358 resources related to Electromagnetic refraction
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2021 IEEE Photovoltaic Specialists Conference (PVSC)
Photovoltaic materials, devices, systems and related science and technology
2020 IEEE International Symposium on Antennas and Propagation and North American 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 area of antennas and propagation, electromagnetic engineering and radio science
All areas of ionizing radiation detection - detectors, signal processing, analysis of results, PET development, PET results, medical imaging using ionizing radiation
2020 IEEE Radar Conference (RadarConf20)
Annual IEEE Radar Conference
The IEEE International Microwave Symposium (IMS) is the world s foremost conference covering the UHF, RF, wireless, microwave, millimeter-wave, terahertz, and optical frequencies; encompassing everything from basic technologies to components to systems including the latest RFIC, MIC, MEMS and filter technologies, advances in CAD, modeling, EM simulation and more. The IMS includes technical and interactive sessions, exhibits, student competitions, panels, workshops, tutorials, and networking events.
The IEEE Aerospace and Electronic Systems Magazine publishes articles concerned with the various aspects of systems for space, air, ocean, or ground environments.
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.
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.
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
Educational methods, technology, and programs; history of technology; impact of evolving research on education.
IEEE Conference Record - Abstracts. 1991 IEEE International Conference on Plasma Science, 1991
The 33rd IEEE International Conference on Plasma Science, 2006. ICOPS 2006. IEEE Conference Record - Abstracts., 2006
Summary form only given. The light-matter interactions are classified in two sets: the quantified interactions in which matter performs transitions between stationary states, and the parametric interactions for which matter excited by the light returns to its initial stationary state after the interaction. Strong parametric interactions require a space-coherence of the light beams, that is the same phase between each ...
2007 IEEE Antennas and Propagation Society International Symposium, 2007
This paper addresses the problem of tracking evaporation ducts in marine environments. The method tracks the evolution of the range and height- dependent index of refraction using the radar sea clutter. A split-step fast Fourier transform (FFT) based parabolic equation (PE) approximation to the wave equation is used to compute the clutter return in complex environments with varying index of ...
Proceedings of 2002 4th International Conference on Transparent Optical Networks (IEEE Cat. No.02EX551), 2002
In the quasi-optical aberration-free approximation, a parabolic equation for the envelope of an electromagnetic wave packet propagating along the geometric optical ray in a smoothly inhomogeneous isotropic medium with time dispersion is obtained. The effects of the combined influence of the refraction, diffraction, and dispersion on the evolution of the packet are analyzed; in particular, the effects that cause the ...
1963 Antennas and Propagation Society International Symposium, 1963
IMS 2012 Microapps - Practical Electromagnetic Modeling of Parallel Plate Capacitors at High Frequency
IMS 2011 Microapps - Quickwave Electromagnetic Software with CAD Input and GPU Processing
IMS 2012 Microapps - Fully Integrating 3D Electromagnetic (EM) Simulation into Circuit Simulation
Penetrating Conductors - EMC Society Demo
Founders War Stories
IMS 2015: Evolution of Maxwells Theory of Electromagnetism
Unique Fixtures for Characterizing Electromagnetic Properties of Materials at THz Frequencies: MicroApps 2015 - Keysight Technologies
IEEE Richard M. Emberson Award - Donald N. Heirman - 2018 IEEE Honors Ceremony
IEEE EMC Society Experiments
Grounding for Hybrid Vehicles
The Next G: What does 5G mean for Critical Communications and Electromagnetic Spectrum Dominance? - Manuel Uhm - 5G Technologies for Tactical and First Responder Networks 2018
IEEE Magnetics Distinguished Lecture - Mitsuteru Inoue
Dorothy, we're not in Kansas anymore, we are in Impedance Land. Oh my! EMC Webinar
ASC-2014 SQUIDs 50th Anniversary: 3 of 6 - Bob Fagaly
2013 IEEE Medal in Power Engineering
Silicon THz: an Opportunity for Innovation
Artificial Retinas give Second Sight - LSGC - Gianluca Lazzi
Radiated Emissions as Function of Common Mode Current - EMC Society Demo
ISEC 2013 Special Gordon Donaldson Session: Remembering Gordon Donaldson - 6 of 7 - A high sensitive magnetometer system for natural magnetic field measurements
Summary form only given. The light-matter interactions are classified in two sets: the quantified interactions in which matter performs transitions between stationary states, and the parametric interactions for which matter excited by the light returns to its initial stationary state after the interaction. Strong parametric interactions require a space-coherence of the light beams, that is the same phase between each wave and molecular dipole of same frequency at each implied molecule. With different frequencies producing generally different wavelengths, it is difficult to get the space-coherence. Therefore, except for refraction, the observation of parametric interactions requires particular conditions. Parametric interactions allowing frequency multiplications, combinations, shifts, etc often use two indices of refraction of crystals. G. L. Lamb Jr. (Rev. Mod. Phys., 43 , 99 (1971)) describes another general trick allowing parametric interactions: the use of "ultrashort light pulses" defined as "shorter than all relevant time constants". Thus, the qualifying "ultrashort", generally bound to femtosecond light pulses, applies NOT to the light only but to the set of the light and the refracting medium. Therefore, ordinary light whose coherence time is some nanoseconds is made of ultrashort pulses when it propagates in low pressure gases having a Raman resonance of the order of 100 MHz. Unhappily it is difficult to find a gas having so low a Raman frequency in a well populated state. Among common gases, only neutral atomic hydrogen in states 2S and (or) 2P (say H*) works well. Refraction and most parametric effects work without threshold of energy: the experiments show that the weakest light beam excites transitorily all molecules of a big prism, making a global non-stationary state, enough for a regular refraction. A frequency shifting interaction may be considered as produced by an interaction between several non-stationary states produced by the refraction of the corresponding electromagnetic beams; as these non- stationary states have the same symmetry, they interact through Raman type resonances. Thus, the effect is named "space-coherent Raman effect on time- incoherent light" (CREIL). An efficient interaction requires an increase of the entropy of the system, that is a flood of energy from modes having a high temperature (deduced from Planck's law) to colder modes. Consequently, the light is generally redshifted while the radio, thermal radiations are blueshifted. The frequency shifts, produced by thermodynamically allowed transfers of energy "catalyzed" by a refraction in H*, may be confused with Doppler shifts, the relative frequency shifts being constants if the dispersion of the polarisability of the gas is neglected. Usually, the blueshift of the radio frequencies is not detected, so that only the redshift of light is considered
This paper addresses the problem of tracking evaporation ducts in marine environments. The method tracks the evolution of the range and height- dependent index of refraction using the radar sea clutter. A split-step fast Fourier transform (FFT) based parabolic equation (PE) approximation to the wave equation is used to compute the clutter return in complex environments with varying index of refraction. Tracking is obtained using an extended Kalman filter (EKF).
In the quasi-optical aberration-free approximation, a parabolic equation for the envelope of an electromagnetic wave packet propagating along the geometric optical ray in a smoothly inhomogeneous isotropic medium with time dispersion is obtained. The effects of the combined influence of the refraction, diffraction, and dispersion on the evolution of the packet are analyzed; in particular, the effects that cause the precession of the envelope waves about the binormal to the propagation trajectory are considered.
The study of electromagnetic transmission through a metallic plate with apertures has been investigated for a long time. However, it is one of the important current issues in optics. The small aperture of a metal-coated probe makes possible high resolution beyond the refraction limit (Ohtsu, M. and Hori, H., "Near-field Nano-optics: From Basic Principles to Nano-Fabrication and Nano-Photonics", Kluwer Academic Plenum Publishers, 1999). The extraordinary enhancement of the optical transmission through subwavelength apertures in metal films has been observed (Ebbesen, T.W. et al., Nature, vol.391, p.667-9, 1998). We perform computer simulations of the electromagnetic transmission through a perfectly conducting plate, which has infinite area, with subwavelength apertures. The surface integral equation method is employed to perform the computer simulation. The apertures which are parallel to the incident electric field have more influence on the field distributions than the apertures which are perpendicular to the incident electric field.
This paper investigates the focusing of the backscattered microwave by using a flat left-handed materials (LHM) lens. Results show that the use of flat LHM lens does significantly increase the intensity of the backscattered microwave from the target. As such, microwave target detection and imaging with flat LHM lens can be highly desired with sub-wavelength resolution. For practical LHM lens, the imaging resolution would be worse than that in the simulation, somewhat like the case shown an experiment wherein the sub-wavelength imaging resolution for future systems with flat LHM lens can also be desired
In this paper, based on peculiar electromagnetic characteristics of metamaterials, peculiar radar cross section properties of metamaterials with zero index of refraction are discussed. These results provide some interested insights for potential applications in radar.
Metamaterials are new artificial materials with unusual electromagnetic properties that are not found in naturally occurring materials. All "natural" materials such as glass, diamond and such have positive electrical permittivity, magnetic permeability and an index of refraction. In these new artificially fabricated materials - termed as negative index materials (NIM) or double negative (ONG) media or left handed (LH) materials or backward wave (BW) media - all these material parameters are negative. With these unusual material parameters, new kinds of miniaturized antennas and microwave components/devices can be created for the wireless communications and the defense industries. The electrical permittivity and the magnetic permeability are the main determinants of a material's response to electromagnetic (EM) waves. In metamaterials, both these material parameters are negative. Correspondingly, the refractive index of the metamaterials is also negative. Another strange property of metamaterials is its reverse Doppler effect.
The evolution of the wave statistical characteristics in a magnetised collisional turbulent plasma is investigated by means of calculations of the wave intensity angular moments on the basis of the radiative transfer equation. This approach allows us to describe distortions of the angular spectrum caused both by multiple scattering and absorption.
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