Use of web-splines for waveguide of arbitrary domain

This paper illustrates web-splines and their implementations for electromagnetic problems such as waveguide of arbitrary domain. The cutoff wave numbers of modes for the coaxial waveguides are studied for illustrating the two dimensional concept. The numerical results have been compared with the analytical results. The significance of web-splines is that the number of nodes and computing time is reduced and instability problem is solved by using web-splines. The analyses presented in this study show the suitability of proposed method to complex electromagnetic problems. The finite element method which uses web-splines is applied to coaxial waveguides. With different ratio of radius of coaxial waveguides, accurate results are obtained by using web-splines. Web-splines and extended b-splines are used to find the wave number of TM and TE mode respectively.