EP3570369A1 - Vitre de fenêtre de véhicule automobile - Google Patents

Vitre de fenêtre de véhicule automobile Download PDF

Info

Publication number
EP3570369A1
EP3570369A1 EP18739175.0A EP18739175A EP3570369A1 EP 3570369 A1 EP3570369 A1 EP 3570369A1 EP 18739175 A EP18739175 A EP 18739175A EP 3570369 A1 EP3570369 A1 EP 3570369A1
Authority
EP
European Patent Office
Prior art keywords
antenna element
defogger
vertical
window glass
glass plate
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
EP18739175.0A
Other languages
German (de)
English (en)
Other versions
EP3570369A4 (fr
Inventor
Tatsumi Tokuda
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.)
Nippon Sheet Glass Co Ltd
Original Assignee
Nippon Sheet 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 Nippon Sheet Glass Co Ltd filed Critical Nippon Sheet Glass Co Ltd
Publication of EP3570369A1 publication Critical patent/EP3570369A1/fr
Publication of EP3570369A4 publication Critical patent/EP3570369A4/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/1271—Supports; Mounting means for mounting on windscreens
    • H01Q1/1278—Supports; Mounting means for mounting on windscreens in association with heating wires or layers
    • 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
    • H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30—Arrangements for providing operation on different wavebands
    • H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/342—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes
    • H01Q5/357—Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point
    • H01Q5/364—Creating multiple current paths

Definitions

  • the present invention relates to a vehicle window glass.
  • Devices such as defoggers for removing condensation or ice and antennas for receiving predetermined radio waves may be provided on the surface of a window glass for vehicles (particularly the rear glass) that is to be attached to an automobile.
  • Defoggers have a plurality of horizontal heating wires that extend horizontally across the entirety of the window glass.
  • DAB antenna elements for receiving DAB (Digital Audio Broadcasting; hereinafter "DAB”) broadcasts may be used, for example, and Patent Literature 1 proposes a window glass for vehicles on which a DAB antenna element is provided together with a defogger.
  • DAB Digital Audio Broadcasting
  • Patent Literature 1 JP 2014-216805A
  • the inventor of the present invention found that, with a window glass such as described above, problems such as the following occur. That is, the inventor found that, with a window glass such as described above, a problem occurs in that the reception performance of the DAB antenna element decreases, due to radio waves in the frequency band that should be received by the DAB antenna element being excited as standing waves in the horizontal heating wires . The inventor found such a problem occurs not only with DAB antenna elements but also antenna elements that receive broadcast waves having a wavelength band of a higher frequency than FM, such as digital television broadcast waves, for example.
  • the present invention was made in order to solve the above problem, and an object thereof is to provide a vehicle window glass that is, in the case where an antenna element that receives broadcast waves of a higher frequency band than FM is used together with a defogger, able to suppress a decrease in the reception performance of such an antenna element.
  • a vehicle window glass includes a glass plate, a defogger formed on the glass plate and having a pair of bus bars and a plurality of horizontal heating wires that join the pair of bus bars, at least one vertical element provided in the defogger and intersecting at least one of the horizontal heating wires, and a first antenna element formed on the glass plate and capacitively coupled to the defogger, the first antenna element being configured to receive a broadcast wave having a frequency range of wavelengths ⁇ 1 to ⁇ 2 that is higher than an FM frequency range, and Pmin ⁇ 1 /2 being satisfied, where Pmin is a smallest distance, out of a distance between one of the bus bars and the vertical element and a distance between the vertical antennas, and ⁇ is a shortening coefficient of wavelength of the glass plate.
  • horizontal in the present invention is used to mean a direction generally parallel to the installation surface of the vehicle, and “vertical” refers to a direction generally orthogonal to “horizontal”. Accordingly, “horizontal” and “vertical” do not necessarily indicate strict directions, and, for example, what is referred to as “horizontal” may be slightly inclined rather than being strictly parallel to the installation surface of the vehicle. The meanings of “horizontal” and “vertical” are the same throughout this specification.
  • the vehicle window glass further includes a second antenna element formed on the glass plate and configured to receive a broadcast wave of a higher frequency band than an FM frequency band, the second antenna element being capacitively coupled to the defogger.
  • a configuration can be adopted in which power is supplied to the first antenna element and the second antenna element from a common power supply part.
  • a configuration can be adopted in which a sum of a distance between the vertical element and a power supply part of the first antenna element and a length of the vertical element is greater than or equal to ⁇ 1 /4.
  • a configuration can be adopted in which a sum of a distance between the vertical element and a power supply part of the first antenna element and a length of the vertical element is greater than or equal to ⁇ 2 /4.
  • the first antenna element is configured to receive a DAB broadcast wave, and a distance between the first antenna element and the defogger is less than or equal to 15 mm.
  • a vehicle window glass With a vehicle window glass according to the present invention, it is possible, in the case of using an antenna element that receives broadcast waves of a higher frequency band than FM together with a defogger, to suppress a decrease in the reception performance of such an antenna element.
  • FIG. 1 is a front view of a rear glass of an automobile to which the vehicle window glass according to the present embodiment is applied.
  • the up-down direction in FIG. 1 may be referred to as the up-down direction or the vertical direction
  • the left-right direction in FIG. 1 may be referred to as the left-right direction or the horizontal direction, based on the orientation of FIG. 1 , but this orientation is not intended to limit the invention.
  • a defogger 2 and an FM/DAB shared antenna element 3 are mounted on a glass plate 1.
  • an FM/DAB shared antenna element 3 hereinafter, simply “antenna element”.
  • a well-known glass plate for automobiles can be utilized for the glass plate 1.
  • heat absorbing glass, common clear glass, common green glass or UV green glass may be utilized as the glass plate 1.
  • Such a glass plate 1 needs, however, to realize a visible light transmittance in line with safety standards of the country in which the automobile will be used. For example, solar absorbance, visible light transmittance and the like can be adjusted to meet safety standards.
  • an example of the composition of clear glass and an example of the composition of heat absorbing glass will be shown.
  • the composition of heat absorbing glass can, for example, be given as a composition, based on the composition of clear glass, including total iron oxide in terms of Fe 2 O 3 (T-Fe 2 O 3 ) at a ratio of 0.4 to 1.3 mass%, CeO 2 at a ratio of 0 to 2 mass%, and TiO 2 at a ratio of 0 to 0.5 mass%, and in which the skeletal component (mainly SiO 2 or Al 2 O 3 ) of the glass is reduced by an amount equivalent to the increase in T-Fe 2 O 3 , CeO 2 and TiO 2 .
  • T-Fe 2 O 3 total iron oxide in terms of Fe 2 O 3
  • CeO 2 CeO 2 at a ratio of 0 to 2 mass%
  • TiO 2 at a ratio of 0 to 0.5 mass%
  • the type of glass plate 1 is not limited to clear glass or heat absorbing glass, and is selectable as appropriate according to the embodiment.
  • the glass plate 1 may be a resin window made of acrylic resin, polycarbonate resin or the like.
  • such a glass plate 1 apart from being constituted by a single glass plate, may be a laminated glass in which an intermediate film such as a resin film is sandwiched by a plurality of plates of glass.
  • the shortening coefficient of wavelength ⁇ of a glass plate also changes depending on factors such as the thickness of the glass plate, and is, for example, approximately 0.7 in the case where a defogger, an antenna element and the like are formed on a single glass plate, and approximately 0.5 in the case of a laminated glass in which an intermediate film is sandwiched by two glass plates.
  • the defogger 2 As shown in FIG. 1 , the defogger 2 is disposed in the vicinity of the middle of the glass plate 1 in the vertical direction, and is formed so as to extend across the entirety of the glass plate 1 in the left-right direction. Specifically, this defogger 2 includes a pair of bus bars 21a and 21b for power supply that extend in the up-down direction along both side edges of the glass plate 1.
  • the bus bar on the left side will be referred to as a first bus bar 21a and the bus bar on the right side will be referred to as a second bus bar 21b.
  • a plurality of horizontal elements (horizontal heating wires) 22 are disposed in parallel at a predetermined interval, and heat for defogging is produced by power supply from the bus bars 21a and 21b.
  • two vertical elements 41 and 42 that extend in the up-down direction are formed in this defogger 2.
  • the vertical element on the left side will be referred to as a first vertical element 41
  • the vertical element on the right side will be referred to as a second vertical element 42.
  • These vertical elements 41 and 42 extend so as to link the horizontal element that is uppermost (hereinafter, uppermost horizontal element) 221 and the horizontal element that is lowermost (hereinafter, lowermost horizontal element) 222, so as to intersect all the horizontal elements 22.
  • standing waves constantly occur in the defogger 2, and the wavelength band of these standing waves depends on the length of the horizontal elements 22 of the defogger 2.
  • the antenna element 3 discussed later is disposed near the defogger 2 and this antenna element 3 is capacitively coupled or directly coupled to the defogger 2
  • the inventor found that, if the length of the horizontal elements 22 is half the wavelength ⁇ of broadcast waves that are received by the antenna element 3, or in other words, an integer multiple of ⁇ /2, the antenna element 3 is affected by the standing waves that occur in the defogger 2 (note that ⁇ as referred to here is obtained by multiplying the wavelength by the shortening coefficient of wavelength of the glass plate).
  • the stationary waves can be controlled depending on the length of the divided horizontal elements, or in other words, the intervals of the bus bars 21a and 21b and the vertical elements 41 and 42, and the interval between the adjacent vertical elements 41 and 42, and, as a result, the decrease in the reception sensitivity of the antenna element 3 can be suppressed.
  • reception performance as an antenna decreases and the antenna element 3 no longer functions adequately.
  • a decrease in reception performance can be prevented by adjusting the intervals of the bus bars 21a and 21b and the vertical elements 41 and 42 and the interval between the adjacent vertical elements 41 and 42 to control the frequency of the standing waves .
  • this point will be considered.
  • first interval P1 the interval of the first bus bar 21a and the first vertical element 42 in the horizontal direction
  • second interval P2 the interval of both vertical elements 41 and 42 in the horizontal direction
  • third interval P3 the interval of the second vertical element 42 and the second bus bar 21b in the horizontal direction
  • the vertical elements 41 and 42 are disposed so as to satisfy any of the following equations (1) to (3), where Pmin and Pmax are respectively the smallest and largest of these three intervals, ⁇ 1 to ⁇ 2 are the wavelength bands of DAB broadcast waves that are received by the antenna element 3, and ⁇ is the shortening coefficient of wavelength of the abovementioned glass plate 1.
  • Pmin ⁇ ⁇ ⁇ ⁇ 1 / 2 Pmax ⁇ ⁇ ⁇ ⁇ 1 / 2
  • Equation (1) shows that the smallest interval Pmin, among the intervals of the divided horizontal elements, is smaller than ⁇ 1 /2. Accordingly, at least one interval is smaller than ⁇ 1 /2, among the plurality of intervals, and the decrease in the reception performance of the antenna element due to standing waves is thereby suppressed.
  • Equation (2) shows that the largest interval Pmax, among the intervals of the divided horizontal elements, is smaller than ⁇ 1 /2. Accordingly, all the intervals are smaller than ⁇ 1 /2, and a decrease in the reception performance of the antenna element due to standing waves is thereby suppressed. That is, an improvement in the reception performance becomes further possible over disposition of the vertical elements in equation (1).
  • equation (3) shows that the smallest interval Pmin, among the intervals of the divided horizontal elements, is less than ⁇ 3 ⁇ 1 /8.
  • DAB broadcast waves are mainly taken into consideration, and FM broadcast waves are not taken into consideration.
  • the reasons for this are as follows.
  • the horizontal elements of a typical vehicle are divided at about 0.5 m when one vertical element is provided in the vicinity of the center of the defogger, for example, and is thus considerably shorter than the half wavelength ⁇ /2 of FM broadcast waves. Accordingly, the reception performance of FM broadcast waves tends not to be affected by the standing waves when at least one vertical element is provided.
  • the wavelength of DAB broadcast waves is, as mentioned above, approximately 813 to 1147 mm, and thus reception performance tends to be affected by the standing waves. Accordingly, in the present embodiment, the vertical elements 41 and 42 are provided with consideration for the above interval P, mainly with the object of improving the reception performance of DAB broadcast waves.
  • a length L of the vertical elements 41 and 42 will be considered.
  • the length L of the vertical elements 41 and 42 and a length D from a power supply part 31 to the vertical elements 41 and 42 in the up-down direction are preferably provided so as to satisfy the following equations (4) and (5) .
  • the antenna element 3 is, as mentioned above, used as both an FM antenna and a DAB antenna.
  • the antenna element 3 is configured as follows. First, this antenna element 3 is, in the glass plate 1, disposed upward of the defogger 2, and is provided with the power supply part 31 disposed to the left of the middle of the upper end edge of the glass plate 1.
  • the antenna element 3 is provided with a first vertical part 32 that extends downward from this power supply part 31, and a first horizontal part 33 that extends right-left in the horizontal direction from the lower end of this first vertical part 32, and DAB broadcast waves are mainly received with the first vertical part 32 and the first horizontal part 33.
  • this antenna element 3 has a substantially J-shaped region provided with a second horizontal part 34 that extends toward the left side from partway along the first vertical part 32, a second vertical part 35 that extends downward from the left end of this second horizontal part 34, and a third horizontal part 36 that extends toward the right side from the lower end of the second vertical part 35, and FM broadcast waves are mainly received with this region.
  • the first horizontal part 33 and the third horizontal part 36 are disposed with an interval therebetween in the horizontal direction, and are disposed in substantially the same position in the up-down direction.
  • the first horizontal part 33 and the third horizontal part 36 are respectively disposed at a predetermined interval S from the uppermost horizontal element 221 of the defogger 2.
  • the interval S between the first horizontal part 33 and the uppermost horizontal element 221 is preferably 15 mm or less, and, in particular, is preferably 10 to 15 mm. Since the antenna element 3 and the defogger 2 are capacitively coupled, and the defogger 2 is also utilized as an antenna, reception performance thereby improves.
  • the power supply part of the above antenna element 3 is respectively connected to an FM tuner and a DAB tuner (illustration omitted) via a lead or the like.
  • An amplifier may be inserted upstream of the tuners. Adopting this configuration enables cost reduction. Also, since a DAB/FM antenna is used, the installation area of the antenna element 3 can be reduced.
  • a defogger 2 and antenna element 3 such as described above can be formed by laminating a conductive material having conductivity on the surface of the glass plate 1, such that a predetermined linear pattern is formed.
  • a conductive material having conductivity on the surface of the glass plate 1, such that a predetermined linear pattern is formed.
  • Such a material need only have conductivity, and is selectable as appropriate according to the embodiment, with silver, gold, platinum and the like given as examples.
  • These members can be formed by, for example, printing and baking a conductive silver paste containing silver powder, glass frit and the like on the surface of the glass plate 1.
  • the glass plate 1 of the window glass according to the present embodiment can be shaped by methods such as a press-molding method for shaping the glass plate 1 with a press or a self-weight bending method for bending the glass plate 1 under its own weight.
  • the glass plate 1 is heated to the vicinity of the softening point in a heating furnace. Before being placed in this heating furnace, the glass plate 1 is flat in shape, and a paste for the various materials mentioned above, such as a silver paste, for example, is printed on the surface of this glass plate 1. Then, by placing the glass plate 1 in the heating furnace, the silver paste printed on the glass plate 1 is baked together with shaping the glass plate 1, enabling the defogger 2 and the antenna element 3 to be formed.
  • a paste for the various materials mentioned above such as a silver paste, for example
  • the influence of the standing waves that occur in the defogger 2 can be reduced, and a decrease in the reception performance of the antenna element 3 can be suppressed.
  • the number of vertical elements is not particularly limited, as long as any of the abovementioned equations (1) to (3) is satisfied.
  • the length of a vertical element is also not particularly limited, and the lengths of the plurality of vertical elements may differ.
  • the configuration of the antenna element is not particularly limited.
  • an antenna element for both FM and DAB is used, but separate antennas may be provided.
  • an antenna that receives AM or digital television broadcast waves can be provided.
  • digital television broadcast waves have a short wavelength, similar to DAB broadcast waves, a decrease in reception performance due to the influence of the standing waves can be suppressed, if the vertical elements are disposed so as to satisfy the above equations (1) to (5), with consideration for the wavelength band thereof.
  • only a DAB or digital television antenna that tends to be affected by standing waves may be provided.
  • the shape of the antenna element is not particularly limited, and various shapes are possible. To perform capacitive coupling with the defogger 2, however, horizontal parts that extend along the defogger are preferably provided.
  • the antenna element 3 is not particularly limited in terms of position, and may be disposed on the lower side of the defogger 2. Also, the antenna element 3 may be directly coupled to the defogger 2.
  • the reception performance of the antenna element 3 tends to be affected by the trunk or the rear tray, since the attachment angle of the rear glass approaches horizontal. Accordingly, with a sedan type vehicle, the antenna element 3 is preferably provided upward of the defogger 2. On the other hand, in the case where the attachment angle of the glass approaches vertical, as with a hatchback type vehicle, the reception performance is little affected, since there are no metal portions such as the trunk of a sedan type vehicle. Accordingly, in this case, the antenna element 3 may be provided downward of the defogger 2.
  • window glass according to the present invention is applied to the rear glass of an automobile, but this window glass can also be applied to glass other than the rear glass.
  • the horizontal elements of the defogger are divided by vertical elements.
  • the inventor found that the standing waves that occur in a defogger affect the reception performance of the antenna element, depending on the length of the divided horizontal elements. In view of this, hereinafter, the relationship between the length of the divided horizontal elements and the reception performance will be considered.
  • simulation was executed, after having (1) modeled the vehicle, dielectric body, antenna and the like and set the material, and (2) set an appropriate mesh for the vehicle, dielectric body, antenna and the like. Setting and execution of such simulation are common to consideration of all the working examples and comparative examples shown below.
  • Shortening wavelengths ⁇ 1 to ⁇ 2 corresponding to the DAB frequency range are 813 to 1147 mm, and, therefore, shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 are 406 to 574 mm.
  • shortening wavelengths ⁇ 3 to ⁇ 4 corresponding to the FM frequency range are 1806 to 2566 mm, and, therefore, shortening half wavelengths ⁇ 3 /2 to ⁇ 4 /2 are 903 to 1283 mm.
  • the number and position of the vertical elements were set as follows.
  • the horizontal center position of the defogger is given as 0, and the positions of the first bus bar on the left side and the second bus bar on the right side are respectively defined as -465mm and +465 mm.
  • the vertical elements are disposed between the uppermost horizontal element and the lowermost horizontal element. Note that the length of the divided horizontal element is the interval P described in the above embodiment, and, hereinafter, may thus be simply described as "interval P".
  • Table 1 Num of Vert. Elements Position of Vert. Elements Length of Divided Horiz. Elements (mm) Comp. Ex. 1 0 -465 465 930 Comp. Ex. 2 1 -465 0 465 465 465 Working Ex.
  • Table 2 shows the average value and minimum value of the reception performance in the FM frequency range and the frequency range of DAB band 3 in the above working examples 1 to 5 and comparative examples.
  • Table 2 FM DAB Avg. Min. Value Avg. Max. Value Comp. Ex. 1 -21.5 -26.1 -15.1 -26.2
  • Working Ex. 1 -11.6 -15.3 -17.0 -23.9
  • Working Ex. 2 -11.7 -15.5 -14.6 -22.9
  • Working Ex. 3 -11.6 -15.6 -12.4 -15.4
  • Working Ex. 4 -11.4 -15.4 -14.0 -16.5
  • Working Ex. 5 -11.4 -15.5 -11.9 -15.2
  • FIG. 3 is a graph showing the relationship between the frequencies and reception performance thereof.
  • the reception performances of working example 1 and comparative example 2 in the FM frequency range are generally the same, and are favorable.
  • comparative example 1 has a low reception performance. This is conceivably because, with comparative example 1, the length (interval P) of the divided horizontal elements is 930 mm, and falls within the range (903 to 1283 mm) of the shortening half wavelengths ⁇ 3 /2 to ⁇ 4 /2 corresponding to the FM frequency range. Accordingly, the reception performance is greatly affected by the standing waves.
  • the interval P of comparative example 1 is larger than the shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 (406 to 574 mm) corresponding to the DAB frequency range.
  • the two intervals P in comparative example 2 both fall in the range of the shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 (406 to 574 mm) . Accordingly, comparative examples 1 and 2 both do not satisfy the abovementioned equation (1), and have low reception performances. In particular, the decrease in reception performance near 200 MHz is marked.
  • working example 1 although one of the three intervals P falls in the range of the shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 (406 to 574 mm), the other two intervals P are smaller than this range. Accordingly, working example 1 satisfies the abovementioned equation (1). As a result, the minimum value of reception performance is, as shown in Table 2, higher than comparative examples 1 and 2.
  • working examples 2 and 3 will be considered.
  • the number of vertical elements is four, but the interval P differs. That is, in working example 2, only one (540 mm) of the four intervals P falls in the range of the above shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 (406 to 574 mm). On the other hand, all the four intervals P of working example 3 are lower than the range of the above shortening half wavelengths ⁇ 1 /2 to ⁇ 2 /2 (406 to 574 mm). Accordingly, working example 2 satisfies the above equation (1), and working example 3 satisfies the above equation (2).
  • working examples 2 and 3 have the same reception performance in the FM frequency range, but that, in the DAB frequency range, working example 2 has a decreased reception performance in a frequency range of approximately 180 MHz and below. On the other hand, working example 3 exhibits a high reception performance across the entire DAB frequency range. Also, the reception performance in both frequency ranges is generally higher than comparative example 1.
  • working examples 4 and 5 will be considered together with the abovementioned working example 3.
  • These working examples 4 to 6 have different numbers of vertical elements. That is, in working example 4, the number of vertical elements is three, and the four intervals P satisfy the above equation (3). In working example 3, the number of vertical elements is four, and the five intervals P satisfy the above equation (2). Also, in working example 5, the number of vertical elements is five, and the six intervals P satisfy the above equation (3). The results are as shown in FIG. 5 .
  • both of these working examples satisfy equation (1) and equation (2), and reception performance improves as that the number of vertical elements increases.
  • working example 3 satisfies equation (2) and does not satisfy equation (3), but the reception performance is generally higher than working example 4 that satisfies equation (3). Accordingly, it is noted that, as long as at least equation (2) is satisfied, the reception performance improves as the number of vertical elements increases.
  • the vertical elements are configured to extend downward starting from the uppermost horizontal element, and the number of intersecting horizontal elements in Table 2 shows the number of the horizontal elements not including the uppermost horizontal element.
  • FIG. 6 represents working example 8 (dimensions are as shown in FIG. 2 , and are the same except for the vertical elements).
  • Working examples 6 to 12 all satisfy equation (2) with regard to the interval P, and working examples 6 and 7 do not satisfy equations (4) and (5) relating to the length of the vertical elements.
  • working examples 8 to 12 satisfy the above equation (4), and working examples 11 and 12 satisfies equation (5).
  • working examples 6 to 12 all obtain a high reception performance compared with comparative example 1, and do not have a frequency range in which reception performance is markedly low like comparative example 1.
  • the length of L+D is greater than or equal to ⁇ 1 /4 (203 mm), which satisfies equation (4).
  • working example 12 has an L+D length greater than or equal to ⁇ 2 /4 (287 mm), which satisfies equation (5), and a frequency range in which the reception performance is particularly high.
  • FIGS. 8 to 14 are diagrams in which the current distributions on the defoggers in working examples 6 to 12 are color coded.
  • the frequency is 195 MHz.
  • the areas enclosed by dotted lines show the distribution of current in a range of generally -60 to -30 dB, and the other areas show the distribution of current in a range of generally -30 to 0 dB (the areas are shown with dotted lines since the color coding is difficult to see).
  • the number of areas enclosed by dotted lines on the defogger increases from working example 6 to working example 12.
  • the number of areas in which the current value is low increases in the horizontal elements, and the occurrence of standing waves is suppressed.
  • working example 12 shown in FIG. 14 it is noted that the current value is low in the horizontal elements of the majority of areas, and the occurrence of standing waves is further suppressed.
  • working examples 13 to 17 all obtain a high reception performance compared with comparative example 1, and do not have a frequency range in which reception performance is markedly low like comparative example 1.

Landscapes

  • Details Of Aerials (AREA)
EP18739175.0A 2017-01-11 2018-01-11 Vitre de fenêtre de véhicule automobile Pending EP3570369A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017002945A JP6879744B2 (ja) 2017-01-11 2017-01-11 車両用窓ガラス
PCT/JP2018/000467 WO2018131645A1 (fr) 2017-01-11 2018-01-11 Vitre de fenêtre de véhicule automobile

Publications (2)

Publication Number Publication Date
EP3570369A1 true EP3570369A1 (fr) 2019-11-20
EP3570369A4 EP3570369A4 (fr) 2020-09-02

Family

ID=62839994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18739175.0A Pending EP3570369A4 (fr) 2017-01-11 2018-01-11 Vitre de fenêtre de véhicule automobile

Country Status (4)

Country Link
EP (1) EP3570369A4 (fr)
JP (1) JP6879744B2 (fr)
CN (2) CN114421126A (fr)
WO (1) WO2018131645A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7296540B2 (ja) * 2019-12-27 2023-06-23 Ａｇｃ株式会社 車両用窓ガラス

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10234851A1 (de) * 2002-07-31 2004-02-12 Robert Bosch Gmbh Fahrzeug-Antennenanordnung für den Empfang von LMK-, UKW- und TV-Signalen
JP2006197184A (ja) * 2005-01-13 2006-07-27 Asahi Glass Co Ltd 車両用ガラスアンテナ
US7825865B2 (en) * 2006-12-27 2010-11-02 Asahi Glass Company, Limited Glass antenna for an automobile
JP5109830B2 (ja) * 2007-06-22 2012-12-26 旭硝子株式会社 自動車用高周波ガラスアンテナ及び後部窓ガラス板
WO2010032285A1 (fr) * 2008-09-16 2010-03-25 セントラル硝子株式会社 Antenne de vitre pour véhicule
EP2343773B1 (fr) * 2008-10-02 2018-03-07 Central Glass Company, Limited Antenne pour glace de véhicule
JP2011166487A (ja) * 2010-02-10 2011-08-25 Central Glass Co Ltd 車両用ガラスアンテナ
JP6123457B2 (ja) 2013-04-25 2017-05-10 セントラル硝子株式会社 自動車用ガラスアンテナ
JP6221773B2 (ja) * 2014-01-27 2017-11-01 セントラル硝子株式会社 ガラスアンテナ
JP6221779B2 (ja) * 2014-01-29 2017-11-01 セントラル硝子株式会社 ガラスアンテナ
WO2016190064A1 (fr) * 2015-05-22 2016-12-01 日本板硝子株式会社 Vitre de véhicule et antenne de vitre pour radiodiffusion audionumérique
JP2017005354A (ja) * 2015-06-05 2017-01-05 旭硝子株式会社 車両用ガラスアンテナ及び車両用アンテナを備えた後部窓ガラス

Also Published As

Publication number Publication date
JP2018113591A (ja) 2018-07-19
CN110168806A (zh) 2019-08-23
EP3570369A4 (fr) 2020-09-02
JP6879744B2 (ja) 2021-06-02
WO2018131645A1 (fr) 2018-07-19
CN114421126A (zh) 2022-04-29

Similar Documents

Publication Publication Date Title
US10985438B2 (en) Vehicle window glass
AU2011266380B2 (en) Window-glass antenna for vehicle
JP7365458B2 (ja) 車両用の窓ガラス及びｄａｂ用ガラスアンテナ
EP3680118A1 (fr) Vitre arrière et portière arrière comportant ladite vitre arrière
US10158162B2 (en) Automotive glass antenna
JP2022173525A (ja) 車両用窓ガラス
EP3570369A1 (fr) Vitre de fenêtre de véhicule automobile
EP3321115B1 (fr) Vitre de fenêtre de véhicule
EP3570370B1 (fr) Vitre de fenêtre
EP4113739A1 (fr) Antenne de vitre
US11695194B2 (en) Rear glass
JP6945439B2 (ja) 車両用窓ガラス
US5239303A (en) Wide-band antenna on vehicle rear window glass
US11575192B2 (en) Rear glass
EP3163675B1 (fr) Verre à vitre pour véhicule
US10730483B2 (en) Transparent window plate provided with defogging heat wires
JP6843715B2 (ja) 車両用窓ガラス
JPH10303626A (ja) 車両用のガラスアンテナ
JPH04107003A (ja) 自動車用ガラスアンテナ

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20190805

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
A4 Supplementary search report drawn up and despatched

Effective date: 20200805

RIC1 Information provided on ipc code assigned before grant

Ipc: H01Q 5/364 20150101ALI20200730BHEP

Ipc: H01Q 1/12 20060101ALI20200730BHEP

Ipc: H01Q 1/32 20060101AFI20200730BHEP

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20231016