Coupling cavity model for circular cylindrical waveguide with uniform   cross section
  We developed the general approach that gives possibility to calculate the coupling coefficients for arbitrary chain of resonators without using the great number of eigen functions. For understanding this method and having possibility to control the accuracy of obtained results, we applied this procedure for simplest structure that has the analytical solutions - a circular cylindrical waveguide with uniform cross section. 
M. I. Ayzatsky, V. V. Mytrochenko (NSC KIPT, Ukraine)
physics.class-ph physics.acc-ph