| Citation: | XIONG Ying, LI Xiaojian, WANG Tiannan, et al. FDTD method for periodic structure based on INBC[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(1): 31-37. doi: 10.13700/j.bh.1001-5965.2020.0002(in Chinese)
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In order to solve the problem of electromagnetic characteristic parameters of periodic structures, an INBC-FDTD calculation method based on network analysis method and vector fitting method is:introduced in this paper, which can be used to quickly solve the electromagnetic characteristic parameters of low-profile periodic structures.In this method, the two-port frequency domain impedance parameter curve of the metal layer is firstly fitted with rational fractions by the vector fitting method, and then the time domain transform is carried out to embed the FDTD formula to complete the update of the electric field and the magnetic field. The proposed method fully considers electro-magnetic fields transmitted in the metal layer, and its two-port network impedance parameter fully considers the mutual coupling between the ports.
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