Waveguide selective devices on resonant diaphragms with complex aperture

The problem of the electrodynamic analysis and synthesis of the waveguide bandpass filters on complex resonant diaphragms is solved. The aperture of diaphragm is a rectangular window with two L-shaped metal ridges. The dependences of transient characteristic of single diaphragm on frequency and aperture geometry are investigated, in particular the possibility of increase of attenuation level in a filters stop-band thanks to existence of full-reflection frequency (anti-resonance) is shown. The results of synthesis of three- and five-resonant filters with a pass-band of 10% are presented.