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.


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


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.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Device and Materials Reliability, IEEE Transactions on

Provides leading edge information that is critical to the creation of reliable electronic devices and materials, and a focus for interdisciplinary communication in the state of the art of reliability of electronic devices, and the materials used in their manufacture. It focuses on the reliability of electronic, optical, and magnetic devices, and microsystems; the materials and processes used in the ...


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Most published Xplore authors for Diffraction

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Xplore Articles related to Diffraction

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Physical properties of Ni/sub 2/MnGe alloy films with different atomic orders

[{u'author_order': 1, u'affiliation': u'Quantum Photonic Sci. Res. Center, Hanyang Univ., Seoul, South Korea', u'full_name': u'R. J. Kim'}, {u'author_order': 2, u'affiliation': u'Quantum Photonic Sci. Res. Center, Hanyang Univ., Seoul, South Korea', u'full_name': u'N. N. Lee'}, {u'author_order': 3, u'affiliation': u'Quantum Photonic Sci. Res. Center, Hanyang Univ., Seoul, South Korea', u'full_name': u'B. J. Kim'}, {u'author_order': 4, u'affiliation': u'Quantum Photonic Sci. Res. Center, Hanyang Univ., Seoul, South Korea', u'full_name': u'Y. P. Lee'}, {u'author_order': 5, u'full_name': u'Y. V. Kudryavtsev'}, {u'author_order': 6, u'full_name': u'K. W. Kim'}] 2005 IEEE International Magnetics Conference (INTERMAG), None

Ni/sub 2/MnGe films with significantly different structural orders were fabricated, and the influence of atomic ordering on various physical properties has been investigated. The structural characterization was performed by X-ray diffraction (XRD). The temperature dependence of magnetization was investigated with a superconducting quantum interference device. The optical properties were obtained using a spectroscopic ellipsometer, and the magneto-optical properties were understood ...


Antenna Performance in the Presence of Diffuse Multipath

[{u'author_order': 1, u'affiliation': u'COMSAT Corporation, Washington, D. C. 20024', u'full_name': u'Terrence P. McGarty'}] IEEE Transactions on Aerospace and Electronic Systems, 1976

Diffuse multipath is a random phenomenon that arises out of the diffraction of waves from rough surfaces. This form of multipath can in turn affect the angle estimation performance of monopulse antenna systems. In order to evaluate its effect, it is necessary to obtain the channel spread function that results. This function is basically the wave number spectrum of the ...


Rare-earth transition metal carbides

[{u'author_order': 1, u'affiliation': u'University of Delaware', u'full_name': u'Z. X. Tang'}, {u'author_order': 2, u'full_name': u'E. W. Singleton'}, {u'author_order': 3, u'full_name': u'G. C. Hadjipanayis'}] 1992 IEEE International Magnetics Conference (INTERMAG), None

First Page of the Article ![](/xploreAssets/images/absImages/00696377.png)


Some extensions of the exact line integral representation of the physical optics scattered field to multiple interactions between planar surfaces

[{u'author_order': 1, u'affiliation': u'MOTHESIM, 9, Villa Pierre Loti, Paris, France', u'full_name': u'F. Molinet'}] 2013 International Conference on Electromagnetics in Advanced Applications (ICEAA), None

An exact transformation of the double surface integral representation of the electric physical optics (PO) scattered field by two perfectly conducting flat plates, into a double line integral on the contours of the plates and an integral along a generatrix of the cone having the observation point as the vertex and the contour of the second plate as the basis, ...


Radar cross section of rectangular flat plates as a function of aspect angle

[{u'author_order': 1, u'affiliation': u'Cornell Aeronautical Lab. Inc., Buffalo, NY, USA', u'full_name': u'R. Ross'}] IEEE Transactions on Antennas and Propagation, 1966

An investigation of the scattering from rectangular flat plates has been carried out to determine analytical formulations suitable for the estimation of radar cross section. Simple physical optics theory provides an accurate means of predicting the near-specular values of plate cross section but fails to account for polarization dependence and detailed shape of the cross section vs. angle curve in ...


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Educational Resources on Diffraction

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eLearning

No eLearning Articles are currently tagged "Diffraction"

IEEE-USA E-Books

  • 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.

  • Numerical and Experimental Examples

    This chapter provides some numerical examples of measure of propagation velocity based on the diffraction curves. The real ground penetrating radar (GPR) pulses cannot have zero duration, because the band of the system (in particular the band of the antennas) is never infinite. In the real word, the diffraction curves have some ?>thickness,?> and this constitutes an unavoidable source of uncertainty, both with regard to the propagation velocity of the waves and with regard to the depth of the buried targets. The chapter describes some examples about the needed spatial step, frequency step and the correlated achievable horizontal and vertical resolutions. It shows some examples regarding the effect of the height of the observation domain and background removal. The chapter demonstrates application of 2D and 3D migration algorithms to field data.

  • Ray and Caustic Asymptotics for Edge Diffracted Waves

    The asymptotics for edge-diffracted waves can be presented in another form that reveals their ray structure. Ray asymptotics were postulated in the geometrical theory of diffraction (GTD). GTD can be interpreted as the ray asymptotic form of physical theory of diffraction (PTD) for total diffracted field. In contrast to PTD, GTD is not applicable in regions where the field does not have a ray structure and where the actual diffraction phenomena happen. The ray asymptotics are not valid at caustics, where they predict an infinitely large field intensity. Caustic asymptotics are presented for both acoustic and electromagnetic waves. These asymptotics have the same structure and differ only in the coefficients. This chapter discusses the relationships between PTD and GTD. PTD is a source-based technique and GTD belongs to ray- type theory.

  • Programmable Microscopy

    Programmable microscopy is a technique where different microscopic imaging methods are realized by changing the illumination or the filtering before the images are captured. To this end, typically spatial light modulators are employed. Examples of imaging methods include Zernike's phase contrast, dark field imaging, differential interference contrast, aberration correction, depth scanning microscopy, and stereo microscopy. By means of the light modulator, the imaging can be adapter to the specimen under test. After recording of multiple images which have been obtained using different imaging methods or parameter settings the individual images are digitally combined by postprocessing.

  • Ray‐Tracing Modeling

    This chapter contains sections titled: Introduction Main Physical Phenomena Involved in Propagation Incorporating the Influence of Vegetation Ray‐Tracing Methods References

  • Ray-based and Wavefront-based 3D Representations for Holographic Displays

    A three-dimensional (3D) holography display is capable of reproducing extremely high-quality 3D images by wavefront reconstruction, and its advantage against ray-based 3D display is the capability to reproduce deep 3D scenes at high resolution. One of the important issue in holographic display is the calculation of holograms from 3D data, because it requires wavefront- based rendering that is much more complicated than conventional ray-based computer graphics. Although ray-based rendering techniques have been applied to hologram computation, they cause reduction of resolution as in the case of ray-based displays. This chapter addresses a technology that converts 3D data represented by light-rays into wavefront data and vice versa at ray-sampling (RS) planes defined near the objects to be displayed, and a new method is proposed for the computation of hologram using a RS plane. The proposed method enables to employ the advanced rendering techniques for occlusion processing, surface shading, specular or glossy surfaces, and translucent objects in the computation of holograms, without loss of the advantage of holographic displays. A scanning vertical camera array system is presented for capturing high-density light-field information, which are applied to computational holography and holographic prints. Experimental results demonstrate that the proposed ray-wavefront conversion technique allows the realistic display of deep 3D images at high resolution.

  • Design for Manufacturing

    This chapter contains sections titled: The Lithographic Challenge Software Solutions: Reticle Enhancement Techniques Hardware Solutions Process Solutions

  • Multiple Diffraction of Edge Waves: Grazing Incidence and Slope Diffraction

    This chapter investigates two special cases. The first case is a grazing incidence of edge waves on acoustically hard planar plates. In the asymptotic theory, the incident wave is approximated by an equivalent plane wave. The second case that also needs special treatment occurs when the scattering edge is located in the zero of the incident wave. This is the case for slope diffraction. The chapter considers the important one to be the slope diffraction of the first order, when the first derivative of the incident wave is not equal to zero. Such a situation occurs, for example, in reflector antennas, when one tries to decrease side lobes, and in the process of multiple diffraction between several scatterers or between different parts of the same scatterer. The chapter founds ray asymptotics using the stationary- phase technique.

  • Digital Diffractive Optics: Analytic Type

    This chapter contains sections titled: Analytic and Numeric Digital Diffractives The Notion of Diffraction Orders Diffraction Gratings Diffractive Optical Elements Diffractive Interferogram Lenses

  • 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.



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