Nacer Chahat

Dr. Nacer Chahat was born in Angers, France. Over ten years of experience in design, analysis, and development of antenna for projects ranging from UHF to THz frequencies for communications, RADAR, and imaging systems. His expertise includes satellite communications antennas (for spacecraft, CubeSat, Lander, and Rover), wearable and flexible antennas for communications and biotelemetry, and antennas for remote sensing and radio astronomy instruments. He also specialized in very accurate EMI/EMC analysis for large Spacecraft. He is the project EMI/EMC System Engineer on SWOT. His passion consists on developing new technologies to solve complex problems or to open up new paradigms. He is the Payload System Engineer for the SWOT mission.

He is the author of the book “Cubesat antenna design” published by Wiley – IEEE Press in January 2021. He authored and co-authored over 100 technical journal articles and conference papers and has written 4 book chapters. In the last decade at JPL, he was awarded several patents. Since he joined NASA’s Jet Propulsion Laboratory, he worked on several flight projects: Mars Helicopter, Mars 2020, SWOT, Europa Clipper, NiSAR, MarCO, NeaScout, Lunar Flashlight, RainCube, LunaH-map, Lunar IceCube, BioSentinel, CUSP, and INCUS. He is Principal Investigator (PI) and Co-Investigator (Co-I) on multiple antenna and radar research and development efforts.

Some of his main contributions to NASA missions are (1) the design of the Raincube Ka-band deployable mesh reflector that has successfully deployed in space and generated critical science, (2) Mars Cube One X-band antennas that have enabled real-time communication during Insight entry, descent, and landing, (3) the highly efficient Europa lander antenna enabling direct to Earth communication link from Europa, and (4) development of highly accurate surface communication tools for the Mars Helicopter mission which allowed to extend the helicopter mission life significantly.

He became the youngest IEEE Fellow in 2021 for his contribution to “CubeSat and Spacecraft antennas for inter-planetary missions". He is a black belt in judo and enjoys playing and coaching soccer.


Education: 

  • Ph.D. in Signal processing and Telecommunication, IETR, University of Rennes 1, Rennes, France, Oct. 2012 (Summa cum laude). Dissertation topic: “Antenna, propagation, and interaction with the body for body-centric wireless communications at microwaves and millimeter-waves”.

  • M.Sc. in Electrical Engineering and Radio Communications, Ecole Supérieure d’Ingénieurs de Rennes, University of Rennes 1, Rennes, France, Sept. 2009. Valedictorian and summa cum laude.

  • M.Sc. in Telecommunication, University of Rennes 1, Rennes, France, Sept. 2009


Research Interests: 
  • EMI/EMC analysis for large spacecraft
  • Deployable or integrated antennas for CubeSat
  • Spacecraft antennas
  • THz antennas
  • Horn antenna feeds for sub-mm astronomy and cosmic background experiments

Professional Experience: 
  • Senior Antenna / Microwave Engineer, at NASA Jet Propulsion Laboratory, Pasadena, CA, since 2014.
  • PostDoctoral Fellow at NASA Jet Propulsion Laboratory, Pasadena, CA, 2013.
  • Lecturer in Electromagnetism at the University of Rennes 1, Rennes, France, 2009-2012.
  • Undergraduate Student Researcher at the Graduate School of Engineering, Chiba University, Japan. Research project: Design and characterization of a UWB antenna for on-body communications, Mar.-Aug. 2009.

Selected Awards: 
  • IEEE Fellow, 2022. Link.
  • Mars Helicopter team awards: National Space Society (NSS) Awards (2022), IEEE Spectrum Emerging Technology Award (2022), Robert J. Collier Trophy (2022), and National Air & Space Museum Collins Award for Current Achievement (2022).
  • WAMS best paper award, 2022
  • IET Dr. Sudhalar Rao Award, 2021
  • JARS Best Paper Award for Photo-Optical Instrumentation and Design (2019). Link.
  • NASA Early Career Achievement Medal, NASA, 2018.
  • The Future Technology Leader Award, Engineers’ Council, 2018. Link.
  • George Herzl Award (2018)
  • The Lew Allen Award for Excellence, NASA Jet Propulsion Laboratory, 2017. Link.
  • The IEEE Sergei A. Schelkunoff award, IEEE, 2017. Link.
  • Prix Bretagne Jeune Chercheur (French Early Career Award for Researcher) for his significant scientific contribution in his early career, Britanny, France, 2015. Link.
  • IEEE Senior member, 2015.
  • The Airbus Group Foundation's Best Thesis Prize in France, Airbus, 2013, Link.
  • Best Ph.D. thesis in FRANCE in Electrical Engineering, club EEA (Enseignants et des chercheurs en Electronique, Electrotechnique et Automatique), 2013.
  • Best Ph.D. thesis of the University of Rennes 1, Fondation Rennes 1, 2013, Link.
  • IEEE Antennas and Propagation Society Doctoral Research Award, IEEE, 2012,
  • CST University Publication Award, CST, 2011, Link.
  • Best student paper award of the 33rd Bioelectromagnetics Society Annual Meeting in Halifax (BEMS 2011), Link.

Selected Publications: 

Book

N. Chahat, “CubeSat Antenna Design,” ISBN: 978-1-119-69258-4, Wiley-IEEE Press, January 2021.

Book Chapter

  1. G. Chattopadhyay, M. Alonso Del Pino, N. Chahat, D. Gonzalez, and T. Reck, “Terahertz antennas and feeds,” Chapter 11 in “Aperture antennas for mm and sub-mm wave applications”, Springer, 2017. Link.
  2. M. Zhadobov, C. Leduc, A. Guraliuc, N. Chahat, and R. Sauleau, “Body-centric wireless communication and networks,” Chapter 5 in “Advances in Body-Centric Wireless Communication: Applications and State-of-the-art”, ISBN: 978-1-84919-989-6, The Institution of Engineering and Technology (IET), 2016. Link.
  3. B3.   N. Chahat, A. Tang, G. Valerio, M. Zhadobov, Anda Guraliuc, and R. Sauleau, “Antennas, Phantoms, and Body-centric propagation at millimeter waves,” in “Electromagnetics of Body-Area Networks: Antennas, Propagation, and RF Circuits,” ISBN: 978-1-119-02946-5, Wiley/IEEE Press, 2016. Link.
  4. B4.   N. Chahat, M. Zhadobov, and R. Sauleau, “Progress in compact antennas,” Chapter 6: “Antennas for body-centric wireless communications at millimeter wave frequencies”, ISBN 980-953-307-1085-4, Intech 2014. Link.

 

Patents

  1. Orthogonally Selected Multi-Band Metasurface Antenna for Next Generation Telecommunication and Remote Sensing Applications, CIT-8923-P, filled on Nov. 21, 2022.
  2. Metal-only flat metasurface antenna for single or multiple beams, CIT-8849-P, filled on July 7, 2022.
  3. High efficiency dual-band circularly-polarized antenna for harsh environment for telecommunication, US 10,680,345 B2, Issue date on June 9, 2020.
  4. Deployable reflectarray antenna, US #10,276,926 B2, Issue date on 4/30/2019.
  5. P5.   Parabolic deployable antenna, US #2006/0352022, Issue date: Jan 1, 2019. Licensed.
  6. P6.   Interconnect between a waveguide and a dielectric waveguide comprising an impedance matched dielectric lens, US #94,788,42 B1. Issue date: October 25, 2016.
  7. Dielectric waveguides splitter and hybrid/isolator for bidirectional link, US #94,788,43 B2. Issue date: October 25, 2016.
  8. P8.   Microwave reflector link, and CDMA-spread spectrum reflector apparatus for reduction of unmodulated ambient blockers in reflected data links, US 10,763,587 B2, Issue date: Sept 1 2020.

 

Journal papers

  1. O. O. Sy et al., "Scientific Products From the First Radar in a CubeSat (RainCube): Deconvolution, Cross-Validation, and Retrievals," IEEE Transactions on Geoscience and Remote Sensing, vol. 60, pp. 1-20, 2022.
  2. N. Chahat, "An Antenna Made for an Icy, Radioactive Hell: JPL's All-Metal Design Can withstand Europa's Brutal Environment," IEEE Spectrum, vol. 58, no. 8, pp. 34-39, August 2021.
  3. O. Yurduseven, C. Lee, D. Gonzalez-Ovejero, M. Ettorre, R. Sauleau, G. Chattopadhyay, V. Fusco, N. Chahat, “Multi-beam Si/GaAs holographic metasurface antenna at W-band,” IEEE Transactions on Antennas and Propagation, accepted, 2020.
  4. N. Chahat, J. Miller, E. Decrossas, L. McNally, M. Chase, C. Jin, and C. Duncan, "The Mars Helicopter Telecommunication Link: Antennas, Propagation, and Link Analysis," IEEE Antennas and Propagation Magazine, vol. 62, no. 6, pp. 12-22, Dec. 2020. Link.
  5. N. Chahat, J. Sauder, M. Mitchell, N. Beidleman and G. Freebury, "One-Meter Deployable Mesh Reflector for Deep-Space Network Telecommunication at X-Band and Ka-Band," in IEEE Transactions on Antennas and Propagation, vol. 68, no. 2, pp. 727-735, Feb. 2020. Link.
  6. N. Chahat et al., "Advanced CubeSat Antennas for Deep Space and Earth Science Missions: A review," in IEEE Antennas and Propagation Magazine, vol. 61, no. 5, pp. 37-46, Oct. 2019. Link.
  7. E. Peral, S. Tanelli, S. Statham, S. Joshi, T. Imken, D. Price, J. Sauder, N.Chahat, A. Williams, “Raincube: the first ever radar measurements from a cubesat in space,” Journal of Applied Remote Sensing, 2019, vol. 13(3), 032504, June 2019. Link.
  8. N. Chahat, B. Cook, H. Lim and P. Estabrook, "All-Metal Dual-Frequency RHCP High-Gain Antenna for a Potential Europa Lander," IEEE Transactions on Antennas and Propagation, vol. 66, no. 12, pp. 6791-6798, Dec. 2018. Link.
  9. D. González-Ovejero, N. Chahat, R. Sauleau, G. Chattopadhyay, S. Maci and M. Ettorre, "Additive Manufactured Metal-Only Modulated Metasurface Antennas," IEEE Transactions on Antennas and Propagation, vol. 66, no. 11, pp. 6106-6114, Nov. 2018. Link.
  10. N. Chahat, “A mighty antenna from a tiny CubeSat grows,” IEEE Spectrum, vol. 55, no. 2, pp. 32-37, Jan. 2018. Link.
  11. N. Chahat, R. E. Hodges, J. Sauder, M. Thomson, and Y. Rahmat-Samii, “Deep Space Network Telecommunication CubeSat Antenna: Using the deployable Ka-band mesh reflector antenna,” IEEE Antenna Propag. Magazine, vol. 4, April 2016. Link.
  12. R. E. Hodges, N. Chahat, D. J. Hoppe, and J. Vacchione, “A Deployable High-Gain Antenna Bound for Mars: Developing a new folded-panel reflectarray for the first CubeSat mission to Mars,” IEEE Antenna Propag. Magazine, vol. 4, April 2016. Link.
  13. N. Chahat, L. R. Amaro, J. Harrell, C. Wang, P. Estabrook and S. A. Butman, "X-Band Choke Ring Horn Telecom Antenna for Interference Mitigation on NASA’s SWOT Mission," IEEE Transactions on Antennas and Propagation, vol. 64, no. 6, pp. 2075-2082, June 2016. Link.
  14. N. Chahat, J. Sauder, M. Thomson, R. Hodges, and Y. Rahmat-Samii, “CubeSat Deployable Ka-band reflector antenna development for Earth Science Mission,” IEEE Trans. Antennas and Propagation, vol. 64, no. 6, pp. 2083-2093, June 2016. Link.
  15. N. Chahat, T. Reck, C. Jung-Kubiak, T. Nguyen, R. Sauleau, and G. Chattopadhyay, “1.9 THz multi-flare angle horn optimization for space instruments,” IEEE Trans. Terahertz Science Technology, vol. 5, no. 6, pp. 914–921, Nov. 2015. Link.
  16. N. Chahat, A. Tang, C. Lee, R. Sauleau, and G. Chattopadhyay, “Efficient CMOS Systems with Beam-Lead Interconnects for Space Instruments,” IEEE Transactions on Terahertz Science and Technology, vol. 5, no. 4, pp. 637-644, July 2015. Link.
  17. A. R. Guraliuc, N. Chahat, C. Leduc, M. Zhadobov, and R. Sauleau, “End-fire antenna for BAN at 60 GHz: impact of bending, on-body performances, and study of an off-body scenario,” Electronics, vol. 3, no. 1, 2014.
  18. A. R. Guraliuc, M. Zhadobov, G. Valerio, N. Chahat, and R. Sauleau, “Effect of Textile on the Propagation Along the Body at 60 GHz,” IEEE Trans. Antennas and Propagation, vol. 62 no. 3, Mar. 2014.
  19. A. Pellegrini, A. Brizzi, L. Zhang, K. Ali, Y. Hao, X. Wu, C. C. Constantinou, Y. Nechayev, P. S. Hall, N. Chahat, M. Zhadobov, and R. Sauleau, “Antennas and propagation for body centric wireless communications at millimeter wave frequencies: a review,” IEEE Antennas and Propagation Magazine, vol. 55, no. 4, Nov. 2013.
  20. N. Chahat, G. Valerio, M. Zhadobov, and R. Sauleau, “On-body propagation at 60 GHz,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 4, pp. 1876–1888, Apr. 2013.
  21. N. Chahat, M. Zhadobov, and R. Sauleau, “60-GHz textile antenna array for body-centric communications,” IEEE Transactions on Antennas and Propagation, vol. 61, no. 4, pp. 1816–1824, Apr. 2013.
  22. N. Chahat, M. Zhadobov, L. Le Coq, S. Alekseev, and R. Sauleau, “Characterization of the Interactions between a 60-GHz Antenna and the Human Body in an Off-Body Scenario,” IEEE Transactions on Antennas and Propagation, vol. 60, no. 12, pp. 5958–5965, Dec. 2012.
  23. N. Chahat, M. Zhadobov, and R. Sauleau, “Wearable end-fire textile antenna for on-body communications at 60 GHz,” IEEE Antennas Wirel. Propag. Letters, vol. 11, pp. 799–802, 2012.
  24. N. Chahat, M. Zhadobov, and R. Sauleau, “Broadband tissue-equivalent phantom for BAN applications at millimeter waves,” IEEE Transactions on Microwave Theory and Techniques, vol. 60, no. 7, pp. 2259–2266, Jul. 2012.
  25. N. Chahat, M. Zhadobov, S. Alekseev, and R. Sauleau, “Human skin-equivalent phantom for on-body antenna measurements in the 60-GHz band,” Electronics Letters, vol. 48, no. 2, pp. 67–68, Jan. 2012.
  26. N. Chahat, M. Zhadobov, R. Sauleau, and S. Alekseev. “New method for determining dielectric properties of skin and phantoms at millimeter waves based on heating kinetics,” IEEE Transactions on Microwave Theory and Techniques, vol. 60, no. 3, pp. 827–832, March 2011.
  27. L.-R. Harris, M. Zhadobov, N. Chahat and R. Sauleau, “Electromagnetic dosimetry for adult and child models within a car: multi-exposure scenarios,” International Journal of Microwave and Wireless Technologies, vol. 3, no. 6, Dec. 2011.
  28. N. Chahat, M. Zhadobov, R. Augustine, and R. Sauleau, “Human skin permittivity models for the millimetre-wave range,” Electronics Letters, vol. 47, no. 7, pp.427–428, March 2011.
  29. M. Zhadobov, N. Chahat, R. Sauleau, C. Le Quement, Y. Le Dréan, “Millimeter-wave interactions with the human body : state of knowledge and recent advances,” International Journal of Microwave and Wireless Technologies, vol. 3, no. 2, pp. 237-247, April 2011.
  30. N. Chahat, M. Zhadobov, R. Sauleau, and K. Ito, “A compact UWB antenna for on-body applications,” IEEE Transactions on Antennas and Propagation, vol. 59, no.4, Apr. 2011.

 

Published Proceedings (international conference)

  1. N. Chahat, J. Sauder, M. Lane, E. Decrossas, G. Gupta, P. Focardi, N. Beidleman, G. Freebury, M. Thomson, and S. Tanelli, “Multi-beam 1.6m Ka-band deployable mesh reflector antenna concept for Incus,” IEEE Antenna and Propagation Symposium URSI 2022, Denver, Colorado, USA, 10-15 July 2022.
  2. G. Gupta, E. Decrossas, P. Focardi, and N. Chahat, “All-metal patch circular polarized fan-beam antennas for potential Europa lander,” IEEE Antenna and Propagation Symposium URSI 2022, Denver, Colorado, USA, 10-15 July 2022.
  3. G. Gupta, E. Decrossas, and N. Chahat, “All-metal dual band circular polarized UHF patch antenna,” IEEE Wireless Antenna and Microwave Symposium, 5-8 June 2022, Rourkela, India.
  4. G. Gupta, P. Estabrook, P. Focardi, E. Decrossas, and N. Chahat, “All-metal patch dual-frequency dual-circular polarized fan-beam antenna,” IEEE Wireless Antenna and Microwave Symposium, 5-8 June 2022, Rourkela, India.
  5. G. Gupta, M. Arya, A. Goel, S.  Bandyopadhyay, P. Goldsmith, P. Mcgarey, J. Lazio, and N. Chahat, “Detector development for the lunar crater radio telescope,” IEEE Wireless Antenna and Microwave Symposium, 5-8 June 2022, Rourkela, India.
  6. M. Lavalle et al., "Distributed Aperture Radar Tomographic Sensors (DARTS) to Map Surface Topography and Vegetation Structure," 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, pp. 1090-1093, 2021.
  7. S. Bandyopadhyay et al., "Conceptual Design of the Lunar Crater Radio Telescope (LCRT) on the Far Side of the Moon," 2021 IEEE Aerospace Conference (50100), 2021.
  8. J. Sauder, N. Chahat, B. Hirsch, R. Hodges, E. Peral, Y. Rahmat-Samii, and M. Thomson, “Integration, Test, and On-Orbit Operation of a Ka-band Parabolic Deployable Antenna (KaPDA) for CubeSats,” AIAA Scitech 2020 Forum, Orlando, FL, 6-10 Jan. 2020.
  9. E. Peral, S. Tanelli, S. Statham, S. Joshi, E. Im, T. Imken, D. Price, J. Sauder, N. Chahat, and A. Williams, "Raincube – A New Paradigm to Observe Weather Processes," IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, Yokohama, Japan, 28 Jul. - 2 Aug. 2019, pp. 4978-4981, Yokohama, Japan.
  10. E. Peral, S. Tanelli, S. Statham, J. Sauder, S. Joshi, D. Price, T. Imken,  N. Chahat, and A. Williams, " RainCube, the First Spaceborne Precipitation Radar in a 6U CubeSat," 33rd Annual AIAA/USU Conference on Small Satellites, 5-8 Aug. 2019, Logan, UT.
  11. O. Yurduseven, C. Lee, N. Chahat, D. Gonzalez-Ovejero, M. Ettorre, R. Sauleau, and G. Chattopadhyay, "Design of a Quasi-Optical Si/GaAs W-Band Beam-Forming Metasurface Antenna,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July 2019.
  12. N. Chahat, J. L. Wolff, B. Cook, and P. Estabrook, "All-Metal Dual-Frequency Circularly Polarized High Gain Antenna for potential Europa Lander,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July 2019.
  13. E. Decrossas, P. Walkemeyer, S. Velasco, N. Chahat, "Deployable Circularly Polarized UHF Printed Loop Antenna for Mars Cube One (MarCO) CubeSat,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July 2019.
  14.  N. Chahat, E. Decrossas, and T. Cwik, "A Review of JPL Deployable CubeSat Antennas,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July 2019.
  15. D. Gonzalez Ovejero, A. Mahmoud, X. Morvan, M. Ettorre, R. Sauleau, S. Maci, G. Chattopadhyay, N. Chahat, “Metal-only Modulated Metasurface Antenna for Cubesat Platforms,” IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July 2019.
  16. N. Chahat, J. Sauder, M. Mitchell, N. Beidleman, and Gregg Freebury, “X/Ka-band One-Meter Deployable Mesh Reflector for Deep Space Network Telecom,” 13th European Conference on Antennas and Propagation, 31 March - 5 April 2019, Krakow, Poland.
  17. N. Chahat, “All-metal Dual Frequency RHCP High Gain Antenna for the Extreme Environments of a Potential Europa Lander,” 13th European Conference on Antennas and Propagation, 31 March - 5 April 2019, Krakow, Poland.
  18. N. Chahat, E. Thiel, M. Arya, J. Sauder, and T. Cwik, “Deployable One-Meter Reflectarray for 6U-Class CubeSats,” 13th European Conference on Antennas and Propagation, 31 March - 5 April 2019, Krakow, Poland.
  19. S. Tanelli, E. Peral, T. Imken, S. Statham, J. Sauder, D. Price, N. Chahat, S. Joshi, A. Williams, “RainCube, the First Spaceborne Precipitation Radar in a 6U CubeSat: From Concept to Mission,” Ninth Conference on Transition of Research to Operations, Phoenix, Az, January 7, 2019.
  20. G. Chattopadhyay, M. Alonso-delPino, C. Jung-Kubiak, T. Reck, C. Lee, N. Chahat, S. Rahiminejad, D. Gonzalez-Ovejero, “Terahertz antenna technologies for space science applications,” International Symposium on Antennas and Propagation (ISAP), Busan, Korea (South), 2018.
  21. N. Chahat, P. Estabrook, B. Cook, “All-Metal Dual-Frequency Circularly Polarized High Gain Antenna for potential Europa Lander,” 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 8-13 July 2018, Boston, Massachusetts.
  22. N. Chahat, P. Estabrook, B. Cook, “All-metal Dual Frequency RHCP High Gain Antenna for the Extreme Environments of a Europa Lander,” 12th European Conference on Antennas and Propagation (EuCAP 2018), 9-13 April 2018, London.
  23. G. Chattopadhyay et al., "Antennas for space instruments from GHz to THz," 12th European Conference on Antennas and Propagation (EuCAP 2018), London, 2018.
  24. E. Peral et al., "The Radar-in-a-Cubesat (RAINCUBE) and Measurement Results," IGARSS 2018 IEEE International Geoscience and Remote Sensing Symposium, pp. 6297-6300, Valencia, 2018.
  25. P. S. Narvaez, N. Chahat and E. C. Gonzales, "Development of spacecraft radiated susceptibility RS103 requirements from modeling methods," 2018 IEEE International Symposium on Electromagnetic Compatibility and 2018 IEEE Asia-Pacific Symposium on Electromagnetic Compatibility (EMC/APEMC), pp. 171-176, Singapore, 2018.
  26. D. Gonzalez-Olejero, X. Morvan, N. Chahat, G. Chattopadhyay, R. Sauleau, M. Ettorre, “Metallic Metasurface Antennas for Space,” 12th European Conference on Antennas and Propagation (EuCAP 2018), 9-13 April 2018, London.
  27. G. Chattopahyay, N. Chahat, D. Gonzalez-Olejero, “Antennas for Space Instruments from GHz to THz,“ 12th European Conference on Antennas and Propagation (EuCAP 2018), 9-13 April 2018, London.
  28. M. Ogut et al., "Command and data handling (C&DH) subsystem for the tropospheric water and cloud ice (twice) 6u-class satellite instrument," 2017 IEEE International Geoscience and Remote Sensing Symposium (IGARSS) , pp. 2744-2747, Fort Worth, TX, 2017.
  29. E. Peral, T. Imken, J. Sauder, S. Statham, S. Tanelli, D. Price, and N. Chahat, “RainCube, a Ka-band precipitation Radar in a 6U Cubesat,”  31st Annual AIAA / USUConference on Small Satellites, Logan, UT, 5-10 Aug. 2017.
  30. N. Chahat, G. Agnes, J. Sauder and T. Cwik, "One meter deployable reflectarray antenna for earth science radars," 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, San Diego, CA, 2017, pp. 245-246.
  31. A. Freeman and N. Chahat, “S-Band Smallsat InSAR Constellation for Surface Deformation Science,” IEEE Radar Conference, Seattle, Washington, May 8-12, 2017.
  32. N. Chahat, J. Sauder, G. Agnes, and T. Cwik, “One meter deployable reflectarray antenna for Earth Science radars,” 11th European Conference on Antennas and Propagation, Paris, France, 19-24 March 2017.
  33. N. Chahat, J. Sauder, M. Thomson, Y. Rahmat-Samii, and R. Hodges, “Ka-band Deployable Mesh Reflector Antenna Compatible with the Deep Space Network,” 11th European Conference on Antennas and Propagation, Paris, France, 19-24 March 2017.
  34. S. C. Reising et al., "Tropospheric water and cloud ICE (TWICE) millimeter and submillimeter-wave radiometer instrument for 6U-Class nanosatellites," 2016 41st International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Copenhagen, 2016.
  35. N. Chahat, “Enabling new class of Earth Science and deep space NASA missions using innovative deployable antennas,” U.S. National Academy of Sciences, Arab-American Frontiers of Science (Invited), Abu Dhabi, UAE, November 5-7, 2016.
  36. R. E. Hodges, N. Chahat, D. J. Hoppe and J. D. Vacchione, "The Mars Cube One deployable high gain antenna," 2016 IEEE International Symposium on Antennas and Propagation (APSURSI), Fajardo, 2016, pp. 1533-1534.
  37. N. Chahat, J. Sauder, M. Thomson, R. Hodges, and Y. Rahmat-Samii, “Ka-band High-Gain Mesh Deployable Reflector Antenna Enabling the First Radar in a CubeSat: RainCube,” Davos, Switzerland, 10-15 April 2016.
  38. N. Chahat, J. Sauder, R. Hodges, M. Thomson, and Y. Rahmat-Samii,  “Earth Science RADAR cubesat deployable Ka-band mesh reflector antenna,” APS/URSI 2016, Fajardo, Puerto Rico, June-July 2016.
  39. N. Chahat, J. Sauder, R. E. Hodges, and M. Thomson, “Ka-band High-Gain Deployable Reflector Antenna Enabling the first Radar in a CubeSat: RainCube,” Interplanetary Small Satellite Conference 2016, Pasadena, CA, 2016.
  40. J. Sauder, N. Chahat, R. Hodges, E. Peral, Y. Rahmat-Samii, and M. Thomson, “Designing, building, and testing a mesh Ka-band parabolic deployable antenna (KaPDA) for CubeSats,” 54th AIAA Aerospace Sciences Meeting, San Diego, California, 4-8 January 2016.
  41. J. Sauder, N. Chahat, M. Thomson, R. Hodges, E. Peral, Y. Rahmat-Samii, “Ultra-Compact Ka-Band Parabolic Deployable Antenna for RADAR and Interplanetary CubeSats,” Proceedings of the AIAA/USU Conference on Small Satellites, 2015.
  42. N. Chahat, J. Sauder, R. Hodges, M. Thomson, and Y. Rahmat-Samii, “CubeSat deployable Ka-band reflector antenna for deep space missions,” APS/URSI 2015, Vancouver, Canada, July 2015.
  43. G. Chattopadhyay, T. Reck, N. Chahat, C. Lee, C. Jung-Kubiak, B. Karasik, M. Alonso-delPino, and N. Llombart, “Terahertz Antennas and Optical Elements,” APS/URSI 2015, Vancouver, Canada, July 2015.
  44. R. Hodges, D. Hoppe, M. Radway, and N. Chahat, “Novel deployable reflectarray antennas for CubeSat communications”, IEEE MTT-S International Microwave Symposium (IMS), Phoenix, Az, May 2015.
  45. N. Chahat and Richard Hodges, “Enabling deep space CubeSat missions: Telecommunication challenge”, MARS CubeSat/NanoSat Workshop, Pasadena, CA, Nov 2014.
  46. A. Tang, G. Chattopadhyay, Z. Chen, T. Reck, H. Schone, Y. Zhao, L. Du, D. Murphy, N. Chahat, E. Decrossas, I. Mehdi, and MF. Chang, “Applications of CMOS mm-wave & THz technology for exploration of deep space and the outer planetary systems,” IEEE Custom Integrated Circuits Conference, San Jose, CA, Sept. 2014.
  47. A. Tang and N. Chahat, “CMOS mm-Wave Transceiver Techniques beyond 50 GHz,” IEEE Global Conference on Signal and Information Processing, Dec. 2013, Austin, Texas, U.S.A.
  48. N. Chahat, G. Valerio, C. Leduc, M. Zhadobov, and R. Sauleau, “Skin-equivalent phantoms, propagation, and antennas for body-centric communications in the 60-GHz band,” IET Seminar on Body-Centric communications in the 60-GHz band, London, England, July. 2013.
  49. A. Tang, N. Chahat, Y. Kim, L. Du, L. Kong, G. Virbila, Y. Kuan, C. Lee, G. Chattopadhyay, T. Reck, I. Mehdi, M. F. Chang “A 95 GHz centimeter scale precision confined pathway system-on-chip navigation processor for autonomous vehicles in 65nm CMOS,” IEEE International Microw. Symp., Phoenix, AZ, USA, May 2015.
  50. M. Zhadobov, A. Guraliuc, N. Chahat, and R. Sauleau, “Tissue-equivalent phantoms in the 60-GHz band and their application to the body-centric propagation studies,” IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications (IMWS-Bio), Nov. 2014.
  51. A. Tang, N. Chahat, and E. Decrossas, “CMOS THz communication links for wireless applications: Where do they fit into mobile access and fixed access?,” International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Sept. 2014.
  52. N. Gautam, J. Kawamura, N. Chahat, B. Karasik, P. Focardi, S. Gulkis, L. Pfeiffer, and M. Sherwin, “Tunable antenna coupled intersubband terahertz detector,” International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz), Sept. 2014.
  53. A. R. Guraliuc, M. Zhadobov, G. Valerio, R. Sauleau, and N. Chahat, "On-body propagation at 60 GHz: Impact of a textile presence," IEEE Antennas and Propagation Society International Symposium (APSURSI), pp. 715-716, July 2014.
  54. A. Tang, N. Chahat, Y. Zhao, G. Virbila, C. Lee, F. Hsiao, L. Du, R. Shin, Y.-C. Kuan, M.-C. Frank Chang, G. Chattopadhyay, I. Mehdi, “A 65nm CMOS 140 GHz 27.3 dBm EIRP transmit array with membrane antenna for highly scalable multi-chip phase arrays,” MTT-S International Microwave Symposium (IMS), Tampa Bay, Florida, Jun. 2014.
  55. A. Tang, N. Chahat, E. Decrossas, G. Chattopadhyay, and I. Mehdi, “A 94 GHz multi-casting data-link based on 3D-printing compatible dielectric ribbon interconnects,” MTT-S International Microwave Symposium (IMS), Tampa Bay, Florida, Jun. 2014.
  56. A. R. Guraliuc, M. Zhadobov, G. Valerio, R. Sauleau, and N. Chahat, "On-body propagation at 60 GHz: Impact of a textile presence," IEEE Antennas and Propagation Society International Symposium (APSURSI), pp. 715-716, July 2014.
  57. G. Chattopadyay, T. Reck, C. Jung-Kubiak, Choonsup Lee, J. Siles, N. Chahat, K. Cooper, E. Schlecht, M. Alonso-delPino, amd I. Mehdi, “Terahertz antennas with silicon micromachined front-end,” European Conference on Antennas and Propagation (EuCAP), Netherlands, April 2014.
  58. A. R. Guraliuc, M. Zhadobov, G. Valerio, N. Chahat, and R. Sauleau, "Characterization of the body-centric propagation channel at 60 GHz in the presence of textiles," European Conference on Antennas and Propagation (EuCAP), pp. 3575-3577, April 2014.
  59. M. Zhadobov, N. Chahat, S. I. Alekseev, C. Leduc, A. Guraliuc, and R. Sauleau, “Evaluation of antenna / human body interactions in BAN scenarios at millimeter waves,” Progress in Electromagnetics Research Symposium (PIERS), Stockholm, Sweden, Aug. 2013.
  60. G. Valerio, N. Chahat, M. Zhadobov, and R. Sauleau, "Study of propagation along the body at 60 GHz with analytical models and skin-equivalent phantoms," IEEE Antennas and Propagation Society International Symposium (APSURSI) 2013, pp. 2097–2098, July 2013.
  61. G. Valerio, R. Sauleau, N. Chahat, A. Guraliuc, and M. Zhadobov, "Characterization of on-body communications at millimeter waves," International Conference on Electromagnetics in Advanced Applications (ICEAA), pp. 42–44, 9-13 Sept. 2013.
  62.  M. Zhadobov, N. Chahat, R. Sauleau, S. Alekseev, “New method for determining dielectric properties of high water content materials at millimeter waves based on heating kinetics,” Bioelectromagnetics Meeting, Thessaloniki, Greece, Jun. 2013.
  63. N. Chahat, M. Zhadobov, R. Sauleau, “Yagi-Uda textile antenna for on-body communications at 60 GHz,” European Conference on Antennas and Propagation (EuCAP), Suède, Avril 2013.
  64. N. Chahat, M. Zhadobov, R. Sauleau, “Wearable textile patch antenna for BAN at 60 GHz,” European Conference on Antennas and Propagation (EuCAP), Suède, Avril 2013.
  65. N. Chahat, M. Zhadobov, R. Sauleau, “Antennas and interaction with the body for body-centric wireless communications at millimeter-waves,” European Conference on Antennas and Propagation (EuCAP), Suède, Avril 2013.
  66. G. Valerio, N. Chahat, M. Zhadobov, R. Sauleau, “Theoretical and experimental characterization of on-body propagation at 60 GHz,” European Conference on Antennas and Propagation (EuCAP), Suède, Avril 2013.
  67. M. Zhadobov, N. Chahat, S. Alekseev, R. Sauleau., “Millimeter-wave Dosimetry for bioEM and BAN Applications,” Progress in Electromagnetics Research Symposium (PIERS 2012), Moscow, Russia, p. 265, Aug. 2012.
  68. N. Chahat, M. Zhadobov, and R. Sauleau, “Skin-equivalent phantom for on-body antenna measurements at 60 GHz,” European Conference on Antennas and Propagation (EuCAP), Prague, Czech Republic, Mar. 2012.
  69. N. Chahat, M. Zhadobov, R. Sauleau, K. Ito, “Dual-band wearable textile antenna with reduced backward radiation,” IET seminar on body-centric wireless communications, London, England, Jun. 27, 2011.
  70. N. Chahat, M. Zhadobov, R. Sauleau, K. Ito. “Antenna and propagation study for body-centric wireless communications at millimeter waves,” IET seminar on body-centric wireless communications, London, England, Jun. 27, 2011.
  71. M. Zhadobov, N. Chahat, Y. Le Dréan, C. Le Quément, and R. Sauleau, “Interactions of 60 GHz radiations with the human body,” 33rd Bioelectromagnetics Meeting, Halifax, Canada, June 2011.
  72. N. Chahat, M. Zhadobov, and R. Sauleau, “SAR reduction technique for future on-body communications: application to a dual-band textile antenna,” 33rd Bioelectromagnetics Meeting, Halifax, Canada, June 2011.
  73. N. Chahat, M. Zhadobov, and R. Sauleau, “On-body characterization of a wearable millimeter-wave antenna for body-centric applications,” 33rd Bioelectromagnetics Meeting, Halifax, Canada, June 2011.
  74. N. Chahat, M. Zhadobov, R. Augustine, and R. Sauleau, “From human skin permittivity measurements up to 65 GHz to development of skin-equivalent phantoms for body-centric applications,” 33rd Bioelectromagnetics Meeting, Halifax, Canada, June 2011.
  75. N. Chahat, M. Zhadobov, R. Sauleau, and K. Mahdjoubi, “Parametric Analysis of On-Body Dual-Band Antenna Performances: Dependence on the Human Body Morphology,” European Conference on Antennas and Propagation (EuCAP), pp. 437–440, Roma, Italy, 2011.
  76. N. Chahat, M. Zhadobov, R. Sauleau, and K. Ito, “A compact planar UWB antenna for on-body communications,” European Conference on Antennas and Propagation (EuCAP), 2011 Roma, Italy, pp. 1306–1309, Apr. 2011.
  77. N. Chahat, M. Zhadobov, R. Sauleau, and K. Mahdjoubi, “Improvement of the on-body performance of a dual-band textile antenna using an EBG structure,” Antennas and Propagation Conference (LAPC), 2010 Loughborough, UK, pp. 465–468, Nov. 2010.
  78. N. Chahat, M. Zhadobov, R. Sauleau, and K. Ito, “Design and characterization of an UWB wearable antenna,” Antennas and Propagation Conference (LAPC), 2010 Loughborough, UK, pp. 461–464, Nov. 2010.
  79. N. Chahat, M. Zhadobov, R. Sauleau, and K. Mahdjoubi, “Amélioration des Performances d’une Antenne Textile Double-Bande Positionnée sur le Corps,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
  80. N. Chahat, M. Zhadobov, and R. Sauleau. “Conception et Caractérisation d’une Antenne Ultra Large Bande pour les Communications sur le Corps,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
  81. N. Chahat, M. Zhadobov, R. Augustine, and R. Sauleau, “Développement d’un modèle humain dans la bande millimétrique pour les applications BANs,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
  82. C. Leduc, M. Zhadobov, N. Chahat, and R. Sauleau, “Impact de la méthode d'alimentation d'antennes planaires sur les interactions avec le corps humain à 60 GHz,” Dix-neuvièmes Journées Nationales Micro-ondes, Jun 2015, Bordeaux, France.
  83. N. Chahat, M. Zhadobov, R. Sauleau, and K. Mahdjoubi, “Amélioration des Performances d’une Antenne Textile Double-Bande Positionnée sur le Corps,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
  84. N. Chahat, M. Zhadobov, and R. Sauleau. “Conception et Caractérisation d’une Antenne Ultra Large Bande pour les Communications sur le Corps,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
  85. N. Chahat, M. Zhadobov, R. Augustine, and R. Sauleau, “Développement d’un modèle humain dans la bande millimétrique pour les applications BANs,” 17èmes journées Nationales Microondes, Brest, France, May. 18-20, 2011.
Nacer Chahat
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