Hao Xin

Professor, Electrical and Computer Engineering
Professor, Physics
Member of the Graduate Faculty

Contact

(520) 626-6941
Electrical & Computer Engr, Rm. 356E
Tucson, AZ 85721
hxin@ece.arizona.edu

Biography

Dr. Hao Xin is a professor of Electrical and Computer Engineering, and professor of Physics at the University of Arizona. He is also an IEEE Fellow. His current teaching and research interests are on high frequency (from microwave to THz) technologies, including passive and active circuits, antennas, properties and applications of new materials such as metamaterials and nano-materials for wireless communication, sensing, bio-medical, and energy harvesting. Before joining the University of Arizona, he worked as research scientist at Rockwell Scientific Company and as Sr. Principal Multidisciplinary Engineer at Raytheon Missile Systems. He has published over 300 refereed papers and holds 16 patents and 7 patent disclosures in related research areas. He served as the general co-chair of the 8th International Antenna Technology Workshop and the general secretary of the 39th International Infrared, Millimeter Wave and THz Conference. He was an associate editor for IEEE Antennas and Wireless Propagation Letters from 2012 to 2018. He is an associate editor for IEEE Antennas and Wireless Propagation Magazine and IEEE Journal of Radio Frequency ID. He currently serves as the chair of the Young Professionals Committee of the IEEE Antennas and Propagation Society. He is also the Tucson joint chapter chair of IEEE Microwave Theory and Techniques / Antennas and Propagation societies. Dr. Xin has current and previous research support (overall > $14M, individual expense > $8M) from DARPA, ARO, AFOSR, ONR, NSF, AFRL, and industry for his research on a broad range of topics related to microwave engineering. He has graduated and mentored 11 post-docs, 16 (including 6 visiting) PhD students, 10 MS students, and more than 60 undergraduate students. Currently he supervises 3 Post-Doc, 5 PhD students, 2 MS students and 2 undergraduate students.

Degrees

Ph.D. Physics

Massachusetts Institute of Technology, Cambridge, Massachusetts, USA
Study of Microwave Properties of High-TC Superconducting Films

B.S. Physics, Mathematics

University of Massachusetts, Dartmouth, N. Dartmouth, Massachusetts, USA

Work Experience

Raytheon (2003 - 2005)
Rockwell Scientific Company (2000 - 2003)

Awards

IEEE Antennas and Propagation Society Distinguished Lecturer

IEEE, Spring 2021

Arizona Governor’s Innovator of the Year Award

State of Arizona, Summer 2020

College of Engineering Da Vinci Fellow 2020

University of Arizona College of Engineering, Spring 2020

Arizona Engineering Fellow

College of Engineering, the University of Arizona, Fall 2013

National Research Council Sr. Associate Award

National Research Council / Air Force Research Lab, Summer 2012

Senior visiting scholar at Tsinghua University

Tsinghua University, Spring 2012

Interests

No activities entered.

Courses

2021-22 Courses

Dissertation

ECE 920 (Fall 2021)
Dissertation

PHYS 920 (Fall 2021)
Microwave Eng I:Pasv Cir

ECE 486 (Fall 2021)
Microwave Eng I:Pasv Cir

ECE 586 (Fall 2021)

2020-21 Courses

Dissertation

ECE 920 (Summer I 2021)
Active Circuit Design

ECE 488 (Spring 2021)
Active Circuit Design

ECE 588 (Spring 2021)
Dissertation

ECE 920 (Spring 2021)
Dissertation

PHYS 920 (Spring 2021)
Dissertation

ECE 920 (Fall 2020)
Dissertation

PHYS 920 (Fall 2020)

2019-20 Courses

Dissertation

ECE 920 (Spring 2020)
Dissertation

PHYS 920 (Spring 2020)
Independent Study

ECE 699 (Spring 2020)
Thesis

ECE 910 (Spring 2020)
Dissertation

ECE 920 (Fall 2019)
Dissertation

PHYS 920 (Fall 2019)
Thesis

ECE 910 (Fall 2019)

2018-19 Courses

2017-18 Courses

2016-17 Courses

Thesis

ECE 910 (Summer I 2017)
Active Circuit Design

ECE 488 (Spring 2017)
Active Circuit Design

ECE 588 (Spring 2017)
Directed Research

ECE 392 (Spring 2017)
Dissertation

ECE 920 (Spring 2017)
Independent Study

ECE 599 (Spring 2017)
Thesis

ECE 910 (Spring 2017)
Directed Research

ECE 492 (Fall 2016)
Dissertation

ECE 920 (Fall 2016)
Dissertation

PHYS 920 (Fall 2016)
Independent Study

ECE 599 (Fall 2016)
Microwave Eng I:Pasv Cir

ECE 486 (Fall 2016)
Microwave Eng I:Pasv Cir

ECE 586 (Fall 2016)
Research

ECE 900 (Fall 2016)

2015-16 Courses

Directed Research

ECE 392 (Spring 2016)
Dissertation

ECE 920 (Spring 2016)
Independent Study

ECE 599 (Spring 2016)
Independent Study

ECE 699 (Spring 2016)
Research

ECE 900 (Spring 2016)

Scholarly Contributions

Chapters

Liang, M., & Xin, H. (2016). Three-dimensionally printed/additive manufactured antennas. In Handbook of Antenna Technologies(pp 661--697). Springer Singapore.
Xin, H. (2016). Three-dimensionally Printed / Additive Manufactured Antennas. In Handbook of Antenna Technologies. Springer.

Journals/Publications

Kantemur, A., Tak, J., Siyari, P., Abdelrahman, A. H., Krunz, M. M., & Xin, H. (2020). A novel compact reconfigurable broadband antenna for cognitive radio applications. IEEE Transactions on Antennas and Propagation (2nd round of revisions).
Kantemur,, A., Tak, J., Siyari, P., Abdelrahman, A., Krunz, M., & Xin, H. (2020). “A Novel Compact Reconfigurable Broadband Antenna for Cognitive Radio Applications. IEEE Trans. Antennas and Propagation.
Karunakaran, C., Zhao, H., Xin, H., & Witte, R. (2020). Real-time Volumetric Thermoacoustic Imaging and Thermometry using a 1.5D Ultrasound Array. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control.
Sharma, Y., Zhang, H., & Xin, H. (2020). Machine Learning Techniques for Optimizing Design of Double T-Shaped Monopole Antenna. IEEE Trans. Antennas and Propagation.
Tamimi, E., Xin, H., & Witte, R. (2020). Real-time 3D thermoacoustic imaging and thermometry using a selfcalibration technique. Applied Optics.
Zhang, J., Tuo, M., Liang, M., & Xin, H. (2020). Detection properties of photoconductive antennas fabricated on low-temperature-grown GaAs and ErAs: GaAs at subterahertz band. Optical Engineering, 59(6), 061619.
Zhang, J., Tuo, M., Gehl, M., Gibson, R., Liang, M., & Xin, H. (2019). Enhanced terahertz radiation of photoconductive antenna fabricated on GaAs-on-sapphire. AIP Advances, 9(12), 125234.
Blanche, P., Neifeld, M., Tuo, M., Xin, H., & Peyghambarian, N. (2018). A 300 THz tabletop radar range system with sub-micron distance accuracy. Scientific reports, 8(1), 1--8.
Ershadi, S. E., Keshtkar, A., Bayat, A., Abdelrahman, A. H., & Xin, H. (2018). Rotman lens design and optimization for 5G applications. International Journal of Microwave and Wireless Technologies, 10(9), 1048--1057.
Kantemur, A., Sharma, Y., Tak, J., & Xin, H. (2018). A W-band slotted waveguide array antenna based on 3D printing technology.
Moreno, G., Yakovlev, A. B., Bernety, H. M., Werner, D. H., Xin, H., Monti, A., Bilotti, F., & Alu, A. (2018). Wideband elliptical metasurface cloaks in printed antenna technology. IEEE Transactions on Antennas and Propagation, 66(7), 3512--3525.
Sharma, S. K., Xin, H., Wu, B., Vardaxoglou, J. C., & Chan, C. H. (2018). Guest editorial special cluster on three-dimensional printed antennas and electromagnetic structures. IEEE Antennas and Wireless Propagation Letters, 17(11), 1998--2002.
Yu, X., Liang, M., Shemelya, C., Roberson, D. A., Wicker, R., MacDonald, E., & Xin, H. (2018). 3-D printed parts for a multilayer phased array antenna system. IEEE Antennas and Wireless Propagation Letters, 17(11), 2150--2154.
Hanson, G. W., Xin, H., Chew, W. C., Engheta, N., Fumeaux, C., & Hagness, S. C. (2017). The Role of Commercial Simulators and Multidisciplinary Training in Graduate-Level Electromagnetics Education [Education Corner]. IEEE Antennas and Propagation Magazine, 59(6), 127--130.
Kim, C., Espalin, D., Liang, M., Xin, H., Cuaron, A., Varela, I., Macdonald, E., & Wicker, R. B. (2017). 3D printed electronics with high performance, multi-layered electrical interconnect. IEEE Access, 5, 25286--25294.
Tuo, M., Wang, L. u., Amer, M. R., Yu, X., Cronin, S. B., & Xin, H. (2017). Suspended individual SWCNT characterization via bottom gate FET configuration. Microwave and Optical Technology Letters, 59(10), 2610--2614.
Wu, J. (2017). Investigation of Novel Microwave Components Enabled by Additive Manufacturing.
Xin, H., & Liang, M. (2017). 3-D-printed microwave and THz devices using polymer jetting techniques. Proceedings of the IEEE, 105(4), 737--755.
Chen, T., Yu, X., & Xin, H. (2016). A COMPACT PLANAR POWER COMBINER WITH COMPLEX IMPEDANCE MATCHING. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 58(5), 1121-1125.
Chen, T., Yu, X., & Xin, H. (2016). A compact planar power combiner with complex impedance matching. Microwave and optical technology letters, 58(5), 1121--1125.
Chen, T., Zhang, H., & Xin, H. (2016). A W-band Waveguide Band-stop Filter using Electromagnetic Crystal (EMXT) Surface. Circuits and Systems.
Du, G., Liang, M., Sabory-Garcia, R. A., Liu, C., & Xin, H. (2016). 3-D Printing Implementation of an X-band Eaton Lens for Beam Deflection. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 15, 1487-1490.
Hao, Q., & Xin, H. (2016). Nonlinear Microwave Characterization of CVD Grown Graphene. IEEE Antennas and Wireless Propagation Letters, 15, 1557-1560. doi:10.1109/LAWP.2016.2517180
Shemelya, C., Zemba, M., Liang, M., Yu, X., Espalin, D., Wicker, R., Xin, H., & MacDonald, E. (2016). Multi-layer archimedean spiral antenna fabricated using polymer extrusion 3D printing. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 58(7), 1662-1666.
Shemelya, C., Zemba, M., Liang, M., Yu, X., Espalin, D., Wicker, R., Xin, H., & MacDonald, E. (2016). Multi-layer archimedean spiral antenna fabricated using polymer extrusion 3D printing. Microwave and Optical Technology Letters, 58(7), 1662--1666.
Tang, Q. i., Liang, M., Lu, Y. i., Wong, P. K., Wilmink, G. J., Zhang, D. D., & Xin, H. (2016). Microfluidic Devices for Terahertz Spectroscopy of Live Cells Toward Lab-on-a-Chip Applications. SENSORS, 16(4).
Tang, Q. i., Liang, M., Lu, Y. i., Wong, P. K., Wilmink, G. J., Zhang, D. D., & Xin, H. (2016). Microfluidic devices for terahertz spectroscopy of live cells toward lab-on-a-chip applications. Sensors, 16(4), 476.
Tuo, M., Xu, D., Li, S. i., Liang, M., Zhu, Q. i., Hao, Q., & Xin, H. (2016). Nonlinear Microwave Characterization of CVD Grown Graphene. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 15, 1557-1560.
Wang, X., Witte, R. S., & Xin, H. (2016). Thermoacoustic and photoacoustic characterizations of few-layer graphene by pulsed excitations. APPLIED PHYSICS LETTERS, 108(14).
Wang, X., Witte, R. S., & Xin, H. (2016). Thermoacoustic and photoacoustic characterizations of few-layer graphene by pulsed excitations. Applied Physics Letters, 108(14), 143104.
Xin, H., & Hanson, G. W. (2016). Guest Editorial: Special Cluster on Graphene and Two-Dimensional Materials for Antenna Applications. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 15, 1526-1528.
Yu, X. (2016). Investigation of Several Novel Radio-Frequency Techniques-Biologically Inspired Direction Finding, 3D Printed RF Components and Systems, and Fundamental Aspects of Antenna Matching.
Yu, X., Zhou, R., Zhang, H., & Xin, H. (2016). A Microwave Direction of Arrival Estimation Technique Using a Single Antenna. IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 64(7), 3189-3195.
Yu, X., Zhou, R., Zhang, H., & Xin, H. (2016). A microwave direction of arrival estimation technique using a single antenna. IEEE Transactions on Antennas and Propagation, 64(7), 3189--3195.
Bauer, D., Wang, X., Vollin, J., Xin, H., & Witte, R. (2015). Broadband Spectroscopic Thermoacoustic Characterization of Single-Walled Carbon Nanotubes. J. of Spectroscopy, 7. doi:http://dx.doi.org/10.1155/2015/762352
Chen, T., Hua, W., Gbele, K., Zhang, H., & Xin, H. (2015). A DUAL-BAND AMPLIFIER WITH FLEXIBLE FREQUENCY RATIOS. MICROWAVE AND OPTICAL TECHNOLOGY LETTERS, 57(10), 2242-2247.
Chen, T., Wang, L. u., Goodyear, G., Yializis, A., & Xin, H. (2015). Broadband Microwave Characterization of Nanostructured Thin Film With Giant Dielectric Response. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 63(11), 3768-3774.
Ershadi, S., Keshtkar, A., Abdelrahman, A. H., Yu, X., & Xin, H. (2015). Design of Wideband Unit-Cell Element for 5G Antenna Arrays. 2015 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), VOLS 1-3.
Li, S. i., Hua, W., Liang, M., Tuo, M., Tawfick, S., Hart, A. J., Zhu, Q. i., & Xin, H. (2015). Anisotropic Microwave Conductivity Dispersion of Horizontally Aligned Multi-Walled Carbon-Nanotube Thin Film on Flexible Substrate. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 63(11), 3588-3594.
Liang, M., & Xin, H. (2015). 3D Printed Microwave and THz Components. 2015 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), VOLS 1-3.
Liang, M., & Xin, H. (2015). Design of additive manufactured Luneburg Lens working at W-band. 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 354-354.
Liang, M., Li, Y., Meng, H., Neifeld, M. A., & Xin, H. (2015). Reconfigurable Array Design to Realize Principal Component Analysis (PCA)-Based Microwave Compressive Sensing Imaging System. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 14, 1039-1042.
Liang, M., Li, Y., Neifeld, M. A., & Xin, H. (2015). Principal Component Analysis (PCA) based compressive sensing millimeter wave imaging system. 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 341-341.
Liang, M., Shemelya, C., MacDonald, E., Wicker, R., & Xin, H. (2015). 3-D Printed Microwave Patch Antenna via Fused Deposition Method and Ultrasonic Wire Mesh Embedding Technique. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 14, 1346-1349.
Liang, M., Yu, X., Shemelya, C., MacDonald, E., & Xin, H. (2015). 3D Printed Multilayer Microstrip Line Structure with Vertical Transition toward Integrated Systems. 2015 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS).
Qin, T., Wang, X., Qin, Y., Ingram, P., Wan, G., Witte, R. S., & Xin, H. (2015). Experimental Validation of a Numerical Model for Thermoacoustic Imaging Applications. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 14, 1235-1238.
Qin, T., Wang, X., Qin, Y., Wan, G., Witte, R. S., & Xin, H. (2015). Quality Improvement of Thermoacoustic Imaging Based on Compressive Sensing. IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS, 14, 1200-1203.
Shemelya, C. M., Rivera, A., Perez, A. T., Rocha, C., Liang, M., Yu, X., Kief, C., Alexander, D., Stegeman, J., Xin, H., Wicker, R. B., MacDonald, E., & Roberson, D. A. (2015). Mechanical, Electromagnetic, and X-ray Shielding Characterization of a 3D Printable Tungsten-Polycarbonate Polymer Matrix Composite for Space-Based Applications. JOURNAL OF ELECTRONIC MATERIALS, 44(8), 2598-2607.
Tang, Q. i., & Xin, H. (2015). Stability analysis and parasitic effects of negative impedance converter circuits. 2015 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM (IMS).
Tang, Q. i., Kantemur, A., & Xin, H. (2015). A Review of Active Metamaterials Incorporating Gain Device / Medium. 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 15-15.
Wang, X., Liang, M., Witte, R. S., & Xin, H. (2015). Fabrication of a Realistic Breast Phantom Based on 3D Printing Technology for Thermoacoustic Imaging Application in Breast Cancer Detection. 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 17-17.
Wang, X., Qin, T., Witte, R. S., & Xin, H. (2015). Compressive Sensing Based Contrast-Enhanced Thermoacoustic Imaging for Breast Cancer Detection. 2015 31st International Review of Progress in Applied Computational Electromagnetics (ACES) Vol 31.
Wang, X., Qin, T., Witte, R. S., & Xin, H. (2015). Computational Feasibility Study of Contrast-Enhanced Thermoacoustic Imaging for Breast Cancer Detection Using Realistic Numerical Breast Phantoms. IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 63(5), 1489-1501.
Wang, X., Qin, Y., Witte, R. S., & Xin, H. (2015). Modeling of Non-contact Thermoacoustic Imaging. 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 314-314.
Wang, X., Witte, R. S., & Xin, H. (2015). Thermoacoustic Applications in Breast Cancer Imaging, Non-contact Explosive Detection and Communications. 2015 ASIA-PACIFIC MICROWAVE CONFERENCE (APMC), VOLS 1-3.
Xin, H. (2015). Active Metamaterials with Gain Compensation. 2015 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP).
Xin, H., & Liang, M. (2014). “Microwave to THz characterization of carbon based nano-materials”. IEEE Microwave Magazine, 15(1), 40-51.
Xin, H., & Tang, Q. (2014). “Active Metamaterial Incorporating Gain Device / Medium: A Review,”. Journal of Applied Computational Electromagnetics.
Xin, H., Liang, M., Ng, W., Chang, K., Gbele, K., & Gehm, M. (2014). “A 3-D Luneburg Lens Antenna Fabricated by Polymer Jetting Rapid Prototyping”. IEEE Trans. Antennas Propag., 62(4), 1799-1807.
Xin, H., Nayeri, P., Liang, M., Sabory-Garcia, R., Tuo, M., Yang, F., Gehm, M., & Elsherbeni, A. (2014). "3D Printed Dielectric Reflectarrays: Low-Cost High-Gain Antennas at Sub-Millimeter Waves”. IEEE Trans. Antennas Propag., 62(4), 2000-2008.
Xin, H., Ng, W., Golish, D., & Gehm, M. (2014). “3D Rapid Prototyping of Terahertz Computer-Generated Volume Holograms”. Optics Express, 22(3), 3349-3355.
Xin, H., Ye, D., Chang, K., & Ran, L. (2014). “Microwave Gain Medium with Negative Refractive Index”. Nature Communications.
Xin, H., Zhou, R., & Zhang, H. (2014). “Liquid Based Dielectric Resonator Antenna and Its Application for Measuring Liquid Real Permittivities”. IET Microwaves, Antennas & Propagation, 8(4), 255-262.
Xin, H., Zimmerman, I., & Liang, M. (2014). “Infrared (IR) Thermal Emission from a 2D Array of Plasmonic Spheres”. Journal of App. Phys., 116(054910).
Xin, H., Zimmerman, I., Wu, Z., & Ziolkowski, R. (2014). “THz thermal emission control via electromagnetic band engineering”. IEEE Trans. THz Tech, 4(2), 213-224.
Xin, H. (2013). “Using a portable terahertz spectrometer to measure the optical properties of in vivo human skin”. Jouranl of Biomed. Opt. Letts., 18 (12), 120503.
Xin, H., Che, R., Yi, Z., & Zhu, Q. (2013). “Design of an integrated lens for separating microwave and optical wave”. Microwave and Opt. Tech. Letts., 55(10), 2358-2363.
Wu, Z., Liang, M., Ng, W., Gehm, M., & Xin, H. (2012). "Terahertz Horn Antenna Based on Hollow-Core Electromagnetic Crystal (EMXT) Structure". IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 60(12), 5557-5563.
More info
An all-dielectric terahertz (THz) horn antenna based on hollow-core electromagnetic crystal structure is designed, fabricated and characterized. Simulation shows that the antenna works above 100 GHz, with better than 30 dB return loss and highly directional radiation pattern. Fabrication of the antenna is done using a THz polymer-jetting rapid prototyping technique. Characterization of the antenna is performed using a THz time-domain spectrometer. Measurement results of the far-field radiation patterns show good agreement with simulation results.
Xin, H., Bauer, D., Wong, X., Vollin, J., & Witte, R. (2012). “Spectroscopic Thermoacoustic Imaging of Water and Fat Composition”. Appl. Phys. Lett., 101(3), 033705: 1-4.
Xin, H., Chang, K., Jiang, T., & Ran, L. (2012). “Investigation of Microwave Negative Refractive Index (NRI) Transmission Lines Incorporating Tunnel Diodes”. IEEE Antennas Wireless Propag. Lett., 11, 671-674.
Xin, H., Wang, X., Bauer, D. R., Vollin, J. L., Manzi, D. G., & Witte, R. (2012). “Impact of Microwave Pulses on Thermoacoustic Imaging Applications”. IEEE Antennas Wireless Propag. Lett., 11, 1634-1637.
Xin, H., Wang, X., Witte, R., & Bauer, D. (2012). “Microwave-Induced Thermoacoustic Imaging Model for Potential Breast Cancer Detection”. IEEE Trans. Bio-Medical Eng..
Xin, H., Zhou, R., & Liu, D. (2012). “A Wideband Circularly Polarized Patch Antenna for 60 GHz Wireless Communications”. Wireless Eng. And Tech., 3(3), 97-105.

Proceedings Publications

Ahmad, W., Saraswat, S., Zhao, H., Tak, J., Tamimi, E., Xin, H., & Witte, R. S. (2020, July). Optimizing Beam Quality for Focused Microwave Therapy (FMT) using a 32-Channel Phased Array. In IEEE AP/URSI Symp..
Kantemur, A., Tak, J., Siyari, P., Abdelrahman, A. H., Krunz, M. M., & Xin, H. (2020, May). A novel compact reconfigurable broadband antenna for cognitive radio applications. In IEEE Transactions on Antennas and Propagation (2nd round of revisions).
Sharma, Y., Chen, X., Zhou, Q., Zhang, H., & Xin, H. (2020, July). Machine Learning Techniques’ Based Antenna Design Modeling and Optimization. In IEEE AP/URSI Symp.
Tamimi, E., Zhao, H., Xin, H., & Witte, R. S. (2020, July). Real-time thermoacoustic imaging and thermometry using a self-calibration technique. In IEEE AP/URSI Symp.
Karunakaran, C., Saraswat, S., Tak, J., Zhao, H., Xin, H., & Witte, R. S. (2019). Real-Time Thermoacoustic Imaging and Thermometry during Focused Microwave Heating in Multilayer Breast Phantom. In 2019 IEEE International Ultrasonics Symposium (IUS).
Kiekens, K. C., Vega, D., Coompson, J., Xin, H., & Barton, J. K. (2019). 3D Printed Micro Lenses for Depth of Focus Imaging. In Optical Fabrication and Testing.
Saraswat, S., Karunakaran, C. P., Tak, J., Zhao, H., Ahmad, W., Witte, R. S., & Xin, H. (2019). Thermoacoustic Image-Guided Focused Microwave Therapy for Enhanced Breast Cancer Treatment. In 2019 IEEE MTT-S International Microwave Symposium (IMS).
Saraswat, S., Tak, J., Liang, M., Lyu, C., Witte, R. S., & Xin, H. (2018). Towards study on thermoacoustic imaging guided focused microwave therapy for breast cancer treatment. In 2018 IEEE/MTT-S International Microwave Symposium-IMS.
Abdelrahman, A. H., Liang, M., & Xin, H. (2017). Reconfigurable reflectarray antenna for microwave detection and imaging. In 2017 IEEE International Symposium on Antennas and Propagation \& USNC/URSI National Radio Science Meeting.
Gulati, G., Abdelrahman, A. H., Tang, Q. i., Liang, M., Bose, T., & Xin, H. (2017). Passive and active matching of electrically-small helical antenna for HF-band communications. In 2017 IEEE International Symposium on Antennas and Propagation \& USNC/URSI National Radio Science Meeting.
Kantemur, A., Abdelrahman, A. H., & Xin, H. (2017). A novel compact reconfigurable UWB antenna for cognitive radio applications. In 2017 IEEE International Symposium on Antennas and Propagation \& USNC/URSI National Radio Science Meeting.
Sharma, Y., Wu, J., Xin, H., & Zhang, H. H. (2017). Sparse linear regression for optimizing design parameters of double T-shaped monopole antennas. In 2017 IEEE International Symposium on Antennas and Propagation \& USNC/URSI National Radio Science Meeting.
Tang, Q. i., & Xin, H. (2017). Non-foster circuit for wideband matching of high frequency helical antenna. In 2017 IEEE MTT-S International Microwave Symposium (IMS).
Abdelrahman, A. H., & Xin, H. (2016, July). Design of Double-Layer Transmitarray Antenna using 3D Printing Technology. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Abdelrahman, A. H., Liang, M., & Xin, H. (2016, July). Reconfigurable Reflectarray Antenna Design for Millimeter Wave Imaging. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Abdelrahman, A. H., Sirsi, S., Wang, X., Qin, Y., Witte, R., & Xin, H. (2016, July). Remote Thermoacoustic Imaging of Inert Explosives Embedded in Biological Tissue Samples. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Ershadi, S., Abdelrahman, A. H., Liang, M., Yu, X., Xin, H., & Ershadi, S. (2016, July). A Novel Reconfigurable Broadband Antenna for Cognitive Radio Systems. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM, 1799-1800.
Ershadi, S., Keshtkar, A., Ershadi, S., Abdelrahman, A. H., Yu, X., & Xin, H. (2016, December). Wideband Subarray Design for 5G Antenna Arrays. In 2016 URSI ASIA-PACIFIC RADIO SCIENCE CONFERENCE (URSI AP-RASC), 185-187.
Hoskins, C., Zukova, A., Turnblade, J., Shi, Y., Burrola, S., Marcellin, M. W., & Xin, H. (2016, November). Inkjet printed antennas. In International Telemetering Conference.
Kantemur, A., Tang, Q., & Xin, H. (2016). Design of volumetric sub-THz negative refractive index metamaterial with gain. In 2016 IEEE International Symposium on Antennas and Propagation (APSURSI).
Kantemur, A., Tang, Q., & Xin, H. (2016, July). Design of Volumetric Sub-THz Negative Refractive Index Metamaterial with Gain. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Liang, M., Li, Y., Neifeld, M., & Xin, H. (2016, January). Reconfigurable array based compressive sensing millimeter wave system. In 2016 URSI Boulder Symposium.
Liang, M., Wu, J., Yu, X., Shemelya, C., MacDonald, E., & Xin, H. (2016, Spring). Recent Applications of 3D Printing from Microwave to THz. In International Workshop on Antenna Technology: Small Antennas, Innovative Structures, and Applications (iWAT).
Liang, M., Yu, X., Sabory-Garc\'\ia, R., Ng, W., Gehm, M. E., & Xin, H. (2016). Direction of arrival (DOA) estimation system using 3D printed Luneburg lens. In 2016 IEEE/ACES International Conference on Wireless Information Technology and Systems (ICWITS) and Applied Computational Electromagnetics (ACES).
Liang, M., Yu, X., Sabory-Garcia, R., Ng, W., Gehm, M. E., & Xin, H. (2016, March). DIRECTION OF ARRIVAL (DOA) ESTIMATION SYSTEM USING 3D PRINTED LUNEBURG LENS. In 2016 IEEE/ACES INTERNATIONAL CONFERENCE ON WIRELESS INFORMATION TECHNOLOGY AND SYSTEMS (ICWITS) AND APPLIED COMPUTATIONAL ELECTROMAGNETICS (ACES).
Liang, M., Yu, X., Sabory-García, R., Ng, W., Gehm, M., & Xin, H. (2016, July). Direction of arrival estimation system using 3D printed Luneburg lens. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Sirsi, S., Abdelrahman, A. H., Wang, X., Qin, Y., Witte, R., & Xin, H. (2016, January). Application of Non-Contact Thermoacoustic Imaging for Embedded Explosive Detection. In 2016 URSI Boulder Symposium.
Tuo, M., Liang, M., Zhang, J., & Xin, H. (2016, September). Time-Domain THz Near-Field Imaging Incorporating Hadamard Multiplexing Method. In 2016 41ST INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER, AND TERAHERTZ WAVES (IRMMW-THZ).
Tuo, M., Zhang, J., Liang, M., Ng, W., Gehm, M., & Xin, H. (2016, January). Far Field and Near Field Performance Characterization of a THz Imaging System. In 2016 URSI Boulder Symposium.
Tuo, M., Zhang, J., Liang, M., Ng, W., Gehm, M., & Xin, H. (2016, July). Photoconductive Antenna Array Based THz Near Field Imaging System Incorporating Hadamard Multiplexing Method. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Wu, J., Yu, X., Liang, M., Shemelya, C., Roberson, D., MacDonald, E., Wicker, R., & Xin, H. (2016, July). Three-D Printable Material Development and Characterization for Electromagnetic Applications. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Yu, X., & Xin, H. (2016, July). Fundamental Bandwidth Limit Study of Electrically Small Antennas. In 2016 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM.
Yu, X., Wu, J., Liang, M., Abdelrahman, A. H., & Xin, H. (2016, January). Novel Electromagnetic Structures Enabled by 3D Printing Technology. In 2016 URSI Boulder Symposium.
Johnson, B., Madrid, C., Yiin, K., Wang, H., Li, C., Tan, X., Marcellin, M. W., & Xin, H. (2015, October). 3D printed antennas for wireless communication. In International Telemetering Conference.
Tuo, M., Li, S. i., Xu, D., Liang, M., Zhu, Q. i., Hao, Q., & Xin, H. (2015, April). Linear and Nonlinear Microwave Characterization of CVD-Grown Graphene Using CPW Structure. In 2015 9th European Conference on Antennas and Propagation (EuCAP).
Tuo, M., Zhang, J., Liang, M., Ng, W., Gehm, M. E., & Xin, H. (2015, April). THz Photoconductive Antenna Array Based Near Field Imaging. In 2015 40TH INTERNATIONAL CONFERENCE ON INFRARED, MILLIMETER AND TERAHERTZ WAVES (IRMMW-THZ).
Wu, J., Yu, X., Liang, M., & Xin, H. (2015, July). Antenna Radiation Pattern Control through 3D Printed Inhomogeneous Dielectrics. In 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 353-353.
Yu, X., Liang, M., Shemelya, C., Wicker, R., MacDonaldand, E., & Xin, H. (2015, July). 3D Printable Multilayer Phased Array Design. In 2015 USNC-URSI RADIO SCIENCE MEETING (JOINT WITH AP-S SYMPOSIUM) PROCEEDINGS, 351-351.
Zhang, J., Tuo, M., Gehl, M., Gibson, R., Liang, M., Khitrova, G., & Xin, H. (2015, April). Terahertz Emission From Photoconductive Antenna Fabricated on GaAs/Sapphire Substrate. In 2015 9th European Conference on Antennas and Propagation (EuCAP).
Xin, H. (2014, April). “Graphene conductivity characterization at microwave and THz frequency”. In European Antenna and Propagation Conference (EuCAP-2014).
Xin, H. (2014, August). Compressive Sensing Based Contrast Enhanced Thermoacoustic Imaging For 3-D Breast Cancer Detection. In URSI General Assembly, Beijing, Aug. 2014.
Xin, H. (2014, August). Non-contact thermoacoustic imaging based on laser and microwave vibrometry. In Progress in Electromagnetics Research 2014.
Xin, H. (2014, Fall). Characterization of Tungsten/Polycarbonate Polymer Matrix Composites for Mechanical, Electromagnetic, and Radiation Shielding Applications. In Symp. Of Additive Manufacturing: Interrelationships of Fabrication, Constitutive Relationships Targeting Performance, and Feedback to Process Control, 2014.
Xin, H. (2014, January). "Parameter optimization for a photoconductive antenna used as receiver in terahertz time-domain spectrometer". In URSI, Boulder.
Xin, H. (2014, January). A Band-stop Filter Using Electromagnetic Crystal (EMXT) Surface. In URSI, Boulder.
Xin, H. (2014, January). Comparison of Carbon Nanotubes and Air Bubbles as Contrast Agents for Thermoacoustic Imaging by Computational Studies. In URSI, Boulder.
Xin, H. (2014, January). Direction of Arrival Estimation Enhancement for Closely Spaced Electrically Small Antenna Array. In URSI, Boulder.
Xin, H. (2014, July). 3D Microwave Eaton Lens Fabricated by Polymer Jetting Rapid Prototyping. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Beam Scanning Array Based on Luneburg Lens. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Comparison of Photoconductive Antenna Performance on LT-GaAs and SI-GaAs Substrates. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Electromagnetic materials of artificially controlled properties for 3D printing applications. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Experimental Validation of a Numerical Model for Thermoacoustic Imaging. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Fabrication of microwave patch antenna using additive manufacturing technique. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Impact of Matching Networks on Direction Finding Performance Utilizing Two Closely Spaced Electrically Small Antennas. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Microwave (1.7–2.6 GHz) Characterization of Hydroxylapatite and Oxalate Using Rectangular Waveguide. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Microwave-Induced Thermoacoustic Imaging for Embedded Explosives Detection. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Numerical analysis of terahertz generation characteristics of photoconductive antenna. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Performance Improvement for Thermoacoustic Imaging Using Compressive Sensing. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Radio-Frequency Direction Finding Inspired by Human Ears. In Asian Pacific Conf. on Antennas and Propagation (APCAP), Harbin, China.
Xin, H. (2014, July). Stability of Tunnel Diode based Negative Impedance Circuit. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, July). Study of Power Efficiency of Non-Foster Impedance Matching for Electrically Small Antenna. In IEEE Antennas and Propagation / URSI Symp., Memphis, TN.
Xin, H. (2014, October). A novel method for 3d printing high conductivity alloys for UHF applications. In International Telemetering Conference.
Xin, H. (2014, October). Direction of Arrival Estimation of Broadband Signal Using Single Antenna. In International Telemetering Conference.
Xin, H. (2014, September). Non-contact thermoacoustic imaging based on laser and microwave vibrometry. In IEEE International Ultrasonics Symp.
Xin, H. (2013, April). "Electromagnetic Crystal (EMXT) based Terahertz Horn Antenna”. In European Conference of Antenna and Propagation (EuCAP), Gothenburg, Sweden.
Xin, H. (2013, April). “Terahertz Characterization of Carbon Nanotube and Graphene On-Substrate Thin Films”. In European Conference of Antenna and Propagation (EuCAP-2013).
Xin, H. (2013, December). “GHz to THz Components and Microsystems Utilizing 3D Additive Manufacturing Technology”. In IEEE India Microwave and RF Conf..
Xin, H. (2013, December). “Thermoacoustic Imaging and Spectroscopy for Breast Cancer Detection Applications”. In IEEE MTT BioMed Conf., Singapore.
Xin, H. (2013, February). “Development of Terahertz Microfluidic Devices toward “Lab-on-a-Chip” Applications". In SPIE Photonic West.
Xin, H. (2013, February). “Using a portable terahertz spectrometer to measure the optical properties of in vivo human skin". In SPIE Photonic West.
Xin, H. (2013, July). "Terahertz Metasurface for Potential Live Cell Sensing Application”. In IEEE AP/URSI Symp., Orlando.
Xin, H. (2013, July). Characterization Of Anisotropic Conduction Of Horizontally Aligned Carbon Nanotube Thin Films. In IEEE Antennas and Propagation / URSI Symp., Orlando, FL.
Xin, H. (2013, July). Computational Study of Contrast-Agent-Enhanced Thermoacoustic Imaging for Breast Cancer Detection Using Realistic Numerical Breast Phantoms. In IEEE Antennas and Propagation / URSI Symp., Orlando, FL.
Xin, H. (2013, July). High-Gain Dielectric Reflectarray Antennas for THz Applications. In IEEE Antennas and Propagation / URSI Symp., Orlando, FL.
Xin, H. (2013, July). Impact of Microwave Pulses on Thermoacoustic Imaging Applications. In IEEE Antennas and Propagation / URSI Symp., Orlando, FL.
Xin, H. (2013, July). Investigation of Nonlinear Modeling for Active Antenna Design. In IEEE Antennas and Propagation / URSI Symp., Orlando, FL.
Xin, H. (2013, June). A Hybrid Microwave / Acoustic Communication Scheme - Thermoacoustic Communication. In IEEE International Microwave Symposium (IMS).
Xin, H. (2013, June). Broadband Electronically Beam Scanning Structure Using Luneburg Lens. In IEEE International Microwave Symposium (IMS).
Xin, H. (2013, November). “Active Microwave Metamaterials”. In Workshop on Computational Electromagnetics Methods and Applications, Harbin.
Xin, H. (2013, October). Direction of Arrival Estimation Improvement for Closely Spaced Electrically Small Antenna Array. In International Telemetering Conference.
Xin, H. (2013, September). Design, Fabrication, and Measurement of Dielectric Reflectarray Antennas at 100 GHz. In IRMMW-THz.
Xin, H. (2013, September). IR Thermal Emission from an Array of Plasmonic Coated Spheres. In IRMMW-THz.
Xin, H. (2012, July). A Balanced Active Composite Right-/ Left-Handed (CRLH) Transmission Line with Gain. In IEEE Antennas and Propagation / URSI Symp..
Xin, H. (2012, July). Direction of Arrival Estimation with Two Planar Inverted F Antennas and a Scatter. In IEEE Antennas and Propagation / URSI Symp..
Xin, H. (2012, July). Thermoacoustic Imaging and Spectroscopy for Enhanced Materials Differentiation. In IEEE Antennas and Propagation / URSI Symp..
Xin, H. (2012, July). “High Frequency (Microwave to THz) Study of Carbon Based Nano-Materials”. In IEEE Antennas and Propagation / URSI Symp., Chicago IL.
Xin, H. (2012, July). “Printed 3-D Electromagnetic Crystal (EMXT) Based THz Micro-Systems”. In IEEE Antennas and Propagation / URSI Symp., Chicago IL.
Xin, H. (2012, June). Balanced and Symmetric Design of Active Composite Right- / Left-Handed Transmission Line with Gain. In IEEE International Microwave Symposium (IMS).
Xin, H. (2012, June). Direction of Arrival Estimation Utilizing Incident Angle Dependent Spectra. In IEEE International Microwave Symposium (IMS).
Xin, H. (2012, June). Direction of arrival estimation using Luneburg lens. In IEEE International Microwave Symposium (IMS).
Xin, H. (2012, June). Fabrication of Terahertz Gradient-index Components via 3D Rapid Prototyping. In Sensors Conference.
Xin, H. (2012, June). “Investigation of High Frequency Properties of Carbon Based Nano-Materials and Devices”. In IEEE Microwave Symp., workshop talk, Montreal Canada.
Xin, H. (2012, March). “Active Negative Refraction Index (NRI) Transmission Line with Gain”. In IEEE International Workshop on Antenna Technology (iWAT), Tucson AZ.
Xin, H. (2012, March). “Experimental Research on the Microwave Properties of Carbon Nanotube Array”. In IEEE International Workshop on Antenna Technology (iWAT).
Xin, H. (2012, October). Broadband Thermoacoustic Spectroscopy of Single Walled Carbon nanotubes. In IEEE International Ultrasonics Symp.
Xin, H. (2012, September). 3D Rapid Prototyping of Terahertz Computer-Generated Volume Holograms. In IRMMW-THz.
Xin, H. (2012, September). Terahertz Characterization of Graphene Thin Films on Both Sides of Substrate. In IRMMW-THz.
Xin, H. (2012, September). “High Frequency Characterization of Carbon Nanotube and Graphene Materials”. In International Conference on Electromagnetics in Advanced Applications (ICEAA 2012).

Others

Xin, H. (2020). Fundamental Properties and Practical Application of Active Microwave Metamaterials Incorporating Gain Devices.
Witte, R., Xin, H., & Martin, D. (2019). Thermoacoustic image-guided microwave therapy system.
Bose, T., Xin, H., Marefat, M., Asadi, H., Abdelrahman, A., & Liang, M. (2018). Cognitive hf radio with tuned compact antenna.
Xin, H. (2018, October). Invited TAlk University of Arizona Tech Launch Talk.
Xin, H., Liang, M., Neifeld, M. A., & Harvey, T. (2018). Reconfigurable reflect-array to realize task-specific compressive sensing in screening applications.

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