COUPLING ARRANGEMENT

摘要

The present invention relates to a coupling arrangement for coupling of a signal to a centre conductor in a cavity filter such that a stable coupling can be achieved where the coupling factor between said conductors is adjustable even after a complete assembly of the filter. The coupling arrangement includes one or more means for trimming of the coupling factor, e.g. a trimming screw, that are arrangend in the space between coupling conductor and centre conductor. An adjustment of the coupling factor is achieved by means of adjusting the degree to which a part of the trimming means protrudes into the space between said conductors.