[3] A. Kumar*, M. G. Krishna*, and D. Sarkar, “Python-CST-API Assisted Design of Polarisation Insensitive Pixelated Metasurfaces using BPSO and CNN,” unpublished.
[2] A. Kumar, Z. Zhang, D. Sarkar, S. Nikolaou, P. Vryonides, and D. Psychogiou, “Telegrapher Equation-Based FDTD Modelling of Multi-Port Non-Reciprocal Resonator-Based RF Circuits,” unpublished.
[1] A. Kumar and D. Sarkar, “Insights into the Non-Reciprocal Behavior of Lossy Space–Time Varying Transmission Lines Using Analytical and FDTD Modeling,” TechRxiv, Oct. 2025, doi: 10.36227/techrxiv.175977616.68271906/v1.
[6] Y. Chandrakapure*, A. Kumar*, A. C. Joshi, D. Sarkar, and A. Lakhtakia, “Automated bioinspired design of a pixelated metasurface via MATLAB–CST integration for diverse applications—The use of particle swarm optimization,” Microwave Journal, vol. 68, no. 7, pp. 85–90, 2025.
[5] A. Kumar, S. Kongari, Y. Chandrakapure, and D. Sarkar, “Multi-functional metasurface as a transmissive/reflective FSS and an on-air frequency mixer,” Scientific Reports, vol. 14, no. 1, p. 13874, 2024, doi: 10.1038/s41598-024-64306-y.
[4] A. Kumar*, Easha*, D. Sarkar, and G. Banerjee, “A compact quasi-Yagi antenna for FMCW radar-on-chip-based through-wall imaging,” International Journal of Microwave and Wireless Technologies, vol. 15, no. 9, pp. 1579–1591, 2023, doi: 10.1017/S1759078723000235.
[3] A. Kumar, J. C. Dash and D. Sarkar, "Computational Techniques for Design and Analysis of Time-Varying Capacitor Loaded Transmission Lines Using FDTD and Simulink," in IEEE Journal on Multiscale and Multiphysics Computational Techniques, vol. 7, pp. 228-235, 2022, doi: 10.1109/JMMCT.2022.3202990.
[2] A. Kumar, M. S. Rajawat, S. K. Mahto, and R. Sinha, “Metamaterial-Inspired Complementary Split Ring Resonator Sensor and Second-Order Approximation for Dielectric Characterization of Fluid,” Journal of Electronic Materials, vol. 50, no. 10, pp. 5925–5932, 2021, doi: 10.1007/s11664-021-09099-w.
[1] A. Kumar, S. K. Mahto, R. Sinha, and A. Choubey, “Dual circular slot ring triple-band MIMO antenna for 5G applications,” Frequenz, vol. 75, no. 3-4, pp. 91–100, 2021, doi: 10.1515/freq-2020-0138.
[16] M. G. Krishna, A. Kumar, S. Jain, and D. Sarkar, “Dataset Generation and Deep Learning Based Design of Transmissive Polarization Insensitive Metasurface Using Python-CST-API and PIM-CNN,” 2025 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON), Kochi, India, Dec. 2025, accepted for publication.
[15] A. Kumar, Y. Chandrakapure, A. C. Joshi, A. Lakhtakia, and D. Sarkar, “Automated Design of Pixelated Metasurfaces Using Bio-Inspired Algorithm,” 2025 IEEE Int. Symp. Antennas Propag. and North American Radio Sci. Meeting (AP-S/URSI), Ottawa, Canada, Jul. 2025.
[14] A. Kumar and D. Sarkar, "FDTD Analysis of EM Wave Propagation in a Space-Time-Modulated Lossy Transmission Line," 2025 URSI International Symposium on Electromagnetic Theory (EMTS), Bologna, Italy, 2025, pp. 1-4, doi: 10.46620/URSIEMTS25/HULZ1192.
[13] Y. Chandrakapure, A. Kumar, A. C. Joshi, A. Lakhtakia and D. Sarkar, "Automated Design of Pixelated Metasurfaces using Particle Swarm Optimization for Diverse Applications," 2024 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON), Hyderabad, India, 2024, pp. 1-4, doi: 10.1109/MAPCON61407.2024.10923570.
[12] A. Kumar, Z. Zhang, D. Sarkar, S. Nikolaou, P. Vryonides and D. Psychogiou, "FDTD Modeling of Time-Modulated Resonators-Based Bandpass Filters using Modified Telegrapher's Equations," 2024 IEEE/MTT-S International Microwave Symposium - IMS 2024, Washington, DC, USA, 2024, pp. 612-615, doi: 10.1109/IMS40175.2024.10600413.
[11] A. Kumar and D. Sarkar, "1D-FDTD Modelling of Space-Time Metamaterials using TVTL-based Equivalent Circuit," 2024 4th URSI Atlantic Radio Science Meeting (AT-RASC), Meloneras, Spain, 2024, pp. 1-4, doi: 10.46620/URSIATRASC24/BJWO7445.
[10] Y. Chandrakapure, A. C. Joshi, A. Kumar and D. Sarkar, "Investigations on Reconfigurable Metasurface Absorber for Wireless Power Transfer," 2024 4th URSI Atlantic Radio Science Meeting (AT-RASC), Meloneras, Spain, 2024, pp. 1-4, doi: 10.46620/URSIATRASC24/BMLH5134.
[9] S. Kongari, A. Kumar, Y. Chandrakapure and D. Sarkar, "Polarisation Insensitive Active FSS for EM Shielding," 2024 4th URSI Atlantic Radio Science Meeting (AT-RASC), Meloneras, Spain, 2024, pp. 1-4, doi: 10.46620/URSIATRASC24/EWAS4810.
[8] A. Kumar, D. Sarkar and D. Psychogiou, "FDTD Modelling of RF Circuits Based on Lumped Components and Transmission Lines Using Modified Telegrapher's Equations," 2024 18th European Conference on Antennas and Propagation (EuCAP), Glasgow, United Kingdom, 2024, pp. 1-5, doi: 10.23919/EuCAP60739.2024.10501369.
[7] Y. Chandrakapure, R. Malleboina, A. Kumar and D. Sarkar, "A Multi-State Reconfigurable Intelligent Surface Based on Anomalous Reflectors for Communication and Radar Applications," 2024 National Conference on Communications (NCC), Chennai, India, 2024, pp. 1-6, doi: 10.1109/NCC60321.2024.10485868.
[6] Y. Chandrakapure, A. Kumar, Easha, D. Sarkar and G. Banerjee, "Time-Modulated Metasurface for Spoofing Doppler Radar," 2023 IEEE Microwaves, Antennas, and Propagation Conference (MAPCON), Ahmedabad, India, 2023, pp. 1-4, doi: 10.1109/MAPCON58678.2023.10464113.
[5] A. Kumar and D. Sarkar, "FDTD Analysis of Space-time Metamaterials using Modulated TVTLs for Frequency Translation, Mixing and Non-reciprocity," 2023 53rd European Microwave Conference (EuMC), Berlin, Germany, 2023, pp. 311-314, doi: 10.23919/EuMC58039.2023.10290288.
[4] A. Kumar, J. C. Dash, and D. Sarkar, “Space-Time Engineered Metamaterials: Computational Electromagnetic Analysis and Design using TVTLs,” 2022 URSI Regional Conference on Radio Science (URSI-RCRS), 2022. [extended abstract] URL:https://www.ursi.org/proceedings/2022/RCRS2022/papers/URSI_abstract.pdf
[3] A. Kumar, J. Chandra Dash and D. Sarkar, "FDTD Analysis of Transmission Line Loaded with Time-Varying Shunt Capacitors for Mixer Applications," 2022 IEEE International Conference on Electronics, Computing and Communication Technologies (CONECCT), Bangalore, India, 2022, pp. 1-6, doi: 10.1109/CONECCT55679.2022.9865819.
[2] A. Kumar, J. C. Dash and D. Sarkar, "Frequency Translation of EM Waves using Time-Varying Dielectrics: Insights on Slab-Width and Duration of Permittivity Variation using FDTD," 2021 IEEE Indian Conference on Antennas and Propagation (InCAP), Jaipur, Rajasthan, India, India, 2021, pp. 316-319, doi: 10.1109/InCAP52216.2021.9726387.
[1] A. Kumar, S. K. Mahto and R. Sinha, "Y-Shaped Antenna for 5G Enabled Gadgets and its MIMO for Smartphone Applications," 2020 URSI Regional Conference on Radio Science ( URSI-RCRS), Varanasi, India, 2020, pp. 1-4, doi: 10.23919/URSIRCRS49211.2020.9113521.