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Note on the S11-parameter and input impedance extraction in antenna simulations using FDTD
Jaakko S. Juntunen
Radio Laboratory, Helsinki University of Technology, FIN-02 015 HUT, Finland


Keywords
FDTD; resistive voltage source; S-parameters; input impedance


Abstract
In a resistive voltage source (RVS) formalism, the feed impedance is known to be distorted due to the cell capacitance. In this letter, examples are given showing that the effect of the distortion may be significant. We propose a simple way to derive the S11-parameter without the uncertainty associated with the feed port impedance distortion. Furthermore, the input impedance is shown to be independent of the cell height and source model chosen. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 28: 8-11, 2001.

Microwave and Optical Technology Letters

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