Effect of Geometrical Parameters of H-Plane Conductive Diaphragm on the Behavior of a Rectangular Waveguide

In this paper, the modal analysis is used to study the behavior of a rectangular waveguide loaded with a transversely thin conductive discontinuity. To this end, a function must be made according to the geometry of discontinuity. This function is utilized instead of applying boundary conditions on the plane where the discontinuity is. This equation includes all the necessary boundary conditions simultaneously. The scattering parameters of the structure are related to the coefficients of the Fourier series of the newly defined function. Then, the return loss and insertion loss of different structures are investigated while the geometrical parameters of discontinuity take different values. The behavior of structures can be explained by how dense the coefficients of the Fourier series are. The simulation results show that the error of this technique is less than 2%. This analysis can enable designers to understand how the geometrical parameters of discontinuity affect the scattering parameters for an H-plane inductive diaphragm.

Effect of Geometrical Parameters of H-Plane Conductive Diaphragm on the Behavior of a Rectangular Waveguide Keywords:

Inductive diaphragm , Mode matching method , Rectangular waveguide