Radio communication base station antenna

Details Radio communication base station antenna Radio communication base station antenna

H - Electricity

01

Q

H01Q 1/24 (2006.01) H01Q 1/40 (2006.01) H01Q 15/00 (2006.01) H01Q 19/06 (2006.01) H01Q 19/09 (2006.01) H01Q 21/10 (2006.01) H01Q 21/28 (2006.01)

Patent

CA 2339875

The invention concerns an antenna comprising several primary sources (6A-6C) independently powered and arranged so as to exhibit different radiating characteristics. Said primary sources are placed in a first medium (7A-7C) so as to be spatially decoupled. A second medium (8A-8C) with a substantially lower impedance characteristic than the first medium, covers the first medium. Each primary source has a focusing direction (A-C) perpendicular to the interface between the first and second media, along which the distance (d¿1?) between said primary source and said interface is .lambda.¿1?.(2p¿1?)/4 and the second medium has a thickness (e¿2?) equal to¿ ?.lambda.¿2?.(2p¿2?-1)/4, wherein .lambda.¿1? and .lambda.¿2? represent the wavelengths radiated by said primary source in the first and second media respectively, and p¿1? and p¿2? are integers.

L'antenne comprend plusieurs sources primaires (6A-6C) alimentées de manière indépendante et agencées de façon à présenter des caractéristiques de rayonnement différentes. Ces sources primaires sont placées dans un premier milieu (7A-7C) de façon à être spatialement découplées. Un second milieu (8A- 8C), d'impédance caractéristique sensiblement plus basse que le premier milieu, recouvre le premier milieu. Chaque source primaire a une direction de focalisation (A-C) perpendiculaire à l'interface entre les premier et second milieux, suivant laquelle la distance (d1) entre ladite source primaire et ladite interface est .lambda.1. (2p1-1)/4 et le second milieu a une épaisseur (e2) égale à .lambda.2. (2p2-1)/4, où .lambda.1 et .lambda.2 désignent les longueurs d'onde rayonnées par ladite source primaire dans les premier et second milieux, respectivement, et p1 et p2 sont des entiers.

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