نتایج جستجو برای: de electromagnetic wave

تعداد نتایج: 1809345  

2009
Seiho Uratsuka Nobuhiro Takahashi Mamoru Ishii Kaoru Gotoh

in Greater Detail Development of High-Performance Aircraft Mounted Synthetic Aperture Radar Seiho Uratsuka . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 Development of Cloud Profiling ...

1997
Alexander A. Lisyansky

We consider propagation of coupled waves (polaritons) formed by a scalar electromagnetic wave and excitations of a finite one dimensional chain of dipoles. It is shown that a microscopic defect (an impurity dipole) embedded in the chain causes resonance tunneling of the electromagnetic wave with the frequency within the forbidden band between two polariton branches. We demonstrate that resonanc...

2009
Takahiro Aoyagi Kimitoshi Murano Atsuhiro Nishikata Youji Kotsuka

We propose novel RH-metamaterial structure of the Z-chip for improving the oblique incidence characteristics as an electromagnetic wave absorber. The basic characteristics of a wave absorber using a Z-chip is calculated by FDTD simulation at an oblique incidence. To demonstrate the efficiencies of the chip, a unit cell like a Z-chip was introduced to an actual computer controlled metamaterial e...

2017
M. M. Gajibo M. K. A. Rahim N. A. Murad

A metamaterial electromagnetic wave absorber consisting of a big circular ring patch with four smaller suppression circular rings is presented in this report. The metamaterial electromagnetic wave absorber introduces the concept of size reduction by suppressing the resonance frequency. An FR4 substrate was used and the incidental wave angles were varied from 0 0 to 60 0 . Simulations results sh...

1998
H. O. Ueda Y. Omura H. Matsumoto

Excitation of upper hybrid waves associated with the ionospheric heating experiments is assumed to be essential in explaining some of the features of stimulated electromagnetic emissions (SEE). A direct conversion process is proposed as an excitation mechanism of the upper hybrid waves where the energy of an obliquely propagating electromagnetic pump wave is converted into the electrostatic upp...

2001
António L. Topa Carlos R. Paiva Afonso M. Barbosa

This paper treats electromagnetic wave propagation in anisotropic, chiral and pseudochiral 3D structures. The analysis is focused on radiation and leakage behavior and includes a discussion of the effect of the media parameters on the electromagnetic characteristics of these structures.

2017

Submit Manuscript | http://medcraveonline.com Abbreviations: EMFs: Electromagnetic Fields; MWR: Microwave Radiation; NIR: Non-Ionizing Radiation; RF-EMW: Radiofrequency Electromagnetic Waves; RF: Radiofrequency; EMW: Electromagnetic Wave; SNS: Sympathetic Nervous System; PNS: Parasympathetic Nervous System; PRA: Plasma Renin Activity; AMI: Acute Myocardial Infarction; SNAP: N-AcetylSnitrosoDl-P...

2002
M. Walt H. D. Voss J. Pickett

[1] On 15 October 1999, charged particle and plasma wave detectors on the Polar satellite observed an enhancement in precipitating energetic electrons coincident with an ELF/VLF electromagnetic emission. Assuming that the electromagnetic wave was field aligned and scattered trapped electrons by first-order cyclotron resonance near the equatorial plane, the resulting pitch angle distribution of ...

2008
Romi Mankin Tõnu Laas Risto Tammelo

We present an alternative method for constructing the exact and approximate solutions of electromagnetic wave equations whose source terms are arbitrary order multipoles on a curved spacetime. The developed method is based on the higher-order Green’s functions for wave equations which are defined as distributions that satisfy wave equations with the corresponding order covariant derivatives of ...

2017
Hanwei Wang Qiufang Yao Chao Wang Zhongqing Ma Qingfeng Sun Bitao Fan Chunde Jin Yipeng Chen

In this study, nanooctahedra MnFe₂O₄ were successfully deposited on a wood surface via a low hydrothermal treatment by hydrogen bonding interactions. As-prepared MnFe₂O₄/wood composite (MW) had superior performance of soft magnetism, fire resistance and electromagnetic wave absorption. Among them, small hysteresis loops and low coercivity (<±5 Oe) were observed in the magnetization-field curve ...

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