本例取自論文《"A Fast Full-Wave Analysis of Scattering and Radiation from Large Finite Arrays of Microstrip Antennas" by Chao-Fu Wang, Feng Ling,, and Jian-Ming Jin》（Chao-Fu Wang, Feng Ling, and Jian-Ming Jin，IEEE Transactions on Antennas and Propagation 1998.10）。論文中通過采用FFT技術的積分方程方法提高了計算速度。