Slot antenna having a slot portion formed in a vehicle mounted insulator
First Claim
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1. A vehicle-mounted antenna, comprising:
- a window glass fitted into an opening of a vehicle body;
a defogger having a plurality of heater lines mounted on the window glass;
a planar conductor provided in a peripheral region of the window glass, the peripheral region surrounding the defogger;
a conductive wire intersecting the plurality of heater lines, the conductive wire being provided in a central region of the defogger in a vehicle body width direction;
a slot portion formed on the window glass in a space between the vehicle body and the planar conductor; and
a feeder line coupled to the vehicle body and the planar conductor,wherein said antenna functions as a slot type antenna which emits radio wave from the slot portion by capacitive coupling of the planar conductor and the defogger.
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Abstract
A conductor is mounted on the window glass of a vehicle in a manner that allows a slot portion between the conductor and the body. A space is allowed within the conductor, and a defogger is mounted within the space. The conductor and the body are fed. This arrangement constitutes a simple structured vehicular slot type antenna on the window glass. The area of the conductor may be reduced by taking advantage of the rear defogger as a conductor.
27 Citations
25 Claims
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1. A vehicle-mounted antenna, comprising:
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a window glass fitted into an opening of a vehicle body; a defogger having a plurality of heater lines mounted on the window glass; a planar conductor provided in a peripheral region of the window glass, the peripheral region surrounding the defogger; a conductive wire intersecting the plurality of heater lines, the conductive wire being provided in a central region of the defogger in a vehicle body width direction; a slot portion formed on the window glass in a space between the vehicle body and the planar conductor; and a feeder line coupled to the vehicle body and the planar conductor, wherein said antenna functions as a slot type antenna which emits radio wave from the slot portion by capacitive coupling of the planar conductor and the defogger. - View Dependent Claims (2, 3, 4)
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5. A vehicle-mounted antenna, comprising:
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a window glass fitted into an opening of a vehicle body; a defogger mounted on the window glass; a planar conductor mounted on the window glass, the planar conductor being provided so as to surround a peripheral region of an area in which the defogger is provided on the window glass; a slot portion disposed between the planar conductor and the body of the vehicle, wherein feeding is performed to both the conductor and the body; a feeder coupled to the vehicle body and the planar conductor; and a slit formed on the planar conductor in a space, wherein said antenna functions as a slot type antenna which emits radio wave from the slot portion by a capacitive coupling of the planar conductor and the defogger. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification