TE-type Natural Complex Oscillations in 2D Arbitrarily Shaped Slotted Cavities

Studies of the natural complex oscillations in 2D slotted cavities of arbitrary shapes are pivotal in the prediction of the resonance response from variously shaped jet engine intakes. The complex eigenvalues of these oscillations can also be regarded as cut-off relative wave numbers bf the short-circuited waveguides. This circumstance makes studies on this subject even more relevant. These studies are based on the non-trivial rigorous solution of the scattering problem for perfectly electrically conducting (PEC) slotted cavities of arbitrary shape, excited by an obliquely incident H-polarized plane wave (see Fig.1).