Window glass antenna device
First Claim
Patent Images
1. A window glass antenna device comprising:
- an automobile window glass panel;
a dedicated antenna printed on the automobile window glass panel;
a heater antenna comprising a defroster heater pattern disposed on the automobile window glass panel;
a feeder cable for transmitting receiving signals from said dedicated antenna and said heater antenna; and
an impedance transformer for effecting an impedance conversion between said dedicated antenna and said heater antenna, and said feeder cable, said feeder cable having a core and an outer conductor, said impedance transformer comprising a primary winding having a first end connected to said dedicated antenna, said primary winding having a tap connected to said heater antenna, and a secondary winding having a first end connected to said core of said feeder cable, said primary and secondary windings having second ends connected in common with said outer conductor of said feeder cable.
1 Assignment
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Accused Products
Abstract
A window glass antenna device disposed on an automobile window glass panel has a dedicated antenna disposed on the automobile window glass panel, a heater antenna comprising a defroster heater pattern disposed on the automobile window glass panel, and a feeder cable for transmitting received signals from the dedicated antenna and the heater antenna. An impedance transformer for effecting an impedance conversion between the dedicated antenna and the heater antenna, and the feeder cable has a primary winding having an end connected to the dedicated antenna, the primary winding having a tap connected to the heater antenna, and a secondary winding connected to the feeder cable.
32 Citations
7 Claims
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1. A window glass antenna device comprising:
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an automobile window glass panel; a dedicated antenna printed on the automobile window glass panel; a heater antenna comprising a defroster heater pattern disposed on the automobile window glass panel; a feeder cable for transmitting receiving signals from said dedicated antenna and said heater antenna; and an impedance transformer for effecting an impedance conversion between said dedicated antenna and said heater antenna, and said feeder cable, said feeder cable having a core and an outer conductor, said impedance transformer comprising a primary winding having a first end connected to said dedicated antenna, said primary winding having a tap connected to said heater antenna, and a secondary winding having a first end connected to said core of said feeder cable, said primary and secondary windings having second ends connected in common with said outer conductor of said feeder cable. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification