EP3570370B1 - Window glass - Google Patents

Window glass Download PDF

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Publication number
EP3570370B1
EP3570370B1 EP18739438.2A EP18739438A EP3570370B1 EP 3570370 B1 EP3570370 B1 EP 3570370B1 EP 18739438 A EP18739438 A EP 18739438A EP 3570370 B1 EP3570370 B1 EP 3570370B1
Authority
EP
European Patent Office
Prior art keywords
antenna
defogger
working example
power supply
window glass
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.)
Active
Application number
EP18739438.2A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3570370A1 (en
EP3570370A4 (en
Inventor
Kosuke Tanaka
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 EP3570370A1 publication Critical patent/EP3570370A1/en
Publication of EP3570370A4 publication Critical patent/EP3570370A4/en
Application granted granted Critical
Publication of EP3570370B1 publication Critical patent/EP3570370B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/28—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04—Resonant antennas
    • H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole

Definitions

  • the shortening coefficient of wavelength ⁇ of a glass plate also changes depending on factors such as the thickness of the glass plate, being 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, for example, and more specifically, changes in the following manner, depending on the frequency of the broadcast waves to be received and the thickness of the glass plate.
  • the shortening coefficients of wavelength in the following Table 1 are, however, given as examples, and can also change depending on other conditions.
  • the auxiliary element 5 is connected within a range of 150 mm toward the right side and 150 mm toward the left side, and more preferably within a range of 100 mm toward the right side and toward 100 mm toward the left side, centered on this origin.
  • the vertical elements 41 to 43 are preferably disposed so as to satisfy any of the following equations (1) and (2), where Pmin is the smallest of these four intervals, ⁇ 1 to ⁇ 2 are the wavelength bands of DAB broadcast waves that are received by the DAB antenna 3, and ⁇ is the shortening coefficient of wavelength of the abovementioned glass plate 1.
  • Pmin ⁇ ⁇ ⁇ ⁇ 1 / 2
  • working example 1 generally shows a high reception performance in all frequency ranges compared with comparative examples 1 and 2.
  • a reception performance that is much higher than comparative examples 1 and 2 is shown. Accordingly, it is noted that the reception performance increases when the two antenna elements are both capacitively coupled to the defogger.
  • the average of the reception sensitivities in the DAB frequency range was -5.9 dBd for working example 1, -7.8 dBd for comparative example 1, and -7.8 dBd for comparative example 2.
  • the average of the reception sensitivities in the DAB frequency range was -6.6 dBd for working example 3, -6.1 dBd for working example 4, -5.9 dBd for working example 5, -6.2 dBd for working example 6, -6.5 dBd for working example 7, and -6.8 dBd for working example 8.
  • connection position of the auxiliary element and the lowermost horizontal element was evaluated.
  • the first region of the auxiliary element is connected in the vicinity of the bus bar on the left side, and, as shown in the following Table 3, working examples 12 to 14 in which the connection position of the first region of the auxiliary element was changed were prepared, and the reception performances were calculated.
  • the connection position is shown with the bus bar on the left side as the origin, and with the right side as plus from that position.
  • Table 3 Position from Left Bus Bar Working Example 10 50 mm Working Example 12 100 mm Working Example 13 150 mm Working Example 14 200 mm

Landscapes

  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
EP18739438.2A 2017-01-11 2018-01-11 Window glass Active EP3570370B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017002868A JP6868396B2 (ja) 2017-01-11 2017-01-11 窓ガラス
PCT/JP2018/000480 WO2018131647A1 (ja) 2017-01-11 2018-01-11 窓ガラス

Publications (3)

Publication Number Publication Date
EP3570370A1 EP3570370A1 (en) 2019-11-20
EP3570370A4 EP3570370A4 (en) 2020-08-12
EP3570370B1 true EP3570370B1 (en) 2023-06-07

Family

ID=62839558

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18739438.2A Active EP3570370B1 (en) 2017-01-11 2018-01-11 Window glass

Country Status (4)

Country Link
EP (1) EP3570370B1 (ja)
JP (1) JP6868396B2 (ja)
CN (1) CN110168805A (ja)
WO (1) WO2018131647A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019043453A (ja) * 2017-09-05 2019-03-22 日本板硝子株式会社 リアガラス及びリアガラスを有するバックドア
JP7296540B2 (ja) * 2019-12-27 2023-06-23 Ａｇｃ株式会社 車両用窓ガラス

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5099837U (ja) * 1974-01-14 1975-08-19
JP2000252732A (ja) * 1999-02-25 2000-09-14 Asahi Glass Co Ltd 自動車用ガラスアンテナ
JP5655522B2 (ja) * 2010-11-24 2015-01-21 旭硝子株式会社 車両用アンテナ装置
WO2015137108A1 (ja) * 2014-03-12 2015-09-17 旭硝子株式会社 自動車用ガラスアンテナ
US20180123219A1 (en) * 2015-04-28 2018-05-03 Nippon Sheet Glass Company, Limited Glass antenna
WO2016190064A1 (ja) 2015-05-22 2016-12-01 日本板硝子株式会社 車両用の窓ガラス及びｄａｂ用ガラスアンテナ
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
EP3570370A1 (en) 2019-11-20
EP3570370A4 (en) 2020-08-12
JP6868396B2 (ja) 2021-05-12
JP2018113587A (ja) 2018-07-19
WO2018131647A1 (ja) 2018-07-19
CN110168805A (zh) 2019-08-23

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