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An Equivalent Feed Model for the FDTD Analysis of Antennas Driven Through a Ground Plane by Coaxial Lines

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3 Author(s)
Seung-Yeup Hyun ; Imaging Media Res. Center, Korea Inst. of Sci. & Technol., Seoul ; Se-Yun Kim ; Young-Sik Kim

For the finite-difference time-domain (FDTD) analysis of antennas excited by coaxial lines, an equivalent model of the antenna feed is presented here. Under the quasi-static approximation, the coaxial aperture is simply represented as the equivalent magnetic-frill current and the equivalent load circuit including the effects of the coaxial line. It leads us to a simple modification of the standard FDTD update equation at the aperture without any additional cell modeling of the line. The validity of the proposed model is confirmed by comparing of the FDTD results and the measured data.

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Antennas and Propagation, IEEE Transactions on  (Volume:57 ,  Issue: 1 )