Composite electromagnetic scattering from a two-dimensional （2D） ship-like target on a one-dimensional sea surface is investigated by using the finite-difference time-domain （FDTD） method. A uniaxial perfectly mat...Composite electromagnetic scattering from a two-dimensional （2D） ship-like target on a one-dimensional sea surface is investigated by using the finite-difference time-domain （FDTD） method. A uniaxial perfectly matched layer is adopted for truncation of FDTD lattices.The FDTD updated equations can be used for the total computation domain by choosing the uniaxial parameters properly. To validate the proposed numerical technique,a 2D infinitely long cylinder over the sea surface is taken into account first.The variation of angular distribution of the scattering changing with incident angle is calculated. The results show good agreement with the conventional moment method. Finally,the influence of the incident angle,the polarization,and the size of the ship-like target on the composite scattering coefficient is discussed in detail.展开更多
为了将脉冲成形网络(Pulse Forming Network,PFN)进行模块化集成,更灵活地实现电磁发射系统的扩容与监控,提出了一种基于CAN(Controller Area Network)总线的电磁发射测控系统实现方案;首先根据电磁发射装置的具体要求和CAN总线通信协...为了将脉冲成形网络(Pulse Forming Network,PFN)进行模块化集成,更灵活地实现电磁发射系统的扩容与监控,提出了一种基于CAN(Controller Area Network)总线的电磁发射测控系统实现方案;首先根据电磁发射装置的具体要求和CAN总线通信协议特性,制定了CAN总线应用层通讯协议,开发了基于Visual C#的上位机监控软件,实现了远程监控;然后通过对CAN总线节点固件程序的特殊设计及在高电压、大电流及强磁场极端环境中的电磁兼容设计,保障了总线测控系统的可靠性与安全性;实验结果表明:该测控系统具有网络化、模块化、智能化等优点,为电磁发射系统的模块化集成设计提供了一条新途径。展开更多
基金Project supported by the National Natural Science Foundation of China (Grant No 60571058)the Specialized Research Fund for the Doctoral Program of Higher Education,China (Grant No 20070701010)
文摘Composite electromagnetic scattering from a two-dimensional （2D） ship-like target on a one-dimensional sea surface is investigated by using the finite-difference time-domain （FDTD） method. A uniaxial perfectly matched layer is adopted for truncation of FDTD lattices.The FDTD updated equations can be used for the total computation domain by choosing the uniaxial parameters properly. To validate the proposed numerical technique,a 2D infinitely long cylinder over the sea surface is taken into account first.The variation of angular distribution of the scattering changing with incident angle is calculated. The results show good agreement with the conventional moment method. Finally,the influence of the incident angle,the polarization,and the size of the ship-like target on the composite scattering coefficient is discussed in detail.
