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A design technique for free-standing planar metasurfaces comprising an array of subwavelength resonant inclusions on an irregular grid is presented. The local E-field is evaluated as a sum of discrete and continuous contributions from neighboring and far-separated elements, respectively. The dimension of each resonator is determined from the polarizability relation. Free from the limitations associated with unit-cell analysis and design under periodic boundary conditions, the new design technique allows use of irregular grids for functional electromagnetic surfaces.
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Conformal irregular-grid metasurfaces comprising a dense array of free-standing dipoles
For large or infinite metasurfaces, a design tech- nique for a dense array of subwavelength resonators on an irregular grid is presented. For a given incident wave, the desired induced dipole moment distribution determines the local electric field that excites individual meta-atoms. The interaction field that accounts for mutual coupling is evaluated via a combination of discrete coupling from nearby resonators and continuous sheet current coupling from far-separated resonators. Meta-atoms placed on an irregular grid can be treated, greatly enhancing the flexibility in surface profile in practical conformal metasurfaces.
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- Award ID(s):
- 1930032
- PAR ID:
- 10347508
- Date Published:
- Journal Name:
- 2022 IEEE International Symposium on Antennas and Propagation
- Page Range / eLocation ID:
- 563-564
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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