CIRCULAR WAVEGUIDE CAVITY AND FILTER HAVING AN IRIS WITH AN ECCENTRIC CIRCULAR APERTURE AND A METHOD OF CONSTRUCTION THEREOF

摘要

A microwave circular waveguide cavity and filter containingsaid cavity has a circular iris mounted transversely withinthe cavity. The iris has an eccentrically located circularaperture that is sized and located to control couplingbetween modes resonating in the cavity. The cavity can bea dual mode cavity, a triple mode cavity or a higher modecavity. In a method of constructing such a cavity,coupling can be controlled by choosing from a number ofvariables including the size of the aperture, the offsetdistance, the inclination angle, the thickness and thelocation of the iris within the cavity.