Ji Chen
Dr. Ji Chen
Office Location: W442A, Engineering Bldg 2
Phone: 713-743-4423 | Fax: 713-743-4444
Email: jchen18 [at] uh [dot] edu


BS Electrical Engineering, Huazhong University of Science and Technology
MS Electrical Engineering, McMaster University, Canada
PhD Electrical Engineering, University of Illinois, Urbana-Champaign

Professional Experience: 

Staff engineer at Motorola Personal Communication Research Labs in Chicago, 1998-2001

Awards & Honors: 

IEEE EMC Society Technical Achievement Award, 2011
IEEE EMC Society Distinguished Lecturer, 2009-2010
IEEE APMC 2008 Best Paper Award
IEEE Senior Member, 2008
ORISE Fellowship, 2006
Motorola Engineering Award, 2000

Research Interests: 

Biomedical instrumentation: Multi-channel TMS devices, MRI high frequency coil designs, RF front ends for biosensors, on-body area network modules, wireless energy transfer devices

Wireless communications physical layer design : Channel modeling. diversity antenna design and analysis

Nano-scale structures with non-scaling phenomenon : Periodic structures at infrared, optical and UV wavelength

VLSI CAD : interconnect/substrate modeling for mixed-signal SOC

Selected Publications: 

Z. Liu, Y. Qi, F. Li, W. Yu, J. Fan and J. Chen, "Fast Band-Sweep Total Isotropic Sensitivity Measurement," in IEEE Transactions on Electromagnetic Compatibility, vol. 58, no. 4, pp. 1244-1251, Aug. 2016

10. Xichen Guo; Jackson, D.R.; Ji Chen "A Semianalytical Model for Vias With Arbitrarily Shaped Antipads Based on the Reciprocity Theorem", Microwave Theory and Techniques, IEEE Transactions on, On page(s): 3239 - 3248 Volume: 62, Issue: 12, Dec. 2014

J E. McGary, Z. Xiong Z, J. Chen, “Magnetic tracking for TomoTherapy systems: gradiometer based methods to filter eddy-current magnetic fields,” Med Phys. 2013 Jul;40(7):071705. doi: 10.1118/1.4808148.

Dawei Li, Xiaohe Ji, Jianfeng Zheng, Changwang Pan, Ji Chen, and Wolfgang Kainz,” A Novel Design of Implantable Esophageal Stent to Reduce the MRI RF-Induced Heating Member, IEEE Transactions on Electromagnetic Compatibility, 2016

Y. Liu, J. Shen, W. Kainz, S. Qian S, W. Wu, J. Chen, “Numerical investigations of MRI RF field induced heating for external fixation devices,” Biomed Eng Online. 2013 Feb 9;12:12. doi: 10.1186/1475-925X-12-12

Xiyao Xin, David Jackson, and Ji Chen, "Wireless Power Transfer along Oil Pipe Using Ferrite Materials," accepted in IEEE Transactions on Magnetics, 2016

Y. Liu, W. Kainz , S. Qian S, W. Wu, J. Chen, “Effect of insulating layer material on RF-induced heating for external fixation system in 1.5 T MRI system.,” Electromagn Biol Med.  2013 Jun 1

Z Xiong, S Feng, R Kautz, S Chandra, N Altunyurt, J Chen, “Multi-GPU Accelerated Admittance Method for High-Resolution Human Exposure Evaluation, IEEE Transactions on Biomedical Engineering 62 (12), 2920-2930, 2015

Xin Huang, Jianfeng Zheng, Xin Wu, Mari Kono, Hideki Hozono, Wolfgang Kainz, Ji Chen, “MRI Heating Reduction for External Fixation Devices Using Absorption Material" IEEE Transactions on Electromagnetic Compatibility 57 (4), 635-642, 2015

Jiang, R.; Jansen, B.H.; Sheth, B.R.; Chen, J.; , "Dynamic Multi-Channel TMS With Reconfigurable Coil," IEEE TRANSACTIONS ON NEURAL SYSTEMS AND REHABILITATION ENGINEERING, VOL. 21, NO. 3, MAY 2013

Zubiao Xiong, John E. McGary, and Ji Chen, “Self-Correcting Magnetic Tracking in Dynamic Medical Environments,” IEEE Transactions on Magnetics 51 (2), 1-9, 2015

Y. Liu, J. Chen, W. Kainz, and F. Shellock, “Computational and Experimental Studies of an Orthopedic Implant: MRI-Related Heating at 1.5-Tesla/64-MHz and 3-Tesla/128-MHz,” in press in Journal of Magnetic Resonance Imaging, 2013.

Shi Feng; Rui Qiang; Kainz, W.; Ji Chen "A Technique to Evaluate MRI-Induced Electric Fields at the Ends of Practical Implanted Lead", Microwave Theory and Techniques, IEEE Transactions on, On page(s): 305 - 313 Volume: 63, Issue: 1, Jan. 2015

Zhi-Yuan Zong,Wen Wu, Feng Ling, Ji Chen, and Da-Gang Fang, “Efficient Low-Frequency Breakdown Free Full-Wave PEEC Modeling Based on Geometrical Optics DCIM,” IEEE Transactions on Microwave Theory and Techniques, Vol. 60, June, 2012, pp.1500-1512.

Khaled El Mahgoub, Fan Yang, Atef Z. Elsherbeni, Veysel Demir, and Ji Chen, “Analysis of Multilayered Periodic Structures Using a Hybrid FDTD/GSM Method,” in press, IEEE Antennas and Propagation Society Magazine, April, 2012.

Dawei Li, Jianfeng Zheng, Yan Liu, Changwan Pan, Wolfgang Kainz, Fan Yang, Ji Chen, “An efficient Approach to Estimate MRI RF Field Induced In-vivo Heating for Small Medical implants,” IEEE Transactions on Electromagnetic Compatibility, 57 (4), 643-650, 2015

Zubiao Xiong, Shi Feng, John McGary, and Ji Chen,“Magnetic Tracking Inside Conducting Bores for Radiotheapy Tumor Localization Systems, ” IEEE Transactions on Magnetics, Vol. 48, February, 2012, pp. 395-398.

Yan Liu, Dawei Li, Xiaoyi Min, Shiloh Sison, Gabriel Mouchawar and Ji Chen, “Evaluation of Electromagnetic Field Distributions under 1.5 T MRI Scanning Within Human Models of a Virtual Family,” Computing in Cardiology 2014, Volume 41

Jianxiang Shen, Heng Yang, and Ji Chen,“Analysis of Electrical Property Variations for Composite Medium Using a Stochastic Collocation Method, ” IEEE Transactions on EMC, Vol. 54, October 2011, pp. 272-279.

Xichen Guo, David R. Jackson, Marina Y. Koledintseva, Scott Hinaga, James L. Drewniak, and Ji Chen, “An Analysis of Conductor Surface Roughness Effects on Signal Propagation for Stripline Interconnects,” IEEE Trans. On EMC, 2014

David R. Jackson, Paolo Burghignoli, Giampiero Lovat, Filippo Capolino, Ji Chen, Donald R. Wilton, and Arthur A Oliner, “The Fundamental Physics of Directive Beaming at Microwave and Optical Frequencies and the Role of Leaky Waves,” Proceedings of the IEEE, October 2011, pp.1780-1805.

Dagang Wu, Ji Chen, R. Liu, F. Bi, “Numerical Mo deling of Thin-Film Bulk Acoustic Wave Resonators Using a Crank-Nicolson Finite-Difference Time-Domain Method,” Microwave and Optical Technology Letters, Vol. 53, August 2011, pp. 1719–1721.

Y. J. Zhou, X. Y. Zhou, T. J. Cui, R. Qiang, and J.  Chen, “Efficient Simulations of Periodic Structures with Oblique Incidence Using Direct Spectral FDTD Method,” PIERM Vol. 17, 2011, pp. 101-111.

Minshen Wang, Li Lin, Ji Chen, David Jackson, Wolfgang Kainz, Yihong Qi, and Perry Jarmuszewski, “Evaluation and Optimization of the Specific Absorption Rate For Multi-Antenna Systems,” IEEE Transactions on EMC, Vol. 54,  August, 2011, pp. 628-637.

Y. Qi, P. Jarmuszewski, Z. Zhou, M. Certain, J. Chen, “An Efficient TIS Measurement Technique Based on RSSI for Wireless Mobile Stations,” IEEE Transactions on Instruments and Measurement, Vol, 59, September, 2010, pp. 2414 – 2419.

Rui Qiang, Ji Chen, Fan Yang, “Finite-Difference Time-Domain Modeling of Finite-Sized Electromagnetic Source Over Periodic Structure Via a Planwave Spectral Expansion Approach,” Radio Science, Vol. 45, RS5003, 2010

Khaled ElMahgoub, Fan Yang, Atef Z. Elsherbeni, Veysel Demir and Ji Chen, “ FDTD Analysis of Periodic Structures with Arbitrary Skewed Grid,” IEEE Transactions on Antennas and Propagation, Vol. 58, August, 2010. pp. 2649 – 2657.

Andreas Christ, Wolfgang Kainz, Eckhart G. Hahn, Katharina Honegger, Marcel Zefferer, Esra Neufeld, Wolfgang Rascher, Rolf Janka, Werner Bautz, Ji Chen, Berthold Kiefer, Peter Schmitt, Hans-Peter Hollenbach, Jianxiang Shen, Michael Oberle, Dominik Szczerba, Anthony Kam, Joshua W. Guag, and Niels Kuster, “The Virtual Family - Development of Surface Based Anatomical Models of Two Adults and Two Children for Dosimetric Simulations,” Physics in Medicine and Biology, Vol. 55, January, 2010, pp.N23-28.

J. Shen, H. Yang, and J. Chen, “Stochastic Analysis Electromagnetic Properties Variations for Composite Mixtures,” IET Electronic Letters, Vol. 46, January, 2010, issue 2, pp. 127-129.

Y. Wu, J. Chen, X. Yuan, and G. Zouridakis, “A Programmable DSP Development Platform for Automated Detection of Melanoma,” International Journal of Intelligent Computing in Medical Sciences and Image Processing, Vol. 3, No. 1, March, 2009, pp. 1-8.

D. Benhaddou, M. Balakrishnan, X. Yuan, J. Chen, M. Rugta, R. Barton, H. Yang, “Wireless Sensor Networks for Space Applications: Network Architecture and Protocol Enhancements,” Sensors and Transducers Journal, Vol. 7, Special Issue, October, 2009, pp. 203-212.

M.Y. Koledintseva, S. K. Patil, R. W. Schwartz, W. Huebner, K. Rozanov, J. Shen, and J. Chen, “Prediction of Effective Permittivity of Diphasic Dielectrics as a Function of Frequency,” IEEE Transactions on Dielectrics and Electrical Insulation, Vol. 16, June 2009, pp. 793-808.

Yang, P., Y. Chen, W. Bulter, and X. Wu, J. Chen, "Microwave early Detection of Breast Cancers Using a Virtual-Focus Scanning Method," Electromagn. Biol. Med.Vol. 27(3), 312-22, 2008.

Wu, Dagang, C.R. Liu, J. Chen,"An Efficient FDTD Method for Axially Symmetric LWD Environments," IEEE Transactions on Geosciences and Remote Sensing, Vol. 46(6), 1652 -1656, June 2008.

Jackson, D. R., R. Qiang, F. Capolino, and A. A.Oliner, J. Chen, "The Role of Leaky Plasmon Waves in the Directive Beaming of Light through a Subwavelength Aperture,," Optics Express, Vol. 16(26), 21271-21281, 2008.

Wu, D., R. Qiang, J. Chen, W. Kainz, and S. Seidman,"Possible Overexposure of Pregnant Women in the Third Trimester Due to Scanning in One Model of Walkthrough Metal Detector," accepted with revision by Phys. Med. Biol., 52, 5735-5748, 2007.

Wu, D., R. Qiang, J. Chen, W. Kainz, and S. Seidman,"Safety Evaluation for Walk-through Metal Detector," invited, IEEE EMC Newsletters, 2007.

Wu, D., J. Chen and C. Liu, "Numerical Evaluation of Effective Dielectric Properties of Three-Dimensional Composite Materials with Arbitrary Inclusions Using a Finite-Difference Time-Domain Method," Journal of Applied Physics, 2007.

Yang, F., J. Chen, R. Qiang, and A. Elsherbeni, "A Simple and Efficient FDTD/PBC Algorithm for Electromagnetic Analysis of Periodic Structures," Radio Science, 2007.

Qiang, R., J. Chen, F. Capolino, D.R. Jackson, and D.R. Wilton, "Array Scanning Method-FDTD for Emission of Finite Electromagnetic Sources in Periodic Artificial Materials," IEEE Microwave on Wireless Components Letters, Volume 17, Issue 4, 271-273, April 2007.

Barton, R.J., J. Chen, K. Huang, D. Wu, and H.C. Wu, "Performance of Cooperative Time-Reversal Communication in a Mobile Wireless Environment," International Journal of Distributed Sensor Networks, Volume 3, Issue 1, pages 59-68, January 2007.

D. Wu, S. Shmsi, J. Chen, R. Liu, and W. Kainz, " Evaluations of Specific Absorption Rate and Temperature Rise Within Pregnant Woman Models in Magnetic Resonance Imaging Birdcage Coils," IEEE Transactions on Microwave Theory and Techniques, Volume 54, Issue 12, Part 2, pp. 4472 - 4478, Dec. 2006.

R. Qiang, J. Chen, T. Zhao, K. Han, A. Ruiz, P. Ruchhoeft, and M. Morgan, "Effects of Manufacturing Artifacts on Infrared Filter Performance" Microwave and Optical Technology Letters, Volume 48, Issue 9, pp. 1749 - 1754, June 2006.

R. Barton, J. , J. Chen, K. Huang, D. Wu, and H.C. Wu, "Performance of cooperative time-reversal communication in a mobile wireless environment," Special issue on sensor and ad hoc networks for International journal of distributed sensor network, Volume 3, Issue1, pp. 59 - 68, Apr. 2006.

R. Qiang, D. Wu, J. Chen, S. Wang, D. Wilton, and W. Kainz,"An Efficient Two-Dimensional FDTD Method for Bio-electromagnetic Applications," IEEE Trans. on Magnetics, Volume 42, Issue 4, pp. 1391 - 1394, April 2006.

H.C. Wu, J. Chen, A. Durresi and H. Zhou, "Automatic Geometry-driven OFDM Quality-of-Service Analysis for Indoor Environments" Journal of Interconnection Networks ,Vol. 7, No. 1, pp. 147-162, March 2006.

S. Wang, J. Chen, "A Multigrid ADI Method for Two-Dimensional Electromagnetic Simulations," IEEE Trans. Antenna and Propagations, Volume 54, Issue 2, Part 2, pp. 715 - 720, Feb. 2006.

S. Wang and J. Chen, "A Performance Study on the Iterative ADI-FDTD Method," IEEE Transactions on Antennas and Propagation, Vol. 53, No. 10, pp. 3413-3417, October 2005.

R. Qiang, J. Chen, T. Zhao, S. Wang, P. Ruchhoeft, and M. Morgan, "Modeling of Infrared Bandpass Filters using a Three-dimensional FDTD Method," IEE Electronics Letters, Vol. 41, No. 16, pp. 43-44, August 2005.

S. Wang, J. Chen and P. Ruchhoeft, "An ADI-FDTD Method for Periodic Structures," IEEE Transactions on Antenna and Propagation, Vol. 53, No. 7, pp. 2343-2346, July 2005.

S. Wang and J. Chen, "Pre-iterative ADI FDTD Method for Conductive Medium," IEEE Transaction on Microwave Theory and Techniques, Vol. 53, No. 6, Part 1, pp. 1913-1918, June 2005.

J. Chen, "Grid Computing for Electromagnetics: Parallel Computing and Beyond," Applied Computational Electromagnetics Society News Letter, pp. 17-19, March 2005.

F. Liu, Jose E. Schutt-Aine, and J. Chen, "Full wave analysis and modeling of multiconductor transmission lines", IEEE Trans. on MTT, 2002.

M. Kowalski, J. M. Jin, and J. Chen, "Computation of the signal-to-noise ratio of high-frequency magnetic resonance imagers", IEEE Trans. on Biomedical Engineering, 1999.

J. Chen, J. M. Jin, "B1 and SAR distribution within the human head excited by birdcage coil during MRI", IEEE Trans. on Bio. Med. Eng., 1998.

J. Chen, C. Wu, K.-L. Wu and J. Litva, "Using linear and nonlinear predictor to improve the computational efficiency of FDTD algorithm", IEEE Tans on MTT 1994.

F. Liu, J. Schutt-Ain, and J. Chen, "Full wave Analysis of Lossy Transmission lines via 2D-FDTD and Signal Processing Techniques", IEEE APS-2001, Boston, MA.

F. Liu, J. Schutt-Ain, and J. Chen, "Printed circuit modeling using cluster computing", IEEE APS-2001, Boston, MA.

Ji Chen, Mark Kowalaski, J. M. Jin and L. Latour " Numerical Evlauation of the Signal-to-Noise Ratio of MR Surface Coils using FD-TD and Reciprocity", ISMRM-1999, April, Philadelphia.

J. Chen, C. Wu, K.-L. Wu and J. Litva ,"Combining an autoregressive (AR) model with the FD-TD algorithm for improved computational efficiency" IEEE International Microwave Symposium, pp.749-752, June, 1993.