Waveguide filter on multiresonant diaphragms

Abstract

To increase the steepness of slopes of frequency response of waveguide filters with /spl lambda//4 coupling as resonant tanks, it is possible to use multiresonance diaphragms. A broad spectrum of the highest evanescent types of waves is launched on such diaphragms. For an isolation on the highest modes the additional resonance diaphragms with low-loaded Q-factor are fixed between resonant diaphragms. An example of such a five-section filter on multiresonance is shown.