Eigenfrequencies in Microwave Spheroidal Cavities by an Accurate Numerical Approach

We have developed an accurate numerical approach in spherical coordinates for solving electrodynamic tasks such as eigenfrequencies extraction in electromagnetic spheroidal cavities. The main feature of our method is its ability to satisfy the boundary conditions at individual points on a cavity’s perfect electric conductor (PEC) interface. In the present study, we carry out a numerical study to compute the eigenfrequencies in both prolate and oblate type cavities with small aspect ratios. We have compared our results with other techniques and an excellent agreement has been obtained.