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An e-cient wide-band analysis that combines modifled integral equation-physical optics (IE-PO) hybrid formulation with the best uniform approximation is proposed for antennas around an electrically large platform in this paper. The modifled single-level Fast Fourier Transform (FFT) algorithm which is based on the subdomain FFT acceleration is employed by interpolating the Green's function and introducing the concept of the empty groups. Furthermore, the correction of the near- interaction is avoided. On the other hand, the best uniform approximation technique is applied to analyze wide-band properties of antennas. Due to the above modiflcations, the hybrid method needs fewer unknowns and memory requirements than the conventional one.

FAST WIDEBAND ANALYSIS OF ANTENNAS USING IE-PO HYBRID METHOD AND THE BEST UNIFORM APPROXIMATION