scholarly journals High-Density Signal Interface Electromagnetic Radiation Prediction for Electromagnetic Compatibility Evaluation.

2017 ◽  
Author(s):  
Matthew Halligan
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Compatibility ◽  
High Density ◽  
Signal Interface

Gradient structures of Ni – Zn ferrites for electromagnetic radiation protection devices

2021 ◽  
Vol 5 ◽  
pp. 39-46
Author(s):  
V. V. Karanskij ◽  
◽  
S. V. Smirnov ◽  
A. S. Klimov ◽  
E. V. Savruk ◽  
...  
Keyword(s):  
Electron Beam ◽  
Electromagnetic Radiation ◽  
Radiation Protection ◽  
Electromagnetic Compatibility ◽  
Protective Coatings ◽  
Frequency Range ◽  
Near Surface ◽  
Zn Ferrite ◽  
Absorbing Materials ◽  
Plasma Electronic

Increasing the reliability requirements for electromagnetic compatibility of electronic equipment requires the creation of protective coatings that absorb electromagnetic radiation or the development of new radio-absorbing materials. In the frequency range up to 1 GHz, radio-absorbing materials based on Ni – Zn ferrites are of the greatest interest. The absorption of electromagnetic radiation by ferrites occurs due to resonant phenomena at the level of domains and atoms. Improving the performance of ferrites is possible by modifying their surface properties. In this paper, gradient structures for electromagnetic radiation protection products are obtained by treating the surface of Ni – Zn ferrite samples with a low-energy electron beam. To generate the electron beam, a unique development was used — a forevacuum plasma electronic source that allows forming and transporting a beam with a power density of up to 105 W/cm2 under conditions of high pressure and high gas release. As a result of processing, gradient structures were found on the surface of ferrites. A theoretical analysis and experimental study of the obtained structures “non – magnetic conductor – ferrite”, characterized by an increased attenuation coefficient and a reduced reflection coefficient of electromagnetic radiation in the frequency range from 0.5 to 2.5 GHz. The possibility of obtaining near-surface layers depleted in zinc with increased electrical conductivity and reduced magnetic permeability is shown.

Experimental researches of the characteristics of antennas in the presence of electromagnetic screens

2021 ◽  
Author(s):  
A.V. Shlyahov
Keyword(s):  
Electromagnetic Radiation ◽  
Electromagnetic Compatibility ◽  
Confined Space ◽  
Electromagnetic Environment ◽  
Innovative Technologies ◽  
Limited Application ◽  
Interference Frequency ◽  
Spaced Antennas ◽  
Experimental Researches ◽  
Antenna Systems

When placing various antenna systems in a confined space, one has to deal with a complex electromagnetic environment and insufficient isolation between the antennas. And, although the methods of ensuring electromagnetic compatibility of such groups of radio electronic means are well known, taking into account the peculiarities of the objects under consideration, they have very limited application. The use of innovative technologies developing in recent years, including the use of screens made of metamaterials, makes it possible to significantly expand the "limits of applicability" of these methods. As the studies have shown, the screen made of metamaterial has special characteristics in comparison with traditional screens, namely: at the operating frequency of the antenna, the screen is practically permeable to electromagnetic radiation, and at the interference frequency it becomes low-transparent and works as a reflector. The results can be used to improve isolation between closely spaced antennas, such as at the tops of towers or masts.

scholarly journals Electromagnetic radiation shielding composite coatings based on powdered alumina and ironoxide

Doklady BGUIR ◽  
2021 ◽  
Vol 19 (3) ◽  
pp. 104-109
Author(s):  
D. I. Penialosa Ovalies ◽  
O. V. Boiprav ◽  
M. V. Tumilovich ◽  
L. M. Lynkou
Keyword(s):  
Iron Oxide ◽  
Electromagnetic Radiation ◽  
Electromagnetic Compatibility ◽  
Composite Coatings ◽  
Radiation Shielding ◽  
Frequency Range ◽  
Reflection And Transmission ◽  
Powdered Iron ◽  
Transmission Coefficients ◽  
Experimental Substantiation

The  article  presents  the  results  of  experimental  substantiation  of  the  method  for  improving the shielding  properties  of  composite  coatings  based  on  powdered  alumina  (electrocorundum,  alum  earth), which  consists  in  modifying  the  composition  of  such  coatings  by adding  to  it  powdered  iron  oxide. This experimental substantiation consisted in the development of the technique for obtaining composite coatings based on powdered alumina and iron oxide, the manufacture of the experimental samplesusing the developed technique,  measurements  of  electromagnetic  radiation  reflection and  transmission  coefficients  values in the frequency range 0.7…17.0 GHz of the manufactured samples; implementation of the comparative analysis of the measured values with the similar values typical for the composite coatings filled with powdered alumina oxides, and composite coatings with the fillers such as powdered iron oxide. The obtained results revealed that by  adding  powdered  iron  oxide  to  the  composite  coatings  based  on powdered  alumina  oxides,  it  is  possible to reduce by 1.0…8.0 dB their electromagnetic radiation transmission coefficient values in the frequency range 0.7…17.0 GHz. In addition, we found that the implementation of the proposed method allows one to decrease by  2.0…20.0  dB  the  electromagnetic  radiation  reflection  coefficient  values  in  the  specified  frequency  range of the considered composite coatings, if such are applied to metal substrates. We propose to use the composite coatings, obtained on the base of the substantiated method, in order to ensure the electromagnetic compatibility of radio-electronic equipment.

scholarly journals Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

2021 ◽  
Author(s):  
Yuanbo Cui ◽  
Deren Kong ◽  
Jian Jiang ◽  
Shang Gao ◽  
Shuai Wang
Keyword(s):  
Data Analysis ◽  
Electromagnetic Radiation ◽  
Time Domain ◽  
Electromagnetic Compatibility ◽  
Electronic Equipment ◽  
Radiation Measurement ◽  
Rocket Fuel ◽  
Radiation Characteristics ◽  
Characterization Model ◽  
Energy Domain

During the launch and return of a spacecraft, the intense combustion of propellants generates strong electromagnetic radiation, which interferes with the operation of electronic equipment in the spacecraft. To improve the electromagnetic compatibility of electronic equipment in spacecraft, it is necessary to study the electromagnetic radiation characteristics of rocket fuel. An electromagnetic radiation measurement system based on antennas is designed to measure the electromagnetic radiation generated by rocket fuel, and the electromagnetic radiation characteristics are obtained through data analysis. The mechanism of the electromagnetic radiation generated by rocket fuel is comprehensively analysed through the spatial, time-domain, frequency-domain, and energy-domain characteristics. A characterization model is established to provide a reliable scheme for evaluating the influence of rocket fuel electromagnetic radiation on electronic equipment in spacecraft.

scholarly journals Study on Electromagnetic Radiation Interference Caused by Rocket Fuel

2021 ◽  
Author(s):  
Yuanbo Cui ◽  
Deren Kong ◽  
Jian Jiang ◽  
Shang Gao ◽  
Shuai Wang
Keyword(s):  
Data Analysis ◽  
Electromagnetic Radiation ◽  
Time Domain ◽  
Electromagnetic Compatibility ◽  
Electronic Equipment ◽  
Radiation Measurement ◽  
Rocket Fuel ◽  
Radiation Characteristics ◽  
Characterization Model ◽  
Energy Domain

Abstract During the launch and return of a spacecraft, the intense combustion of propellants generates strong electromagnetic radiation, which interferes with the operation of electronic equipment in the spacecraft. To improve the electromagnetic compatibility of electronic equipment in spacecraft, it is necessary to study the electromagnetic radiation characteristics of rocket fuel. An electromagnetic radiation measurement system based on antennas is designed to measure the electromagnetic radiation generated by rocket fuel, and the electromagnetic radiation characteristics are obtained through data analysis. The mechanism of the electromagnetic radiation generated by rocket fuel is comprehensively analysed through the spatial, time-domain, frequency-domain, and energy-domain characteristics. A characterization model is established to provide a reliable scheme for evaluating the influence of rocket fuel electromagnetic radiation on electronic equipment in spacecraft.

Based on the LabVIEW Electrified Railway Signal Acquisition and Processing System of Electromagnetic Radiation

2013 ◽  
Vol 457-458 ◽  
pp. 1249-1252
Author(s):  
Yao Dan Chi ◽  
Yu Song Mu ◽  
Hai Long Gu
Keyword(s):  
Electromagnetic Radiation ◽  
Virtual Instrument ◽  
Electromagnetic Compatibility ◽  
Rapid Development ◽  
Processing System ◽  
Signal Acquisition ◽  
Development Environment ◽  
Railway Signal ◽  
Electrified Railway ◽  
Embedded Development

Electrified railway got rapid development in recent years, increasingly highlights its electromagnetic compatibility problems. In this paper, on the basis of predecessors' research results, the virtual instrument technology is applied to the electromagnetic radiation of electrified railway signal measurement, complete embedded processing equipment design, make its have the electromagnetic radiation on the railway signal detection, acquisition and processing functions. Based on LabVIEW embedded development environment configuration and Windows CE operating system builds and transplantation, realize the man-machine interface easy to operate and flexible signal processing algorithms.

Electromagnetic Radiation Resulting From PCB/High-Density Connector Interfaces

2013 ◽  
Vol 55 (4) ◽  
pp. 614-623 ◽  
Author(s):  
Bruce Archambeault ◽  
Sam Connor ◽  
Matthew S. Halligan ◽  
James L. Drewniak ◽  
Albert E. Ruehli
Keyword(s):  
Electromagnetic Radiation ◽  
High Density
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