Holographic antennas

Checcacci, P. F.; Russo, V.; Scheggi, A. M.

doi:10.1109/tap.1970.1139788

Cited by 96 publications

(38 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This control can be extended to surfaces through the use of tensor transmission-line metamaterials. The design approach will find use in the development of a wide range of electromagnetic devices including antennas and beam-forming networks, and may also find application in scattering control [58,59] and holography [60,61]. It could provide a novel approach to signal routing, the design of mode conversion devices [62], and the generation of extreme antenna apertures for super-directive radiation [63] or the excitation of Airy [64][65][66][67] and Bessel beams [68][69][70][71].…”

Section: Impactmentioning

confidence: 99%

Tailoring the Electromagnetic Near Field with Patterned Surfaces: Near-Field Plates

Grbic¹

2014

View full text Add to dashboard Cite

Air Force Materiel Command REPORT DOCUMENTATION PAGEForm Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704-0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YYYY)2 None Near-field plates and their potential uses were theoretically and experimentally investigated under this grant. Near-field plates are subwavelength-textured surfaces that can focus electromagnetic fields to deep subwavelength resolutions. Their operation was theoretically explained, design methodologies were formulated, and several prototypes developed at microwave frequencies. This research effort also included a second objective. The second objective was rather broad: to arbitrarily control electromagnetic fields within a 2D region of space using anisotropic and inhomogeneous metamaterials. This effort involved the development of circuit-based metamaterials that exhibit tensorial effective material parameters, and the implementation of electromagnetic devices using such metamaterials. It also involved the development of synthesis methods for anisotropic and inhomogeneous two dimentional (2D) metamaterials.metamaterials, metasurfaces, near-field plates, anisotropic and inhomogeneous materials.Anthony Grbic

show abstract

Section: Impactmentioning

confidence: 99%

Tailoring the Electromagnetic Near Field with Patterned Surfaces: Near-Field Plates

Grbic¹

2014

View full text Add to dashboard Cite

show abstract

“…The shape of the microstrip line inside the unit cell guarantees a sinusoidal variation of amplitude of the effective dielectric constant around an average value by a normalized amplitude of (modulation constant) according to (1) Both the formulation of the problem and the synthesis procedure of such a structure have been described in [6] and will be not repeated here. In the aforementioned reference, the study is limited to the analysis of the band limits of the DD.…”

Section: Single Unit Cellmentioning

confidence: 99%

“…Even if the first applications of holograms at microwave frequency date back to the 1970s [1], the topic has recently received significant interest from the scientific community. Presently, there are some research groups studying antennas based on this principle, recognizing new opportunities holographic surfaces offer in the field of antennas [2]- [5].…”

Section: Introductionmentioning

confidence: 99%

Analytically Expressed Dispersion Diagram of Unit Cells for a Novel Type of Holographic Surface

Matekovits

2010

Antennas Wirel. Propag. Lett.

View full text Add to dashboard Cite

A novel type of surface-impedance modulation mechanism for designing of microstrip-technology-based surface-waveexcited holographic antennas is proposed. The advanced radiating geometry consists of quasi-periodic arrangement of unit cells operating in the leaky-wave region. Flexible design requires a considerable numerical effort determining the dispersion characteristics of any possible unit cell present in the geometry. In this context, an analytic determination of the dispersion diagram for a unit cell with a sinusoidal modulation of the effective dielectric constant in its inside is presented. In this particular case, the solution is expressed in terms of Mathieu functions. The good agreement between numerical data and analytic solutions for an open, unbounded microstrip structure allows introducing the principle of a novel type of holographic surface obtained by cascading unit cells with different modulation parameters, where the phase of the radiating field can be geometrically controlled.

show abstract

“…While practical implementations for holograms [1][2][3] and holographic antennas [4,5] allow one to perform a wide variety of wavefront manipulation, the drive to control an EM wavefront at the highest resolution and across the widest possible angle has led to the emergence of a new class of EM surfaces. In this effort, artificial surfaces have been demonstrated which systematically manipulate the reflection or transmission phase of an incident wavefront.…”

Section: Introductionmentioning

confidence: 99%

Optical Huygens’ Metasurfaces with Independent Control of the Magnitude and Phase of the Local Reflection Coefficients

2014

View full text Add to dashboard Cite

Implementation of abrupt phase discontinuities along a surface has been the theme of recent research on electromagnetic metasurfaces. Simple functionalities such as reflecting, refracting, or focusing plane waves have been demonstrated with devices featuring phase discontinuities, but optical surfaces allowing independent magnitude and phase control on the scattered waves have yet to emerge. In this paper, we propose the first true optical Huygens' surface, which explicitly utilizes orthogonal electric and magnetic responses to realize total control on an optical surface's local reflection coefficients. This extends the functionality of metasurfaces to an unprecedented level. We first demonstrate that a nanorod gap-surface plasmon resonator can act as a Huygens' source. Thereafter, by properly tuning and rotating these resonators, we realize arbitrary reflection optical metasurfaces-surfaces for which the local reflection coefficients can be independently tailored in both magnitude and phase. We demonstrate the versatility of this approach through designs of a metasurface that asymmetrically reflects two copolarized beams and a Dolph-Tschebyscheff optical reflectarray.

show abstract

Holographic antennas

Cited by 96 publications

References 4 publications

Tailoring the Electromagnetic Near Field with Patterned Surfaces: Near-Field Plates

Tailoring the Electromagnetic Near Field with Patterned Surfaces: Near-Field Plates

Analytically Expressed Dispersion Diagram of Unit Cells for a Novel Type of Holographic Surface

Optical Huygens’ Metasurfaces with Independent Control of the Magnitude and Phase of the Local Reflection Coefficients

Contact Info

Product

Resources

About