165 citations · 609 across the 38 of their papers we have counts for
41 papers
Part 2: Spatially Dispersive Metasurfaces -- IE-GSTC-SD Field Solver with Extended GSTCs
Tom J. Smy, João G. Nizer Rahmeier, Jordan Dugan +1
An Integral Equation (IE) based field solver to compute the scattered fields from spatially dispersive metasurfaces is proposed and numerically confirmed using various examples inv…
Part 1: Spatially Dispersive Metasurfaces: Zero Thickness Surface Susceptibilities & Extended GSTCs
João G. Nizer Rahmeier, Tom J. Smy, Jordan Dugan +1
A simple method to describe spatially dispersive metasurfaces is proposed where the angle-dependent surface susceptibilities are explicitly used to formulate the zero thickness she…
Surface Susceptibilities as Compact Full-Wave Simulation Models of Fully-Reflective Volumetric Metasurfaces
Ville Tiukuvaara, Tom. J. Smy, Karim Achouri +1
While metasurfaces (MSs) are constructed from deeply-subwavelength unit cells, they are generally electrically large and full-wave simulations of the complete structure are computa…
Metasurface Near-field Measurements with Incident Field Reconstruction using a Single Horn Antenna
Ville Tiukuvaara, Kan Wang, Tom J. Smy +1
A simple method of superimposing multiple near field scans using a single horn antenna in different configurations to characterize a planar electromagnetic metasurface is proposed…
IE-GSTC Metasurface Field Solver using Surface Susceptibility Tensors with Normal Polarizabilities
Tom. J. Smy, Ville Tiukuvaara, Shulabh Gupta
An Integral Equation (IE) based electromagnetic field solver using metasurface susceptibility tensors is proposed and validated using variety of numerical examples in 2D. The propo…
Ray-Optical Evaluation of Scattering from Electrically Large Metasurfaces Characterized by Locally Periodic Surface Susceptibilities
Scott Stewart, Yvo L. C. de Jong, Tom J. Smy +1
This work continues the development of the raytracing method of [1] for computing the scattered fields from metasurfaces characterized by locally periodic reflection and transmissi…
Metasurface Reflector with Real-Time Independent Magnitude and Phase Control
Ahmed Z. Ashoor, Shulabh Gupta
A novel metasurface unit cell architecture is proposed to enable independent control of the reflection magnitude and phase at a desired operation frequency, while maintaining linea…
Integrated Multi-Port Leaky-Wave Antenna Multiplexer/Demultiplexer System for Millimeter-Wave Communication
Mohamed K. Emara, Shulabh Gupta
A novel application of leaky-wave antennas (LWAs) as integrated antennas and multiplexers/demultiplexers is proposed and experimentally demonstrated in the millimeter-wave band at…
Surface Susceptibility Synthesis of Metasurface Skins/Holograms for Electromagnetic Camouflage/Illusions
Tom J. Smy, Shulabh Gupta
A systematic numerical framework based on Integral Equations and Generalized Sheet Transition Conditions (IE-GSTCs) is presented in 2D to synthesize closed metasurface holograms an…
Floquet Analysis of Space-Time Modulated Huygens' Metasurfaces with Lorentz Dispersion
Ville Tiukuvaara, Tom J. Smy, Shulabh Gupta
A rigorous semi-analytical Floquet analysis is proposed for a zero-thickness space-time modulated Huygens' metasurface to model and determine the strengths of the new harmonic comp…
Millimeter-Wave Integrated Side-Fire Leaky-Wave Antenna and its Application as a Spectrum Analyzer
Daniel J. King, Mohamed K. Emara, Shulabh Gupta
An analog, low-profile and shielded spectrum analyzer is proposed for operation at mm-wave frequencies around the 60 GHz band based on a novel side-fire Leaky-Wave Antenna (LWA) co…
Complex Eigenmodes and Eigenfrequencies in Electromagnetics
João G. Nizer Rahmeier, Ville Tiukuvaara, Shulabh Gupta
A first comprehensive treatment on complex eigenmodes is presented for general lossy traveling-wave electromagnetic structures where the per unit length propagation phase shift ($β…
Millimeter-Wave Huygens' Transmit-Arrays based on Coupled Metallic Resonators
Soichi Sakurai, João G. N. Rahmeier, Takashi Tomura +2
A novel Huygens' transmit-array is proposed based on a coupled-resonator approach where two identical elliptical metallic patches with an elliptical hole separated by a dielectric…
Surface Susceptibility Synthesis of Metasurface Holograms for creating Electromagnetic Illusions
Tom. J. Smy, Scott A. Stewart, Shulabh Gupta
A systematic approach is presented to exploit the rich field transformation capabilities of Electromagnetic (EM) metasurfaces for creating a variety of illusions using the concept…
Scattering Field Solutions of Metasurfaces based on the Boundary Element Method (BEM) for Interconnected Regions
Scott A. Stewart, Sanam Moslemi-Tabrizi, Tom. J. Smy +1
A methodology for determining the scattered Electromagnetic (EM) fields present for interconnected regions with common metasurface boundaries is presented. The method uses a Bounda…
Integrated Generalized Sheet Transition Conditions (GSTCs) in a Yee-Cell based Finite-Difference Time-Domain (FDTD) Simulation of Electromagnetic Metasurfaces
Tom. J. Smy, Scott Stewart, Shulabh Gupta
A finite-difference time-domain (FDTD) simulation of broadband electromagnetic metasurfaces based on direct in- corporation of Generalized Sheet Transition Conditions (GSTCs) insid…
Space-Time Modulation Induced Non-reciprocity in Electromagnetic Metasurfaces
Shulabh Gupta, Scott. A. Stewart, Tom J. Smy
Space-time modulation induced non-reciprocity in EM metasurfaces is proposed and numerically demonstrated using rigorous Generalized Sheet Transitions Conditions (GSTCs) under obli…
Real-Time Dispersion Code Multiple Access (DCMA) for High-Speed Wireless Communications
Lianfeng Zou, Shulabh Gupta, Christophe Caloz
We model, demonstrate and characterize Dispersion Code Multiple Access (DCMA) and hence show the applicability of this purely analog and real-time multiple access scheme to high-sp…
Floquet-Mode Solutions of Space-Time Modulated Huygens' Metasurfaces
Shulabh Gupta, Tom. J. Smy, Scott A. Stewart
A rigorous Floquet mode analysis is proposed for a zero thickness space-time modulated Huygens' metasurface to model and determine the strengths of the new harmonic components of t…
Finite-Difference Time-Domain (FDTD) Modelling of Space-Time Modulated Metasurfaces
Scott A. Stewart, Tom J. Smy, Shulabh Gupta
A finite-difference time-domain (FDTD) modelling of finite-size zero thickness space-time modulated Huygens' metasurfaces based on Generalized Sheet Transition Conditions (GSTCs),…
A Simple Picosecond Pulse Generator Based on a Pair of Step Recovery Diodes
Lianfeng Zou, Shulabh Gupta, Christophe Caloz
A picosecond pulse generator based on a pair of step recovery diodes (SRD), leveraging the transient response of the SRD PN junction and controlling the pulse width by a resistor,…
Exact Finite-Difference Time-Domain Modelling of Broadband Huygens' Metasurfaces with Lorentz Dispersions
Tom J. Smy, Shulabh Gupta
An explicit time-domain finite-difference technique for modelling zero-thickness Huygens' metasurfaces based on Generalized Sheet Transition Conditions (GSTCs), is proposed and dem…
Nonreciprocal Nongyrotropic Magnetless Metasurface
Sajjad Taravati, Bakhtiar A. Khan, Shulabh Gupta +2
We introduce a nonreciprocal nongyrotropic magnetless metasurface. In contrast to previous nonreciprocal structures, this metasurface does not require a biasing magnet, and is ther…
Dielectric Resonator Metasurface for Dispersion Engineering
Karim Achouri, Ali Yahyaoui, Shulabh Gupta +2
We introduce a practical dielectric metasurface design for microwave frequencies. The metasurface is made of an array of dielectric resonators held together by dielectric connectio…