Publications

  1. Kathryn L. Smith and Ryan S. Adams, “Spherical Spiral Metamaterial Unit Cell for Negative Permeability and Negative Permittivity,” IEEE Transactions on Antennas and Propagation, Vol. 66, No. 11, 6425-6428, 2018.
  2. Kathryn L. Smith and Ryan S. Adams, “A Broadband 3D Printed Fractal Tree Monopole Antenna,” Progress in Electromagnetics Research C, Vol. 86, 17-28, 2018.
  3. Kathryn L. Smith and Ryan S. Adams, “A Broadband Negative Epsilon Fractal Metamaterial Unit Cell for Coaxial Notch Filter Applications,” Progress in Electromagnetics Research C., Vol. 86, 17-28, 2018.
  4. Kathryn L. Smith and Ryan S. Adams, “A Nested-Spring Metamaterial Unit Cell for Broadband Mechanically-Tunable Effective ε,” 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Boston, MA, July 8-13, 2018.
  5. Kathryn L. Smith and Ryan S. Adams, “A Circularly-Polarized Horn Antenna with Tunable Handedness Using Chiral Metamaterial Loading,” 2018 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Boston, MA, July 8-13, 2018.
  6. Kathryn L. Smith and Ryan S. Adams, “A Multiband Ringed Rectangular Patch Antenna,” 2017 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, San Diego, CA, July 9-14, 2017.
  7. Kathryn L. Smith, J. Luke Stuemke, Ryan S. Adams, and Thomas P. Weldon, “A Digital Non-Foster Fast-Wave Line Using an Internet of Things Approach for Software Tuning of Multiple Digital Negative Capacitors,” IEEE SoutheastCon 2017 Proceedings, Charlotte, NC, Mar. 31 – Apr. 2, 2017.
  8. Kathryn L. Smith and Ryan S. Adams, “A λ0/60 Spherical Spiral Metamaterial for Negative Permeability and Negative Permittivity,” 2016 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26- July 1, 2016.
  9. Kathryn L. Smith, Ryan S. Adams, and Thomas P. Weldon, “Measurement of a Fast-Wave Line Using Digital Non-Foster Circuits for Software-Adjustable Delay,” 2016 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Fajardo, Puerto Rico, June 26- July 1, 2016.
  10. Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams, “A Two-Port Digital Discrete-Time Non-Foster Circuit Designed for Negative Capacitance,” Ninth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics – Metamaterials 2015 , Oxford, United Kingdom, Sep. 7-10, 2015.
  11. Kathryn L. Smith, Thomas P. Weldon, and Ryan S. Adams, “Measurement, Simulation, and Theory of a Non-Foster Metamaterial Unit Cell with Parasitic Resistance,” 2015 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Vancouver, BC, Canada, July 19-25, 2015.
  12. Kathryn L. Smith and Ryan S. Adams, “A Novel Ultra-Wideband Fractal Monopole Antenna,” 2015 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Vancouver, BC, Canada, July 19-25, 2015.
  13. Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams, “Stability Conditions for a Digital Discrete-Time Non-Foster Circuit Element,” 2015 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Vancouver, BC, Canada, July 19-25, 2015.
  14. Thomas P. Weldon, John M. C. Covington III, Kathryn L. Smith, and Ryan S. Adams “Performance of Digital Discrete-Time Implementations of Non-Foster Circuit Elements,” 2015 IEEE International Symposium on Circuits and Systems (ISCAS 2015), Lisbon, Portugal, May 24-27, 2015.
  15. Kathryn L. Smith, Ryan S. Adams, and Thomas P. Weldon, “A Novel Broadband Fractal Metamaterial Unit Cell,” 2014 IEEE International Symposium on Antennas and Propagation and USNC-URSI National Radio Science Meeting, Memphis, TN, July 6–12, 2014.
  16. Varun S. Kshatri, John M. C. Covington III, Kathryn L. Smith, Joshua W. Shehan, Thomas P. Weldon, and Ryan S. Adams “Measurement and Simulation of a CMOS Current Conveyor Negative Capacitor for Metamaterials,” IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.
  17. John M. C. Covington III, Kathryn L. Smith, Joshua W. Shehan, Varun S. Kshatri, Thomas P. Weldon, and Ryan S. Adams “Measurement of a CMOS Negative Inductor for Wideband Non-Foster Metamaterials,” IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014.
  18. John M. C. Covington III, Kathryn L. Smith, Varun S. Kshatri, Joshua W. Shehan, Thomas P. Weldon, and Ryan S. Adams “A Cross-Coupled CMOS Negative Capacitor for Wideband Metamaterial Applications,” IEEE SoutheastCon 2014 Proceedings , pp. 1-4, Lexington, KY, Mar. 13-16, 2014