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Broadband metamaterials in electromagnetics : technology and applications


PrefaceBroadband Anisotropic Metamaterials for Antenna ApplicationsIntroductionMM Coatings for Monopole Bandwidth ExtensionMonopole with Anisotropic Material CoatingUnit Cell Design and Full-wave SimulationsExperimental ResultsC-Band DesignAnisotropic MM Lenses for Directive RadiationLow-Profile AZIM Coating for Slot AntennaDispersion of grounded AZIM slabInfinite TMz radiating source with realistic AZIM coatingHigh-gain SIW-fed slot antenna with realistic AZIM coatingAnisotropic MM Lens for Crossed-Dipole AntennaConfiguration and unit cell designNumerical and experimental resultsAnisotropic MM Multibeam Antenna LensTwo-dimensional/three-dimensional AZIM lens concept and numerical resultsRealistic AZIM lens for monopole antennaAZIM Lens for Reconfigurable Beam SteeringConclusionReferencesBroadband Low-loss Metamaterial- Enabled Horn AntennasIntroductionHorn Antennas as Reflector FeedsSoft and Hard Horn AntennasMetamaterial Horn AntennasDesign and Modeling of Metamaterial Implementations for Soft and Hard SurfacesPlane Wave Model of MetasurfacesEquivalent Homogeneous Metamaterial ModelDesign Goals and Optimization MethodsMetasurface Design ExamplesCanonical ExamplesPrinted-Patch Balanced Hybrid MetasurfaceWire-Grid MetasurfaceOctave-Bandwidth Single-Polarization Horn Antenna with Negligible LossApplication BackgroundModeling and SimulationPrototype and MeasurementsDual-Polarization Ku-Band Metamaterial HornApplication BackgroundModeling and SimulationPrototype and MeasurementsImproved-Performance Horn Enabled by Inhomogeneous MetasurfacesMotivation and RationaleEffects of Parameter Variations on Metasurface CharacteristicsMetasurfaces in Cylindrical WaveguidesComparison of Metahorns with Homogeneous and Inhomogeneous MetasurfacesSummary and ConclusionsReferencesRealization of Slow Wave Phenomena Using Coupled Transmission Lines and Their Application to Antennas and Vacuum ElectronicsIntroductionSlow Wave TheoryPeriodic StructuresSecond-Order DispersionCoupled Transmission Line AnalysisDerivationCoupling of modesHigher-Order Dispersion EngineeringGraphical analysisRealizations of higher-order dispersionApplications of Slow WavesTraveling Wave TubesAntenna Miniaturization, Directivity, and Bandwidth ImprovementLeaky-Wave AntennaReferencesDesign Synthesis of Multiband and Broadband Gap Electromagnetic MetasurfacesIntroductionCapacitively Loaded Mushroom-Type EBGTheoryCircuit Representation of Capacitively Loaded Mushroom-Type EBGNumerical ExamplesExperimental VerificationFree-Space SetupOmnidirectional EBG MetasurfaceTunable Absorbers Based on Mushroom- Type MetasurfacesNarrowband Reconfigurable AbsorberMultiband AbsorberBroadband Tunable AbsorberConclusionReferencesTemporal and Spatial Dispersion Engineering Using Metamaterial Concepts and StructuresIntroductionRadio-Analog Signal ProcessingR-ASP ParadigmPhasersSpatial Phasers for Real-Time Spectrum AnalysisDiffraction GratingsLeaky-Wave AntennasComposite Right/Left-Handed Transmission LinesLWA-Based Real-Time Spectrum AnalyzersOne-Dimensional Real-Time Spectrum AnalyzerRTSA Features and Time-Frequency Resolution TradeoffSpatio-Temporal 2D RTSAMetasurface-Based Spatial 2D RTSAConventional 2D Spectral DecompositionMetasurface TransmittanceNumerical ExamplesSummaryReferencesBroadband Performance of Lenses Designed with Quasi-Conformal Transformation OpticsIntroductionMathematics of Transformation OpticsConformal MappingTransformation OpticsQuasi-Conformal Transformation OpticsExamples of qTO-Derived Lenses Inspired by Classical DesignsBroadband Wide-Angle Lenses Derived from Refractive LensesBroadband Wide-Angle Lenses Derived from Diffractive LensesBroadband Directive Multibeam Lens AntennasBroadband qTO-Derived Anti-Reflective CoatingsWavefront Matching Method as an Alternative to qTODispersion Correction in qTO-Enabled GRIN LensesGeometrical-Optics Inspired SolutionRadial GRINAxial GRINRadial-axial GRINGeometrical trade-offsTransformation-Optics Inspired SolutionConclusionReferencesBroadband Chirality in Twisted MetamaterialsIntroductionModal Solution to Twisted MetamaterialsConstruction of the Eigenvalue ProblemA Twisted Metamaterial with Perfectly Conducting InclusionsEffect of the Twist Angle on the StopbandSupercell and Periodic StructuresComparison with Full-Wave SimulationsPolarizationBroadband Polarizer DesignConclusionReferencesBroadband Optical Metasurfaces and MetamaterialsIntroductionBroadband Dispersion-Engineered Optical MetamaterialsIntroduction to Dispersion EngineeringBroadband Plasmonic Metamaterial Filters with Passive Beam SteeringBroadband Metamaterial Absorbers for the InfraredIntroduction to Metamaterial AbsorbersGA Optimization of Metamaterial AbsorbersSuper-Octave Metamaterial Absorbers for the InfraredChoice of Metals in Broadband AbsorbersMulti-Octave Metamaterial Absorbers for the InfraredBroadband Optical MetasurfacesIntroduction to MetasurfacesBroadband Optical Metasurface-Based WaveplatesBroadband Optical Light Steering with MetasurfacesBroadband Metasurface-Based Planar MicrolensesReferences
 
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