Analytical analysis of inhomogeneous and anisotropic metamaterial cylindrical waveguides using transformation matrix method

Abhinav Bhardwaj, Dheeraj Pratap, Kumar Vaibhav Srivastava and S. Anantha Ramakrishna

Journal of Electromagnetic Waves and Applications, 2023, vol. 37, issue 1, 53-68

Abstract: Several applications of a cylindrical waveguide filled with inhomogeneous materials have been demonstrated. Analytical solutions for modes, an inhomogeneous cylindrical waveguide, are available only for a few material parameters and those are also mostly approximations. We have obtained exact analytical solutions for cylindrical waveguides filled with different inhomogeneous and anisotropic material parameters. Different sets of material parameters are obtained using the geometric transformation method. The analytical and numerical modal field distributions, the value of cutoff frequencies and effective mode indices for different propagating modes are well matched to each other. The inhomogeneity can be used to miniaturize the radial dimensions of the waveguide. This is highly desirable for many applications like sensing, near-field coupling and magnetic resonance imaging (MRI).

Date: 2023
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DOI: 10.1080/09205071.2022.2111607

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