Geodesic
On solving the dispersion relations for waves in guiding electrodynamic structures on the complex planes of wavenumbers
Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 6, pp. 1028-1038

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The problem of solving the dispersion relations for waves in guiding electrodynamic structures on the complex planes of wavenumbers is considered. A method combining the positive features of the Muller method and the phase variation method based on the argument principle is proposed. The implementation of the method is described. For estimating the correctness of the solutions obtained, a new approach employing the convergence to zero of the period-averaged power flux of complex waves is suggested. 
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     author = {V. A. Malakhov and A. S. Raevskii and S. B. Raevskii},
     title = {On solving the dispersion relations for waves in guiding electrodynamic structures on the complex planes of wavenumbers},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {1028--1038},
     publisher = {mathdoc},
     volume = {55},
     number = {6},
     year = {2015},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_2015_55_6_a10/}
}
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V. A. Malakhov; A. S. Raevskii; S. B. Raevskii. On solving the dispersion relations for waves in guiding electrodynamic structures on the complex planes of wavenumbers. Žurnal vyčislitelʹnoj matematiki i matematičeskoj fiziki, Tome 55 (2015) no. 6, pp. 1028-1038. http://geodesic.mathdoc.fr/item/ZVMMF_2015_55_6_a10/