Simple dual-frequency antenna

Details Simple dual-frequency antenna Simple dual-frequency antenna

H - Electricity

01

Q

H01Q 5/00 (2006.01) H01Q 1/24 (2006.01) H01Q 1/36 (2006.01) H01Q 9/16 (2006.01) H01Q 9/18 (2006.01) H01Q 9/22 (2006.01) H01Q 9/27 (2006.01) H01Q 21/28 (2006.01) H01Q 21/29 (2006.01) H04B 1/38 (2006.01)

Patent

CA 2226430

An antenna construction comprises a feed conductor (11, 21) and an antenna element (12, 22, 24, 25, 26, 27) which has a first end and a second end. The feed conductor is substantially electrically unshielded and coupled to the antenna element at a tapping point (13, 23) located between the first end and second end of the antenna element, said tapping point dividing the antenna element into two portions having unequal electrical lengths. The antenna element may be a helix (12), a whip (22) or another known two-ended antenna element or a combination of those.

Système d'antenne comprenant un conducteur d'alimentation (11, 21) et un élément d'antenne (12, 22, 24, 25, 26, 27) ayant une première et une deuxième extrémités. Le conducteur d'alimentation est essentiellement sans blindage électrique et couplé à l'élément d'antenne au moyen d'une prise (13, 23) située entre la première et la deuxième extrémités de l'élément d'antenne, ladite prise divisant l'élément d'antenne en deux parties de longueurs électriques inégales. L'élément d'antenne peut être une hélice (12), un fouet (22) ou un autre élément d'antenne à deux extrémités connu, ou encore une combinaison de ces derniers.

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