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US 7,742,004 B2Granted
On-vehicle antenna system and electronic apparatus having the same
AssigneePanasonic Corporation
InventorsSusumu Fukushima, Akihiro Hoshiai
Life of this patent
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AssigneePanasonic Corporation
InventorsSusumu Fukushima, Akihiro Hoshiai
Estimating the term…
An on-vehicle antenna system which offers a superior receiving performance, by suppressing reception of reflected/scattered waves coming from inside of the vehicle's cabin; these reflected/scattered waves being an adverse factor which deteriorates signal receiving performance of an antenna. The antenna system is installed at glass pane portion of a vehicle with direction (12) of the greatest radiation pattern (11) directed towards ahead (14) of the vehicle from boundary plane (10) containing power supply portion (9), while direction (13) of the smallest radiation pattern (11) towards behind (15) of the vehicle. The above-configured antenna system can suppress those waves reflected/scattered in the vehicle cabin from being received; as the result, it demonstrates improved characteristics.
An on-vehicle antenna system comprising a vehicle, an antenna for receiving digital signals installed at upper area of the vehicle's glass pane portion, and a propagation path for propagating the digital signals;
An on-vehicle antenna system comprising a vehicle, an antenna for receiving digital signals installed at upper area of the vehicle's glass pane portion, and a propagation path for propagating the digital signals;
An on-vehicle antenna system comprising a diversity antenna, which diversity antenna being formed with at least either one of a first on-vehicle antenna system disposed at the vehicle's glass pane portion with direction of the smallest radiation pattern directed towards behind of the vehicle and a second on-vehicle antenna system disposed at the vehicle's glass pane portion with direction of the smallest radiation pattern directed towards inside of the vehicle cabin with respect to the glass pane.
An on-vehicle antenna system comprising a diversity antenna, which diversity antenna being formed of a first on-vehicle antenna having a radiation pattern with direction of the greatest radiation pattern directed towards ahead or behind of the vehicle while the smallest radiation pattern towards inside of the vehicle's cabin, and a second on-vehicle antenna having a radiation pattern with direction of the greatest radiation pattern directed perpendicular to the vehicle's front—rear direction, or across both sides of the vehicle, while the smallest radiation pattern along the vehicle's front—rear direction.
An electronic apparatus comprising at least either one of a first on-vehicle antenna system installed at glass pane portion of a vehicle with direction of the smallest radiation pattern directed towards behind of the vehicle and a second on-vehicle antenna system installed at the vehicle's glass pane portion with direction of the smallest radiation pattern directed towards inside of the vehicle cabin with respect to the glass pane.
Dependencies are inferred from the claim text.