The analysis of magnetostatic waves in a waveguide using the integral equation method

Magnetostatic volume-wave propagation in a finite-width ferrite slab placed inside and along a rectangular waveguide is investigated theoretically and numerically. Using the integral equation method, the general solution to the problem of wave propagation is derived. The thin-slab approximation makes the derived solution more tractable and provides the dispersion relations in terms of an infinite determinant. The results indicated that in order to obtain high values of group time delay over a large bandwidth, thin, narrow slabs placed in the center of the guide must be used. To maximize the device bandwidth, thin slabs placed at the top or bottom of the guide are most appropriate.<>