Computational Electromagnetics (CEM)

CEM group concentrates on theoretical research in classical electromagnetic theory. Among the currently developed topics belong radiation properties of electrically small radiators and scatterers and their optimizations. Members of the group have for many years been also involved in classical antenna theory and field propagation in artificial composite materials.

Current research activities are strongly entangled with a “source concept” paradigm, in which all involved field quantities as well as engineering metrics are described solely in terms of electromagnetic sources. The idea of the source concept is sketched in the following figure.

CEM team collaborates with other department’s teams. Theses of various topics are supervised by members of the group.

Core Members of the Group:

 

Doctoral Students

Students

Visiting Reseachers

Past Members

      Vit Losenicky
      Michal Masek
Martin Strambach
Jakub Liska
Jonas Tucek
Vojtech Neuman
 
Lamyae Akrou
 

Projects

  • Virtual Prototyping and Validation of Electromagnetic Systems (2018-2021, TH04010373)
  • Fundamental Bounds on Electromagnetic Radiation and Scattering Phenomena and Associated Realizable Subforms (2019-2021, GA19-06049S)
  • Tools for Synthesis of Antennas and Sensors (2014-2017, TA04010457)
  • Source Concept of Electrically Small Antenna Synthesis  (2015-2017, GA15-10280Y)

 

Active External Collaborations

  • Brno University of Technology, Czech Republic (Petr Kadlec)
  • University of Lund, Sweden (Mats Gustafson, Casimir Ehrenborg)
  • University of Santa Clara, USA (Kurt Schab)
  • KTH Royal Institute of Technology, Sweden (Lars Johnsson)
  • Catholic University of Leuven, Belgium (Xuezhi Zhang, Guy Vandenbosch)
  • Université Nice Sophia Antipolis (Fabien Ferrero)
  • MECAS ESI s.r.o., Czech Republic (Jaroslav Rymus)

 

Journal Papers (Last Three Years)

Current and Antenna Optimization

  • M. Gustafsson and M. Capek: "Maximum Gain, Effective Area, and Directivity", IEEE Trans. Antennas Propag., vol. 67, no. 8, pp. 5282 - 5293, 2019.
  • M. Capek, L. Jelinek, M. Gustafsson: "Inversion-Free Evaluation of Nearest Neighbors in Method of Moments", IEEE Antennas and Wireless Propagation Letters, vol. xx, pp. xx - xx, 2019.
  • M. Capek, L. Jelinek, K. Schab, M. Gustafsson, B.L.G. Jonsson, F. Ferrero, and C. Ehrenborg: "Optimal Planar Electric Dipole Antennas: Searching for antennas reaching the fundamental bounds on selected metrics", IEEE Antenna and Propagation Magazine, vol. 61, no. 4., pp. 19 - 29, 2019.
  • M. Capek, L. Jelinek, and M. Gustafsson: "Shape Synthesis Based on Topology Sensitivity", IEEE Trans. Antennas Propag., vol. 67, no. 6, pp. 3889 - 3901, 2019.
  • M. Gustafsson, M. Capek, and K. Schab, "Tradeoff Between Antenna Efficiency and Q-Factor", IEEE Trans. Antennas Propag., vol. 67, pp. 2482 - 2493, 2019.
 
  • L Jelinek, K. Schab, and M. Capek, "The Radiation Efficiency Cost of Resonance Tuning", IEEE Trans. Antennas Propag, vol. 66, pp. 6716 - 6723, 2018.
 
  • M. Capek, M. Gustafsson, and K. Schab, "Minimization of antenna quality factor", IEEE Trans. Antennas Propag., vol. 65, pp. 4115 - 4123, 2017.
 
  • L. Jelinek and M. Capek, "Optimal currents on arbitrarily shaped surfaces," IEEE Trans. Antennas Propag., vol. 65, pp. 329 - 341, 2017.
 
  • M. Capek and L. Jelinek, "Optimal composition of modal currents for minimal quality factor Q", IEEE Trans. Antennas Propag., vol. 64, pp. 5230 - 5242, 2016.
 

Characteristic Modes

  • M. Masek, M. Capek, L. Jelinek, K. Schab, "Modal Tracking Based on Group Theory", IEEE Trans. Antennas Propag., vol. x, no. x, pp. x - x, 2019.
  • D. Tayli, M. Capek, L. Akrou, V. Losenicky, L. Jelinek, M. Gustafsson, "Accurate and Efficient Evaluation of Characteristic Modes", IEEE Trans. Antennas Propag., vol. 66, pp. 7066 - 7075, 2018.
 
  • M. Capek, V. Losenicky, L. Jelinek, and M. Gustafsson, "Validating the characteristic modes solvers," IEEE Trans. Antennas Propag., vol. 65, pp. 4134 - 4145, 2017.
 
  • M. Capek, P. Hazdra, M. Masek, and V. Losenicky, "Analytical representation of characteristic modes decomposition," IEEE Trans. Antennas Propag., vol. 65, pp. 713 - 720, 2017.
 

Stored Energy and Quality Factor Q

  • K. Schab, L. Jelinek, M. Capek, C. Ehrenborg, D. Tayli, G. A. E. Vandenbosch, M. Gustafsson, "Energy Stored by Radiating Systems," IEEE Access , vol. 6, pp. 10553 - 10568, 2018.
 
  • K. Schab, L. Jelinek, and M. Capek, "Recoverable energy of dissipative electromagnetic systems," 2017, eprint arXiv: 1701.06313. [Online]. Available: https://arxiv.org/abs/1701.06313
 
  • M. Capek and L. Jelinek, "Comments on On Stored Energies and Radiation Q," IEEE Trans. Antennas Propag., vol. 64, pp. 4575 - 4576, 2016.
 
  • M. Capek, L. Jelinek, and G. A. E. Vandenbosch, "Stored electromagnetic energy and quality factor of radiating structures," Proc. R. Soc. A, vol. 472, pp. 1 - 16, 2016.
 

Artificial Materials

  • L. Jelinek, O. Kratky, and M. Capek, "An evaluation of polarizability tensors of arbitrarily shaped highly conducting bodies," IET Microw. Antenna P., vol. 11, pp. 852 - 858, 2017.
 

/Edited 16. 09. 2019, MC/