The equivalent expression of dyadic Green's function for chirowaveguide

A method of formulating eigenfunction expansion of dyadic Green's function in lossless reciprocal and homogeneous chirowaveguides is given,using this method, the non-divergence vector potential equation can be transformed into that similar to achiral media, the corresponding wavefield decomposition is used to obtain the vector wave function. A specific application to the analytic solution of electromagnetic wave propagation in rectangular chirowaveguide illustrates the method.