Helix antenna with a built-in broadband power supply, and...

H - Electricity – 01 – Q

Patent

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Details

H01Q 11/08 (2006.01) H01P 5/18 (2006.01)

Patent

CA 2248853

A resonant helical antenna including at least one helix consisting of at least two radiating wires (111 to 114) printed on a substrate, a miniaturised broadband radiating wire power supply structure printed on said substrate, and at least one hybrid coupler made of semi-localised elements, in order to reduce the size thereof, is disclosed. In the case of a quadrifilar helix consisting of four radiating wires, the power supply structure includes three hybrid couplers, e.g. a first 180~ hybrid coupler (12) connecting a power input and/or output (17) of said antenna to two intermediate outputs and/or inputs (18, 19) phase-shifted through 180~, and two 90~ hybrid couplers (13, 14) each connecting one of said intermediate outputs and/or inputs of said first hybrid coupler to one end of two of said radiating wires. The corresponding manufacturing methods are also disclosed.

L'invention concerne une antenne hélicoïdale résonnante, comprenant au moins une hélice formée d'au moins deux brins rayonnant (11¿1? à 11¿4?) imprimés sur un substrat, comprenant une structure d'alimentation miniaturisée large bande desdits brins rayonnants imprimée sur ledit substrat et comprenant au moins un coupleur hybride réalisé à partir d'éléments semi-localisés, de façon à en réduire les dimensions. Dans le cas d'une hélice quadrifilaire, formée de quatre brins rayonnants, la structure d'alimentation comprend trois coupleurs hybrides, par exemple sous la forme d'un premier coupleur hybride à 180· (12) associant une entrée et/ou sortie d'alimentation (17) de ladite antenne à deux sorties et/ou entrées intermédiaires (18, 19) déphasées de 180·, et de deux coupleurs hybrides à 90· (13, 14) associant chacun l'une desdites sorties et/ou entrées intermédiaires dudit premier coupleur hybride à une des extrémités de deux desdits brins rayonnants. Procédés de fabrication correspondants.

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