崔铁军
博士 教授
东南大学 信息科学与工程学院
计算电磁学、快速算法研究、大型军用目标的电磁仿真、电磁逆散射与微波成像、埋地散射体的探测与成像、微波毫米波天线与电路的全波分析、大规模集成电路的封装与互连、信号完整性研究、电磁理论及异向媒质的研究等。
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 姓名：崔铁军
 目前身份：在职研究人员
 担任导师情况：
 学位：博士

学术头衔：
博士生导师， 中国科学院院士， 国家杰出青年科学基金获得者， 国家“百千万”人才工程国家级人选
 职称：高级教授

学科领域：
微波技术
 研究兴趣：计算电磁学、快速算法研究、大型军用目标的电磁仿真、电磁逆散射与微波成像、埋地散射体的探测与成像、微波毫米波天线与电路的全波分析、大规模集成电路的封装与互连、信号完整性研究、电磁理论及异向媒质的研究等。
崔铁军，1965年9月出生，东南大学信息科学与工程学院教授，博士生导师，现任东南大学毫米波国家重点实验室副主任、东南大学目标特性与识别研究所所长。
分别于1987年、1990年、1993年在西安电子科技大学获工学学士、工学硕士、工学博士学位，1993年留校任教。1995年至1997年，获得洪堡奖学金资助，在德国Karlsruhe大学任Research Fellow；1997年至2000年，在美国University of Illinois at Urbana Champaign作博士后研究，2000年至2002年，任该校研究科学家（Research Scientist）。2001年10月被聘为东南大学无线电工程系教授、博士生导师；2003年获得国家杰出青年科学基金。
崔铁军教授在电磁超材料（Metamaterials）和复杂目标及复杂环境电磁散射特性建模方面进行了系统而深入的研究，取得了一批创新性成果。牵头承担了国家自然科学基金重大项目、国家973计划（课题）、863主题项目、国家杰出青年科学基金、教育部“支撑计划”重大项目、教育部“创新引智计划”项目等。获2011年教育部自然科学一等奖、2014年国家自然科学二等奖、2016年中国光学重要成果奖。20142016年连续三次入选爱思维尔电气与电子工程领域中国高被引学者；获国家“百千万人才工程”国家级人选、江苏省先进工作者、江苏省五一劳动奖章、江苏省留学回国先进个人、中国侨联“双百侨界贡献奖”、江苏省第三期“333工程”突出贡献奖、江苏省第四期“333工程”第一层次人选等荣誉。
出版英文专著两部。在国际知名刊物发表论文400余篇，被引用14900余次。研究成果入选2010年中国科学十大进展、2016 年美国光学学会遴选的最激动人心的30 项光学成果、2016 年《中国激光》杂志社遴选的全球光学十大科研突破、2016年国家自然科学基金基础研究十大进展。

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【期刊论文】Causality in the propagation of transient electromagnetic waves in a lefthanded medium
崔铁军， Tie Jun Cui， ， * and Jin Au Kong
PHYSICAL REVIEW B 70, 165113 (2004)，0001，（）：
1年11月30日
Since the concept of lefthanded medium (LHM) was proposed, the causality has been a big concern in the understanding of LHM. Through an exact analysis of a 1D transient current source radiating in a LHM, the causality in the propagation of electromagnetic waves is investigated where three cases are considered for different frequency dispersions in LHM. Numerical experiments have shown that the causality would be violated if the LHM were homogeneous and frequency nondispersive in the whole frequency range or in a certain frequency band. However, such a nondispersive LHM does not exist. For a realistic artificial LHM which is frequency dispersive [Science 292, 77 (2001)], we have shown that the causality is not violated at all.

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【期刊论文】Timedomain electromagnetic energy in a frequencydispersive lefthanded medium
崔铁军， Tie Jun Cui， and Jin Au Kong，
PHYSICAL REVIEW B 70, 205106 (2004)，0001，（）：
1年11月30日
From Maxwell’s equations and the Poynting theorem, the timedomain electric and magnetic energy densities are generally defined in the frequencydispersive media based on the conservation of energy. As a consequence, a general definition of electric and magnetic energy is proposed. Comparing with existing formulations of electric and magnetic energy in frequencydispersive media, the new definition is more reasonable and is valid in any case. Using the new definition and staring from the equation of motion, we have shown rigorously that the total energy density and the individual electric and magnetic energy densities are always positive in a realistic artificial lefthanded medium (LHM) [R. A. Shelby, D. R. Smith, and S. Schultz, Science 292, 77 (2001)], which obeys actually the Lorentz medium model, although such a LHM has negative permittivity and negative permeability simultaneously in a certain frequency range. We have also shown that the conservation of energy is not violated in LHM. The earlier conclusions can be easily extended to the Drude medium model and the cold plasma medium model. Through an exact analysis of a onedimensional transient current source radiating in LHM, numerical results are given to demonstrate that the work done by source, the power flowing outwards a surface, and the electric and magnetic energy stored in a volume are all positive in the time domain.

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崔铁军， Tie Jun Cui a， *， ZhangCheng Hao a， Xiao Xing Yin a， Wei Hong a， Jin Au Kong b
Physics Letters A 323(2004)484494，0001，（）：
1年11月30日
Artificial lefthanded (LH) materials have been realized recently using a twodimensional array of repeated unit cells of conducting rods and split ring resonators. As a consequence, part of electromagnetic energy is stored in the structure, making the equivalent LH material lossy. In this Letter, the propagation of electromagnetic waves in lossy LH materials is investigated. By introducing a small loss, we easily show that the propagating constant in LH materials is negative, and furthermore, the index of refraction is negative. Then the reflection and transmission of a Gaussian beam in a lossy LH half space and a dielectric slab are investigated, where the lossy effect on propagating and evanescent waves has been intensively studied. For the case of LH half space, it is shown that the evanescent waves have been greatly amplified when the loss is small, and can be amplified to infinity when the LH material is lossless. This is a very interesting physical phenomenon where the lossless passive LH half space is an infinite amplifier, producing a physical singularity. In a lossless LH slab, however, the physical singularity is naturally cancelled, and hence such a slab can make a perfect image [Phys. Rev. Lett. 85 (2000) 3966]. For the case of lossy LH slab, a nearlyperfect image can still be obtained when the loss is small due to the amplification of evanescent waves. Numerical simulations are presented to support the above conclusions.
Lefthanded materials， Negative permittivity， Negative permeability， Lossy， Evanescent waves， Physical singularity， Perfect image

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【期刊论文】FastForward Solvers for the LowFrequency Detection of Buried Dielectric Objects
崔铁军， Tie Jun Cui， Senior Member， IEEE， Weng Cho Chew， Fellow， Alaeddin A. Aydiner， Student Member， and Yunhua H. Zhang， Member
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 41, NO.9, SEPTEMBER 2003，0001，（）：
1年11月30日
It is known that the extended Born approximation (ExBorn) is much faster than the method of moments (MoM) in the study of electromagnetic scattering by threedimensional (3D) dielectric objects, while it is much more accurate than the Born approximation at low frequencies. Hence, it is more applicable in the lowfrequency numerical simulation tools. However, the conventional ExBorn is still too slow to solve largescale problems because it requires (2) computational load, where is the number of unknowns. In this paper, a fast ExBorn algorithm is proposed for the numerical simulation of 3D dielectric objects buried in a lossy earth. When the buried objects are discretized with uniform rectangular mesh and the Green's functions are extended appropriately, the computational load can be reduced to (log) using the cyclic convolution, cyclic correlation, and fast Fourier transform (FFT). Numerical analysis shows that the fast ExBorn provides good approximations if the buried target has a small or moderate contrast. If the contrast is large, however, ExBorn will be less accurate. In this case, a preconditioned conjugategradient FFT (CGFFT) algorithm is developed, where the solution of the fast ExBorn is chosen as the initial guess and the preconditioner. Numerical results are given to test the validity and efficiency of the fast algorithms.
Buried objects,， conjugategradient fast Fourier transform (， CGFFT)， algorithm,， cyclic convolution,， cyclic correlation,， fast extended Born approximation,， half space,， lowfrequency numerical simulation.，

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【期刊论文】ThreeDimensional Imaging of Buried Objects in Very Lossy Earth by Inversion of VETEM Data
崔铁军， Tie Jun Cui， Senior Member， IEEE， Alaeddin A. Aydiner， Student Member， Weng Cho Chew， Fellow， D. L. Wright， and D. V. Smith
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 41, NO.10, OCTOBER 2003，0001，（）：
1年11月30日
The very early time electromagnetic system (VETEM) is an efficient tool for the detection of buried objects in very lossy earth, which allows a deeper penetration depth compared to the groundpenetrating radar. In this paper, the inversion of VETEM data is investigated using threedimensional (3D) inverse scattering techniques, where multiple frequencies are applied in the frequency range from 05MHz. For small and moderately sized problems, the Born approximation and/or the Born iterative method have been used with the aid of the singular value decomposition and/or the conjugate gradient method in solving the linearized integral equations. For largescale problems, a localized 3D inversion method based on the Born approximation has been proposed for the inversion of VETEM data over a large measurement domain. Ways to process and to calibrate the experimental VETEM data are discussed to capture the real physics of buried objects. Reconstruction examples using synthesized VETEM data and realworld VETEM data are given to test the validity and efficiency of the proposed approach.
Buried objects,， singular value decomposition (， SVD)， ,， threedimensional imaging,， threedimensional inversion,， Tikhonov regularization,， very lossy earth,， very early time electromagnetic (， VETEM)， data.，

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【期刊论文】A FullWave Model of Wire Structures With Arbitrary Cross Sections
崔铁军， Tie Jun Cui， Senior Member， IEEE and Weng Cho Chew， Fellow， IEEE
IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY, VOL. 45, NO.4, NOVEMBER 2003，0001，（）：
1年11月30日
Transmission lines with rectangular cross sections are usually used in integrated circuit (IC) and computer chip problems. In this paper, a fullwave method is proposed based on an efficient wire model to analyze transmissionline circuits, where the cross sections of wires can be arbitrary. Comparing the existing wire models in the method of moments, it has been shown that the best performance occurs when the current is assumed to flow along the electrical axis of a wire and the testing is on the whole surface if two wires are very close. The physical significance of such modeling implies that the surface current on a wire is equivalent to a current filament along the electrical axis. For a single round wire, the electrical axis is exactly the same as its geometrical axis. For two parallel round wires, the electrical axis of each wire is located at the image position of the other wire. In this paper, a general wire model is proposed to determine electrical axes of wires with arbitrary cross sections by solving a static problem. Then, fullwave formulations are derived for wire structures with rectangular cross sections, which are the most important for IC and computerchip problems. Numerical simulations are given to test the validity and accuracy of the proposed method.
Fullwave analysis,， integrated circuits (， ICs)， ,， looptree basis,， method of moments (， MOM)， ,， rectangular cross section,， transmission line,， wire structures.，

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【期刊论文】An Efficient Multiregion Model for Electromagnetic Scattering and Radiation by PEC Targets
崔铁军， Tie Jun Cui， Senior Member， IEEE， WeiBing Lu， ZhiGuo Qian， Wei Hong， Member， and XiaoXing Yin
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO.7, JULY 2004，0001，（）：
1年11月30日
An efficient multiregion model has been proposed for the fast implementation of the electromagnetic scattering by perfectly electrical conducting (PEC) targets and the radiation of point sources or wire antennas near PEC targets. In the multiregion model, the PEC target under consideration is divided by multiple regions depending on the position of point source/antenna or the incident direction of plane waves. Then the method of moments (MoM) is used on the first region, which is close to the source or is the illuminated region, to obtain the accurate electric current. The mutual coupling between different regions are considered approximately based on the magneticfield integral equation, from which closedform approximations for electric currents on other regions are derived. Because MoM is only performed on the first region, the number of unknowns in the new model is much fewer than that in the full MoM analysis, making the new model much more efficient. Compared with the published hybrid methods, the multiregion model gives a more reasonable physical explanation, and provides a better accuracy in both currents and scattered fields. Numerical simulations for twodimensional (2D) problems (transversemagnetic/transverseelectric) and 3D problems are given to test the validity and efficiency of the proposed modeling.
Electric field integral equation (， EFIE)， ,， hybrid methods,， improved physical optics (， PO)， method of moments (， MoM)， ,， magneticfield integral equation (， MFIE)， ,， method of moments (， MoM)， ,， multiregion model,， scattering and radiation.，

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【期刊论文】Study of Resolution and Super Resolution in Electromagnetic Imaging for HalfSpace Problems
崔铁军， Tie Jun Cui， Senior Member， IEEE， Weng Cho Chew， Fellow， Xiao Xing Yin， Member， and Wei Hong
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO.6, JUNE 2004，0001，（）：
1年11月30日
It has been observed that super resolution is possible in the electromagnetic imaging. In the first part of the paper, the possible resolution of image is investigated in the inversion of farfield data using the diffraction tomographic (DT) algorithm, where two cases are considered when the object is in a homogeneous space and in an airearth half space. The study shows that the resolution of image for inversion of farfield data has been limited theoretically to 0.35360.5 wavelength using the DT algorithm in homogeneousspace problems, and it is even worse in halfspace problems. If the transmitters and receivers are located in the nearfield regime, however, the image resolution is less than 0.25 wavelength, which is the superresolution phenomenon. In the second part of the paper, the physical reason for the superresolution phenomenon is investigated using different electromagnetic inverse scattering methods. The study has demonstrated that the information of evanescent waves in the measurement data and its involvement in inversion algorithms is the main reason for the super resolution. Four inversion algorithms are considered for halfspace problems: the DT algorithm, the spatialdomain Born approximation (BA), the Born iterative method (BIM), and the distorted BIM (DBIM). The first two belong to linear inverse scattering, while the last two belong to nonlinear inverse scattering. Further analysis shows that DBIM provides a better super resolution than BIM, and BIM provides a better super resolution than BA. Numerical simulations validate the above conclusions.
Farfield measurement,， image resolution,， linear inverse scattering,， nearfield measurement,， nonlinear inverse scattering,， super resolution.，

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【期刊论文】New Approximate Formulations for EM Scattering by Dielectric Objects
崔铁军， Tie Jun Cui， Senior Member， IEEE， Weng Cho Chew， Fellow， and Wei Hong， Member
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO.3, MARCH 2004，0001，（）：
1年11月30日
The extended Born approximation (ExBorn) has been shown an efficient formulation in the electromagnetic (EM) scattering by dielectric objects in both freespace and airearth halfspace problems. In most cases, ExBorn is much more accurate than the conventional Born approximation at low frequencies. When the frequency is high or the contrast of dielectric objects is large, however, the ExBorn approximation becomes inaccurate. In this paper, new approximations are proposed for the EM scattering by dielectric objects buried in a lossy earth, which are also suitable for the case of free space. It has been shown that the zerothorder form of new approximations is completely equivalent to ExBorn. Hence, highorder approximations can be regarded as highorder ExBorn. Closedform formulations are derived for the new approximations. Using the fast Fourier transform (FFT), these formulations can be implemented efficiently at a cost of log, where is the number of unknowns and is a small number. Numerical simulations show that highorder ExBorn approximations are much more accurate than the ExBorn approximation.
Born approximation,， buried dielectric objects,， conjugategradient fast Fourier transform (， CGFFT)， algorithm,， extended Born (， ExBorn)， approximation,， highorder approximations,， lowfrequency detection.，

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【期刊论文】Efficient MLFMA, RPFMA, and FAFFA Algorithms for EM Scattering by Very Large Structures
崔铁军， Tie Jun Cui， Senior Member， IEEE， Weng Cho Chew， Fellow， Guang Chen， and Jiming Song
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, VOL. 52, NO.3, MARCH 2004，0001，（）：
1年11月30日
Based on the addition theorem, the principle of a multilevel raypropagation fast multipole algorithm (RPFMA) and fast farfield approximation (FAFFA) has been demonstrated for threedimensional (3D) electromagnetic scattering problems. From a rigorous mathematical derivation, the relation among RPFMA, FAFFA, and a conventional multilevel fast multipole algorithm (MLFMA) has been clearly stated. For very largescale problems, the translation between groups in the conventional MLFMA is expensive because the translator is defined on an Ewald sphere with many sampling K directions. When two groups are well separated, the translation can be simplified using RPFMA, where only a few sampling K directions are required within a cone zone on the Ewald sphere. When two groups are in the farfield region, the translation can be further simplified by using FAFFA where only a single K is involved in the translator along the raypropagation direction. Combining RPFMA and FAFFA with MLFMA, three algorithms RPFMAMLFMA, FAFFAMLFMA, and RPFMAFAFFAMLFMA have been developed, which are more efficient than the conventional MLFMA in 3D electromagnetic scattering and radiation for very large structures. Numerical results are given to verify the efficiency of the algorithms.
Electromagnetic scattering,， fast farfield approximation (， FAFFA)， ,， method of moments,， multilevel fast multipole algorithm,， multilevel raypropagation fast multipole algorithm.，

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