Experimental design of bandpass frequency response in microwave filters on waveguide slots membranes

Experimental amplitude-frequency characteristics of a single-stage, three-stage and four-stage waveguide-slot microwave filters in the range 5.4 ... 8.5 GHz are presented. The main resonant elements in the filters are metal membranes with L-shaped slots. Three-stage and four-stage filters use two membranes with L-shaped slots, selected by waveguide inserts with experimentally adjustment geometric dimensions. Membranes with L-shaped slots and waveguide inserts are located perpendicular to the direction of propagation of the electromagnetic wave in the waveguide. The possibility of forming bandpass amplitude-frequency characteristics in constructions of the proposed type is shown.