Diffraction

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a screen by diffraction from a square aperture]] Diffraction refers to various phenomena which occur when a wave encounters an obstacle. Italian scientist Francesco Maria Grimaldi coined the word "diffraction" and was the first to record accurate observations of the phenomenon in 1665. (Wikipedia.org)






Conferences related to Diffraction

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2016 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

This is the annual symposium for the IEEE Antennas and Propagation Society, and it is joint with the US National Committee of URSI's Radio Science Meeting.

  • 2015 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

    The joint meeting is intended to provide an international forum for the exchange of information on state of-the-art research in the areas of antennas, propagation, electromagnetic engineering, and radio science.

  • 2014 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

    The joint meeting is intended to provide an international forum for the exchange of information on state of-the-art research in the areas of antennas, propagation, electromagnetic engineering, and radio science. Technical sessions will be held over a four-day period and workshops and short courses will occur on two days.

  • 2013 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

    The Symposium serves as the premier international forum for the exchange of information on state-of-the-art research in antennas, electromagnetic- wave propagation, radio science, and electromagnetic engineering.

  • 2012 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

    This conference covers all areas relating to antenna theory, design and practice: propagation, including theory, effects and system considerations; analytical and computational electromagnetics, scattering, diffraction, and radar cross sections; and applications pertaining to antennas and propagation, such as remote sensing, applied optics, millimeter and submillimeter wave techniques, telecommunications, broadcasting, electromagnetic effects on biological tissue.

  • 2011 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

    This meeting is intended to provide an international forum for the exchange of information on state-of-the-art research in antennas, propagation, and electromagnetic engineering.

  • 2010 IEEE International Symposium Antennas and Propagation and CNC/USNC/URSI Radio Science Meeting

    This is the premier annual conference on Antennas and Propagation, electromagnetics and radio science.

  • 2009 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

    This joint meeting is co-sponsored by the IEEE Antennas and Propagation Society (AP-S) and USNC-URSI Commissions A, B, C, D, E, F and K. Technical sessions (June 1-5), workshops and short courses (May 31 & June 6) are offered to provide a comprehensive and well balanced program. This meeting provides an international forum for the exchange of information on state-of-the-art research in antennas, propagation, and electromagnetic engineering.

  • 2008 IEEE Antennas and Propagation Society International Symposium and USNC/URSI National Radio Science Meeting

    This meeting is intended to provide an international forum for the exchange of information on state-of-the-art research in antennas, propagation, and electromagnetic engineering.


2013 13th Mediterranean Microwave Symposium (MMS)

2013 MMS will include distinguished keynote speakers, parallel oral presentations and poster sessions. Topics cover state-of-the art as well as current progress and recent developments in several emerging topics related to RF, microwave engineering and applications.

  • 2011 Mediterranean Microwave Symposium (MMS)

    MMS 2011 will provide an international forum for reporting progress and recent developments in RF and microwave and in many other related topics theory and applications . MMS'2011 will consist of technical and invited sessions and keynote and tutorial sessions covering the state-of-the art of several hot topics in RF and microwave engineering and technology.

  • 2010 10th Mediterranean Microwave Symposium (MMS)

    MMS2010 will provide an international forum for reporting progress and recent developments in RF and microwave theory and applications. Suggested topics are listed below, but consideration will be given to papers on other subjects.

  • 2009 Mediterranean Microwave Symposium (MMS)

    MMS 2005 will provide an international forum for reporting progress and recent developments in RF and microwave theory and applications. Suggested topics are listed below, but consideration will be given to papers on other subjects. Suggested Topics : 1. Propagation, Scattering and diffraction 2. Microwave and Millimeter-Wave Circuits. 3. Photonics, non linear optics and devices 4. Microwaves and millimeterwave devices CAD 5. RF and Wireless Technology and Applications 6. Interconnects 7. W


2013 XVIIIth International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)

Theoretical aspects of electrodynamicsWaveguide and photonic crystal structuresScattering and diffractionInverse problems and synthesisPropagation in complex mediaAntennas and antenna arraysNumerical methods in electrodynamicsAcoustics: theory and applications


Days on Diffraction 2013 (DD)

Mathematical aspects of wave propagation, Asymptotic techniques, Scattering and diffraction, Electromagnetics, Sound propagation and vibration, Elastic waves and seismology, Nonlinear waves, Microwave and quantum waveguides, Inverse problems, Numerical approaches, Non-stationary phenomena

  • Days on Diffraction 2012 (DD)

    Mathematical aspects of wave propagation, Asymptotic techniques, Scattering and diffraction, Electromagnetics, Sound propagation and vibration, Elastic waves and seismology, Nonlinear waves, Microwave and quantum waveguides, Inverse problems, Numerical approaches, Non-stationary phenomena.

  • Days on Diffraction 2011 (DD)

    Mathematical aspects of wave propagation Scattering and diffraction Sound propagation and vibration Nonlinear waves Inverse problems Non-stationary phenomena Asymptotic techniques Electromagnetics Elastic waves and seismology Microwave and quantum waveguides Numerical approaches Wavelets and applications

  • Days on Diffraction 2010 (DD)

    Mathematical aspects of wave propagation, Asymptotic techniques, Scattering and diffraction, Electromagnetics, Sound propagation and vibration, Elastic waves and seismology, Nonlinear waves, Microwave and quantum waveguides, Inverse Problems, Numerical approaches, Non-stationary phenomena, Wavelets and applications

  • Days on Diffraction 2009 (DD)

    Mathematical aspects of wave propagation , Asymptotic techniques, Scattering and diffraction, Electromagnetics, Sound propagation and vibration, Elastic waves and seismology, Nonlinear waves, Microwave and quantum waveguides, Inverse problems, Numerical approaches, Non-stationary phenomena, Wavelets and applications

  • Days on Diffraction 2008 (DD)

    The aim of the event is to bring together scientists working in the area of mathematical theory of waves' diffraction and propagation and researchers interested in application of various nature wave phenomena.

  • Days on Diffraction 2007

  • Days on Diffraction 2006

  • Days on Diffraction 2005

  • Days on Diffraction 2004

  • Days on Diffraction 2003

  • Days on Diffraction 2002

  • Days on Diffraction 2001

  • Days on Diffraction 2000

  • Days on Diffraction '99


2010 URSI International Symposium on Electromagnetic Theory (EMTS 2010)

all aspects of electromagnetic theory and its applications



Periodicals related to Diffraction

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Antennas and Propagation, IEEE Transactions on

Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.


Antennas and Wireless Propagation Letters, IEEE

IEEE Antennas and Wireless Propagation Letters (AWP Letters) will be devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation.


Lightwave Technology, Journal of

All aspects of optical guided-wave science, technology, and engineering in the areas of fiber and cable technologies; active and passive guided-wave componentry (light sources, detectors, repeaters, switches, fiber sensors, etc.); integrated optics and optoelectronics; systems and subsystems; new applications; and unique field trials.



Most published Xplore authors for Diffraction

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Xplore Articles related to Diffraction

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Analysis of a monopole mounted near an edge or a vertex

D. Pozar; E. Newman IEEE Transactions on Antennas and Propagation, 1982

The problem of a monopole mounted near the edge of a wedge or a vertex is considered. Three types of solutions-surface patch modeling, moment method/geometrical theory of diffraction (MM/GTD), and MM/eigenfunction-are presented, discussed, and compared with measurements. Results are in the form of input impedance and radiation patterns.


Several Maggi-Rubinowicz representations of the electric field

R. Meneghini; P. Shu; J. Bay IEEE Transactions on Antennas and Propagation, 1982

The Maggi-Rubinowicz technique for scalar and vector fields can be interpreted as a transformation of an integral over an open surface to a line integral around the rim and geometrical optics terms. Using this transformation, Maggi- Rubinowicz analogues are obtained for several integral representations of the electric field. In the case of diffraction from a circular aperture, numerical comparisons between ...


Extensity of C3S EBSD Database and Its Structure Calculation

Jian Tian; Tao Wei; Hai'jun Xu 2010 2nd International Workshop on Database Technology and Applications, 2010

Crystal morphology, crystal structure and atomic coordinates of tricalcium silicate (C3S, 3CaO * SiO2) which is the main components of cement clinker were studied. Through Xray powder diffraction analysis and associated calculation, we gained the C3S precision cell parameters and atomic coordinates, then built three-dimensional models of C3S crystal structure. A C3S crystal electron backscatter scattering diffraction (EBSD) precise crystallographic ...


High energy hybrid fibre regenerative amplifier for nanosecond laser pulse

Zhi Qiao; Xiaochao Wang; Wei Fan; Zunqi Lin 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2015

A hybrid fibre-bulk regenerative amplifier with maximum output energy of 600uJ at 1Hz for narrow-linewidth nanoseconds laser is demonstrated. Nearly diffraction limited beam is obtained. The total gain is more than 63dB.


The effect of rounding vertices on the diffraction from polygons and other scatterers

Paul D. Smith; Audrey J. Markowskei 2016 URSI International Symposium on Electromagnetic Theory (EMTS), 2016

The changes induced in the near- and far-field scattering by rounding the corners of an illuminated obstacle are discussed as a function of the radius of curvature near such corners. Dirichlet, Neumann or impedance boundary conditions are imposed on the surface. An integral equation formulation is employed; it is found that a graded mesh is necessary to obtain accurate results ...


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Educational Resources on Diffraction

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eLearning

Analysis of a monopole mounted near an edge or a vertex

D. Pozar; E. Newman IEEE Transactions on Antennas and Propagation, 1982

The problem of a monopole mounted near the edge of a wedge or a vertex is considered. Three types of solutions-surface patch modeling, moment method/geometrical theory of diffraction (MM/GTD), and MM/eigenfunction-are presented, discussed, and compared with measurements. Results are in the form of input impedance and radiation patterns.


Several Maggi-Rubinowicz representations of the electric field

R. Meneghini; P. Shu; J. Bay IEEE Transactions on Antennas and Propagation, 1982

The Maggi-Rubinowicz technique for scalar and vector fields can be interpreted as a transformation of an integral over an open surface to a line integral around the rim and geometrical optics terms. Using this transformation, Maggi- Rubinowicz analogues are obtained for several integral representations of the electric field. In the case of diffraction from a circular aperture, numerical comparisons between ...


Extensity of C3S EBSD Database and Its Structure Calculation

Jian Tian; Tao Wei; Hai'jun Xu 2010 2nd International Workshop on Database Technology and Applications, 2010

Crystal morphology, crystal structure and atomic coordinates of tricalcium silicate (C3S, 3CaO * SiO2) which is the main components of cement clinker were studied. Through Xray powder diffraction analysis and associated calculation, we gained the C3S precision cell parameters and atomic coordinates, then built three-dimensional models of C3S crystal structure. A C3S crystal electron backscatter scattering diffraction (EBSD) precise crystallographic ...


High energy hybrid fibre regenerative amplifier for nanosecond laser pulse

Zhi Qiao; Xiaochao Wang; Wei Fan; Zunqi Lin 2015 11th Conference on Lasers and Electro-Optics Pacific Rim (CLEO-PR), 2015

A hybrid fibre-bulk regenerative amplifier with maximum output energy of 600uJ at 1Hz for narrow-linewidth nanoseconds laser is demonstrated. Nearly diffraction limited beam is obtained. The total gain is more than 63dB.


The effect of rounding vertices on the diffraction from polygons and other scatterers

Paul D. Smith; Audrey J. Markowskei 2016 URSI International Symposium on Electromagnetic Theory (EMTS), 2016

The changes induced in the near- and far-field scattering by rounding the corners of an illuminated obstacle are discussed as a function of the radius of curvature near such corners. Dirichlet, Neumann or impedance boundary conditions are imposed on the surface. An integral equation formulation is employed; it is found that a graded mesh is necessary to obtain accurate results ...


More eLearning Resources

IEEE-USA E-Books

  • Analytical Techniques for Materials Characterization

    This chapter contains sections titled: Introduction and Overview X??-??ray Diffraction (XRD) Raman Spectroscopy Scanning Probe Microscopy (SPM) Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray Spectroscopy (EDX or EDS) Auger Electron Spectroscopy (AES) X??-??ray Photoelectron Spectroscopy (XPS) Secondary Ion Mass Spectrometry (SIMS) Summary This chapter contains sections titled: Exercises References

  • Index

    Engineering has been an essential collaborator in biological research and breakthroughs in biology are often enabled by technological advances. Decoding the double helix structure of DNA, for example, only became possible after significant advances in such technologies as X-ray diffraction and gel electrophoresis. Diagnosis and treatment of tuberculosis improved as new technologies -- including the stethoscope, the microscope, and the X-ray -- developed. These engineering breakthroughs take place away from the biology lab, and many years may elapse before the technology becomes available to biologists. In this book, David Lee argues for concurrent engineering -- the convergence of engineering and biological research -- as a means to accelerate the pace of biological discovery and its application to diagnosis and treatment. He presents extensive case studies and introduces a metric to measure the time between technological development and biological discovery.Investigating a series of major biological discoveries that range from pasteurization to electron microscopy, Lee finds that it took an average of forty years for the necessary technology to become available for laboratory use. Lee calls for new approaches to research and funding to encourage a tighter, more collaborative coupling of engineering and biology. Only then, he argues, will we see the rapid advances in the life sciences that are critically needed for life-saving diagnosis and treatment.

  • Electron Diffraction

    This chapter contains sections titled: Overview Principles of Low-Energy Electron Diffraction LEED Equipment LEED Kinematics Surface Reconstruction Surface Lattices and Superstructures Silicon Reconstructions III-V Compound Semiconductor Reconstructions Reflection High-Energy Electron Diffraction Summary

  • Dispersion Compensation in Holograms Reconstructed by Femtosecond Light Pulses

    This chapter describes how the spatiotemporal dispersion associated with the diffraction of broadband femtosecond light pulses through computer generated holograms (CGHs) can be compensated to a first order with a properly designed dispersion compensation module (DCM). The angular dispersion of the beam associated to CGHs leads to both spatial and temporal distortion of the pulse. Some experiments in one-shot second harmonic generation, wide-field two-photon microscopy, and parallel micromachining are shown to study the quality of the compensation performed with the DCM.

  • Rigorous Diffraction Theory for 360?? Computer-Generated Holograms

    Most algorithms for a computer-generated hologram using FFT are effective only under the condition that both the input and observation surfaces are finite planes that are parallel to each other. To synthesize a 360 degree hologram in a computer, a numerical simulation of the diffraction on the non planar observation surfaces is required. At first, we propose a simple but rigorous equation which describes the relation between the diffracted wavefront of a 3-D object and its 3-D Fourier spectrum. In this method, an exact solution of the diffraction integral is given by the Green function. This principle gives us an intuitive understanding of calculation processes for various diffraction situation. Alternatively, fast computation solutions for spherical computer generated hologram employing PSF (convolution method) is proposed. We start with Helmholtz equation, with considering a boundary value problem in spherical co-ordinates. The solution define the transfer function and the spectral decomposition of the wave field in the spherical surface. Using the transfer function and the wave spectrum we can develop a spectral propagation formula (for spherical surfaces in spherical coordinates) analogous to the angular spectrum formula. Some computer simulation and experimental results are presented.

  • Electromagnetic Boundary Value Problems

    This chapter contains sections titled: Introduction SLP1 Extension to Three Dimensions SLP1 in Two Dimensions SLP2 and SLP3 Extension to Three Dimensions The Parallel Plate Waveguide Iris in Parallel Plate Waveguide Aperture Diffraction Scattering by a Perfectly Conducting Cylinder Perfectly Conducting Circular Cylinder Dyadic Green's Functions This chapter contains sections titled: Problems References

  • Bistatic Scattering at a Finite-Length Cylinder

    The shadow radiation is the constituent part of the physical optics (PO) field. It was noted there that this field concentrates in the vicinity of the shadow region. This chapter verifies this property by numerical investigation of the shadow radiation generated by the finite-length cylinder. The most appropriate procedure for doing this work would be the direct application of the shadow contour theorem. It presents numerical investigation of the scattered field. The chapter considers its physical structure and presents simple high-frequency asymptotics for the directivity pattern. It deals with the E-Polarization and the H-Polarization. Finally, the chapter discusses about the PO shooting-through rays and their cancellation by Fringe rays, and the refined asymptotics for the specular beam reflected from the lateral surface.

  • Plane Boundaries

    This chapter contains sections titled: Plane Wave Incident on a Plane Boundary Propagation Through a Layered Medium The Sommerfeld Dipole Problem Multilayered Structures Periodic Structures Field Penetration Through Apertures Edge Diffraction

  • Appendix to Section 7.9.2: Field d Radiated by Modified Uniform Currents Induced on Elementary Strips (P. Ya. Ufimtsev)

    No Abstract.

  • Propagation Mechanisms

    This chapter gives an overview of the basic physical processes determining the propagation of wireless signals. We start out with free-space propagation, reviewing the concepts of effective antenna area, free-space pathloss, and Friis' law. We then turn to the reflection from, and transmission into, dielectric or conducting materials: Snell¿s law gives the appropriate transmission and reflection coefficients for different polarizations, namely TE and TM waves. From insights gathered here, we then compute the pathloss law that holds when both line-of-sight and ground reflection is present. We next turn to the process of wave diffraction, first describing the diffraction by a single screen that can be quantified in terms of the Fresnel integral, and interpreted by means of Fresnel zones. We then describe different approximation methods for computing the diffraction by multiple screens: Bullington method, Deygout method, and Epstein-Petersen method. We next turn to the diffuse scattering of radiation on rough surfaces, which can be described by the Kirchhoff method or the (more accurate, but also more complicated) perturbation method. A discussion of waveguiding in corridors and street canyons concludes the chapter.



Standards related to Diffraction

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Jobs related to Diffraction

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