Antenna apparatus

H - Electricity – 01 – Q

Patent

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Details

H01Q 9/04 (2006.01) H01Q 1/32 (2006.01) H01Q 1/36 (2006.01)

Patent

CA 2642506

Intended is to provide an antenna device, which can minimize a sensitivity deterioration even at a position as low as 70 mm or less. Inside of an antenna case (10) protruding from a vehicle to a height of 70 mm or less, there is erected and arranged an antenna substrate (30) having an antenna pattern, and there is housed an amplifier substrate (34) for amplifying a received signal outputted from the antenna substrate (30). In this antenna substrate (30), an antenna coil for resonating the antenna pattern with an FM waveband is interposed between the antenna pattern and a feeding point. As a result, the antenna pattern as low as about one twentieth of the wavelength of the FM broadcast resonates with the FM waveband.

L'invention concerne un dispositif d'antenne qui peut minimiser une détérioration de la sensibilité, même à une position aussi basse que 70 mm ou moins. À l'intérieur d'un boîtier d'antenne (10), faisant saillie à partir d'un véhicule à une hauteur de 70 mm ou moins, un substrat d'antenne (30) est dressé et disposé ayant un diagramme d'antenne, et un substrat d'amplificateur (34) est reçu pour amplifier un signal reçu émis à partir du substrat d'antenne (30). Dans ce substrat d'antenne (30), une bobine d'antenne pour faire résonner le diagramme d'antenne avec une bande d'onde FM est interposée entre le diagramme d'antenne et un point d'alimentation. En conséquence, le diagramme d'antenne, aussi bas qu'environ un douzième de la longueur de la diffusion FM, résonne avec la bande d'onde FM.

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