Field displacement effects in dielectric and ferrite loaded waveguides

A transverse electric field detector is described and some of its limitations are discussed. Using this detector, the field pattern in rectangular waveguide has been measured for varying slab positions, thickness, and dielectric constant. Field distributions for a slab against a side wall have been computed and compare favorably with experiment. Widely varying patterns are achieved even when only a single mode is propagating. The result of mixing two or more modes is also pictured. Similar patterns are round in ferrite loaded waveguides for which the applied magnetic field is an additional variable. The effect of varying the parameters, especially with regard to the nonreciprocal nature of the field patterns, is discussed.