Abstract: The modal dispersion and cutoff conditions for a W-type plasma loaded circular waveguide are presented. The proposed waveguide has three parts namely the core with higher index, the inner cladding with plasma and outer cladding with air. The dispersion equation is obtained by solving the Maxwell’s equation and matching the field at various interfaces. The graphs for modal characteristics are presented. It is noted as the width of plasma layer increases, the cutoff frequency also increases considerably in all considered case. This analysis shows that the introduction of plasma in waveguide provides additional parameters for controlling the propagation property.

| DOI: 10.17148/IJIREEICE.2022.10114