Transient Radiation by Periodic Structures: Accuracy of the (Time Domain-Floquet Wave)-FDTD Algorithm
Abstract
Transient radiation by periodic structures using a time domain (TD) transmission line network formalism based on the recently developed time-domain Floquet-wave (TD-FWs) is analyzed. The efficiency and the accuracy of the given method depend on the dimension of the finite-difference time-domain (FDTD) computational domain and, on how many FW modes may be used in the signal reconstruction within the frequency range of interest. This paper emphasizes the accuracy problem by numerical analysis of a simple periodic structure whose analytical solution can be easily computed, and a frequency selective surface (FSS).
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