How to design this filter is a complicated question, and this article will focus on ways to increase the transmission zeros during the design of the Coaxial cavity filters.

In this paper, the problem of the acoustic resonant frequency shift of a cylindrical cavity with a coaxial porous sample is discussed on the basis of the resonance acoustic spectroscopy.

For TEM model in coaxial resonant cavity, the influence of shape and position of inner conductor on electromagnetic field, start-up and steady work was studied.