Rf strip line resonator

Details Rf strip line resonator Rf strip line resonator

H - Electricity

01

P

H01P 7/04 (2006.01) H01P 7/08 (2006.01)

Patent

CA 2198614

RF strip line resonator In order to compensate changes in the resonant frequency of the resonator occurring owing to fluctuations in the distance between the reference distance (d s) and an actual distance (d s~.DELTA.d s) in an RF strip line resonator with a strip line (10) which is arranged at a desired distance (d s) from a metallic conductor (11), the strip line (10) is curved. This curvature induces eddy currents in the conductor (11). The eddy currents bring about a reduction in the inductance of the RF strip line resonator. The smaller/larger the distance between the strip line and the metallic conductor becomes, the smaller/larger this inductance becomes. Since shortening/ lengthening the distance between the two conductors is however also accompanied by an increase/reduction in the capacitance of the RF strip line resonator, with the correct dimensioning of the curved strip line the two aforesaid effects cancel one another out and the frequency of the RF strip line resonator is approximately stable with respect to the given fluctuations in distance.

L'invention concerne un résonateur à ligne triplaque HF comprenant une ligne triplaque (10) placé à une distance théorique (dS) par rapport à un conducteur (11) métallique. Afin de compenser les variations de la fréquence de résonance du résonateur, dues aux fluctuations entre la distance théorique (dS) et une distance réelle (dS+/- DELTA dS), la ligne triplaque (10) est courbée. Cette courbure induit des courants de Foucault dans le conducteur (11), qui réduisent l'inductance du résonateur à ligne triplaque HF. Plus la distance entre la ligne triplaque et le conducteur métallique est faible/importante, plus l'inductance est faible/élevée. Comme le rapprochement/l'éloignement de deux conducteurs augmente/réduit également la capacité du résonateur à ligne triplaque HF, si le dimensionnement de la ligne triplaque courbe est juste, les deux effets s'annulent et le résonateur à ligne triplaque HF est approximativement stable en fréquence par rapport aux fluctuations entre distance théorique et distance réelle.

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