodenabschnitt der zweiten Sammelschiene erstreckt;
  • die Heizregion eine Region ist, wo ein leitendes bzw. leitfähiges Glied bzw. Element angeordnet ist, durch welches ein Gleichstrom in einer Richtung von der Oberseite zum Boden fließt, wenn eine Gleichspannung zwischen der ersten Sammelschiene und der zweiten Sammelschiene von einer Stromversorgung geliefert wird, und sich die Heizregion erwärmt, wenn das leitende Glied Wärme erzeugt; und
  • wenigstens eine der Formeln: $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}8\right)\times \left(2\times {\text{N}}_1-1\right)\times \text{k}\le {\text{D}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}8\right)\times (2\\ \times {\text{N}}_1-1)\times \text{k};\end{array}$$
    
    und $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}8\right)\times \left(2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1\right)\times \text{k}\le {\text{D}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}8\right)\times (2\\ \times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1)\times \text{k}\end{array}$$
    
    erfüllt ist, wobei
  • λ eine Wellenlänge in der Luft von elektromagnetischen Wellen in einem vorgeschriebenen bzw. vorbestimmten Frequenzbereich ist, welcher durch das Antennenelement zu empfangen ist;
  • k ein Wellenlängen-Verkürzungsverhältnis der Glasplatte in dem vorgeschriebenen Frequenzbereich ist;
  • N₁ eine ganze Zahl von 1 oder größer ist;
  • N₂ eine ganze Zahl von 1 oder größer ist;
  • D₁ eine Länge eines ersten Pfads bzw. Wegs ist, welcher sich von dem Zufuhrabschnitt zu einem ersten Hochfrequenzanschluss erstreckt, welcher auf der Seite der Stromversorgung entlang wenigstens eines Teils der ersten Sammelschiene angeordnet ist; und
  • D₂ eine Länge eines zweiten Pfads ist, welcher verschieden von dem ersten Pfad ist und sich von dem Zufuhrabschnitt zu einem zweiten Hochfrequenzanschluss erstreckt, welcher auf der Seite der Stromversorgung entlang eines Pfads in der Richtung von der Oberseite zum Boden der Heizregion und wenigstens eines Teils der zweiten Sammelschiene angeordnet ist.

The present invention provides a window glass device for a vehicle, comprising:

• a glass plate;
• a first bus bar formed on the glass panel and including an upper portion extending in such a direction as to extend along an upper edge of the glass panel;
• a second bus bar formed on the glass panel and including a bottom portion extending in such a direction as to extend along a bottom edge of the glass panel; and
• an antenna element formed on the glass plate and including a feeding portion located close to the first bus bar,
• whereby:
  • the glass plate includes a heating region extending between the top portion of the first bus bar and the bottom portion of the second bus bar;
  • the heating region is a region where a conductive member through which a direct current flows in a direction from top to bottom when a direct current voltage is supplied between the first bus bar and the second bus bar from a power supply is arranged, and the heating region heats up when the conductive member generates heat; and
  • at least one of the formulas: $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1\right)\times \text{k}\le {\text{<figure-callout id="1" label="D" filenames="DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1)\times \text{k};\end{array}$$
    
    and $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1\right)\times \text{k}\le {\text{<figure-callout id="2" label="D" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1)\times \text{k}\end{array}$$
    
    is fulfilled, where
  • λ is an air wavelength of electromagnetic waves in a prescribed frequency range to be received by the antenna element;
  • k is a wavelength shortening ratio of the glass plate in the prescribed frequency range;
  • N ₁ is an integer of 1 or greater;
  • N ₂ is an integer of 1 or greater;
  • D ₁ is a length of a first path extending from the feeding portion to a first high frequency terminal located on the power supply side along at least a part of the first bus bar; and
  • D ₂ is a length of a second path, which is different from the first path and extends from the feed section to a second high-frequency port, which is on the power supply side along a path in the direction from the top to the bottom of the heating region and at least a part of the second bus bar.

According to the present invention, it is possible to provide a window glass device for a vehicle, which allows an antenna element capable of ensuring a necessary gain in a prescribed frequency range to coexist with a heating region.

character list

• 1 12 is a plan view of a windowpane illustrating a configuration example of a windowpane device for a vehicle according to an embodiment.
• 2 14 is a plan view of a windowpane illustrating another configuration example (modification) of a windowpane device for a vehicle according to another embodiment.
• 3 14 is a sectional view illustrating an upper portion of a first configuration example of a windowpane device for a vehicle according to an embodiment.
• 4 14 is a sectional view illustrating an upper portion of a first modification of the first configuration example of the windowpane device for a vehicle according to the embodiment.
• 5 14 is a sectional view illustrating an upper portion of a second modification of the first configuration example of the windowpane device for a vehicle according to the embodiment.
• 6 14 is a sectional view illustrating an upper portion of a second configuration example of a windowpane device for a vehicle according to another embodiment.
• 7 14 is a graph showing an example of actual measurement results showing how the antenna gain varied when the lengths D ₁ and D ₂ were adjusted in the window glass device for a vehicle according to an embodiment.
• 8th 14 is a graph showing an example of actual measurement results showing how the antenna gain varied depending on the presence/absence of a stub in the window glass device for a vehicle according to an embodiment.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments according to the present invention will be described below with reference to the drawings. To facilitate understanding, the scale of each member illustrated in each drawing may be different from an actual one. The direction expressed by each of expressions "parallel to", "normal to", "to cross normally", "horizontal", "vertical", "top/bottom", "left/right" or the like allowed to have a deviation that does not impair the effects of the embodiment. The shape of each corner portion is not limited to a rectangular shape and may be rounded like an arc. The terms "X-axis direction", "Y-axis direction", and "Z-axis direction" represent directions that are parallel to the X-axis, Y-axis, and Z-axis, respectively. The X-axis direction, the Y-axis direction, and the Z-axis direction are normal to each other. The terms "XY plane", "YZ plane" and "ZX plane" represent an imaginary plane parallel to the X-axis direction and the Y-axis direction, an imaginary direction parallel to the Y-axis -direction and the Z-axis direction, and an imaginary plane which is parallel to the Z-axis direction and the X-axis direction, respectively. The phrase “opposed to” refers not only to a shape that an affected limb faces corresponding portions of a counterpart in its entirety, and may include a shape that a concerned limb faces a counterpart only partially.

In embodiments, the X-axis direction, the Y-axis direction, and the Z-axis direction represent the left-right direction of a glass panel (horizontal direction), the top/bottom direction (vertical direction) of the glass panel, and .the direction normal to the surface of the glass plate (also referred to as a "normal direction").

A preferred example of a windowpane for a vehicle according to an embodiment is a windshield to be fixed to a front portion of a vehicle.

1 12 is a plan view of a windowpane illustrating a configuration example of a windowpane device for a vehicle according to an embodiment. a window Rear disc device 300 for a vehicle, which in 1 1 is equipped with a window frame 66 formed in a vehicle body and a window glass 100 fixed to the window frame 66. FIG. 1 12 is a plan view in which the windowpane 100 fixed to the window frame 66 is viewed from the inside of the vehicle. The window pane 100, which in 1 1 is a windshield fixed to the window frame 66 formed in a front portion of the vehicle body.

The window frame 66 has a top frame 66a, a bottom frame 66b, a left frame 66c, and a right frame 66d to form an opening to be covered with the window glass 100. As shown in FIG. The upper frame 66a is a window frame portion which extends in the X-axis direction on the positive side of the opening in the Y-axis direction and is, for example, a ceiling-side flange of the vehicle body. The floor frame 66b is a window frame portion which extends in the X-axis direction on the negative side of the opening in the Y-axis direction, and is, for example, an instrument panel-side flange of the vehicle body. The left frame 66c is a window frame portion which extends in the Y-axis direction on the negative side of the opening in the X-axis direction and is, for example, a flange of an A pillar arranged at a front left position of the vehicle body . The right frame 66d is a window frame portion which extends in the Y-axis direction on the positive side of the opening in the X-axis direction and is, for example, a flange of an A pillar arranged at a front right position of the vehicle body .

The window pane 100 is equipped with a glass plate 1 , a first bus bar 3 , a second bus bar 4 and an antenna element 30 .

The glass panel 1 is an example of a glass panel for a vehicle. The glass plate 1 is a transparent or semi-transparent plate-shaped dielectric to be fixed to the window frame 66 . The glass panel 1 has an outer peripheral edge which includes a top edge 1a, a bottom edge 1b, a left edge 1c and a right edge 1d. The top edge 1a is a glass edge which extends in the X-axis direction on the positive side of the Y-axis direction, and is fixed to the upper frame 66a. The bottom rim 1b is a glass rim which extends in the X-axis direction on the negative side of the Y-axis direction, and is fixed to the bottom frame 66b. The left edge 1c is a glass edge which extends in the Y-axis direction on the negative side of the X-axis direction, and is fixed to the left frame 66c. The right edge 1d is a glass edge which extends in the Y-axis direction on the positive side of the X-axis direction, and is fixed to the right frame 66d.

The glass plate 1 has a main surface 22 and a main surface 12 which is opposite to the main surface 22 in the Z-axis direction. The main surface 22 is a surface located on the positive side (inside the vehicle in this example) in the Z-axis direction, and the main surface 12 is a surface located on the negative side (inside the vehicle in this example) in the Z -Axis direction is arranged.

The first bus bar 3 is a band-shaped electrode formed on the glass panel 1, and includes upper portions 71 and 79 extending in a direction along the upper edge 1a of the glass panel 1 (e.g., approximately in the horizontal direction). extend. The first bus bar 3 is electrically connected to an electrode terminal (e.g. negative terminal 402) of a power supply 400 installed in the vehicle.

The second bus bar 4 is a band-shaped electrode formed on the glass panel 1, and includes bottom portions 72 and 70 extending in a direction along the bottom edge 1b of the glass panel 1 (e.g., approximately in the horizontal direction). The second bus bar 4 is electrically connected to the other electrode terminal (e.g. positive terminal 401) of the power supply 400 installed in the vehicle.

Alternatively, the first bus bar 3 and the second bus bar 4 may be electrically connected to the positive terminal 401 and the negative terminal 402 of the power supply 400, respectively.

The glass panel 1 has a heating region 2 extending between the top portions 71 and 79 of the first busbar 3 and the bottom portions 72 and 70 of the second busbar 4 . The heating region 2 is a region where a conductive member 26 is formed, and the heating region 2 heats up when the conductive member 26 heats created or generated. The heating region 2 has vertical sides 6a and 6b, which are a pair of sides facing each other in the X-axis direction.

The conductive member 26 is formed on the glass panel 1 between the top portions 71 and 79 of the first bus bar 3 and the bottom portions 72 and 70 of the second bus bar 4 . The conductive member 26 is a material through which a direct current flows in the top-to-bottom direction between the top portions 71 and 79 of the first bus-bar 3 and the bottom portions 72 and 70 of the second bus-bar 4 when a DC voltage is supplied between the first bus bar 3 and the second bus bar 4 from the power supply 400, and the conductive member 26 generates heat when a DC current flows in the top-to-bottom direction. The heating region 2 heats up when the conductive member 26 electrically connecting the top portions 71 and 79 of the first bus bar 3 and the bottom portions 72 and 70 of the second bus bar 4 generates heat. Melting of snow or ice, defogging or the like can be obtained in the heating region 2 and in its vicinity of the glass panel 1 by heating the heating region 2 .

For example, as in 1 Illustrated in an enlarged manner, the conductive member 26 consists of a plurality of electrically heated wires which extend in the Y-axis direction and are arranged to be spaced from each other in the X-axis direction. For example, the plurality of electrically heated wires are corrugated strip conductors that extend from the first bus bar 3 to the second bus bar 4 . For example, the electrically heated wires are made of copper, aluminum, chromium, molybdenum, nickel, titanium, palladium, indium, tungsten, gold, platinum, or silver, or an alloy of several thereof.

The conductive member 26 may be any of a transparent or semi-transparent conductive film formed inside the glass panel 1 as an inner layer or on a surface of the glass panel 1 from heat generating wires formed inside the glass plate 1 as an inner layer or on a surface of the glass plate 1, and silver-based print(s) formed on a surface of the glass plate 1 or are.

In the case where the conductive member 26 is a conductive film, the material of the conductive film may be antimony-doped tin oxide, bismuth-doped tin oxide, fluorine-doped tin oxide, or the like.

The conductive member 26 may be formed inside the glass panel 1 as an inner layer or on its outer surface. The conductive member 26 is formed in the same layer (as an inside layer or on the outside surface) as the first bus bar 3 and the second bus bar 4 . Alternatively, the conductive member 26 may be formed in a different layer than at least one of the first bus bar 3 and the second bus bar 4 when the conductive member 26 is electrically connected to at least one of the first bus bar 3 and the second bus bar 4 via an auxiliary member is connected or attached.

The heating region 2 in which the conductive member 26 is arranged may be divided into a plurality of heating sub-regions arranged in the X-axis direction. In the example shown in 1 1, the heating region 2 includes a first heating region 2a and a second heating region 2b arranged in the X-axis direction with a gap 9 formed therebetween, the gap 9 defining the Y-axis direction as its longitudinal direction. The first heating region 2a has top sides 6e and 6f electrically connected to the top portion 71 of the first bus bar 3, a bottom side 6g electrically connected to the bottom portion 72 of the second bus bar 4, and a pair of vertical sides 6a and 6c facing each other in the X-axis direction. The second heating region 2b has a top 6h electrically connected to the top portion 79 of the first bus bar 3, a bottom side 6i electrically connected to the bottom portion 70 of the second bus bar 4, and a pair of vertical sides 6b and 6d, which face each other in the X-axis direction.

In the example shown in 1 1, since the heating region 2 is divided into a plurality of heating regions, each of the first bus bar 3 and the second bus bar 4 is also divided. The first bus bar 3 includes a first top bus bar 3a and a second top bus bar 3b, and the second bus bar 4 includes a first bottom bus bar 4a and a second bottom bus bar 4b.

The first busbar 3 may further include vertical sections connected to its upper sections 71 and 79 . In the first busbar 3, which 1 As illustrated, the first upper busbar 3a includes a vertical portion 73 connected to its top portion 71, and the second upper busbar 3b includes a vertical portion 76 connected to its top portion 79 connected is. The top portion 71 is a conductor portion connected to the top sides 6e and 6f of the first heating region 2a. The vertical portion 73 is a conductor portion which is spaced from the vertical side 6a which is a vertical side of the first heating region 2a and which extends along the left edge 1c which is a side edge of the glass plate 1. FIG. The top portion 79 is a conductor portion connected to the top side 6h of the second heating region 2b. The vertical portion 76 is a conductor portion which is spaced from the vertical side 6b which is a vertical side of the second heating region 2b and which extends along the right edge 1d which is the other side edge of the glass plate 1. FIG.

Since the first bus bar 3 includes the vertical sections 73 and 76 which are connected to the respective top sections 71 and 79, part of each of wiring lines for electrically connecting the top sections 71 and 79 of the first bus bar 3 to the power supply 400 may be provided on the glass panel 1 side rather than on the vehicle body side. As a result, cables of wiring laid on the vehicle body side can be reduced.

Like this in 1 As illustrated, the first busbar 3 may further include a horizontal portion 74 connected to the vertical portion 73 and may further include a horizontal portion 77 connected to the vertical portion 76 . The horizontal portion 74 is a conductor portion extending along the bottom edge 1b of the glass plate 1 in a region spaced from the first heating region 2a. The horizontal portion 77 is a conductor portion extending along the bottom edge 1b of the glass plate 1 in a region spaced from the second heating region 2b. The presence of the horizontal portion 74 or 77 makes it possible to further reduce the cables of wiring laid on the vehicle body side depending on the positions of associated terminals of the wiring.

in the in 1 In the illustrated example, the glass plate 1 has a plurality of electrodes 51, 52, 55 and 56. Terminals to be electrically connected to the power supply 400 of a plurality of wires of the wiring harness are to be electrically connected to the electrodes.

The electrode 51 is a negative electrode for electrically connecting the terminal to be electrically connected to the negative terminal 402 of a ground wire 53 of the wiring to the first upper bus bar 3a. The electrode 51 is electrically connected to the top portion 71 via the horizontal portion 74 and the vertical portion 73 .

The electrode 52 is a negative electrode for electrically connecting the terminal to be electrically connected to the negative terminal 402 of the ground wire 54 of the wiring to the second upper bus bar 3b. The electrode 52 is electrically connected to the top section 79 via the horizontal section 77 and the vertical section 76 .

The electrode 55 is a positive electrode for electrically connecting the terminal, which is to be electrically connected to the positive electrode 401, of a power cable 57 of the wiring to the first ground busbar 4a. The first bottom busbar 4a has a connection busbar 75 connected to the bottom portion 72 . The electrode 55 is electrically connected to the bottom portion 72 via the connection busbar 75 .

The electrode 56 is a positive electrode for electrically connecting the terminal, which is to be electrically connected to the positive electrode 401, of the power cable 58 of the wiring to the second floor busbar 4b. The second bottom busbar 4b has a connection busbar 78 connected to the bottom portion 70 . The electrode 56 is electrically connected to the bottom portion 70 via the connection busbar 78 .

The antenna element 30 is formed on the glass plate 1 and includes a feeding portion 35 which is located close to the first bus bar 3 . The antenna element 30 is an antenna for ensuring a necessary antenna gain by receiving a current flowing along the first bus bar 3 through the feeding section 35. In FIG 1 In the illustrated example, the feeding portion 35 is arranged close to the top portion 71 of the first bus bar 3 not. The antenna element 30 is configured to be able to receive electromagnetic waves in a prescribed frequency range W and resonates at a frequency in the predetermined or prescribed frequency range W. The antenna element 30 can be either a radiating element emitting vertically polarized waves receives, or a radiating element which receives horizontally polarized waves. The antenna element 30 is suitable for transmission and reception of electromagnetic waves, for example, in a VHF band (Very High Frequency) with a frequency of 30 MHz to 300 MHz. Electromagnetic waves in the VHF band include electromagnetic waves in DAB (Digital Audio Broadcast) Band III (170 MHz to 240 MHz), FM broadcast waves, and the like.

Now, let λ represent a wavelength in the air of electromagnetic waves in the prescribed frequency range W received by the antenna element 30, k represent a wavelength shortening ratio of the glass plate 1 in the prescribed frequency range W, and let N ₁ and N ₂ respectively be an integer of 1 or greater. In addition, let D ₁ represent a length of a first path extending from the feeding portion 35 to a first high-frequency terminal located on the power supply 400 side along at least a part of the first bus bar 3, and D ₂ a length of a second path or path, which is different from the first path and extends from the supply section 35 to a second high-frequency terminal, which is on the side of the power supply 400 along a path in the direction from the top to the bottom of the heating region 2 and at least a part of the second busbar 4 is arranged.

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}8\right)\times \left(2\times {\text{N}}_2-1\right)\times \text{k}\le {\text{D}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}8\right)\times (2\\ \times {\text{N}}_2-1)\times \text{k}\end{array}$$

The antenna gain of the antenna element 30 in the prescribed frequency range W can be increased in the case where the lengths D ₁ and D ₂ satisfy at least one, preferably both, of the following formulas 1a and 2a. $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1\right)\times \text{k}\le {\text{<figure-callout id="1" label="D" filenames="DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1)\times \text{k}\end{array}$$

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1\right)\times \text{k}\le {\text{<figure-callout id="2" label="D" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1)\times \text{k}\end{array}$$

The first and second high-frequency terminals are points at which a high-frequency current becomes zero. When the path length D ₁ from the first RF port to the feed section 35 is an odd multiple of λ/4 (including a margin defined as an “odd multiple of ±λ/8”), the position of an anti-node falls standing wave occurring along the first path approximately together with the feed section 35 . Similarly, when the path length D ₂ from the second RF port to the feed section 35 is an odd multiple of λ/4 (including a margin defined as an “odd multiple of ±λ/8”), the position of a falls Anti-nodes of a standing wave occurring along the second path approximately together with the feed section 35 . In the case where one or both of the path lengths D ₁ and D ₂ satisfies the above formula (s) 1a and/or 2a, a large current flows through the feeding portion 35 which is close to the first bus bar 3 or in the vicinity thereof, and therefore the antenna gain of the antenna element 30 in the prescribed frequency range W can be increased. Thus, in the windowpane device 300 for a vehicle according to the embodiment, the antenna element 30 capable of ensuring a necessary antenna gain in the prescribed frequency range W can coexist with the heating region 2 even in the case where the heating region 2 has a relatively wide Has surface or a wide range.

In formulas 1a and 2a, λ may represent wavelengths in the air of electromagnetic waves at frequencies that form part of the prescribed frequency range W, and preferably wavelengths in the air of electromagnetic waves at all frequencies that are included in the prescribed frequency range W .

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \left(2\times {\text{N}}_2-1\right)\times \text{k}\le {\text{D}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times (2\\ \times {\text{N}}_2-1)\times \text{k}\end{array}$$

In a more preferable case, the path length D ₁ or D ₂ satisfies the following formula 1b or 2b. In a further preferred case, the path lengths D ₁ and D ₂ satisfy the following formulas 1b and 2b. $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \left(2\times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1\right)\times \text{k}\le {\text{<figure-callout id="1" label="D" filenames="DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times (2\\ \times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1)\times \text{k}\end{array}$$

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \left(2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1\right)\times \text{k}\le {\text{<figure-callout id="2" label="D" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times (2\\ \times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1)\times \text{k}\end{array}$$

In the case where the path length D ₁ or D ₂ satisfies the above-mentioned formula 1b or 2b, preferably the path lengths D ₁ and D ₂ satisfy the above-mentioned formula 1b and 2b, the antenna gain of the antenna element 30 in the prescribed Bene frequency range W can be further increased or increased. In formulas 1b and 2b, λ may represent in-air wavelengths of electromagnetic waves at frequencies that form part of the prescribed W frequency range, and preferably, in-air wavelengths of electromagnetic waves at all frequencies included in the prescribed W frequency range.

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}10\right)\times \left(2\times {\text{N}}_2-1\right)\times \text{k}\le {\text{D}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}10\right)\times \\ (2\times {\text{N}}_2-1)\times \text{k}\end{array}$$

In a more preferred case, the path lengths D ₁ or D ₂ satisfy the following formula 1c or 2c. In a more preferred case, the path lengths D ₁ and D ₂ satisfy the following formulas 1c and 2c. $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}10\right)\times \left(2\times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1\right)\times \text{k}\le {\text{<figure-callout id="1" label="D" filenames="DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}10\right)\times \\ (2\times {\text{<figure-callout id="1" label="N" filenames="DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_1-1)\times \text{k}\end{array}$$

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}10\right)\times \left(2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1\right)\times \text{k}\le {\text{<figure-callout id="2" label="D" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">D</figure-callout>}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}10\right)\times \\ (2\times {\text{<figure-callout id="2" label="N" filenames="DE102021005871A1\_0023.png,DE102021005871A1\_0024.png" state="{{state}}">N</figure-callout>}}_2-1)\times \text{k}\end{array}$$

In the case where the path length D ₁ or D ₂ satisfies the above-mentioned formula 1c or 2c, preferably the path lengths D ₁ and D ₂ satisfy the above-mentioned formulas 1c and 2c, the antenna gain of the antenna element 30 in the prescribed frequency range W can be further be increased or increased. In formulas 1c and 2c, λ may represent wavelengths in the air of electromagnetic waves at frequencies that form part of the prescribed frequency range W, and preferably wavelengths in the air of electromagnetic waves at all frequencies that are included in the prescribed frequency range W .

in the in 1 In the illustrated example, the feeding portion 35 is located close to the first bus bar 3 but is not in contact therewith. Thus, the length of a path from the feeder section 35 to the first busbar 3 , which is a part of the path length D ₁ , is defined as a shortest length between the feeder section 35 and the first busbar 3 . Similarly, the length of a path from the feed section 35 to the first bus bar 3 , which is a part of the path length D ₂ , is defined as a shortest length between the feed section 35 and the first bus bar 3 .

Although in the in 1 In the illustrated example, the feeding portion 35 is located in an upper region 8 (which will be described later) in a plan view of the window glass 100, the concept of the present invention is not limited to this example. The feeding portion 35 may be arranged to extend along with at least a part of the first bus bar 3 (e.g. the first upper bus bar 3a) or at least a part of the heating region 2 (e.g. the first heating region 2a) in the plan view of the window glass 100.

in the in 1 In the illustrated example, the “at least part of the first bus bar 3” included in the first path consists of a first top portion 71a of the top portion 71, the vertical portion 73, and the horizontal portion 74. In addition, in FIG 1 illustrated example, the first high-frequency terminal arranged on the power supply 400 side is the negative terminal 402. However, in the case where a filter 403 for attenuating a high-frequency signal having a frequency included in the prescribed frequency range W , inserted in series with the ground wire 53 of the wiring, the first high-frequency terminal, which is arranged on the power supply 400 side, an input terminal 403a of the filter 403. The filter 403 may be provided on the glass plate 1, and more specifically, in series with the be used or inserted vertical section 73. Also in this case, the first high-frequency terminal, which is arranged on the side of the power supply 400, is the input terminal 403a of the filter 403.

In a modified configuration in which the heating region 2 is not partitioned by the gap 9, the "at least a part of the first bus bar 3" included in the first path can be composed of a second upper portion 71b of the upper portion 71, the upper section 79, the vertical section 76 and the horizontal section 77 exist. In the case where a filter 406 for attenuating a high-frequency signal having a frequency included in the prescribed frequency range W is inserted in series with the ground wire 54 of the wiring, the first high-frequency terminal which is on the side of the power supply 400, an input terminal 406a of the filter 406. The filter 406 may be provided on the glass plate 1, and more specifically, may be inserted in series with the vertical portion 76 or the horizontal portion 77. In this case, too, the first high-frequency connection, which is arranged on the side of the power supply 400, is the input connection 406a of the filter 406.

in the in 1 In the illustrated example, the second path goes through the heating region 2 in the top-to-bottom direction and at least a part of the second bus bar 4. The “at least a part of the second bus bar 4” included in the second path consists of a part of the bottom portion 72 and the connection bus bar 75. In Fig 1 In the illustrated example, the second high-frequency terminal arranged on the power supply 400 side is the positive terminal 401. However, in the case where a filter 405 for attenuating a high-frequency signal having a frequency included in the prescribed frequency range W is inserted in series with the power cable 57 of the wiring, the second high-frequency terminal arranged on the power supply 400 side, an input terminal 405a of the filter 405. The filter 405 can be provided on the glass plate 1 and can more specifically in series with the connection busbar 75 . Also in this case, the second high-frequency terminal, which is arranged on the side of the power supply 400, is the input terminal 405a of the filter 405.

In a modified configuration in which the heating region 2 is not divided by the gap 9, the "at least a part of the second bus bar 4" included in the second path can be part of a portion on the right side of the bottom portion 70 and the connecting busbar 78. In the case where a filter 404 for attenuating a high-frequency signal having a frequency included in the prescribed frequency range W is inserted in series with the power cable 58 of the wiring, the second high-frequency terminal, which is on the power supply 400 side, an input terminal 404 a of the filter 404 . In this case, too, the second high-frequency connection, which is arranged on the side of the power supply 400, is the input connection 404a of the filter 404.

An example of each of the filters 403, 404, 405 and 406 is an LC filter which has an inductor L and a capacitor C .

in the in 1 In the illustrated example, the antenna element 30 is provided in at least part of the upper region 8 . In the entire region of the glass panel 1 in a plan view, the upper region 8 is a region located between the top frame 66a of the window frame 66 (the upper side of the opening) and the upper portions 71 and 79 of the first bus bar 3 . The antenna element 30 is provided in an antenna region 5 which is arranged in the upper region 8 .

The antenna element 30 may include a linear element 37 electrically connected to the feeding portion 35 . In this case, the antenna gain of the antenna element 30 in the prescribed W frequency range can be enhanced more by forming the linear element 37 so that its length is suitable for reception of electromagnetic waves in the prescribed W frequency range.

$$5\text{/}32\times \mathrm{\lambda }\times \text{k}\le {\text{L}}_{\text{A}}\le 7\text{/}32\times \mathrm{\lambda }\times \text{k}$$

In den Formeln 3a und 3b kann λ Wellenlängen in der Luft von elektromagnetischen Wellen bei Frequenzen repräsentieren, welche ein Teil des vorgeschriebenen Frequenzbereichs W bilden, vorzugsweise von Wellenlängen in der Luft von elektromagnetischen Wellen bei allen Frequenzen, welche in dem vorgeschriebenen Frequenzbereich W enthalten sind.Let L _A represent the length of the linear element 37. For example, in the case where the length L _A satisfies the following formula 3a, and preferably satisfies the following formula 3b, the antenna gain of the antenna element 30 in the prescribed frequency range W can be increased more. $$1\text{/}\mathrm{8th}\times \mathrm{\lambda }\times \text{k}\le {\text{L}}_{\text{A}}\le 1\text{/}4\times \mathrm{\lambda }\times \text{k}$$

$$5\text{/}32\times \mathrm{\lambda }\times \text{k}\le {\text{L}}_{\text{A}}\le 7\text{/}32\times \mathrm{\lambda }\times \text{k}$$

In formulas 3a and 3b, λ may represent wavelengths in the air of electromagnetic waves at frequencies that form part of the prescribed frequency range W, preferably wavelengths in the air of electromagnetic waves at all frequencies that are included in the prescribed frequency range W .

In a plan view of the glass plate 1, the antenna region 5 may be an elongated region in which the horizontal length is longer than the vertical length. In particular, in the case of the antenna element 30 having the linear element 37, the antenna region 5 is preferably a horizontally long (roughly rectangular) region of smallest area containing the entire antenna element 30. FIG. The antenna region 5 is provided between the upper frame 66a of the window frame 66 and the first bus bar 3 . In the case where the antenna region 5 is a horizontally long region including the feeding portion 35 and the linear element 37, the length of the antenna element 30 in the Y-axis direction can be made small, giving the heating region 2 a large area while ensuring a necessary antenna gain of the antenna element 30 .

Although in the in 1 Illustrated example, the feeding portion 35 is arranged outside of the heating region 2 in a plan view of the glass plate 1, the feeding portion 35 may be formed to with to overlap the heating region 2 or to be located entirely above or below the same. Although in the in 1 In the illustrated example, the linear element 37 is arranged outside the heating region 2 in a plan view of the glass plate 1 , the linear element 37 can be formed to overlap with the heating region or to be arranged completely above or below the heating region 2 .

The first heating region 2a includes the first top side 6f, which extends along the top edge 1a of the glass plate 1, and the second top side 6e, which is spaced farther from the top edge 1a than the first top side 6f and extends along the top Edge 1a extends. The upper portion 71 of the first upper bus bar 3a extends along the first upper side 6f and the second upper side 6e. As a result, since a cranked portion 7 is formed in the upper portion 71 of the first upper bus bar 3a as shown in FIG 1 As illustrated, a depressed region 81 is formed in the upper region 8 . in the in 1 In the illustrated example, the antenna element 30 is formed in the stepped region 81 .

The stepped region 81 may be a region (in the upper region 8) having as a boundary a line segment extending from an end portion on the first upper side 6f side of the cranked portion 7 toward the positive side in the Y -axis direction and reaches the upper frame 66a of the window frame 66. Alternatively, the stepped region 81 may be a rectangular region (in the upper region 8) having as a vertical length the height of the cranked portion 7 in the Y-axis direction and as a horizontal length the entire length in the X-axis direction of the cranked portion 7 and the first upper portion 71a.

The top portion 71 of the first bus bar 3 has the cranked portion 7, the first top portion 71a extending toward one side from the cranked portion 7, and the second top portion 71b extending toward the other side from the cranked portion 7 extends.

The cranked portion 7 has a third upper portion 71c, a first bent portion 91 formed at the connecting position of the first upper portion 71a and the third upper portion 71c, and a second bent portion 92 formed at the connecting position of the second upper portion 71b and the third upper portion 71c, thereby assuming a crank shape.

Since the stepped region 81 is formed in the upper region 8, a region 82 different from the stepped region 81 is formed in the upper region 8 and the length in the Y-axis direction of the region 82 is different from the stepped region 81 can be made shorter than the length in the Y-axis direction of the stepped region 81. As a result, the length in the Y-axis direction of the portion connected to the second upper portion 71b of the first heating region 2a can be made longer than the other portion, thereby lowering the anti-fogging effect and the anti -Icing effect of the glass plate 1 can be further suppressed, while a necessary antenna gain of the antenna element 30 in the prescribed frequency range W is or is ensured.

As in a modification example given in 2 As illustrated, the stepped region 81 may be located at an upper center position of the glass panel 1 . in the in 2 In the illustrated example, the first top side 6f and the second top portion 71b extend along the top edge 1a at a position which is further apart from the top edge 1a than the position of the second top side 6e and the first top portion 71a.

in the in 1 In the illustrated example, at least part of the vertical portion 73 is capacitively coupled to the window frame 66 (more specifically, to a metal portion of the left frame 66c) to which the glass panel 1 is fixed. As a result, the antenna gain of the antenna element 30 in the prescribed frequency range W can be further increased. The term "capacitively coupled" means that there is a portion where the distance between the vertical portion 73 and the window frame 66 (more specifically, with the metal portion of the left frame 66c) is longer than 0 mm and 30 mm or shorter.

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \left(2\text{P}-1\right)\times \text{k}\le {\text{D}}_{\text{c}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times (2\text{P}-\\ 1)\times \text{k}\end{array}$$

Let _Dc represent the length of the portion capacitively coupled to the window frame 66 (more specifically, the metal portion of the left frame 66c) of the first busbar 3, and let P be an integer of 1 or greater. For example, in the case where the length D _c satisfies the following formula 4a, and preferably satisfies the following formula 4b, the antenna gain of the antenna element 30 in the prescribed frequency range W can be further increased. $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\text{P}-1\right)\times \text{k}\le {\text{D}}_{\text{c}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\text{P}-\\ 1)\times \text{k}\end{array}$$

$$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \left(2\text{P}-1\right)\times \text{k}\le {\text{D}}_{\text{c}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times (2\text{P}-\\ 1)\times \text{k}\end{array}$$

In Formulas 4a and 4b, λ may represent airborne wavelengths of electromagnetic waves at frequencies that form part of the prescribed W frequency range, preferably airborne wavelengths of electromagnetic waves at all frequencies included in the prescribed W frequency range.

The windowpane device 300 for a vehicle may be equipped with a connector formed on the glass panel 1 and serving to attenuate a high-frequency signal having a frequency included in the prescribed frequency range W . The connector has one end electrically connected to the first bus bar 3 or the second bus bar 4 and an open end opposite to the one end. The connecting member is formed in a region which does not overlap with the heating region 2 in a plan view of the glass plate 1. FIG. The connecting element can be directly connected to the first busbar 3 or the second busbar 4 . A connecting element 43, which in 1 shown by way of example is a branch member having an end 41 at which the connecting member 43 is connected to the vertical portion 73 which is an intermediate portion of the first bus bar 3, and an open end 42 which is the one End 41 opposite. The presence of such a connection element 43 can increase the antenna gain of the antenna element 30 in the prescribed frequency range W more.

$$\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \text{k}\le {\text{L}}_{\text{s}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times \text{k}$$

Let L _s represent the length of the connecting element 43 . For example, in the case where the length L _s satisfies the following formula 5a, and preferably satisfies the following formula 5b, the connector 43 functions as a stub and therefore the antenna gain of the antenna element 30 in the prescribed frequency range W can be further increased. $$\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \text{k}\le {\text{L}}_{\text{s}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \text{k}$$

$$\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}9\right)\times \text{k}\le {\text{L}}_{\text{s}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}9\right)\times \text{k}$$

In Formulas 5a and 5b, λ may represent in-air wavelengths of electromagnetic waves at frequencies that form part of the prescribed W frequency range, and preferably, in-air wavelengths of electromagnetic waves at all frequencies included in the prescribed W frequency range.

In a configuration in which the connector 43 is electrically connected to the first busbar 3 at the one end 41, the "at least part of the first busbar 3" included in the first path consists of the first upper portion 71a of the upper portion 71 and the vertical portion 73, and the first high-frequency terminal, which is arranged on the side of the power supply 400, is the one end 41. That is, in the configuration in which the connecting member 43 is electrically connected to the first bus bar 3 at the one end 41, the length D ₁ corresponds to the path length from the feed section 35 to one end 41. Similarly, in a modified configuration (not illustrated) in which a connector electrically connects to the second busbar 4 at its one end is connected, the length D ₂ of the path length from the feed section 35 to the one end of the connecting element.

3 14 is a sectional view illustrating an upper portion of a first configuration example of the windowpane device for a vehicle according to an embodiment. A window glass device 300A for a vehicle, which is disclosed in 3 is an example of the window glass device 300 for a vehicle, which is illustrated in FIG 1 is illustrated. In 3 In a state where the glass panel 1 is fixed to the window frame 66 of a vehicle body 62, the positive side of the Z-axis direction corresponds to the vehicle inside and the negative side of the Z-axis direction corresponds to the vehicle outside. in the in 3 In the illustrated example, the glass panel 1 is a laminated glass in which a glass panel 10 arranged on the vehicle outer side and a glass panel 20 arranged on the vehicle inner side are bonded to each other with an intervening film 40 between them is interposed. The intermediate film 40 is interposed between the glass plate 10 and the glass plate 20 .

The glass panel 1 is attached to a flange-shaped window frame 66 by, for example, bonding a peripheral portion of the main surface 22 of the glass panel 20 to to the window frame 66 with an adhesive 65 such as a urethane resin. The window frame 66 has a metal portion 63 facing at least part of a peripheral portion of the main surface 22 in a plan view of the glass panel 1 as viewed from the Z-axis direction. The inner edge 64 of the metal portion 63 forms an opening covered with the glass panel 1 in a plan view as viewed from the Z-axis direction.

Each of the glass plates 10 and 20 is a transparent plate-shaped dielectric. One or both of the glass plates 10 and 20 may be semi-transparent. The glass panel 10 is an example of a “first glass panel”, and the glass panel 20 is an example of a “second glass panel”.

The glass plate 10 has a main surface 11 and a main surface 12 opposite to the main surface 11 in the Z-axis direction. The main surface 11 is a surface located on the vehicle inside, and the main surface 12 is a surface located on the vehicle outside. In particular, the main surface 12 is an outer surface of the laminated glass, which is arranged on the vehicle outside.

The glass panel 20 has a main surface 21 facing the main surface 11 of the glass panel 10 and a main surface 22 facing the main surface 21 in the Z-axis direction. The main surface 21 is a surface located on the vehicle outside, and the main surface 22 is a surface located on the vehicle inside. Specifically, the major surface 22 is an outer surface of the laminated glass, which is located on the vehicle interior.

The intermediate film 40 is a transparent or semi-transparent dielectric which is interposed between the glass plates 10 and 20 . The glass plates 10 and 20 are bonded to each other with the film 40 therebetween. For example, the intermediate film 40 is made of a thermoplastic polyvinyl butyral (PVB), an ethylene-vinyl acetate copolymer (EVA), or the like.

For example, the feeding portion 35 is a feeding electrode formed on the main surface 22 . The feeding section 35 has a feeding point 36 to which one end of a feeding line 32 is connected, and the feeding section 35 is connected to an input unit of an amplifier 61 via the feeding line 32 . The amplifier 61 can be implemented in the feed section 35 . A signal obtained when electromagnetic waves are received by the antenna element 30 is input to the input unit of the amplifier 61 via the feeding point 36 of the feeding section 35 . The signal input to the input unit of the amplifier 61 is subjected to filtering by a band-pass filter and amplification by an amplification circuit, and then output from the amplifier 61. FIG.

The conductive member 26 is interposed between the glass plates 10 and 20 . in the in 3 In the illustrated example, the conductive member 26 is interposed between the glass plate 10 and the intermediate film 40 and is in contact with the main surface 11. The glass plate 20 has the main surface 22 which the intermediate film 40 opposes. The antenna element 30 is formed on the main surface 22 . in the in 3 In the illustrated example, the linear member 37 and the feeding portion 35 are formed on the main surface 22 in their entirety.

As in an example given in 4 As illustrated, the conductive member 26 may be interposed between the intervening film 40 and the glass plate 20 and may be in contact with the major surface 21 . As in an example given in 5 As illustrated, the conductive member 26 may be disposed between a first intermediate film 40A and a second intermediate film 40B. The first intermediate film 40A is a dielectric intermediate film sandwiched between the glass panel 10 and the conductive member 26, and the second intermediate film 40B is a dielectric intermediate film sandwiched between the conductive member 26 and the glass panel 20. The first intermediate film 40A and the second intermediate film 40B may be made of either the same material or different materials. It is preferable that the first intermediate film 40A and the second intermediate film 40B are made of the same material because they are made equivalent in physical properties such as thermal expansion coefficient.

6 14 is a sectional view illustrating an upper portion of a second configuration example of the windowpane device for a vehicle according to an embodiment. A window glass device 300B for a vehicle, which is disclosed in 6 1 is another example of the windowpane device 300 for driving stuff, which in 1 is illustrated. Those components of the configuration which are 6 is illustrated, which have the same components in the configuration shown in 3 , 4 or 5 illustrated will not be described here, using as a substitute corresponding descriptions given above with reference to FIG 3 , 4 or 5 were made.

The conductive member 26 and at least part of the antenna element 30 are sandwiched between the glass plates 10 and 20. As shown in FIG. in the in 6 illustrated example is, as in the in 3 Illustrated example, the conductive member 26 is placed between the glass plate 10 and the intermediate film 40 and is in contact with the main surface 11. Alternatively, the conductive member 26 can be placed either between the glass plate 20 and the intermediate film 40 as in FIG 4 illustrated example or between the intermediate films 40A and 40B as in FIG 5 illustrated example. The linear element 37, which is a part of the antenna element 30, is interposed between the glass plate 20 and the intermediate film 40 and is in contact with the main surface 21. A signal obtained when electromagnetic waves are received by the linear element 37 is input to the input unit of the amplifier 61 via capacitive coupling between the linear element 37 and the feeding section 35 . Alternatively, the linear element 37 may be formed either on the main surface 11 or between the intermediate films 40A and 40B in the Fig 5 illustrated example.

7 14 is a graph showing an example of actual measurement results showing how the antenna gain of the antenna element 30 varied when the lengths D ₁ and D ₂ were adjusted in the window glass for a vehicle according to an embodiment.

• D₁: 1.265 mm;
• D₂: 1.196 mm; und
• Länge L_A des linearen Elements 37: 155 mm.

Die Pfadlänge D₁ war die Pfadlänge von dem Zufuhrabschnitt 35 zu der Elektrode 51 über den vertikalen Abschnitt 73 der ersten Sammelschiene 3. Die Elektrode 51 war der erste Hochfrequenzanschluss. Die Pfadlänge D₂ war die Pfadlänge von dem Zufuhrabschnitt 35 bis zu der Elektrode 55 über die Heizregion 2 (d.h. das leitende Glied 26 der Heizregion 2). Die Elektrode 55 war der zweite Hochfrequenzanschluss. Die Länge L_A (155 mm) erfüllt die oben erwähnte Formel 3a bei allen Frequenzen im DAB Band III (170 MHz bis 240 MHz). Das Wellenlängen-Verkürzungsverhältnis k war 0,64.The dimensions of individual portions of the windowpane device 300 for a vehicle in the case of "No Adjustment" (see 7 ) were as follows:

• D ₁ : 1,265 mm;
• _D2 : 1,196 mm; and
• Length L _A of the linear element 37: 155 mm.

The path length D ₁ was the path length from the feeding section 35 to the electrode 51 via the vertical section 73 of the first bus bar 3. The electrode 51 was the first high-frequency terminal. The path length D ₂ was the path length from the feed portion 35 to the electrode 55 via the heating region 2 (ie the conductive member 26 of the heating region 2). Electrode 55 was the second high frequency terminal. The length L _A (155 mm) satisfies the above-mentioned formula 3a at all frequencies in DAB Band III (170 MHz to 240 MHz). The wavelength shortening ratio k was 0.64.

It can be found that the antenna gain curve of the antenna element 30 in the case of “No Adjustment” drops at around 230 MHz. Since k=0.64, at the wavelength λ corresponding to 230 MHz, in the case of “No Adjustment”, D ₁ (1,265 mm) did not satisfy the above-mentioned Formula 1a, and D ₂ (1,196 mm) did not satisfy the above-mentioned Formula 2a .

On the other hand, the dimensions of each portion of the windowpane device 300 for a vehicle were adjusted in the case of “D ₁ ” (a corresponding antenna gain curve is shown in FIG 7 shown) the same as in the case of “No adjustment” except that only D ₁ was adjusted to 1,470 mm (a length with which the formula 1a is satisfied at the wavelength λ corresponding to 230 MHz). The dimensions of each portion of the windowpane device 300 for a vehicle in the case of "D ₂ set" (a corresponding antenna gain curve is shown in FIG 7 shown) were the same as in the case of “No Adjustment” except that only D ₂ was adjusted to 1,035 mm (a length with which Formula 2a is satisfied at the wavelength λ corresponding to 230 MHz). The dimensions of each portion of the window glass device 300 for a vehicle in the case of "D ₁ and D ₂ set" (a corresponding antenna gain curve is shown in FIG 7 shown) were the same as in the case of "No Adjustment" except that D ₁ and D ₂ were adjusted to 1,470 mm and 1,035 mm, respectively.

Like this out 7 As can be seen, the antenna gain was increased around or at about 230 MHz by adjusting D ₁ , D ₂ or D ₁ and D ₂ such that formula 1a and/or formula 2a was (s) met.

8th 14 is a graph showing an example of actual measurement results showing how the antenna gain of the antenna element 30 varied depending on the presence or absence of a stub (more specifically, the connector 43) in the windowpane device for a vehicle according to an embodiment.

• D₁: 1.205 mm;
• D₂: 1.748 mm; und
• Länge L_A des linearen Elements 37: 170 mm.

Die Länge L_A (170 mm) erfüllt die oben erwähnte Formel 3a bei allen Frequenzen im DAB Band III (170 MHz bis 240 MHz). Das Wellenlängen-Verkürzungsverhältnis k war 0,64.The dimensions of individual portions of the windowpane device 300 for driving zeug in the case of "Without stub" (see 8th ) were as follows:

• D ₁ : 1,205mm;
• _D2 : 1,748 mm; and
• Length L _A of the linear element 37: 170 mm.

The length L _A (170 mm) satisfies the above-mentioned formula 3a at all frequencies in DAB Band III (170 MHz to 240 MHz). The wavelength shortening ratio k was 0.64.

It can be found that the antenna gain curve of the antenna element 30 in the case of “Without Stub” drops at around 220 MHz. Since k=0.64, at the wavelength λ corresponding to 220 MHz, in the case of “Without Stub Line”, D ₁ (1,205 mm) did not satisfy the above-mentioned formula 1a, and D ₂ (1,748 mm) did not satisfy the above-mentioned formula 2a .

On the other hand, an antenna gain curve of the antenna element 30 shown in 8th is illustrated, corresponding to the case "stub added" or "with stub" obtained when the connecting element 43, which had a length L _s of 220 mm, was connected to the vertical portion 73 at the one end 41 at such a position, that the length D ₁ of the first path from the feeding portion 35 to the one end 41 of the connecting member 43 became 1,080 mm. In the case of "stub added", the first high-frequency terminal can be determined by the connector 43, and the first high-frequency terminal corresponds to one end 41 of the connector 43. The length D ₁ (1,080 mm) corresponds to "five times λ/4", where this satisfies formula 1a for the wavelength λ corresponding to 220 MHz. The length Ls (220 mm) corresponds to "λ/4", which satisfies formula 5a for the wavelength λ corresponding to 220 MHz. Like this out 8th As can be seen, the antenna gain was increased around 220 MHz by adjusting the length D ₁ to meet Formula 1a and by adjusting the length Ls to meet Formula 5a.

Although the embodiments have been described above, the concept of the present invention is not limited to the embodiments described above. Various modifications and improvements, such as combination or substitution with all or part of each of other forms of implementation are possible.

The windowpane for a vehicle is not limited to a windshield, and may be a windowpane attached to other portions of a vehicle body. For example, the window glass for a vehicle may be a rear glass fixed to a window frame provided in a rear portion of a vehicle body, a side glass fixed to a window frame provided in a side portion of a vehicle body, a roof glass, which is fixed to a window frame provided in a ceiling portion of a vehicle body, or the like.

This application is based on Japanese Patent Application No. 2020-200200 , filed December 2, 2020, the contents of which are hereby incorporated by reference.

Reference List

1

glass plate

1a

upper edge or upper edge

1b

bottom edge or edge

1c

left edge or left margin

1d

right edge or right margin

2

heating region

2a

first heating region

2 B

second heating region

3

first busbar

3a

first upper busbar

3b

second upper busbar

4

second busbar

4a

first floor busbar

4b

second floor busbar

5

antenna region

6a, 6b, 6c, 6d

vertical side

6e, 6f, 6h

top or top

6g, 6i

bottom side

7

cranked section

8th

upper region

9

gap or distance

10, 20

glass plate

11, 12, 21, 22

main interface

26

conductive or conductive member

30

antenna element

32

supply line

35

feeding section

36

feed point

37

linear element

40

intermediate movie

40A

first interim film

40B

second intermediate film

41

an end

42

open end

43

fastener

51, 52, 55, 56

electrode

53, 54

Ground wire of a wiring harness or wiring harness

57, 58

Current or power cable of a wiring or cable harness

61

amplifier

62

vehicle body

63

metal section

64

inner edge or inner edge

65

adhesive

66

window frames

66a

top frame

66b

floor frame

66c

left frame

66d

right frame

70, 72

bottom section

71, 79

upper section

71a

first upper section

71b

second upper section

71c

third upper section

73, 76

vertical section

74, 77

horizontal section

75, 78

connection busbar

81

deepened or recessed region

82

region

91

first curved section

92

second curved section

100

windowpane

300, 300A, 300B

Window glass device for a vehicle

400

Power or power supply

401

positive connection

402

negative connection

403, 404, 405, 406

filter

403a, 404a, 405a, 406a

Input port

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• WO 2016/185898 [0002]
• WO 2016/096432 [0002]
• JP 2020200200 [0090]

Claims (18)

A window glass device for a vehicle, comprising: a glass plate; a first bus bar formed on the glass panel and including an upper portion extending in such a direction as to extend along an upper edge of the glass panel; a second bus bar formed on the glass panel and including a bottom portion extending in such a direction as to extend along a bottom edge of the glass panel; and an antenna element formed on the glass plate and including a feeding portion disposed close to the first bus bar, wherein: the glass plate includes a heating region extending between the top portion of the first bus bar and the bottom portion of the second bus bar; the heating region is a region where a conductive member through which a direct current flows in a direction from top to bottom when a direct current voltage is supplied between the first bus bar and the second bus bar from a power supply is arranged, and the heating region heats up, when the conductive member generates heat; and at least one of a formula 1a and a formula 2a: $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{N}}_1-1\right)\times \text{k}\le {\text{D}}_1\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{N}}_1-1)\times \text{k}\end{array}$$

and $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\times {\text{N}}_2-1\right)\times \text{k}\le {\text{D}}_2\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\\ \times {\text{N}}_2-1)\times \text{k}\end{array}$$

X is an air wavelength of electromagnetic waves in a prescribed frequency range to be received by the antenna element; no wavelength shortening ratio of the glass plate is in the prescribed frequency range; N ₁ is an integer of 1 or greater; N ₂ is an integer of 1 or greater; D ₁ is a length of a first path extending from the feeding portion to a first high-frequency terminal located on the power supply side along at least part of the first bus bar; and D ₂ is a length of a second path, which is different from the first path and extends from the feeding section to a second high-frequency terminal, which is on the power supply side along a path in the direction from the top to the bottom of the heating region and at least one Part of the second busbar is arranged. Window glass device for a vehicle claim 1 , where both formula 1a and formula 2a are fulfilled. Window glass device for a vehicle claim 1 or 2 wherein the antenna element further comprises a linear element which is electrically connected to the feeding portion. Window glass device for a vehicle claim 3 , which satisfies formula 3a: $$1\text{/}\mathrm{8th}\times \mathrm{\lambda }\times \text{k}\le {\text{L}}_{\text{A}}\le 1\text{/}4\times \mathrm{\lambda }\times \text{k}$$

where L _A is a length of the linear element. Window pane assembly for a vehicle according to any one of Claims 1 until 4 , wherein the feeding portion is located outside the heating region in a plan view of the glass plate. Window pane assembly for a vehicle according to any one of Claims 1 until 5 wherein the heating region comprises: a first top side extending along the top edge of the glass sheet; and a second top side spaced farther from the top edge than the first top side and extending along the top edge, and the top portion of the first bus bar extends along the first top side and the second top side. Window pane assembly for a vehicle according to any one of Claims 1 until 6 , wherein the first bus bar further comprises a vertical portion connected to the top portion of the first bus bar, the top portion of the first bus bar is connected to a top side of the heating region, and the vertical portion of the first bus bar is spaced apart from the vertical side of the is heating region and extends along a side edge of the glass plate. Window glass device for a vehicle claim 7 wherein at least a portion of the vertical portion is capacitively coupled to the window frame to which the glass panel is attached. Window glass device for a vehicle claim 8 , which satisfies formula 4a: $$\begin{array}{l}\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \left(2\text{P}-1\right)\times \text{k}\le {\text{D}}_{\text{c}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times (2\text{P}-\\ 1)\times \text{k}\end{array}$$

where D _c is a length of a portion, which is capacitively coupled to the window frame, of the first bus bar, and P is an integer of 1 or greater. Window pane assembly for a vehicle according to any one of Claims 7 until 9 wherein the first bus bar further comprises a horizontal portion connected to the vertical portion, and the horizontal portion extends along the bottom edge of the glass panel in a region spaced from the heating region. Window pane assembly for a vehicle according to any one of Claims 1 until 10 , wherein at least one of the first high-frequency terminal and the second high-frequency terminal is formed on the glass plate. Window pane assembly for a vehicle according to any one of Claims 1 until 11 , wherein at least one of the first high-frequency terminal and the second high-frequency terminal is a terminal of the power supply. Window pane assembly for a vehicle according to any one of Claims 1 until 11 , further comprising a filter for attenuating a high frequency signal having a frequency included in the prescribed frequency range, wherein at least one of the first high frequency port and the second high frequency port is the filter. Window glass device for a vehicle Claim 13 , further comprising a connecting member formed on the glass plate and having one end electrically connected to the first bus bar or the second bus bar and an open end opposite to the one end, the connecting member being formed in a region, which does not overlap with the heating region in a plan view of the glass plate, and one of the first high-frequency terminal and the second high-frequency terminal is the one end. Window glass device for a vehicle Claim 14 , which satisfies formula 5a: $$\left(\mathrm{\lambda }\text{/}4-\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \text{k}\le {\text{L}}_{\text{s}}\le \left(\mathrm{\lambda }\text{/}4+\mathrm{\lambda }\text{/}\mathrm{8th}\right)\times \text{k}$$

where Ls is a length of the link. Window pane assembly for a vehicle according to any one of Claims 1 until 15 , wherein the glass sheet is a laminated glass comprising a first glass sheet, a second glass sheet and an intervening film interposed between the first glass sheet and the second glass sheet, the conductive member being interposed between the first glass sheet and the second glass sheet, the second glass plate has a main surface facing the intermediate film, and the antenna element is formed on the main surface. Window pane assembly for a vehicle according to any one of Claims 1 until 15 , wherein the glass plate is a laminated glass comprising a first glass plate, a second glass plate and an intermediate film which is interposed between the first glass plate and the second glass plate, and the conductive member and at least a part of the antenna element between the first glass plate and the second glass plate are arranged. Window pane assembly for a vehicle according to any one of Claims 1 until 17 , where the prescribed frequency range is a range of DAB Band III.

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