Effects of structural misalignments on open coaxial resonator performance

The effects of the misalignment between the inner-rod axis and the outer-wall axis in an open coaxial resonator are simulated by using the software CST microwave studio. The calculated results show that either the parallel misalignment or the oblique misalignment between the inner-rod axis and the outer-wall axis causes substantial decrease of the resonant frequency, the Q-factor, and the field amplitude of the open coaxial resonator; and generally, an oblique misalignment has more adverse influence than a parallel misalignment.