CAJ | 학술논문

讨论了应用时域积分方程方法分析宽带电磁散射问题的精度问题,研究了选择不同的时域基函数对表面感应电流、散射远场和雷达截面的精度的影响.数值结果表明:对于封闭的散射体,必须使用组合场积分方程来消除内部共振;虽然时域感应电流和散射远场看起来很精确 ,但雷达截面有明显误差,这意味着雷达截面是检验精度的最好物理量. 关键词时域积分方程;时域基函数;宽带散射;精度分析
토론료응용시역적분방정방법분석관대전자산사문제적정도문제,연구료선택불동적시역기함수대표면감응전류、산사원장화뢰체절면적정도적영향.수치결과표명:대우봉폐적산사체,필수사용조합장적분방정래소제내부공진;수연시역감응전류화산사원장간기래흔정학 ,단뢰체절면유명현오차,저의미착뢰체절면시검험정도적최호물리량. 관건사시역적분방정;시역기함수;관대산사;정도분석
The accuracy of time domain integral equation (TDIE) methods for broadband elect romagnetic scattering problems is studied. The impacts of different choice of temporal basis functions on the accuracy of the induced surface current,scattered farfield and radar cross-section (RCS) are examined. Numerical results show that: for closed scatterers,time domain combined field integral equations (TDCF IE) must be employed to suppress the resonant disturbance; whereas the induced c urrents and farfields in time domain look accurate,the RCS defined in frequency domain may deviate obviously,which suggests that RCS could be the best quantity for accuracy checking.