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US 6,211,832 B1Granted
Windowpane antenna apparatus for vehicles
AssigneeHarada Industry Co., Ltd.
InventorsHiroshi Endo, Akira Wakui, Michihiko Hashimoto, Masatoshi Saitoh, Mahmood Ahrabian
Life of this patent
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Abstract
A windowpane antenna apparatus for vehicles according to the present invention includes a defogger mounted on a window of a vehicle, for defogging the window, means for causing the defogger to serve as a slot antenna, and a driven antenna arranged close and opposite to the defogger with a given gap therebetween in such a manner that one side of the driven antenna is mutually coupled to one side of the defogger.
Claims4
A windowpane antenna apparatus for vehicles, comprising:
- a defogger, mounted on a window of a vehicle, for defogging the window;
- means for causing the defogger to serve as a slot antenna;
- and
- a driven antenna disposed adjacent to the defogger with a gap therebetween whereby the driven antenna and the defogger are mutually coupled,
- wherein said means for causing the defogger to serve as a slot antenna includes:
- first means for separating the defogger from a power supply voltage application line in a high-frequency manner by interposing an inductance element between each of both ends of the defogger and the power supply voltage application line;
- and
- second means for causing the defogger to serve equivalently as a single metal thin plate for a received wave, said second means being obtained by forming the defogger so as to have a mesh pattern including a plurality of meshes, each of said meshes having a long side that is shorter than the wavelength of the received wave.
5 more elements
Dependencies are inferred from the claim text.