Electromagnetic waves
-
The specific phase and group refractive indexes concerning the specific phase and group velocities of single and packet electromagnetic waves contain all interactions between the electromagnetic waves and the propagating medium
9p viaespa2711 31-07-2021 17 2 Download
-
Lecture Physics A2: Electromagnetic Field and Wave - PhD. Pham Tan Thi present the content Maxwell’s equation, Gauss’s law for electric field, Faraday’s law, Ampère’s law with Maxwell’s correction, convert intergral form to differential form,...
27p xusong 21-07-2021 15 1 Download
-
Lecture Physics A2: Quantum Nature of Light (Quantum Optics) - PhD. Pham Tan Thi present the content wave characteristics, electrically charged particles and electromagnetic waves, effect on electric charges, accelerated charges (electrons, protons) produce,...
31p xusong 21-07-2021 14 1 Download
-
The analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by confined electrons in the presence of laser radiation modulated by amplitude in doped superlattices (DSL) are obtained by using the quantum kinetic equation for electrons in the case of electron–optical phonon scattering.
11p tamynhan8 04-11-2020 16 2 Download
-
5G antenna is so compact size but has to get large bandwidth, high gain and good radiation efficiency to be able to support huge data rate for 4.0 revolution industry. In this paper, a novel 4x4 multiband Multiple Input Multiple Output (MIMO) antenna is designed. Using the semi-circle structure, the proposed antenna not only achieves wide band but also is easy to optimize operate frequencies at millimeter wave band.
8p vitunis2711 11-12-2019 31 3 Download
-
Purposes of the thesis: Propose physical mechanism to investigate metamaterial absorber operating in THz region. Design, simulation, and characterizations of MA in THz region. Optimize parameter structure to increase absorption and broaden operating wavelength region, modify operating wavelength by external factors.
27p xacxuoc4321 09-07-2019 30 4 Download
-
The theoretical results for the EC are numerically evaluated, plotted and discussed for a specific RQWIP GaAs/GaAsAL. We also compared received EC with those for normal bulk semiconductors and quamtum wells to show the difference. The Ettingshausen effect in a RQWIP in the presence of an EMW is newly developed.
7p truongtien_09 08-04-2018 27 1 Download
-
Introduction waves and phasors, transmission lines, vector analysis, electrostatics, magnetostatics, maxwell’s equations for time-varying fields, plane-wave propagation, wave reflection and transmission,... As the main contents of the document "Fundamentals of Applied Electromagnetics 6e by Fawwaz T. Ulaby, Eric Michielssen, and Umberto Ravaioli". Invite you to consult.
290p luutrutailieu112 11-12-2015 95 8 Download
-
Hấp thụ phi tuyến của một sóng điện từ mạnh mẽ gây ra bởi các electron bị giới hạn trong các dây lượng tử hình trụ là lý thuyết nghiên cứu bằng cách sử dụng phương trình động lực học lượng tử cho các electron.
6p phalinh20 24-08-2011 74 5 Download
-
THE AMPLITUDE MODULATED RADIO RECEIVER The electromagnetic disturbance created by the transmitter is propagated by the transmitter antenna and travels at the speed of light as described in Chapter 2. It is evident that, if the electromagnetic wave encounters a conductor, a current will be induced in the conductor. How much current is induced will depend on the strength of the electromagnetic field, the size and shape of the conductor and its orientation to the direction of propagation of the wave....
32p tienvovan 11-09-2010 91 14 Download
-
Spheroidal wave functions are special functions in mathematical physics which have found many important and practical applications in science and engineering where the prolate or the oblate spheroidal coordinate system is used. In the evaluation of electromagnetic (EM) fields in spheroidal structures, spheroidal wave functions are frequently encountered, especially when boundary value problems in spheroidal structures are solved using full-wave analysis.
11p tienvovan 11-09-2010 78 8 Download
-
It has been known from the previous chapter that light, and in general, electromagnetic waves have particle behavior. Some latter time than the quantum theory of light, it was discovered that particles show also wavelike behavior. The wave-particle duality of matter is the fundamental concept of modern physics Newton’s classical physics should be replaced by the new mechanics which is able to describe the wave nature of particles
34p thanhan 22-07-2009 171 18 Download
-
Interference and diffraction of light are arguments for wave charactiristics of light. We know that there are two types of wave processes: transverse & longitutional waves →to what are light waves belong ? Study of polarization of light makes clear that This conclusion is in according to the concept that light waves are electromagnetic waves with a definte band of frequencies. Recall that electromagnetic waves are transervse waves in which e-vectors & m-vectors oscillate in such follwing directions...
20p thanhan 22-07-2009 164 13 Download
-
We have known the close connection between changing eletric fields and magnetic fields. They can create each other and form a system of electromagnetic fields. Electromagnetic fields can propagate in the space (vacuum or material environment). We call them electromagnetic waves. They play a very important role in science and technology.
49p thanhan 22-07-2009 139 21 Download