离散电阻加载的大型垂直极化EMP辐射波模拟器的并行FDTD模拟
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摘要
将电阻设置为跨网格有耗介质,进行离散电阻加载的大型垂直极化电磁脉冲(EMP)辐射波模拟器时域场的并行FDTD模拟.给出不同离散电阻加载方式下模拟器辐射场的时域波形,分析离散电阻加载对模拟器辐射场的影响,并给出离散电阻加载的模拟器有圆筒效应物时的时域波形.结果表明:电阻加载能有效减小模拟器顶端的电流反射,从而改善辐射场的时域波形,但电阻加载也可能会导致模拟器辐射性能的降低;当效应物开孔所在的侧面靠近模拟器且与模拟器极化方向平行时耦合进入圆筒内的电磁波能量较多.计算方法具有通用性,可用于进行离散电阻加载的其它大型垂直极化EMP辐射波模拟器时域场的模拟,包括导电地面存在且有效应物存在时的时域耦合场的模拟.
Parallel FDTD method, by setting resistors as lossy media across grids, is used in time-domain simulation of large vertically polarized electromagnetic pulse(EMP) radiating-wave simulator with discrete resistors. Radiation fields in time-domain with different load-type of discrete resistors are given. Effect of different resistor load is shown. Electric fields in time domain of simulator with discrete resistors and a cylinder effector are presented. It shows that loading discrete resistors improve effectively waveform of radiated electric fields by reducing reflection from simulator's top. However, radiation performance may be weaken as simulators with resistors load. Energy entering into the effector through a square hole is much as the side with hole is near to simulator and parallel with polarized orientation of simulator. The method has general application, and can be used in simulation of time-domain fields of other large vertically polarized EMP radiating-wave simulators with discrete resistors, including simulation of coupling fields as the ground and effectors existing.
Parallel FDTD method, by setting resistors as lossy media across grids, is used in time-domain simulation of large vertically polarized electromagnetic pulse(EMP) radiating-wave simulator with discrete resistors. Radiation fields in time-domain with different load-type of discrete resistors are given. Effect of different resistor load is shown. Electric fields in time domain of simulator with discrete resistors and a cylinder effector are presented. It shows that loading discrete resistors improve effectively waveform of radiated electric fields by reducing reflection from simulator's top. However, radiation performance may be weaken as simulators with resistors load. Energy entering into the effector through a square hole is much as the side with hole is near to simulator and parallel with polarized orientation of simulator. The method has general application, and can be used in simulation of time-domain fields of other large vertically polarized EMP radiating-wave simulators with discrete resistors, including simulation of coupling fields as the ground and effectors existing.
引文
[1] BAUM C E.Review of hybrid and equivalent-electric-dipole EMP simulators[R].Sensor and Simulation,1982.
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[5] BLACKBURN R F,TAYLOR C D.On the electromagnetic fields from a hybrid type of EMP simulator[R].Sensor and Simulation Note 211,November 1975.
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[7] 葛德彪,闫玉波.电磁波时域有限差分方法[M].第三版.西安:西安电子科技大学出版社,2011.
[8] MALONEY J G,SMITH G S.The efficient modeling of thin material sheets in the finite-difference time-domain (FDTD) method[J].IEEE Trans on AP,1992,40(3):323-330.
[9] MALONEY J G,SMITH G S.Optimization of a conical antenna for pulse radiation:An efficient design using resistive loading [J].IEEE Trans on AP,1993,41(7):940-947.
[10] 毛从光,周辉.两种分布加载电磁脉冲天线的FDTD 方法模拟[J].核电子学与探测技,2003,23(4):357-360.
[11] 朱湘琴,王建国,蔡利兵,等.辐射波电磁脉冲模拟器笼形天线辐射特性的并行计算[J].强激光与粒子束,2011,23(6):1597-1601.
[12] KUNZ K S,LUEBBERS R J.The finite difference time domain method for electromagnetic[M].Boca Raton:CRC Press,1993.
[13] 何峰.集总元件FDTD的模拟与研究[D].北京:中国传媒大学,2008.
[14] 田春明,王建国,陈雨生,等.超宽带脉冲横电磁波喇叭的数值模拟[J].微波学报,2002,18(1):52-56.
[15] TIAN C M,WANG J G,CHENG Y S,et al.Numerical studies on two-element TEM horn array for radiating ultrawide band pulses[J].Acta Electronica Sinica,2002,11(4):575-577.
[16] GEDNEY S D.An anisotropic PML absorbing media for FDTD simulation of fields in lossy dispersive media[J].Electromagnetics,1996,16(4):399-415.
[17] 周朝栋,王元坤,杨恩耀.天线与电波[M].西安:西安电子科技大学出版社,2004.
[18] 卢万铮.天线原理与技术[M].西安:西安电子科技大学出版社,2004.
[19] 陈聪,高火涛,秦晨清.超宽带TEM喇叭天线阻抗加载的时域分析[J].现代雷达,2009,11(3):64-66.
[20] 周蔚红,刘培国,何建国.一种近地面工作时域天线特性分析[J].国防科技大学学报,2005,27(1):47-50.
[2] SINGARAJU B K,BAUM C E,DARRAH J H,et al.Use of ATHAMAS II (larger VPD) for testing aircraft in flight[J].ATHAMAS Memos,1976.
[3] BAUM C E.Resistively loaded radiating dipole based on a transmission line model for the antenna[R].Sensor and Simulation Notes,Note 81,April 1969.
[4] BLACKBURN R F,TAYLOR C D.On the electromagnetic fields from a hybrid type of EMP simulator[J].IEEE Tran on Electromagnetic Compatibility,1978,EMC-20(1):240-247.
[5] BLACKBURN R F,TAYLOR C D.On the electromagnetic fields from a hybrid type of EMP simulator[R].Sensor and Simulation Note 211,November 1975.
[6] 刘顺坤,郑振兴,焦杰,等.电磁脉冲模拟器空间场分布的数值模拟[J].强激光与粒子束,1998,10(3):399-402.
[7] 葛德彪,闫玉波.电磁波时域有限差分方法[M].第三版.西安:西安电子科技大学出版社,2011.
[8] MALONEY J G,SMITH G S.The efficient modeling of thin material sheets in the finite-difference time-domain (FDTD) method[J].IEEE Trans on AP,1992,40(3):323-330.
[9] MALONEY J G,SMITH G S.Optimization of a conical antenna for pulse radiation:An efficient design using resistive loading [J].IEEE Trans on AP,1993,41(7):940-947.
[10] 毛从光,周辉.两种分布加载电磁脉冲天线的FDTD 方法模拟[J].核电子学与探测技,2003,23(4):357-360.
[11] 朱湘琴,王建国,蔡利兵,等.辐射波电磁脉冲模拟器笼形天线辐射特性的并行计算[J].强激光与粒子束,2011,23(6):1597-1601.
[12] KUNZ K S,LUEBBERS R J.The finite difference time domain method for electromagnetic[M].Boca Raton:CRC Press,1993.
[13] 何峰.集总元件FDTD的模拟与研究[D].北京:中国传媒大学,2008.
[14] 田春明,王建国,陈雨生,等.超宽带脉冲横电磁波喇叭的数值模拟[J].微波学报,2002,18(1):52-56.
[15] TIAN C M,WANG J G,CHENG Y S,et al.Numerical studies on two-element TEM horn array for radiating ultrawide band pulses[J].Acta Electronica Sinica,2002,11(4):575-577.
[16] GEDNEY S D.An anisotropic PML absorbing media for FDTD simulation of fields in lossy dispersive media[J].Electromagnetics,1996,16(4):399-415.
[17] 周朝栋,王元坤,杨恩耀.天线与电波[M].西安:西安电子科技大学出版社,2004.
[18] 卢万铮.天线原理与技术[M].西安:西安电子科技大学出版社,2004.
[19] 陈聪,高火涛,秦晨清.超宽带TEM喇叭天线阻抗加载的时域分析[J].现代雷达,2009,11(3):64-66.
[20] 周蔚红,刘培国,何建国.一种近地面工作时域天线特性分析[J].国防科技大学学报,2005,27(1):47-50.