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Time Integrated Electromagnetic Lagrangian: New Insights on Mutually Coupled Wide-band Antenna Design
  • Debdeep Sarkar ,
  • Yahia Antar
Debdeep Sarkar
Indian Institute of Science, Indian Institute of Science

Corresponding Author:[email protected]

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Yahia Antar
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In this paper, we develop a formalism based on either spatially or temporally integrated electromagnetic (EM) Lagrangian, which provides new insights about the near-field reactive energy around generic antennas for arbitrary spatio-temporal excitation signals. Using electric and magnetic fields calculated via FDTD technique and interpolation routines, we compute and plot the normalized values of space/time integrated EM Lagrangian around antennas. While the time-integration of EM Lagrangian sheds light onto the spatial distribution of inductive/capacitive reactive energy, time-variation of spatially integrated EM Lagrangian can help in design of ultra-wideband (UWB) MIMO antennas with low mutual coupling. The EM Lagrangian approach can assist in design of energy harvesting and wireless power transfer systems, as well as for electromagnetic interference mitigation applications.
2022Published in IEEE Journal on Multiscale and Multiphysics Computational Techniques volume 7 on pages 16-22. 10.1109/JMMCT.2022.3151706