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Discrete Green's function formulation of the FDTD method and its application in antenna modeling

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3 Author(s)
Ma, W. ; Queen Mary Coll., Univ. of London, UK ; Rayner, M.R. ; Parini, C.G.

A discrete Green's function formulation of the finite-difference time-domain (DGF-FDTD) method based on both discrete system theory and the FDTD method has been developed, which expresses the field response as a convolution of current sources and the impulse response of the FDTD equation system. The DGF-FDTD method presents the FDTD equations in a different perspective from the conventional Yee algorithm. It avoids the computational difficulties such as the need for computation of free-space nodes and absorbing boundary conditions of the classic FDTD method. The ability of the DGF-FDTD method to model on antenna is demonstrated by the modeling of a Yagi-Uda array antenna with considerable saving in memory usage.

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Antennas and Propagation, IEEE Transactions on  (Volume:53 ,  Issue: 1 )