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Publications

Journal Papers

  1. Ghalichechian and K. Sertel, “Permittivity and Loss Characterization of SU-8 Films for mmW and Terahertz Applications,” IEEE Antennas and Propagation Letters, vol.14, pp.723, 726, 2015, http://dx.doi.org/10.1109/LAWP.2014.2380813 [pdf]
  2. V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis, “Equivalent Circuit for VO2 Phase Change Material Film in Reconfigurable Frequency Selective Surfaces,” Applied Physics Letters, vol. 107, p.253106, 2015, http://dx.doi.org/10.1063/1.4938468 [pdf]
  3. V. Sanphuang; N. Ghalichechian; N. K. Nahar; J. L. Volakis, "Reconfigurable THz Filters Using Phase-Change Material and Integrated Heater," in IEEE Transactions on Terahertz Science and Technology , vol.PP, no.99, pp.1-9
    doi: 10.1109/TTHZ.2016.2560175.
  4. E. Yetisir, N. Ghalichechian, J. Volakis, “Ultra-wideband Array with 70° Scanning using FSS Superstrate”, IEEE Transaction on Antennas and Propagation, accepted 11/25/2015.
  5. E. Yetisir, N. Ghalichechian, J. Volakis, “UWB Dual Polorized Tightly Coupled Dipole Array with 60° Scanning”, IEEE Antennas Wireless Propagation Letters, , April 2016 (under review).
  6. I. Beyaz, M. McCarthy, N. Ghalichechian, and R. Ghodssi, “Closed-loop control of a long-range micropositioner using integrated photodiode sensors,” Sensors and Actuators A, vol. 151, pp. 187-194, February 2009, http://dx.doi.org/10.1016/j.sna.2009.02.020 [pdf]
  7. Ghalichechian, A. Modafe, M.I. Beyaz, and R. Ghodssi, “Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings,” IEEE Journal of Microelectromechanical Systems, vol. 17, no 3, pp. 632- 642, June 2008, http://dx.doi.org/10.1109/jmems.2008.916346  [pdf]
  8. Ghalichechian, A. Modafe, J. H. Lang, and R. Ghodssi, “Dynamic Characterization of a Linear Electrostatic Micromotor Supported on Microball Bearings,” Sensors and Actuators A, vol. 136 (2), pp. 416-503, May 2007, http://dx.doi.org/10.1016/j.sna.2006.08.019 [pdf]
  9. Modafe, Ghalichechian, A. Frey, J. H. Lang, and R. Ghodssi, “Microball-Bearing-Supported Electrostatic Micromachines with Polymer Dielectric Films for Electromechanical Power Conversion,” Journal of Micromechanics and Microengineering, vol. 16, pp. S182-S190, September 2006,http://dx.doi.org/10.1088/0960-1317/16/9/s03 [pdf]
  10. Modafe, Ghalichechian, M. Powers, M. Khbeis, and R. Ghodssi, “Embedded Benzocyclobutene in Silicon (EBiS): An Integrated Fabrication Process for Electrical and Thermal Isolation in MEMS,” Microelectronic Engineering, vol. 82, pp. 154, August 2005,http://dx.doi.org/10.1016/j.mee.2005.07.005 [pdf]
  11. Ghalichechian, A. Modafe, R. Ghodssi, P. Lazzeri, R. Micheli, and M. Anderle, “Integration of Benzocyclobutene Polymers and Silicon Micromachined Structures Using Anisotropic Wet Etching,” Journal of Vacuum Science and Technology (JVST) B, vol. 22, pp. 2439-2447, September 2004, http://dx.doi.org/10.1116/1.1787519 [pdf]
  12. Modafe, Ghalichechian, B. Kleber and R. Ghodssi, “Electrical Characterization of Benzocyclobutene Polymers for Electric Micromachines,”IEEE Transactions on Device and Materials Reliability, vol.4, pp. 495-508, September 2004, http://dx.doi.org/10.1109/tdmr.2004.830289 [pdf]

Conference Papers

  1. B. Ghassemiparvin and N. Ghalichechian, “Reconfigurable Millimeter-wave Antennas using Paraffin-Based MEMS Capacitors,” European Conference on Antennas and Propagation (EuCAP), Davos, Switzerland, April 10-15, 2016.
  2. K. Keshtkaran and N. Ghalichechian, “Suspended 60 GHz Phased Array Antenna With High Efficiency,” International Workshop on Antenna Technology (iWAT), Hilton Cocoa Beach, FL, Feb 29- Mar 2, 2016.
  3. B. Ghassemiparvin and N. Ghalichechian, “Permittivity and Dielectric Loss Measurement of Paraffin for mW and THz Applications,” International Workshop on Antenna Technology (iWAT), Hilton Cocoa Beach, FL, Feb 29- Mar 2, 2016.
  4. D. K. Papantonis, N. Ghalichechian and J. L. Volakis, “Tunable Band Rejection In A Tightly-Coupled Array Using Varactor Diodes,” International Workshop on Antenna Technology (iWAT), Hilton Cocoa Beach, FL, Feb 29-Mar 2, 2016.
  5. V. Sanphuang, N. Ghalichechian, N. Nahar, J. L. Volakis, “Reconfigurable THz Array Employing Vanadium Dioxide,” URSI National Radio Science Meeting, Boulder, Colorado, January 6-9, 2016.
  6. E. Yetisir, N. Ghalichechian and J. L. Volakis, “A Novel Array with 6:1 Bandwidth and 70° Scanning Using FSS Superstrate,” URSI National Radio Science Meeting, Boulder, Colorado, January 6-9, 2016.
  7. E. Yetisir, N. Ghalichechian, J. Volakis, “Wideband & Wide Angle Scanning Array with Parasitic Superstrate”, IEEE Symposium on Antennas and Propagation  (APS), Vancouver, Canada, 17-22 July, 2015.
  8. E. Alwan, N. Ghalichechian, J. Volakis, “Low Power Millimeter Wave Beamforming Transceiver System using On-Site Coding”, URSI CNC/USNC Joint Meeting, Vancouver, Canada, 17-22 July, 2015.
  9. D. Papantonis, N. Ghalichechian, J. Volakis, “UWB Arrays With Tunable Band Rejection”, IEEE Symposium on Antennas and Propagation  (APS), Vancouver, Canada, 17-22 July, 2015.
  10. V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis, “Bandwidth Reconfigurable THz Filter Employing Phase-Change Material”, IEEE Symposium on Antennas and Propagation  (APS), Vancouver, Canada, 17-22 July, 2015.
  11. S. Sahin, N. Ghalichechian, N. Nahar, K. Sertel, “Lithographically-fabricated Ultrawideband Phased-Arrays for Agile mmW Connectivity”, URSI CNC/USNC Joint Meeting, Vancouver, Canada, 17-22 July, 2015.
  12. D. Papantonis, N. Ghalichechian, J. Volakis, “Reconfigurable Ultra-Wideband Array with Tunable Band Rejection across a 7:1 Bandwidth”, IEEE-MTT International Microwave Symposium (IMS), Phoenix, AZ, 17-22 May, 2015, http://dx.doi.org/10.1109/mwsym.2015.7166828
  13. L. Chau, J. G. Ho, X. Lan, G. Altvater, R. M. Young, N. El-Hinnawy, D. Nichols, J Volakis, N Ghalichechian., "Optically-controlled GeTe phase change switch and its applications in reconfigurable antenna arrays," Proceedings of SPIE- The International Society of Optical Engineering, Volume 9479, Baltimore, MD, April 20, 2015, http://dx.doi.org/10.1117/12.2179852 .
  14. Loc Chau, James G. Ho, Xing Lan, Norma Riley, Robert M. Young, Nabil El-Hinnawy, Doyle Nichols, John Volakis, and Nima Ghalichechian, “Reconfigurable Antenna Aperture with Optically Controlled GeTe-Based RF Switches”, 40th Annual Government Microcircuit Applications & Critical Technology Conference (GOMACTech), St. Louis, MO, March 23-26, 2015.
  15. D. Papantonis, M. Novak, N. Ghalichechian, John L. Volakis, “Conformal and Reconfigurable Ultra-wide-band Arrays”, 9th European Conference on Antennas and Propagation (EuCAP), Lisbon, Portugal, 12-17 April 2015.
  16. J. L. Volakis, E. A. Alwan, D. Papantonis, M. Novak, N. Ghalichechian and W. Khalil, “Low Power Ultra-Wideband Digital Beamforming for UHF to Millimeter-Wave Applications”, 11th International Workshop on Antenna Technology (iWAT), Seoul, Korea, March 4-6, 2015 (invited keynote).
  17. V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis, “Phase Change Materials for Reconfigurability in THz band,” in Proceedings of National Aerospace and Electronics Conference , Dayton, Ohio, June 25- 26, 2014.
  18. V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis, “Phase Change Materials for Reconfigurable Systems,” 2104 IEEE AP-S/URSI-USNC Symposium, Memphis, Tennessee, July 6- 12, 2014, http://dx.doi.org/10.1109/USNC-URSI.2014.6955591
  19. S. Sahin, N. Ghalichechian, K. Sertel, “Ultra-wideband, High-efficiency, On-chip mmW Phased Arrays with Wafer-level Vertical Integration,” IEEE AP-S/URSI-USNC Symposium, Memphis, Tennessee, July 6- 12, 2014, http://dx.doi.org/10.1109/USNC-URSI.2014.6955485
  20. V. Sanphuang, N. Ghalichechian, N. Nahar, J. Volakis, “Reconfigurable THz Filters with Integrated Micro-Heater,” IEEE AP-S/URSI-USNC Symposium, Memphis, Tennessee, July 6- 12, 2014, http://dx.doi.org/10.1109/APS.2014.6904613
  21. N. Ghalichechian, J. Doane, W. Hong, K. Sertel, and J. Volakis,  “Characterization of SU-8 Using Terahertz Time-Domain Spectroscopy”, IEEE AP-S/URSI-USNC Symposium, Orlando, Florida. July 7- 13, 2013, http://dx.doi.org/10.1109/usnc-ursi.2013.6715324
  22. M.I. Beyaz, M. McCarthy, N. Ghalichechian, and R. Ghodssi, "Photodiode Position Sensors for Integrated Feedback Control of a Long-Range Micropositioner", Proceedings of the 2008 IEEE Sensors Conference, Lecce, Italy, October 26-29, 2008, http://dx.doi.org/10.1109/icsens.2008.4716563
  23. N. Ghalichechian, M. McCarthy, M. I. Beyaz, and R. Ghodssi, "Measurement and Modeling of Friction in Linear and Rotary Micromotors Supported on Microball Bearings,” proceedings of the 21th IEEE International Conference on Micro Electro Mechanical Systems," Tuscan, Arizona, Jan 13-17, 2008, http://dx.doi.org/10.1109/memsys.2008.4443704
  24. M. I. Beyaz, N. Ghalichechian, and R. Ghodssi, "Towards an Autonomous Electrostatic Micromotor: Integrated Feedback Control,” proceedings of the 21th IEEE International Conference on Micro Electro Mechanical Systems," Tuscan, Arizona, Jan 13-17, 2008, http://dx.doi.org/10.1109/memsys.2008.4443698
  25. M. I. Beyaz, N. Ghalichechian, and R. Ghodssi, "Toward Smart Micromachines with Integrated Feedback Control," International Semiconductor Device Research Symposium (ISRS 2007), College Park, MD, December 11 - 14, 2007, http://dx.doi.org/10.1109/isdrs.2007.4422471
  26. M. I. Beyaz, N. Ghalichechian, A. Modafe, and R. Ghodssi, "Towards Feedback Control with Integrated Position Sensing in Micromachines," AVS 54th International Symposium, Seattle, WA, October 14-19, 2007.
  27. N. Ghalichechian, A. Modafe, M. I. Beyaz, and R. Ghodssi, "A Rotary Micromotor Supported on Microball Bearings," The 14th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers '07), pp. 1123-1126, Lyon, France, June 10-14, 2007, http://dx.doi.org/10.1109/sensor.2007.4300332
  28. N. Ghalichechian, A. Modafe, M. I. Beyaz, C. M. Waits, and R. Ghodssi, “Design and Fabrication of a Rotary, Electrostatic Micromotor Supported on Microball Bearings,” Sixth International Workshop on Micro and Nanotechnology for Power Generation and Energy Conversion Applications (Power MEMS ’06), pp. 227-230, Berkeley, CA, USA, Nov 29-Dec 1, 2006.
  29. N. Ghalichechian, A. Modafe, M. I. Beyaz, and R. Ghodssi, “Chemical Mechanical Planarization of BCB Polymer Films: Effect of Cure Temperature”, AVS 53rd International Symposium, San Francisco, CA, November 12-17, 2006.
  30. N. Ghalichechian, A. Modafe, A. Frey, J. H. Lang, and R. Ghodssi, “Dynamic Characterization of a Linear Variable-Capacitance Micromotor”, 2006 Solid-State Sensor, Actuator, and Microsystems Workshop, pp. 19-22, Hilton Head Island, SC, June 4-8, 2006.
  31. A. Modafe, N. Ghalichechian, A. Frey, J. H. Lang, and R. Ghodssi, "Microball-Bearing-Supported Electrostatic Micromachines with Polymer Dielectric Films for Electromechanical Power Conversion," Fifth International Workshop on Micro Nano Technology for Power Generation and Energy Conversion Applications (Power MEMS ‘05), pp.173-6, Tokyo, Japan, November 28-30, 2005.
  32. A. Modafe, N. Ghalichechian, and R. Ghodssi, “Multilevel Interconnection and Isolation for Electrostatic MEMS Using Embedded Benzocyclobutene in Silicon Process”, Twenty Second International VLSI Multilevel Interconnection (VMIC) Conference, Fremont, CA, October 4-6, 2005 (invited paper).
  33. A. Modafe, N. Ghalichechian, J. H. Lang, and R. Ghodssi, "A Microball-Bearing-Supported Linear Electrostatic Micromotor with Benzocyclobutene Polymer Insulating Layers," The 13th International Conference on Solid-State Sensors, Actuators, and Microsystems (Transducers '05), pp. 693-6, Seoul, Korea, June 5-9, 2005, http://dx.doi.org/10.1109/sensor.2005.1496511
  34. Nima Ghalichechian, Alireza Modafe, Paolo Lazzeri, Victor Micheli, Mariano Anderle, and Reza Ghodssi, "Characterization of Benzocyclobutene and Chromium-gold Film Interface for Application in Silicon Micromachining," Material Research Society 2005 Spring Meeting, San Francisco, CA, March 28-April 1, 2005.
  35. A. Modafe, N. Ghalichechian, and R. Ghodssi, "Embedded Benzocyclobutene Islands in Silicon (EBIS) Process for Fabrication of Electrostatic Microelectromechanical Devices," Materials Research Society 2005 Spring Meeting, San Francisco, CA, March 28-April 1, 2005.
  36. A. Modafe, N. Ghalichechian, and R. Ghodssi, “BCB-Based  Linear  Micromotor  Supported  on Microball  Bearings:  Design  Concepts,  Characterization,  and  Fabrication  Development”, American  Vacuum   Society   51st  International  Symposium,  Anaheim,  CA,  November 14-19, 2004.
  37. X. Tan, A. Modafe, R. Hergert, N. Ghalichechian, B. Shapiro, and R. Ghodssi, “Vision-based Microtribological  Characterization of Linear Microball Bearings,” in Proceedings of 2004 ASME/STLE International Joint Tribology Conference, Long Beach, CA,  Oct 24-27, 2004, http://dx.doi.org/10.1115/trib2004-64334
  38. A. Modafe, N. Ghalichechian, B. Kleber and R. Ghodssi, "Electrical Characterization of BCB for Electrostatic Microelectromechanical Devices," in Proceedings of Materials Research Society 2003 Fall Meeting, Boston, MA, December 1-5, 2003, http://dx.doi.org/10.1557/proc-782-a5.69
  39. N. Ghalichechian, A. Modafe and R. Ghodssi, "Integration of Silicon Anisotropic Wet Etching and BCB Processes," presented at the AVS 50rd International Symposium, Baltimore, MD, November 2-7, 2003.

Seminars

  1. Reconfigurable Electromagnetic Interface, Oral presentation, DARPA ACT Annual PI Review Meeting, San Diego, CA, August 5, 2015.
  2. Reconfigurable RF Microsystems Research Overview, Oral presentation, Consortium on Electromagnetics and Radio Frequencies 5th Technical Meeting, Columbus, OH, August 5, 2014.
  3. Towards Reconfigurable and Low-loss Millimeter-Wave Antennas using MEMS Paraffin Micro-actuators, poster presented at the Consortium on Electromagnetics and Radio Frequencies 5th Technical Meeting, Columbus, OH, August 5, 2014.
  4. Fabrication of K and Ku-band Corrugated Conical Horn Antennas using 3D Printers, , poster presented at the Consortium on Electromagnetics and Radio Frequencies 5th Technical Meeting, Columbus, OH, August 5, 2014.
  5. Phase-Change Materials for Reconfigurability in THz Applications, , poster presented at the Consortium on Electromagnetics and Radio Frequencies 5th Technical Meeting, Columbus, OH, August 5, 2014.
  6. Conformal and Reconfigurable Beam-Forming Arrays with 10:1 Bandwith, , poster presented at the Consortium on Electromagnetics and Radio Frequencies 5th Technical Meeting, Columbus, OH, August 5, 2014.
  7. Phase-Change Materials for Reconfigurable Terahertz Microsystems, OSU Materials Week Poster Session, Columbus, OH, May 6-9, 2014.
  8. Reconfigurable Balun Feeds for Wide-Band Antenna Arrays, DARPA ATC II Kick-off Meeting, Charleston, SC, April 2-3, 2014.
  9. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, Electroscience Laboratory, The Ohio State University, Aug 2, 2012.
  10. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, Solid State Electronics and Photonics Seminar, The Ohio State University, June 10, 2010.
  11. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, IEEE AP-MTT Chapter, Invited presentation, The Ohio State University, June 10, 2010.
  12. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, Invited presentation , MEMS and NEMS Seminar Series, Stanford University, CA, Feb 2  2010.
  13. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, Invited presentation, Massachusetts Institute of Technology, MA, May 15, 2007.
  14. Design, Fabrication, and Characterization of a Rotary Micromotor Supported on Microball Bearings, Nanoday, Open Poster Session, University of Maryland, MD, May 11, 2007.
  15. A New Generation of Rotary Micromotors, Seminar series of Electrical and Computer Engineering Graduate Student Association (ECEGSA), University of Maryland, December 8, 2006.
  16. Microball-bearing-supported Electric Machine, Army Research Office (MURI) Annual Review, University of Maryland, November 1, 2006.
  17. Electrostatic Micromotors Supported on Microball Bearings, MEMS Alliance Special Topic Symposium, Open Poster Session, Applied Physics Lab, Johns Hopkins University, MD, April 4, 2006.
  18. Electrostatic Micromotors Supported on Microball Bearings, Nanoday, Open Poster Session, University of Maryland, MD, May 12, 2006.
  19. A Rotary, variable-capacitance Micromotor Supported on Microball Bearings, Small Smart Systems Center, University of Maryland, College Park, November 11, 2005.
  20. BCB-Based MEMS Technology: Electrical Characterization and Integration with Silicon Micromachining, 2004 Solid-State Sensor, Actuator, and Microsystems Workshop, Open Poster Session, Hilton Head Island, SC, June 6-10, 2004.
  21. Integration of BCB Polymers and Silicon Micromachines Structures Using Anisotropic Wet Etching, Small Smart Systems Center, University of Maryland, College Park, April 16, 2004.
  22. BCB-based MEMS Technology,” MEMS Alliance Special Topic Symposium, Open Poster Session, Applied Physics Lab, Johns Hopkins University, MD, March 29-30, 2004