All-around vehicle antenna apparatus
First Claim
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1. An all-around vehicle antenna apparatus comprising:
- a vehicle window having a metal window frame in which a translucent member is fitted;
a defogger for defogging the vehicle window, the defogger being provided on the translucent member of the vehicle window with a gap serving as a slot having a width between an outer circumference of the defogger and an inner circumference of the metal window frame;
first means for causing the slot to function as a slot antenna element;
a plurality of thin-film conductor pieces arranged in such a manner that at least part of each conductor piece is inserted into the slot;
second means for causing the plurality of thin-film conductor pieces to function as plural-wave-receivable antenna elements having a specific relationship with the slot antenna element and excited in response to radio waves of plural specific frequencies; and
a straight, belt-shaped thin-film conductor formed between an upper side of the defogger and an upper side of the metal window frame and in parallel with the upper side of the metal window frame wherein the straight, belt-shaped thin-film conductor includes a plurality of small-sized slot antenna elements excited in response to a radio wave having a specific frequency.
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Abstract
In an all-around vehicle antenna apparatus according to the present invention, a window frame of a vehicle window is made of metal, a thin-film conductor is formed on the surface of a translucent member (e.g., glass) of the vehicle window to form a slot between the window frame and thin-film conductor, and the slot functions as a slot antenna element. A plurality of thin-film conductor pieces are arranged such that at least part of the pieces is inserted into the slot so as to have a specific relationship with the slot antenna element, and thus the thin-film conductor pieces serve as a plural-wave-receivable antenna element adapted to a specific frequency.
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Citations
6 Claims
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1. An all-around vehicle antenna apparatus comprising:
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a vehicle window having a metal window frame in which a translucent member is fitted;
a defogger for defogging the vehicle window, the defogger being provided on the translucent member of the vehicle window with a gap serving as a slot having a width between an outer circumference of the defogger and an inner circumference of the metal window frame;
first means for causing the slot to function as a slot antenna element;
a plurality of thin-film conductor pieces arranged in such a manner that at least part of each conductor piece is inserted into the slot;
second means for causing the plurality of thin-film conductor pieces to function as plural-wave-receivable antenna elements having a specific relationship with the slot antenna element and excited in response to radio waves of plural specific frequencies; and
a straight, belt-shaped thin-film conductor formed between an upper side of the defogger and an upper side of the metal window frame and in parallel with the upper side of the metal window frame wherein the straight, belt-shaped thin-film conductor includes a plurality of small-sized slot antenna elements excited in response to a radio wave having a specific frequency. - View Dependent Claims (2, 3, 4, 5)
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6. An all-around vehicle antenna apparatus comprising:
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a vehicle window having a metal window frame in which a translucent member is fitted;
a defogger for defogging the vehicle window, the defogger being provided on the translucent member of the vehicle window with a gap serving as a slot having a width between an outer circumference of the defogger and an inner circumference of the metal window frame;
first means for causing the slot to function as a slot antenna element;
a plurality of thin-film conductor pieces arranged in such a manner that at least part of each conductor piece is inserted into the slot;
second means for causing the plurality of thin-film conductor pieces to function as plural-wave-receivable antenna elements having a specific relationship with the slot antenna element and excited in response to radio waves of plural specific frequencies; and
a straight, belt-shaped thin-film conductor formed between an upper side of the defogger and an upper side of the metal window frame and in parallel with the upper side of the metal window frame wherein the straight, belt-shaped thin-film conductor includes an auxiliary device having at least an amplifier circuit.
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Specification