VEHICLE WINDOW GLASS AND VEHICLE WINDOW GLASS DEVICE

• Main Authors: FUNATSU SATOSHI, TAMURA JIRO
• Format: Patent
• Language: English; Japanese
• Published: 06.05.2021
• Subjects: ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; ELECTRICITY

To enable securing of an antenna gain in a VHF band and defogging.SOLUTION: A vehicle window glass includes a glass plate, a dielectric material having a first surface facing the glass plate and a second surface opposite to the first surface, a planar conductor which is provided between the glass plate and the first surface and has a conductive film and a first bus bar and a second bus bar connected to the conductive film, and at least one power feeding unit provided on the second surface side. The planar conductor generates heat by applying a voltage between the first bus bar and the second bus bar. The power feeding unit faces the planar conductor via the dielectric material and outputs a reception signal of radio waves in at least the VHF band. When the central wavelength of the frequency band of the received radio waves is represented by λ and the wavelength shortening rate of the glass plate is represented by k, the longest distance D1A from the first bus bar to the tip portion of the first extension conductor is 1/8×λ×k or more and 3/8×λ×k or less.SELECTED DRAWING: Figure 1 【課題】ＶＨＦ帯のアンテナ利得の確保と防曇を可能にする。【解決手段】ガラス板と、前記ガラス板に対向する側の第１の面と、前記第１の面とは反対側の第２の面とを有する誘電体と、前記ガラス板と前記第１の面との間に設けられ、導電膜と、前記導電膜に接続される第１のバスバーおよび第２のバスバーと、を有する平面状導体と、前記第２の面の側に設けられる少なくとも一つの給電部と、を備え、前記平面状導体は、前記第１のバスバーと前記第２のバスバーとの間に電圧を印加することによって発熱し、前記給電部は、前記平面状導体に前記誘電体を介して対向し、少なくともＶＨＦ帯の電波の受信信号を出力し、受信する前記電波の周波数帯の中心波長をλ、前記ガラス板の波長短縮率をｋとするとき、前記第１のバスバーから前記第１の延長導体の先端部までの最長距離Ｄ１Ａは、１／８×λ×ｋ以上３／８×λ×ｋ以下である、車両用窓ガラス。【選択図】図１