Communications: radio wave antennas – Antennas – With vehicle
Patent
1997-12-05
2000-05-16
Wong, Don
Communications: radio wave antennas
Antennas
With vehicle
343704, H01Q 132
Patent
active
060643455
ABSTRACT:
A glass antenna device for an automobile including a rear window glass sheet; an electric heating type defogger formed on the glass sheet, which is provided with heater strips and positive and negative bus bars for feeding a current to the heater strips; and a noise filter including at least a coil, which is connected between the positive bus bar and a positive terminal of a d.c. power source for the defogger. The negative bus bar is grounded to the automobile body, and antenna conductors are provided in a region in the rear window glass sheet other than the region where the defogger is formed. An antenna conductor element of the antenna conductors extends substantially parallel to the heater strips of the defogger, is more than half in length than a width of the rear window glass sheet, and is located in the range of 15 mm-50 mm apart from an end heating strip of the heating strips of the defogger nearest to the antenna conductor element. The coil has an inductance value in the range of 0.5-10 .mu.H.
REFERENCES:
patent: 4260989 (1981-04-01), Ishii et al.
patent: 5548298 (1996-08-01), Nakase
Nagayama Yoji
Ohnishi Masahiro
Shiina Masaru
Ueda Osamu
Asahi Glass Company Ltd.
Central Glass Company Limited
Clarion Co. Ltd.
Nissan Motor Co,. Ltd.
Phan Tho
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