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Waves in linear time-varying dielectric media

Sotoodehfar, A ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. Publisher: Institute of Electrical and Electronics Engineers Inc , 2022
  3. Abstract:
  4. In this paper, focusing on the frequency domain, we write the constitutive relation and the Helmholtz equation for linear, dispersive, and inhomogeneous time-varying media. Next, by assuming spatial homogeneity, we simplify the equations and explain how to calculate dispersion curves (the angular frequency with respect to the wave vector) for propagating waves. Furthermore, we show that under the simplifying assumption of instantaneous response, the developed general approach provides the same dispersion curves as reported earlier for the dispersion-less model of time-varying dielectric media. We believe that this study is important for investigations of wave phenomena in time-varying media, properly taking into account inevitable frequency dispersion of materials. © 2022 European Association for Antennas and Propagation
  5. Keywords:
  6. Time-varying dispersive media ; Frequency domain analysis ; Complex permittivity ; Dispersion curves ; Dispersive media ; Frequency domains ; Linear time varying ; Temporal complex permittivity ; Time varying ; Time-varying dielectric mediums ; Time-varying dispersive medium ; Time-varying medium ; Dispersion (waves)
  7. Source: 16th European Conference on Antennas and Propagation, EuCAP 2022, 27 March 2022 through 1 April 2022 ; 2022 ; 9788831299046 (ISBN)
  8. URL: https://ieeexplore.ieee.org/document/9769601?denied