Resonant antenna

H - Electricity – 01 – Q

Patent

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Details

H01Q 9/04 (2006.01) H01Q 1/24 (2006.01) H01Q 1/38 (2006.01) H01Q 1/40 (2006.01) H01Q 13/08 (2006.01)

Patent

CA 2282611

An antenna for receiving and transmitting electromagnetic microwaves having .lambda. wavelengths consists of a substrate layer (10) made of a low dielectric material which bears on one side a conductive ground plane (1) and whose opposite side is conductively structured as micro-strip circuits. The conductive structure (S) has an elongate conductor section (3, 3a, 3b, R, Ra, Rb) which acts as a resonator and whose length (L R) is shorter than .lambda..epsilon./4. One end of said conductor section is conductively connected to the ground plane (8, 1) and its other end is conductively connected to at least another conductor section (2, 2a, 2b, 4, 42a, 42b, 46a, 46b, K) used as an end capacitor to adjust resonance conditions. The conductor section (3, 3a, 3b, R, Ra, Rb) which acts as a resonator is connected to the inner conductor of a coaxial optical fibre and the outer conductor of the coaxial optical fibre is connected to the ground plane (1).

Ces antennes de réception et d'émission de micro-ondes électromagnétiques ayant des longueurs d'onde lambda comprennent un substrat (10) en un matériau diélectriquement faible qui porte d'un côté un tapis de sol conducteur (1) et dont l'autre côté est constitué d'une structure conductrice sous forme de circuits à micro-bandes. La structure conductrice (S) comprend une section de conducteur allongé (3, 3a, 3b, R, Ra, Rb) qui sert de résonateur et dont la longueur (LR) est inférieure à lambda epsilon /4. Une extrémité de cette section de conducteur est conductivement connectée au tapis de sol (8, 1) et l'autre extrémité est conductivement connectée à au moins une autre section de conducteur (2, 2a, 2b, 4, 42a, 42b, 46a, 46b, K) qui sert de condensateur terminal pour ajuster les conditions de résonance. La section de conducteur (3, 3a, 3b, R, Ra, Rb) qui sert de résonateur est connectée au conducteur interne d'un guide d'ondes coaxial et le conducteur externe du guide d'ondes coaxial est connecté au tapis de sol (1).

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