[1] C. Liu and R. Zoughi, Microwave   Harmonic Synthetic Aperture Radar (SAR) Imaging for Detecting Weak-Scattering   Defects Exhibiting Nonlinear Behavior, 2022 IEEE International   Instrumentation and Measurement Technology Conference (I2MTC), Ottawa,   ON, Canada, 2022, pp. 1-5, doi: 10.1109/I2MTC48687.2022.9806665. Student Best Paper Finalists.

[2] C. Liu, R.   Zoughi, Adaptive Synthetic Aperture Radar (SAR) Imaging for Optimal Cross-Range Resolution and Image Quality in NDE Applications, IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-7, 2021,   Art no. 8005107, doi: 10.1109/TIM.2021.3118080. 

[3] C. Liu,   M. T. Al Qaseer and R. Zoughi, Permittivity Extraction from Synthetic Aperture Radar (SAR) Images of Multilayered Media, in IEEE   Transactions on Instrumentation and Measurement, vol. 70, pp. 1-11, 2021, Art no. 8004611, doi: 10.1109/TIM.2021.3113118.

[4] C. Liu,   M. T. Al Qaseer and R. Zoughi, Influence of Antenna Pattern on Synthetic Aperture Radar Image Sidelobe Level in NDE Applications, in IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-6, 2021, Art no. 8002906, doi: 10.1109/TIM.2021.3062193.

[5] C. Liu,   M. T. Al Qaseer and R. Zoughi, Influence of Antenna Pattern on Synthetic Aperture Radar Resolution for NDE Applications, in IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-11, 2021, Art no. 8000911, doi: 10.1109/TIM.2020.3026122.

[6] C. Liu, M.T. Al Qaseer and R. Zoughi, “Wideband Double-Ridged TEM Horn for Nondestructive Evaluation and Imaging Applications,” Proceedings of the 42nd Annual Meeting and Symposium of the Antenna Measurement Techniques Association (AMTA), P. 4, November 2-5, 2020 (virtual). 

[7] C. Liu, K. Brinker and R. Zoughi, “Single Antenna Dual Circularly-Polarized Chipless RFID Tag Reading   Methodology,” Proceedings of the 42nd Annual Meeting and Symposium of the Antenna Measurement Techniques Association (AMTA), P. 6, November   2-5, 2020 (virtual). Best Student Paper Award.

[8] C. Liu, S. Barker, L. Fan, M.   T. Ghasr, G. Chen, and R. Zoughi. Microwave High-Resolution 3D SAR Imaging of Corroded Reinforcing Steel Bars in Mortar Subjected to Accelerated   Electrochemical Corrosion the 9th International Conference on Structural Health Monitoring of Intelligent Infrastructure (2019: Aug.   4-7, St. Louis, MO) (2019) 

[9] M. T.   Ghasr, S. Barker, C. Liu, G. Chen, R. Zoughi. Detection of   Delamination and Corrosion in a Pedestrian Bridge Deck Using Microwave SAR   Imaging Approach the 9th International Conference on Structural   Health Monitoring of Intelligent Infrastructure (2019: Aug. 4-7, St.   Louis, MO) (2019) 

[10] C. Liu, X. Zhou, W.M. Yu, T.J. Cui, “An Efficient and   Analytical Solution to the Integral on Truncated-Wedge ILDC for Polygonal Surfaces, Applied   Computational Electromagnetics Society Journal, Vol. 32 No. 2, pp.106-112, February 2017.

[11] C. Liu, W.M. Yu, and T.J. Cui,   Implementation of Edge Mesh-Free Truncated Wedge ILDCs Based on Plane   Triangular Patches, IEEE Asia-Pacific Microwave Conference 2016,   New Delhi, India, 2016.

[12] C. Liu, W.M. Yu, X.Y. Zhou and T.J. Cui,   A frequency-independent method of truncated wedge incremental length   diffraction coefficients for large complex polygonal surfaces, 2015 IEEE 6th International Symposium on Microwave, Antenna, Propagation, and EMC Technologies (MAPE), Shanghai, 2015, pp. 797-799, doi: 10.1109/MAPE.2015.7510436.