ANALYSIS OF THREE DIMENSIONAL DIELECTRIC LOADED CAVITIES WITH EDGE ELEMENTS

Abstract

In this paper we show that edge elements (a class of mixed finite elements) provide an efficient numerical approach in the determination of resonant modes in three dimensional high frequency cavities. These finite elements avoid "spurious modes", the non-physical numerical fields obtained from the solution of eigenvalue problems. Here, empty cavities as well as dielectric loaded cavities are analyzed: no "spurious mode" was observed. Moreover, comparisons with analytical results and previously published ones show the great accuracy of the numerical technique. [Vol. 6, No. 2, pp. 133-142 (1991)]