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Conference Papers

 

  1. Jack Eichenberger and Nima Ghalichechian, “Single Antenna Beam Scanning via Reconfigurable Vanadium Dioxide (VO2) Metasurface”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  2. Kendrick Henderson and Nima Ghalichechian, “Novel 1256-Element Circularly-Polarized Metal-Only Reflectarray Using Spiral Slots”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  3. Behnam Ghassemiparvin and Nima Ghalichechian, “Paraffin-Based RF Microsystems for Millimeter Wave Reconfigurable Antennas”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  4. Shangyi Chen, Mark Lust, and Nima Ghalichechian, “A Vanadium Dioxide Microbolometer in the Transition Region for Millimeter Wave Imaging”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  5. Mark Lust, Shangyi Chen, and Nima Ghalichechian, “MEMS-Suspended Bowtie Antenna Array for Microbolometer mmW Imaging Device”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  6. Kendrick Henderson and Nima Ghalichechian, “Steerable Spiral Slot Reflectarray at 66 GHz Using Micromachined Movable Silicon Slab”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  7. Kunchen Zhao, Grant Senger, and Nima Ghalichechian, “Fabrication and Characterization of 3D-Printed Ku-band Frequency Scanning Slotted Waveguide Antenna Array”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  8. Carmen Matos, Jiantong Li, and Nima Ghalichechian, “A Robotic Pattern Measurement System for 60 GHz Antenna Arrays”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  9. Jiantong Li and Nima Ghalichechian, “Suspended Highly-efficient On-chip Phased Array Antenna at 60 GHz”, IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, Atlanta, Georgia, 7-12 July, 2019.

  10. Jiantong Li and Nima Ghalichechian, “CPW-Fed Suspended 60 GHz On-chip Phased Array with High Efficiency”, Annual Government Microcircuit Applications & Critical Technology Conference (GOMACTech) , Albuquerque, NM, March 25-28, 2019.

  11. Kunchen Zhao, Grant Senger, and Nima Ghalichechian, "3D-Printed Frequency Scanning Slotted Waveguide Array with Wide Band Power divider" USNC-URSI National Radio Science Meeting (NRSM), Boulder, CO, Jan. 9-12, 2019.

  12. K. H. Jeong and N. Ghalichechian, “Design, Fabrication, and Measurement of a Millimeter Wave Fresnel Lens using Additive Manufacturing,” in IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting., Boston, MA, pp. 1879-1880, 2018.

  13. J. T. Li and N. Ghalichechian, "A High-gain Large-scanning 60 GHz Via-fed Patch Phased Array Antenna, " 2018 IEEE International Symposium on Antennas and Propagation (APSURSI), Boston, Massachusetts, 2018.

  14. S.Chen and N. Ghalichechian “The Design of High-Responsivity Millimeter Wave Imager Using Vanadium Dioxide Microbolometers”, at The 12h European Conference on Antennas and Propagation (EuCAP), London, UK, April 9-13, 2018.

  15. B. Ghassemiparvin and N. Ghalichechian “W-Band True-Time Delay Phase Shifters Using Paraffin Microactuators”, at The 12h European Conference on Antennas and Propagation (EuCAP), London, UK, April 9-13, 2018.

  16. A. Johnson-Eusebio, M. Klunk, N. Ghalichechian “3D-Printed Slotted Waveguide Arrays at Ku Band”, Annual Government Microcircuit Applications & Critical Technology Conference (GOMACTech) , Miami, FL, March 12-15, 2018.

  17. B. Ghassemiparvin, and Nima Ghalichechian, "Broadband Complex Permittivity Measurement of Paraffin Films at 26 GHz–1 THz Using Time Domain Spectroscopy" at 2017 IEEE International Symposium on Antennas and Propagation (APSURSI), San Diego, CA, 2017. https://doi.org/10.1109/APUSNCURSINRSM.2017.8072486

  18. B. Ghassemiparvin, S. Shah, and N. Ghalichechian, "Novel Paraffin-based 100-GHz Variable Capacitors for Reconfigurable Antennas," at The 11th European Conference on Antennas and Propagation (EuCAP), Paris, France, 2017. https://doi.org/10.23919/EuCAP.2017.7928379

  19. K. Keshtkaran and N. Ghalichechian, "60 GHz Capacitively Probe-Fed Patch Arrays with Suspended Elements," at The 11th European Conference on Antennas and Propagation (EuCAP), Paris, France, 2017. https://doi.org/10.23919/EuCAP.2017.7928510

  20. B. P. Lough, B. Ghassemiparvin, and N. Ghalichechian, “RF Micro-Electro-Mechanical Pulmonary Artery Banding for Congenital Heart Diseases”, IEEE 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Orlando, FL, USA, August 17-20, 2016.

  21. 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. http://dx.doi.org/10.1109/EuCAP.2016.7481595

  22. 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. http://dx.doi.org/10.1109/IWAT.2016.7434794

  23. 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. http://dx.doi.org/10.1109/IWAT.2016.7434797

  24. 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. https://doi.org/10.1109/IWAT.2016.7434789

  25. 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. 

  26. 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.

  27. 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. https://doi.org/10.1109/APS.2015.7305649

  28. 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.

  29. 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. https://doi.org/10.1109/APS.2015.7305527

  30. 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. https://doi.org/10.1109/APS.2015.7305533

  31. 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. https://doi.org/10.1109/USNC-URSI.2015.7303307

  32. 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

  33. 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 .

  34. 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.

  35. 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.

  36. 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).

  37. 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. https://doi.org/10.1109/NAECON.2014.7045827

  38. 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

  39. 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

  40. 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

  41. 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

  42. 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

  43. 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

  44. 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

  45. 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

  46. 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. 

  47. 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

  48. 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.

  49. 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.

  50. 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.

  51. 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.

  52. 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).

  53. 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

  54. 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.

  55. 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.

  56. 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.

  57. 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

  58. 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

  59. 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.