The propagation of electromagnetic waves in ferrite-dielectric structure with metal shield

Abstract

The paper deals with the problem of wave propagation in a rectangular waveguide containing a three-layer ferrite-dielectric-ferrite (FDF) structure located near a metal shield. This FDF structure can be used to create low-cost phased array antennas with simple electrical control of the beam position. However, the calculation of the open FDF structure encounters great difficulties. Placing the FDF structure in a rectangular waveguide allows us to obtain a strict solution for same waveguide wave modes including main mode, which have no dependence of the fields on the coordinate directed along the magnetizing field. This is the main mode of the FDF structure, which determines the general properties of the phased array. It is shown that the obtained relations describe the modes of the open FDF waveguide with high accuracy. The dependences of the mode propagation constants on the magnetizing field have been calculated, the structure of the electromagnetic field for the main and some higher order modes has been found, and the optimal parameters of the structure, which provide maximal controllability by magnetizing field, have been determined.