Band pass filter i.e. comb line filter, has set of electromagnetically coupled coaxial resonators, and conductive elements coupled at first resonator after input of filter and/or at last resonator before output of filter

摘要

The filter has a set of electromagnetically coupled coaxial resonators (2), and a set of conductive elements for supplying and/or tapping signals. The conductive elements are coupled at the first resonator after an input of the filter and/or at the last resonator before an output of the filter, where the conductive elements are symmetrical and/or asymmetrical. A coaxial signal source and a symmetrical signal source are connected parallel to each other such that power addition takes place at the filter output between the signal sources.