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US 6,473,049 B2Granted
Antenna device
AssigneeAsahi Glass Company, Limited
InventorsShoichi Takeuchi, Fuminori Watanabe, Koji Ikawa
Life of this patent
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AssigneeAsahi Glass Company, Limited
InventorsShoichi Takeuchi, Fuminori Watanabe, Koji Ikawa
Estimating the term…
An antenna device of simple structure and high performance which is capable of lessening a reduction of a converging efficiency of radio wave due to a window glass sheet or the like to which the antenna device is fitted, and capable of obtaining a high converging efficiency to a received radio wave. The antenna device comprises a fitted member (5) having transparency, a converging member (1) for converging a radio wave, a space between the fitted member (5) and the converging member (1), and a receiving portion for receiving the radio wave converged by the converging member (1) or a transmitting portion for radiating a radio wave to the converging member (1) wherein in a case that a receive power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space, the thickness of the space is adjusted so that the received power value does not take a value in the vicinity of bottom values.
An antenna device comprising:
An antenna device comprising:
An antenna device comprising:
An antenna device which comprises a flat fitted member having transparency, an antenna member for performing at least one of transmitting a radio wave and receiving a radio wave and a space between the fitted member and the antenna member wherein in a case that a received power value is changed so as to take alternately a bottom value and a peak value depending on a change of the thickness of the space in the relation between the thickness of the space and the received power value in the antenna member, the thickness of the space is adjusted and determined so that the received power value does not take a value in the vicinity of bottom values.
Dependencies are inferred from the claim text.