CUTOFF FREQUENCIES OF CIRCULAR WAVE-GUIDE LOADED WITH ECCENTRIC DIELECTRIC CYLINDER

The cutoff frequencies of a conducting circular waveguide loaded eccen trically by a dielectric circular cylinder are calculated, Analytical formulations are developed based on the boundary value method. The cut off wavenumbers are then calculated as roots of the resulting characte ristic determinant, Even and odd hybrid modes are considered and the c utoff frequencies calculated for both cases, Several examples for spec ial cases are introduced for comparison followed by other general exam ples, The case of a dielectric-filled circular waveguide with an eccen tric air core is also examined.