RF planar filter having resonator segments connected by adjustable electrical links

摘要

An adjustable radiofrequency filter in planar technology comprises at least one dielectric substrate and n resonators R1, R2, . . . Ri, . . . Rj, . . . Rk, . . . Rn integrated into the substrate, and each resonator comprises, on a principal plane PL of the substrate, a succession of segments t1, t2, . . . tq, . . . tp of planar transmission lines each having two ends, p being the number of segments of planar transmission lines of the resonator Ri considered, p being equal to or greater than 2, q being the rank of the segment, an end of a segment tq of a resonator Ri being opposite and separated by a distance d from an end of the next segment t(q+1) of the same resonator Ri, the opposite ends of the successive segments of a resonator Rq being linked by an electrical link which locally raises the characteristic impedance of the resonator Ri considered.

主权项

1. An adjustable radiofrequency filter in planar technology comprising:
a dielectric substrate and n resonators R1, R2, . . . Ri, . . . Rj, . . . Rk, . . . Rn integrated into the substrate, wherein each resonator comprises, on a principal plane PL of the substrate, a succession of referenced segments t1, t2, . . . tq, . . . tp of planar transmission lines each having two ends, p being the number of segments of planar transmission lines of the resonator Ri considered, p being equal to or greater than 2, q being a reference to the segment, an end of a segment tq of a resonator Ri being opposite and separated by a distance d from an end of the next segment t(q+1) of the same resonator Ri, the opposite ends of the successive segments of a resonator Ri being linked by an electrical link which locally raises the characteristic impedance of the resonator Ri considered, said electrical link comprising an adjustable element placed between two segment ends of a resonator excluding ends of said resonator.