Dr. Benjamin Lacroix

Dr. Benjamin Lacroix

Dr. Benjamin Lacroix,
Post-Doc Alumnus

Background

Benjamin Lacroix received the Ph.D. degree in Electrical and Telecommunications Engineering from the University of Limoges, France, in 2008. As a Ph.D. student with the XLIM Research Institute, he developed fast miniature RF MEMS switched capacitors and high-speed reconfigurable low-loss DMTL (Distributed MEMS Transmission Lines) phase shifters. He joined the MiRCTech research group, the Georgia Institute of Technology, in December 2008, as a post-doctoral fellow.

His current research is focused on reconfigurable microwave filters using ferroelectric BST capacitors. He also works on RF MEMS tunable devices and reliability of RF MEMS.

Research Interests

  • Reconfigurable microwave filters based on ferroelectric/RF MEMS capacitors
  • RF MEMS tunable devices
  • Reliability of RF MEMS

Publications

  1. C. A. Donado Morcillo, C. E. Patterson, B. Lacroix, C. Coen, C. H. J. Poh, J. D. Cressler and J. Papapolymerou, “An ultra-thin, high-power and multilayer organic antenna array with T/R functionality in the X band”, accepted for publication IEEE Trans. on Microwave Theory and Techniques.
  2. J. Hu, B. Lacroix, K. Choi, Y. Wang, A. T. Hunt and J. Papapolymerou, “A compact ferroelectric tunable bandpass filter with flexible frequency responses”, IEEE Int. Conf. on Wireless Information Technology and Systems, Nov. 2012.
  3. C. A. Donado Morcillo, B. Lacroix, H. Gu, J. Miller and J. Papapolymerou, “Compact and low-cost topology for evanescent-mode waveguide filters with dielectric loading in the X band”, EuMC 2012, 42nd European Microwave Conference, Oct.-Nov. 2012.
  4. Y. Orlic, B. Lacroix, N. Tiercelin, V. Preobrazhensky, P. Pernod, P. Coquet and J. Papapolymerou, “Frequency agile mechanical antenna for low-cost millimeter-wave applications”, IEEE Int. Symp. on Antennas and Propagation, July 2012.
  5. C. Kameni Ngassa, B. Lacroix and J. Papapolymerou, “Design of a low loss wideband millimeter-wave balun on a multilayer liquid crystal polymer technology”, Radio Wireless Symposium, Santa Clara, CA, Jan. 2012.
  6. J. Hu, B. Lacroix, K. Choi, Y. Wang, A. T. Hunt and J. Papapolymerou, “Ka- and U-band Tunable Bandpass Filters using Ferroelectric Capacitors”, IEEE Trans. on Microwave Theory and Techniques, vol. 59, Issue 12 , pp. 3068-3075, Dec. 2011.
  7. J. Hu, B. Lacroix and J. Papapolymerou, “Compact Tunable UHF Bandstop Resonator Filter Using Varactor-Loaded CPW Bottom-side Meander Line”, EuMC 2011, 41st European Microwave Conference, Oct. 2011.
  8. C. A. Donado Morcillo, C. Patterson, B. Lacroix, T. Thrivikraman, C. Coen, J. Poh, J. D Cressler and J. Papapolymerou, “A lightweight, 64-element, Organic Phased Array with Integrated Transmit-Receive SiGe Circuitry in the X Band”, International Microwave Symposium, Baltimore, June 2011.
  9. B. Lacroix and J. Papapolymerou, “A Triple-mode X-band Microstrip Ring Resonator Filter”, International Microwave Symposium, Baltimore, June 2011.
  10. K. Han, B. Lacroix, M. Swaminathan and J. Papapolymerou, “New Microstrip-to-CPS transition for millimeter wave application”, 61st Electronic Components and Technology Conference, Lake Buena Vista, Florida, June 2011.
  11. J. Hu, B. Lacroix, N. Tavassolian and J. Papapolymerou, “A Compact Tunable Filter using BST Thin film Varactors”, URSI National Radio Science Meeting, Boulder, CO, Jan. 2011.
  12. B. Lacroix, S. Courrèges, K. Choi, Y. Wang, A. T. Hunt and J. Papapolymerou, “A Low-Loss and Compact Size Analog Tunable Filter on Flexible Organic Substrate”, Asia-Pacific Microwave Conference, Yokohama, Japan, Dec. 2010.
  13. N. Tavassolian, M. Koutsoureli, G. Papaioannou, B. Lacroix, J. Papapolymerou, “Dielectric Charging in Capacitive RF MEMS Switches The Effect of Electric Stress”, Asia-Pacific Microwave Conference, Yokohama, Japan, Dec. 2010.
  14. S. Courrèges, B. Lacroix, A. Amadjikpè, S. Phillips, Z. Zhao, K. Choi, A. Hunt and J. Papapolymerou, “Back-to-back Tunable Ferroelectric Resonator Filters on Flexible Organic Substrates”, IEEE Trans. On Ultrasonics, Ferroelectrics, and Frequency Control, vol. 57, Issue 6, pp. 1267-1275, June 2010.
  15. B. Lacroix, K. Choi, A. T. Hunt and J. Papapolymerou, “Via-less X-band Stacked Filters on Duroid Substrate”, 60th Electronic Components and Technology Conference, Las Vegas, June 2010.
  16. S. Hwang, S. Min, M. Swaminathan, V. Venkatakrishnan, H. Chan, F. Liu, V. Sundaram, S. Kennedy, D. Baars, B. Lacroix, Y. Li and J. Papapolymerou, “Characterization of Next Generation Thin Low-K and Low-Loss Organic Dielectrics From 1 to 110 GHz”, IEEE Trans. On Advanced Packaging, vol. 3, Issue 1, pp. 180-188, Feb. 2010.
  17. N. Tavassolian, M. Koutsoureli, E. Papandreou, G. Papaioannou, B. Lacroix, Z. Liu, and J. Papapolymerou, “The Effect of Silicon Nitride Stoichiometry on Charging Mechanisms in RF-MEMS Capacitive Switches”, IEEE Trans. On Microwave Theory and Techniques, vol. 57, Issue 12 , Part 2, pp. 3518-3524, Dec. 2009.
  18. B. Lacroix, A. Pothier, A. Crunteanu and P. Blondy, “ Apport de capacités commutées MEMS RF miniatures pour la réalisation de fonctions de déphasage à faibles pertes et forte linéarité”, JNM 2009, XVIèmes Journées Nationales Microondes, May 2009.
  19. B. Lacroix, A. Pothier, A. Crunteanu and P. Blondy, “Phase Shifter Design Based on Fast RF MEMS Switched Capacitors”, EuMC 2008, 38th European Microwave Conference, pp. 1505-1508, Oct. 2008.
  20. B. Lacroix, A. Pothier, A. Crunteanu and P. Blondy, “Low-Loss DMTL Phase Shifter Based on Miniature RF MEMS Switched Capacitors”, MEMSWAVE 2008, 9th International Symposium on RF MEMS and RF Microsystems, Greece, July 2008.
  21. B. Lacroix, A. Pothier, A. Crunteanu, C. Cibert, F. Dumas-Bouchiat, C. Champeaux, A. Catherinot and P. Blondy, “Sub-Microsecond RF MEMS Switched Capacitors”, IEEE Trans. On Microwave Theory and Techniques, vol. 55, Issue 6 , Part 2, pp. 1314-1321, June 2007.
  22. B. Lacroix, A. Pothier, A. Crunteanu and P. Blondy, “Nouveau concept de capacités commutées MEMS RF ultra-rapides”, JNM 2007, XVèmes Journées Nationales Microondes, May 2007.
  23. B. Lacroix, A. Pothier, A. Crunteanu, C. Cibert, F. Dumas-Bouchiat, C. Champeaux, A. Catherinot and P. Blondy, “CMOS Compatible Fast Switching RF MEMS Varactors”, EuMC 2006, 36th European Microwave Conference, pp. 1072-1075, Sept. 2006.

Contact Information

Email: blacroix3@mail.gatech.edu

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