(19)
(11) EP 0 411 963 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.05.1991 Bulletin 1991/19

(43) Date of publication A2:
06.02.1991 Bulletin 1991/06

(21) Application number: 90308579.3

(22) Date of filing: 03.08.1990
(51) International Patent Classification (IPC)5: H01Q 1/12
(84) Designated Contracting States:
BE DE ES FR GB IT SE

(30) Priority: 03.08.1989 JP 202008/89

(71) Applicant: NIPPON SHEET GLASS CO., LTD.
Chuo-ku Osaka (JP)

(72) Inventors:
  • Murakami, Harunori, Nippon Sheet Glass Co. Ltd.
    Chuo-ku, Osaka (JP)
  • Oka, Hidetoshi, Nippon Sheet Glass Co. Ltd.
    Chuo-ku, Osaka (JP)

(74) Representative: Jackson, David Spence et al
REDDIE & GROSE 16, Theobalds Road
London, WC1X 8PL
London, WC1X 8PL (GB)


(56) References cited: : 
   
       


    (54) Window antenna


    (57) A pair of antenna conductors (10, 11) are formed on upper and lower blank portions outside an area where defogging heater wires (2) are attached on a window glass (1) of a motor vehicle. One of the antenna conductors (11b) is RF-coupled with the defogging heater wires (2) and a feed terminal (11a) thereof is located at a lateral side of the glass. The other antenna conductor (10) has a feed terminal (10a) located at another lateral side of the glass. The two reception signals complement with each other in directivity due to asymmetric characteristic of the antenna conductors (10, 11) and are used in a diversity reception system for obtaining a nondirectional reception characteristic.







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