Ahmed Kord, PhD

Postdoctoral Research Scientist, Columbia University

Check out my Google Scholar profile here.

Patents

  1. A. Kord, A. Alù, and D. L. Sounas, "Magnetless Non-Reciprocal Devices Using Modulated Filters," patent application filed. (IP is licensed to the startup company Silicon Audio/RF Circulator LLC, Austin, TX, USA)
  2. M. Rinaldi, C. Cassella, A. Alù, D. L. Sounas, and A. Kord, "Microelectromechanical Resonant Circulator (MIRC)," patent application filed.

Journals

  1. Y. Yu, G. Michetti, M. Pirro, A. Kord, D. L. Sounas, Z. Xiao, C. Cassella, A. Alù, and M. Rinaldi, "Radio Frequency Magnet-free Circulators Based on Spatiotemporal Modulation of Surface Acoustic Wave Filters," IEEE Trans. Microw. Theory Techn., vol. 67, no. 2, pp. 4773-4782, 2019.
  2. Y. Yu, G. Michetti, A. Kord, M. Pirro, D. L. Sounas, Z. Xiao, C. Cassella, A. Alù, and M. Rinaldi, "Highly-Linear Magnet-Free Microelectromechanical Circulators," IEEE J. Microelectromech. Syst. (MEMS), vol. 28, no. 6, pp. 933-940, Dec. 2019.
  3. A. Kord, H. Krishnaswamy, and A. Alù, "Magnetless Circulators with Harmonic Rejection Based on N-Way Cyclic-Symmetric Time-Varying Networks," Phys. Rev. Appl., vol. 12, no. 2, pp. 024046 (1-14), Aug. 2019.
  4. C. Cassella, G. Michetti, M. Pirro, Y. Yu, A. Kord, D. Sounas, A. Alù, and M. Rinaldi, "Radio Frequency Angular Momentum Biased Quasi-LTI Nonreciprocal Acoustic Filters," IEEE Trans. Ultrason. Ferroelectr. Freq. Control (UFFC), vol. 66, no. 11, pp. 1814-1825, Nov. 2019.
  5. A. Kord, M. Tymchenko, D. L. Sounas, H. Krishnaswamy, and A. Alù, "CMOS Integrated Magnetless Circulators Based on Spatiotemporal Modulation Angular-Momentum Biasing," IEEE Trans. Microw. Theory Techn., vol. 67, no. 7, pp. 2649-2662, July 2019.
  6. A. Kord, D. L. Sounas, and A. Alù, "Active Microwave Cloaking Using Parity-Time-Symmetric Satellites," Phys. Rev. Appl., vol. 10, no. 5, pp. 0540401 (1-15), Nov. 2018.
  7. D. L. Sounas, N. A. Estep, A. Kord, and A. Alù, "Angular-Momentum Biased Circulators and Their Power Consumption," IEEE Antennas Wireless Propag. Lett., vol. 17, no. 11, pp. 1963-1967, Nov. 2018. (Invited)
  8. A. Kord, D. L. Sounas, Z. Xiao, and A. Alù, "Broadband Cyclic-Symmetric Magnetless Circulators and Theoretical Bounds on Their Bandwidth," IEEE Trans. Microw. Theory Techn., vol. 66, no. 12, pp. 5472-5481, Dec. 2018.
  9. A. Kord, D. L. Sounas, and A. Alù, "Achieving Full-Duplex Communication: Magnetless Parametric Circulators for Full‐Duplex Communication Systems," IEEE Microw. Mag., vol. 19, no. 1, pp. 84-90, Jan. 2018. (Invited)
  10. A. Kord, D. L. Sounas, and A. Alù, "Pseudo‐Linear Time‐Invariant Magnetless Circulators Based on Differential Spatiotemporal Modulation of Resonant Junctions," IEEE Trans. Microw. Theory Techn., vol. 66, no. 6, pp. 2731‐2745, June 2018.
  11. A. Kord, D. L. Sounas, and A. Alù, "Magnetless Circulators Based on Spatiotemporal Modulation of Bandstop Filters in a Delta Topology," IEEE Trans. Microw. Theory Techn., vol. 66, no. 2, pp. 911‐926, Feb. 2018.
  12. A. Kord and I. Eshrah, "Generalised Asymptotic Boundary Conditions and Their Application to Composite Right/Left-Handed Rectangular Waveguide with Double-Ridge Corrugations," IET Micow. Antennas Propag., vol. 8, no. 13, pp. 1014‐1020, Oct. 2014.

Conferences

  1. A. Kord, D. L. Sounas, and A. Alù, "Non-Reciprocity Based on Synthetic Momentum Bias," in Proc. IEEE Int. Symp. Antennas Propag. (APS/URSI), Atlanta, GA, July 7-12, 2019. (Invited)
  2. A. Kord and A. Alù, "Magnet-Free Circulators Based on Linear Time-Varying Circuits," USNC-URSI Nat. Radio Sci. Meeting (NRSM), Boulder, CO, USA, Jan. 9-12, 2019.
  3. G. Michetti, C. Cassella, F. Pop, A. Kord, D. Sounas, A. Alù, and M. Rinaldi, "A Quasi-LTI Frequency-Selective SAW Circulator," in Proc. IEEE Int. Ultrasonic Symp. (IUS), Kobe, Japan, October, 2018.
  4. G. Michetti, C. Cassella, F. Pop, A. Kord, D. Sounas, A. Alù, and M. Rinaldi, "A Quasi-LTI Frequency-Selective SAW Circulator," in Proc. IEEE Int. Ultrasonics Symp. (IUS), Kobe, Japan, 2018. (Nominated for Best Student Paper Award in the Physical Acoustic section)
  5. A. Kord, D. L. Sounas, and A. Alù, "Broadband Non-Reciprocity in Spatio-Temporally Modulated Metamaterials," SIAM Conf. Math. Asp. Mater. Sci., Portland, OR, July 2018. (Invited)
  6. A. Kord, D. L. Sounas, and A. Alù, "Low-Loss Broadband Magnetless Circulators for Full-Duplex Radios," in Proc. IEEE MTT-S Int. Mircow. Symp. (IMS), Philadelphia, PA, June 2018.
  7. Y. Yu, F. Pop, G. Michetti, P. Kulik, M. Pirro, A. Kord, D. Sounas, A. Alù, and M. Rinaldi, "2.5 GHz Highly-Linear Magnetic-Free Microelectromechanical Resonant Circulator," in Proc. IEEE Int. Freq. Cont. Symp. (IFCS), Olympic Valley, CA, May 2018.
  8. Y. Yu, G. Michetti, A. Kord, D. Sounas, F. Pop, P. Kulik, M. Pirro, Z. Qian, A. Alù, and M. Rinaldi, "Magnetic-Free Radio Frequency Circulator based on Spatiotemporal Commutation of MEMS Resonators," in Proc. IEEE 31st Int. Conf. Micro Electro-Mech. Syst. (MEMS), Belfast, UK, Jan. 2018. (Nominated for Best Student Paper Award)
  9. D. L. Sounas, A. Kord, and A. Alù, "Magnetless Nonreciprocal Devices Based on Angular Momentum Biasing," USNC-URSI Nat. Radio Sci. Meeting (NRSM), Boulder, CO, Jan. 2018. (Invited)
  10. A. Kord, D. L. Sounas, and A. Alù, "Recent Advances on Angular‐Momentum Magnet‐Free Circulators," in Proc. IEEE Int. Symp. Antennas Propag. (APS/URSI), San Diego, CA, July 2017.
  11. A. Kord, D. L. Sounas, and A. Alù, "Differential Magnet‐less Circulator Using Modulated Bandstop Filters," in Proc. IEEE MTT-S Int. Mircow. Symp. (IMS), Honolulu, HI, June 2017.
  12. A. Kord, D. L. Sounas, and A. Alù, "Electromagnetic Devices for Next-Generation Wireless Communication Systems," in Proc. IEEE Texas Symp. Wireless Microw. Circ. Syst. (WMCS), Baylor, TX, March 2017.
  13. A. Kord, D. L. Sounas, and A. Alù, "Ultrathin Active Cloak with Balanced Loss and Gain," in Proc. IEEE Int. Symp. Antennas Propag. (APS/URSI), Fajardo, PR, July 2016.

Dissertations

  1. A. Kord, Magnetless Circulators Based on Linear Time-Varying Circuits,” Ph.D. Dissertation, Univ. of Texas at Austin, June 2019.
  2. A. Kord, CRLH Waveguides with Double-Ridge Corrugations: Analysis and Applications," M.Sc. Thesis, Cairo Univ., Egypt, June 2014.
  3. A. Kord, A. H. Ibrahim, M. E. Mohamed, M. M. Naguib, M. H. Abbas, and M. Y. Abbas, “Low-Power Implantable Pressure Sensor for Biomedical Applications,” B.Sc. Thesis, Cairo Univ., Egypt, June 2011.