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ASM–FDTD: A Technique for Calculating the Fieldof a Finite Source in the Presence of an Infinite Periodic Artificial Material


A novel technique is proposed to calculate the field due to an arbitrary impressed source of finite extent in proximity with an infinite periodic structure such as an artificial material. The algorithm is based on a spectral domain finite-difference time-domain (FDTD) method combined with the array scanning method (ASM). Using this approach, only a single periodic cell of the periodic structure needs to be numerically modeled. Examples are used to demonstrate the accuracy and efficiency of the proposed approach. © 2007 IEEE.

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