Journal Publications

1. A. Sawant, I. Lee, and E. M. Choi, "Investigation of the origin of amplitude non-uniformity in vortex beams transformed by a transmissive structure", IEEE Transactions on Antennas and Propagation , vol.70 ,pp.4623-4631, [2022]. , https://doi.org/10.1109/TAP.2022.3140520

2. A. Sawant, I. Lee, B.C. Jung and E. M. Choi, "Ultimate capacity analysis of orbital angular momentum channels", IEEE Wireless Communications , vol.28 ,pp.90-96, [2021]. , https://doi.org/10.1109/MWC.001.2000258

3. I. Lee, A. Sawant, J. Shin, and E. Choi, "Accurate gyrotron performance prediction based on full 3-d magnetic field and electron beam information altered by nonideal factors", IEEE Transactions on Electron Devices , vol.68 ,pp.1276-1283, [2021]. , https://doi.org/10.1109/TED.2021.3053512

4. I. Lee, A. Sawant, and E. M. Choi, "High-directivity orbital angular momentum antenna for millimeter-wave wireless communications", IEEE Transactions on Antennas and Propagation , vol.69 ,pp.4189-4194, [2021]. , https://doi.org/10.1109/TAP.2020.3044602

5. A. Sawant, D. Kwak, I. Lee, M. Chung, and E. M. Choi, "Stand-off radiation detection techniques", Review of Scientific Instruments , vol.91 ,pp.071501 [2020]. , https://doi.org/10.1063/1.5134088

6. M. S. Choe, A. Sawant, and E. Choi, "High-density plasma diagnosis using quasi-optical millimeter-wave systems", IEEE Transactions on Plasma Science , vol.48 ,pp.3935-3941, [2020]. , https://doi.org/10.1109/TPS.2020.3026016

7. H. Chung, D. Kim, A. Sawant, I. Lee, E. M. Choi, and J. Lee, "Generation of E-band metasurface-based vortex beam with reduced divergence angle", Scietific Reports , vol.10 ,pp.8289 [2020]. , https://doi.org/10.1038/s41598-020-65230-7

8. A. Sawant and E. M. Choi, "Development of the full package of gyrotron simulation code", Journal of the Korean Physical Society , vol.73 ,pp.1750-1759, [2018]. , https://link.springer.com/article/10.3938/jkps.73.1750

9. I. Lee, A. Sawant, J. Shin, and E. M. Choi, "Self-driving energy-recirculating micromachined G-band folded-waveguide traveling-wave tube oscillator", IEEE Transactions on Electron Devices , vol.65 ,pp.3492-3499, [2018]. , https://doi.org/10.1109/TED.2018.2844822

10. I. Lee, A. Sawant, M. S. Choe, D.-J. Lee, and E. M. Choi, "Accurate identification of whispering gallery mode patterns of gyrotron with stabilized electro-optic imaging system", Physics of Plasmas , vol.25 ,pp.013116 [2018]. , https://doi.org/10.1063/1.5017558

11. A. Sawant and E. M. Choi, "Competition-free second harmonic mode THz orbital angular momentum gyrotron with dual-mode operation by a perturbed cavity", Physics of Plasmas , vol.24 ,pp.113109 [2017]. , https://doi.org/10.1063/1.5002732

12. A. Sawant, M. S. Choe, M. Thumm and E. M. Choi, "Orbital angular momentum (OAM) of rotating modes driven by electrons in electron cyclotron masers", Scietific Reports , vol.7 ,pp.3372 [2017]. , https://doi.org/10.1038/s41598-017-03533-y

13. A. Sawant, D. Yu, D. Kim, M. S. Choe, and E. M. Choi, "Generation and validation of topological charges of high-power gyrotron orbital angular momentum beams from phase retrieval algorithm", IEEE Transactions on Terahertz Science and Technology , vol.7 ,pp.164-171, [2017]. , https://doi.org/10.1109/TTHZ.2016.2637868

14. D. Kim, D. Yu, A. Sawant, M. S. Choe, I. Lee, S. G. Kim, and E. M. Choi, "Remote detection of radioactive material using high-power pulsed electromagnetic radiation", Nature Communications , vol.8 ,pp.15394 [2017]. , https://doi.org/10.1038/ncomms15394

15. M. S. Choe, A. Sawant, K.-S. Lee, N. E. Yu, and E. M. Choi, "Measuring the carrier lifetime by using a quasi-optical millimeter-and thz-wave system", Applied Physics Letters , vol.110 ,pp.074101 [2017]. , https://doi.org/10.1063/1.4976315

16. D. Kim, M. S. Choe, D. Yu, A. Sawant, and E. M. Choi, "A method for pulse shortening of high-power millimeter waves using plasma breakdown", IEEE Transactions on Plasma Science , vol.44 ,pp.1320-1323, [2016]. , https://doi.org/10.1109/TPS.2016.2580706

17. D. Kim, S. G. Kim, A. Sawant, D. Yu, M. S. Choe, and E. M. Choi, "Study on statistical breakdown delay time in argon gas using a w-band millimeter-wave gyrotron", Physics of Plasmas , vol.23 ,pp.043505 [2016]. , https://doi.org/10.1063/1.4945749

18. S. G. Kim, A. Sawant, I. Lee, D. Kim, M. Choe, J.-H. Won, J. Kim, J. So, W. Jang, and E. M. Choi, "System development and performance testing of a W-band gyrotron", Journal of Infrared, Millimeter, and Terahertz Waves , vol.37 ,pp.209 [2015]. , https://doi.org/10.1007/s10762-015-0221-1

19. A. Sawant, S. G. Kim, M.-C. Lin, J. H. Kim, Y. Hong, J. So, and E. M. Choi, "Validation of 3-D time domain particle-in-cell simulations for cold testing a W-band gyrotron cavity", IEEE Transactions on Plasma Science , vol.42 ,pp.3989-3995, [2014]. , https://doi.org/10.1109/TPS.2014.2366191

20. A. Sawant, P. Jain, S. Illy, and M. V. Kartikeyan, "A triode-type magnetron injection gun for a dual frequency regime gyrotron operating at 42/84 GHz", IEEE Transactions on Plasma Science , vol.41 ,pp.3115-3121, [2013]. , https://doi.org/10.1109/TPS.2013.2282467

Conference Publications

1. A. Sawant, I. Lee, and E. Choi, "Orbital angular momentum multiplexing for a wireless backhaul communication system", IEEE Wireless Communications and Networking Conference Workshops (WCNCW) , IEEE [2020].

2. A. Sawant, I. Lee, M. S. Choe, and E. M. Choi, "Development of the second harmonic 190 GHz gyrotron for OAM communication", 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [2019].

3. A. Sawant, I. Lee, and E. M. Choi, "Development of the second harmonic dual mode gyrotron for OAM beam generation", IEEE International Vacuum Electronics Conference [2019].

4. M. Thumm, A. Sawant, M. Choe, and E. M. Choi, "The gyrotron–a natural source of high-power orbital angular momentum millimeter-wave beams", EPJ Web of Conferences , vol.149 ,pp.04014 [2017].

5. A. Sawant, M. S. Choe, M. Thumm, and E. M. Choi, "Orbital angular momentum of gyrotron modes", 42nd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [2017].

6. A. Sawant, D. Yu, D. Kim, M. S. Choe, and E. M. Choi, "Phase retrieval of high-power gyrotron orbital angular momentum beams", Eighteenth International Vacuum Electronics Conference (IVEC) [2017].

7. A. Sawant, M. S. Choe, and E. M. Choi, "Proposal of mode selection criterian for advanced KDEMO gyrotron", EPJ Web of Conferences , vol.147 [2017].

8. M. S. Choe, A. Sawant, and E. Choi, "The experimental verification of Gaussian beam coupling for ECH transmission line at 400 GHz", EPJ Web of Conferences [2017].

9. I. Lee, A. Sawant, J. So, Y. Hong, and E. M. Choi, "Design study of an energy-recirculating G-band self-driving folded waveguide traveling-wave tube", IEEE International Vacuum Electronics Conference (IVEC) [2016].

10. A. Sawant and E. M. Choi, "Dual band operation of a photonic band gap cavity for 400 GHz gyrotron", IEEE International Vacuum Electronics Conference (IVEC) [2016].

11. A. Sawant, J. H. Kim, Y. Hong, J. So, and E. M. Choi, "Comparative study on PIC simulations of the gyrotron cavity", 39th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz) [2014].

12. P. C. Kalaria, A. Sharma, A. Sawant, J. Malik, S. Rao, M. V. Kartikeyan, and M. Thumm, "Mode purity estimation of the gyrotron rf beam", 38th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) [2013].