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Creators/Authors contains: "Kwon, Do-Hoon"

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  1. (, IEEE)
    Free, publicly-accessible full text available April 19, 2027
  2. ; ; ; ; (, IEEE Journal of Selected Topics in Electromagnetics, Antennas and Propagation)
    Free, publicly-accessible full text available July 17, 2027
  3. ; ; ; ; (, IEEE)
    Free, publicly-accessible full text available April 19, 2027
  4. ; (, 2024 IEEE International Symposium on Antennas and Propagation)
    A penetrable tensorial metasurface on a grounded dielectric shell is presented for 3-D spherical invisibility cloaking. The spatially modulated impedance surface transforms the incident plane wave into a surface wave on the lit side and carries the power to the shadow side. Power is continuously released as a leaky wave with a wavefront consistent with the incident plane wave on the shadow side. A numerical design example for a four-wavelength-diameter conducting sphere is presented, and the cloaking effectiveness is validated by simulation. 
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    Accepted Manuscript Full Text Available
  5. (, IEEE Transactions on Antennas and Propagation)
    Full Text Available 
  6. (, 2022 IEEE International Symposium on Antennas and Propagation)
    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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    Accepted Manuscript Full Text Available
  7. ; (, 2022 IEEE International Symposium on Antennas and Propagation)
    A planar loaded microstrip network metamaterial on an irregular grid for modeling 2-D electromagnetic environment in TE polarization is presented. The technique is applied to a Luneburg lens example toward printed circuit implementation and verification. 
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    Full Text Available 
  8. (, International symposium digest antennas and propagation)
    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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    Accepted Manuscript Full Text Available