scholarly journals Theory of electromagnetic wave frequency upconversion in dynamic media

2018 ◽  
Vol 98 (2) ◽  
Author(s):  
Kenan Qu ◽  
Qing Jia ◽  
Matthew R. Edwards ◽  
Nathaniel J. Fisch
Keyword(s):  
Electromagnetic Wave ◽  
Wave Frequency ◽  
Frequency Upconversion

Terahertz wave frequency upconversion by rapid plasma creation

2013 ◽  
Author(s):  
N. Yugami ◽  
T. Otsuka ◽  
Y. Sentoku ◽  
A. Nishida ◽  
R. Kodama
Keyword(s):  
Terahertz Wave ◽  
Wave Frequency ◽  
Frequency Upconversion

scholarly journals 355 Effect of electromagnetic wave frequency on plasma generation inside narrow metal tube by MVP method

2009 ◽  
Vol 2009.58 (0) ◽  
pp. 195-196
Author(s):  
S. Kadowaki ◽  
H. Kousaka ◽  
N. Umehara ◽  
A. Kondo ◽  
N. Tamura ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Wave Frequency ◽  
Metal Tube ◽  
Plasma Generation

A new study on the influencing factors and mechanism of shielding effectiveness of woven fabrics containing stainless steel fibers

2019 ◽  
Vol 50 (6) ◽  
pp. 830-846
Author(s):  
Yalan Yang ◽  
Jianping Wang ◽  
Zhe Liu ◽  
Zhujun Wang
Keyword(s):  
Stainless Steel ◽  
Electromagnetic Wave ◽  
Electromagnetic Radiation ◽  
Woven Fabrics ◽  
Electromagnetic Shielding ◽  
Living Environment ◽  
Steel Fibers ◽  
Wave Frequency ◽  
Shielding Effectiveness ◽  
Electromagnetic Shielding Effectiveness

Electromagnetic radiation is becoming increasingly serious around our living environment, which seriously endangers people's health and interferes with the operation of electronic equipment. The research and development of anti-electromagnetic radiation fabric have drawn more and more attention. However, the influencing rules and mechanisms of conductive fiber content, fabric tightness, warp–weft density, conductive yarn arrangement, weave type, and electromagnetic wave frequency on fabric electromagnetic shielding effectiveness have not been clarified. Therefore, in this study, a series of fabrics containing stainless steel fibers were produced. Meanwhile, the influencing rules of various factors on electromagnetic shielding effectiveness and the quantitative relationship between some factors and electromagnetic shielding effectiveness were discussed. The results showed that all factors had different degrees of influence on electromagnetic shielding effectiveness, and the relationship between electromagnetic shielding effectiveness and electromagnetic wave frequency could be approximately expressed as: [Formula: see text]. At the same time, the influencing mechanisms of various factors on electromagnetic shielding effectiveness were analyzed in combination with fabric microstructure and macrostructure, the intrinsic parameters of the fabric and the electromagnetic shielding effectiveness mechanism. The results are expected to provide a reference for the establishment of electromagnetic shielding fabric model and enterprise production.

NONLINEAR DEMODULATION OF AN AMPLITUDE-MODULATED ELECTROMAGNETIC WAVE PROPAGATING IN A MAGNETOPLASMA

1967 ◽  
Vol 45 (12) ◽  
pp. 3991-4010 ◽  
Author(s):  
Sant Ram ◽  
P. K. Kaw
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Applied Magnetic Field ◽  
Free Space ◽  
Numerical Results ◽  
Electric Vector ◽  
Wave Frequency ◽  
Plasma Parameters ◽  
Explicit Expressions

Explicit expressions for the electric vector of an amplitude-modulated electromagnetic wave propagating along the direction of an applied magnetic field in a nonlinear ionized medium have been obtained, when the wave frequency is equal to the gyrofrequency of the electrons. It is seen that the wave gets strongly demodulated after propagation through the magnetoplasma as well as after reflection from a magnetoplasma-free space interface. Some numerical results, illustrating the variation of the demodulation with various plasma parameters have been presented in the discussion.

scholarly journals To the Question of the Independence of the Surface Electromagnetic Wave Frequency

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
V. K. Balkhanov ◽  
Yu B. Bashkuev
Keyword(s):  
Electromagnetic Wave ◽  
Layer Thickness ◽  
Dielectric Layer ◽  
Free Space ◽  
Electromagnetic Waves ◽  
Wave Frequency ◽  
Waveguide Channel ◽  
Surface Electromagnetic Wave ◽  
Minimum Frequency ◽  
Waveguide Theory

Earth's the surface is often strongly inductive, consisting of a dielectric layer thickness endpoint, lying on an unlimited conductor basis. Electromagnetic wave, spreading along the surface, it appears captured dielectric layer, spreading it as in the waveguide channel. Waveguide theory it is known that the spread in the waveguide can only electromagnetic waves with a discrete set of frequencies. And experience shows that the captured waveguide channel electromagnetic waves can be any frequency. The article found that this behavior is due to the fact that electromagnetic waves in free space border - dielectric layer damped height in several wavelengths. Thus the thickness of the dielectric layer becomes more effectively, and this leads to a reduction of the minimum frequency of the waveguide. A discrete set of frequencies is blurred so that cover each other. Thus, a discrete set of frequencies becomes solid, and captured waveguide channel electromagnetic waves are independent of frequency.

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