Antenna feeding circuit

H - Electricity – 01 – Q

Patent

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Details

H01Q 11/08 (2006.01) H01Q 1/36 (2006.01) H01Q 1/38 (2006.01) H01Q 21/00 (2006.01)

Patent

CA 2311331

An object of the present invention is to provide an antenna feeding circuit, which requires no balance-unbalance converter and has a simplified structure. The object is attained, by an antenna feeding circuit, according to the present invention, in which micro-strips lines are constituted from one or more pair(s) of band conductors (5a, 5b) disposed on the outer surface of the cylindrical body (1) and an inner conductor (6) disposed on the whole of the inner surface of the cylindrical body (1). A 180 degree distributor (2) supplies electric power to the band conductors (5a, 5b) so that the phase difference between the currents in,the band conductors (5a, 5b) is 180 degrees, and due to this, inutile current generated in accordance with the connection of the balance and unbalance lines. Inutile current induced in the inner surface of the inner conductor can be cancelled out, because the inner conductor 6 is disposed on the whole of the inner surface of the cylindrical body (1).

L'invention porte sur un circuit d'alimentation d'antenne ne nécessitant pas de transformateur d'équilibrage et de déséquilibrage et ayant une structure simple. Une ligne de microbandes comporte une paire de conducteurs (5a, 5b) sous forme de bandes ménagés sur la surface externe d'un tube (1) et un conducteur (6) interne ménagé sur la surface interne du tube (1). Un circuit (2) de distribution de 180 DEG génère des courants électriques dont les phases présentent une différence de 180 DEG par rapport aux conducteurs (5a, 5b) sous forme de bandes de façon à annuler les courants non désirés produits par connexion d'une ligne d'équilibrage à une ligne de déséquilibrage. Du fait que le conducteur (6) interne soit formé sur la totalité de la surface interne du tube (1), les courants non désirés induits dans la surface interne du conducteur (6) interne s'annulent.

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