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US 4,439,771 AGranted
Glass antenna system for an automobile
AssigneeAsahi Glass Company, Limited
InventorsMasaharu Kume, Kenichi Ishii, Takayasu Hokusho
Life of this patent
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AssigneeAsahi Glass Company, Limited
InventorsMasaharu Kume, Kenichi Ishii, Takayasu Hokusho
Estimating the term…
A glass antenna system for an automobile comprises a main antenna disposed at an upper part of a glass plate for a rear window of the automobile and a defogging electric heating element disposed below and separate from the main antenna and comprising a plurality of heating strips and a pair of bus bars for supplying electricity to the heating strips. The glass antenna system is characterized in that a lead wire is connected to a predetermined portion of the lower most heating strip among said heating strips and a feeding point for connection to an antenna feeder line is provided on the lead wire, whereby the defogging electric heating element constitutes a subsidiary antenna having a directivity different from the directivity of the main antenna.
A glass antenna system for an automobile which comprises a main antenna disposed at an upper part of a glass plate for a rear window of the automobile, said main antenna being connected to a first antenna feeder line, a defogging electric heating element disposed below and separate from the main antenna and comprising a plurality of heating strips, a pair of bus bars for supplying electricity to the heating strips, a lead wire connected to a predetermined portion of the lowermost of said heating strips, a feeding point for connection to an antenna feeder line provided on the lead wire, and a second antenna feeder line connected to said feeding point whereby the defogging electric heating element constitutes a subsidiary antenna having a directivity different from the directivity of the main antenna.
Dependencies are inferred from the claim text.