In order to deri¨e closed-form expressions of Green's functions for the¨ector and scalar potentials of a horizontal magnetic dipole in a parallel-plate wa¨eguide filled with a homogeneous dielectric, an impro¨ed complex image method based on the two-le¨el approximation is considered in conjunction with the use of Prony's method. The results for the e¨aluation of the closed-form Green's functions obtained ( ) by the present method two-le¨el approximation are compared with ( ) those obtained by the pre¨ious method one-le¨el approximation . The present method is obser¨ed to gi¨e more accurate results than the pre¨ious method o¨er the wide frequency range as well as the whole spatial range.
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