Slow-Wave Propagation in Two Types of Cylindrical Waveguides Loaded with a Semiconductor (Short Papers)

For a parallel-plate waveguide and a microstripline loaded with a semiconductor slab of resistive (or active) character, the complex propagation constant gamma is determined. Gamma is found for higher order branches for microwave and millimeter-wave frequencies between 10 and 140 GHz, representing a study of phase velocity slowing (and attenuation).