Anastasios Papathanasopoulos

Anastasios Papathanasopoulos received the B.S. and M.S. degrees in electrical and computer engineering from the National Technical University of Athens, Athens, Greece, in 2017. He is currently pursuing a Ph.D. degree with the University of California Los Angeles (UCLA), Los Angeles, CA, USA, under the supervision of Prof. Y. Rahmat-Samii with the Antenna Research, Analysis, and Measurement Laboratory. He was the recipient of several awards, including the 2017 UCLA Henry Samueli School of Engineering and Applied Science Fellowship from the Electrical and Computer Engineering Department. In 2019, he was awarded the Future Investigator in NASA Earth and Space Science and Technology (FINESST) Research Grant, the Onassis Foundation Scholarship, the URSI National Radio Science Meeting Travel Grant, and the UCLA Henry Samueli School of Engineering and Applied Science Excellence in Teaching Award.

His current research interests include the design and prototyping of novel metamaterial inhomogeneous lens antennas for next-generation spaceborne wind scatterometer weather radar satellites. Other research interests include orbital angular momentum for antenna applications, computational electromagnetics, gradient refractive index (GRIN) metamaterials, high-gain antennas, and applied mathematics.

• A. Papathanasopoulos and Y. Rahmat‐Samii, "Fundamentals of Orbital Angular Momentum Beams," in Electromagnetic Vortices: Wave Phenomena and Engineering Applications, eds. Zhi Hao Jiang, Douglas H. Werner, pp.1-32, Wiley-IEEE Press, 2022.

• Z. Wang, R. Hensleigh, Z. Xu et al., "Ultra-light antennas via charge programmed deposition additive manufacturing," Nature Communications, vol. 16, no. 427, pp. , January 2025.
• Y. Rahmat-Samii, J. Wang, A. Papathanasopoulos, "The Evolution of Printed Lens and Transmitarray Antennas: Navigating representative past, present, and future designs and manufacturing techniques," IEEE Antennas and Propagation Magazine, vol. 66, no. 3, pp. 52 - 67, May 2024.
• A. Papathanasopoulos, P. A. Apostolopoulos and Y. Rahmat-Samii, "Optimization Assisted by Neural Network-Based Machine Learning in Electromagnetic Applications," IEEE Transactions on Antennas and Propagation, vol. 72, no. 1, pp. 160-173, January 2024.
• A. Papathanasopoulos and Y. Rahmat-Samii, "Transmitarray Antenna for Conical Beam Scanning," IEEE Transactions on Antennas and Propagation, vol. 70, no. 11, pp. 11155-11160, November 2022.
• A. Papathanasopoulos, J. Budhu, Y. Rahmat-Samii, R. Hodges, and D. Ruffatto, "3D-Printed Shaped and Material-Optimized Lenses for Next-Generation Spaceborne Wind Scatterometer Weather Radars," IEEE Transactions on Antennas and Propagation, vol. 70, no. 5, pp. 3163 - 3172, May 2022.
• A. Papathanasopoulos, Y. Rahmat-Samii, N.C. Garcia, and J.D. Chisum, "A Novel Collapsible Flat-Layered Metamaterial Gradient-Refractive-Index Lens Antenna," IEEE Transactions on Antennas and Propagation, vol. 68, no. 3, pp. 1312-1321, March 2020.
• T. K. Mavrogordatos, A. Papathanasopoulos, and G. Fikioris, "An Effective Current Approach for Hallén’s Equation in Center-Fed Dipole Antennas With Finite Conductivity," IEEE Transactions on Antennas and Propagation, vol. 67, no. 6, pp. 3680-3687, June 2019.
• G. Fikioris and A. Papathanasopoulos, "On the Thin-Wire Integral Equations for Carbon Nanotube Antennas," IEEE Transactions on Antennas and Propagation, vol. 66, no. 7, pp. 3567-3576, July 2018.

• A. Papathanasopoulos, "Professor Yahya Rahmat-Samii's Exceptional Contributions to Research and Teaching as Seen by a Ph.D. Student: A Great Advisor and a True Friend," in 2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI), pp. 7-8, Portland, OR, USA, July 2023.
• T. Huang, A. Papathanasopoulos and Y. Rahmat-Samii, "A Shorted-Annular-Ring GPS Antenna for Freight-Carrying Autonomous Rail Vehicles," in 2023 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), pp. 251-252, Boulder, CO, USA, January 2023.
• A. Papathanasopoulos, J. Wang and Y. Rahmat-Samii, "Understanding the Far-Field Properties of Orbital Angular Momentum Beams through the Antenna Aperture Field Method," in the National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), pp. 178-179, Boulder, CO, USA, January 2022.
• J. Wang, A. Papathanasopoulos, Y. Rahmat-Samii, Ryan Hensleigh, Zhenpeng Xu, and Xiaoyu Zheng., "Ultra-Lightweight Transmitarray Antenna Enabled by Charge-Programmed Three-Dimensional Multi-Material Printing," in 2022 United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), pp. 302-303, Boulder, CO, USA, 2022.
• A. Papathanasopoulos and Y. Rahmat-Samii, "Low-Profile Transmitarray for Wide-Angle Conical Scanning: Concept, Optimization and Validation," in Proceedings of the IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), pp. 1079-1080, Singapore, Singapore, December 2021.
• A. Papathanasopoulos and Y. Rahmat-Samii, "Multi-Layered Flat Meta-Lenses for Conical Beam Scanning via Optimization of Geometrical Optics," in Proceedings of the IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI), pp. 105-106, Singapore, Singapore, December 2021.
• A. Papathanasopoulos, J. Wang, and Y. Rahmat-Samii, "Transmitarray Antenna Generating Circularly Polarized Orbital Angular Momentum (OAM) Beams: Synthesis, Prototyping and Measurements," in Proceedings of the Antenna Measurement Techniques Association Symposium (AMTA), pp. 1-4, Daytona Beach, FL, USA, October 2021.
• A. Papathanasopoulos and Y. Rahmat-Samii, "A Review on Orbital Angular Momentum (OAM) Beams: Fundamental Concepts, Potential Applications, and Perspectives," in Proceedings of the XXXIVth General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS), pp. 1-4, Rome, Italy, August 2021.
• A. Papathanasopoulos, Y. Rahmat-Samii, R. Bahr, Y. Cui, and M. Tentzeris, "Introducing Inkjet Printing Technology to the Fabrication of Flat-Layered Meta-Lens Antennas," in Proceedings of the United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), pp. 49-50, Boulder, CO, January 2021.
• A. Papathanasopoulos and Y. Rahmat-Samii, "Multi-Layered Flat Metamaterial Lenses: Design, Prototyping and Measurements," in Proceedings of the Antenna Measurement Techniques Association Symposium (AMTA), pp. 1-6, Newport, RI, November 2020.
• A. Papathanasopoulos and Y. Rahmat-Samii, "Flat Meta-Lens Antenna Synthesis Via Geometrical Optics and Particle Swarm Optimization," in Proceedings of the IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting, pp. 857-858, Montreal, QC, Canada, July 2020.
• A. Papathanasopoulos and Y. Rahmat-Samii, "A Novel Deployable Compact Lens Antenna Based on Gradient-Index Metamaterials," in Proceedings of IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, pp. 625-626, Atlanta, GA, July 2019.
• A. Papathanasopoulos and Y. Rahmat-Samii, "A Systematic Approach for the design of Metallic Delay Lenses," in Proceedings of United States National Committee of URSI National Radio Science Meeting (USNC-URSI NRSM), pp. 1-2, Boulder, CO, January 2019.