Double antenna, especially for vehicles

Details Double antenna, especially for vehicles Double antenna, especially for vehicles

H - Electricity

01

Q

H01Q 1/32 (2006.01) H01Q 5/02 (2006.01) H01Q 9/16 (2006.01) H01Q 9/30 (2006.01) H01Q 21/30 (2006.01)

Patent

CA 2225368

The invention relates chiefly to double antennas for metric and decimetric waves, designed for vehicles. The antenna comprises a single-pole antenna for low frequencies surmounted by a dipole type antenna for high frequencies. The supply cable of the dipole antenna has an external conductor used to form the single-pole antenna above the ground plane. Beneath the ground plane, this external conductor is wound in turns to constitute the secondary winding of a transformer for the supply of the single-pole antenna. Application especially to ground vehicles.

Cette invention se rapporte particulièrement à des antennes doubles pour des ondes métriques et décimétriques, conçues pour des véhicules. L'antenne est composée d'une antenne unipolaire pour les basses fréquences surmontée d'une antenne de type doublet pour les hautes fréquences. Le câble d'alimentation de l'antenne doublet a un conducteur externe utilisé pour former l'antenne unipolaire au-dessus du tapis de sol. Sous le tapis de sol, ce conducteur externe est bobiné pour former l'enroulement secondaire d'un transformateur servant à l'alimentation de l'antenne unipolaire. Application principalement aux véhicules terrestres.

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