Wu, QiQiWuSu, WeiWeiSu2021-06-292021-06-292015-08-27European Conference on Antennas and Propagation (EuCAP 2015)http://hdl.handle.net/11420/9816This contribution presents a rigorous method to obtain the eigenmodes of canonical conducting objects. The inner-product definition is used and the dyadic Green's function is expanded by vector wave functions. The expressions for the eigenvalues and normalized eigencurrents of a circular sphere are revisited and used as a benchmark. Numerical errors due to the high frequency and low frequency limitations are discussed.eneigenmodefrequency limitationsvector wave functionConference PaperOther