COMPACT WAVEGUIDE FILTER INCLUDING AT LEAST THREE RESONANCE CAVITIES DISPOSED ON BOTH SIDES OF SUBSTRATE

摘要

The invention proposes a filter of the waveguide is particularly compact and easily adaptable to a micro - ribbon. The waveguide filter comprises at least three resonant cavities 14 to 19 coupled to one another. The filter is coupled to a micro - tape placed on a substrate 10. At least one cavity 14, 15, 18 and 19 is located on one side of the substrate 10 and at least one other cavity 16, 17 is located on the other side of the substrate 10. The cavities distributed on either side of the substrate have for effect to greatly reduce the size of the filter. The present invention also relates to an external unit of a transmission including said filter.