Analysis of Wideband Scattering from Antenna Based on RFGG-FG-FFT with Cube Polynomial Inter/Extrapolation Method

Abstract

This paper presents an efficient real-coefficient fitting both Green’s function and its gradient with Fast Fourier Transform (RFGG-FG-FFT) with cube polynomial inter/extrapolation method (CPIE), which is established for the analysis of scattering from antenna over a wide frequency. To improve the computation efficiency, the CPIE is utilized. In order to reduce memory requirements and accelerate matrix vector multiplication, the RFGG-FG-FFT is adopted. The accuracy, correctness and efficiency of the new method are researched on some examples. Compared with the direct method, the examples show that the new method is superior in broadband without loss of accuracy.

RCS Prediction Using Prony Method in High-Frequency Band for Military Aircraft Models

“…The low-frequency scattering analysis approach is capable of producing reliable analysis results; however, the analysis timetends to grow as the frequency increases. The error rate in high-frequency scattering analysis grows in the dB scale rather than the linear scale as compared to low-frequency scattering analysis [4][5][6][7][8][9][10][11][12][13][14][15].…”

“…It is feasible to determine the value of a i and b i from the system function y(k), which is a real number that satisfies the P and Q orders as in Equation (13).…”