scholarly journals Mapping of Electromagnetic Field for Across the Center of Manisa and Evaluation of Measurement Results / Manisa Merkezi Elektromanyetik Alan Haritasının Çıkartılması ve Ölçüm Sonuçlarının Değerlendirilmesi

2016 ◽  
Vol 12 (1) ◽  
Author(s):  
Raşit Ata ◽  
Oğuzkaan Deligöz ◽  
Enes Arıkan
2013 ◽  
Vol 58 (3) ◽  
pp. 919-922 ◽  
Author(s):  
K. Granat ◽  
B. Opyd ◽  
D. Nowak ◽  
M. Stachowicz ◽  
G. Jaworski

Abstract The paper describes preliminary examinations on establishing usefulness criteria of foundry tooling materials in the microwave heating technology. Presented are measurement results of permittivity and loss tangent that determine behaviour of the materials in electromagnetic field. The measurements were carried-out in a waveguide resonant cavity that permits precise determination the above-mentioned parameters by perturbation technique. Examined were five different materials designed for use in foundry tooling. Determined was the loss factor that permits evaluating usefulness of materials in microwave heating technology. It was demonstrated that the selected plastics meet the basic criterion that is transparency for electromagnetic radiation.


Author(s):  
G. V. Kozlov ◽  
S. P. Lebedev

The paper investigates the influence of the electromagnetic field and standing wave structure in a quasi-optical waveguide on the dielectric measurement results and gives recommendations on the layout of measuring circuits.


Open Physics ◽  
2019 ◽  
Vol 17 (1) ◽  
pp. 352-357
Author(s):  
Piotr Lipinski ◽  
Marcin Leplawy

Abstract The aim of this paper is to develop simplified model for WiFi electromagnetic field propagation. The model can be used in preliminary estimation of WiFi transmitter localization for the purpose of WiFi-based indoor localization. It can be particularly useful when designing structural networks.We have developed a simplified linear model of WiFi electromagnetic field modelling and compared it with the most commonly used, more sophisticated models and with measurement results which were carried out in the laboratory. As demonstrated by the results of measurements conducted using various hardware, the accuracy of this simplified model introduced is similar to the commonly used models, but the number of parameters is lower. Therefore, our model easier to implement in real life conditions. The model presented in this paper enables WiFi electromagnetic field modelling when the exact values of propagation parameters and transmitter characteristics is unknown. This is usually the case at the early stage of structural network design,when exact parameters of building construction materials are not known. As the model is very simple, it does not require much effort to deploy, while its accuracy is sufficient for preliminary WiFi transmitter localization. Simplified models of WiFi electromagnetic field propagation are known, but no comparative research combined with measurements has been done in this field. This paper provides a comparison of different electromagnetic field models which can be applied to WiFi electromagnetic field propagation together with measurement results.


2019 ◽  
Vol 34 (06) ◽  
pp. 1100-1103
Author(s):  
Bojan Lungulov ◽  
Vladimir Rajs ◽  
Vladimir Milosavljević

In this paper the implementation of the device for wireless communication detection is presented. The system measures RF electromagnetic field strength for frequencies from 1 MHz up to 10 GHz and has wide range of adjustable sensitivity. Implemented device provides detection of cellular phone activities in all three main operating bands, and detection of other types of wireless communication such as radio communications, Bluetooth, Wi-Fi and so on. The device presents an improvement of a previous version of the detector UD-100. Measurement results are displayed on graphical display providing easy user readings and device operating. Device is operated by four touch sensitive keypads, the system is battery powered, portable and can fit in any pocket.


2020 ◽  
Vol 64 (187) ◽  
pp. 109-116
Author(s):  
Andrzej Miszkiewicz ◽  
Krzysztof Tchórzewski

The article discusses the issue of electromagnetic field levels emitted from rail vehicles with regard to civil protection. The article presents the lack of legal solutions, limits and research methods in the railway industry in Poland. It also depicts the initial results of measurements from rail vehicles. Based on the findings, taking into consideration the measurement results and suppression of electromagnetic waves in free space, electromagnetic fields may reach substantial levels which can affect people’s health and life. The authors of the article conclude that the problem should not be ignored and requires further research, bearing in mind the progressing saturation of all rail vehicles with devices and electronic systems which will serve as sources of electromagnetic fields. Keywords: electromagnetic fields, civil protection, measurements


Author(s):  
I. V. Bochkarev ◽  
I. V. Bryakin

A new method for diagnosing power and switching electromagnetic mechanisms containing a control electromagnet and a movable armature is proposed. The movable element of the diagnosed electromagnetic mechanism (EMM) is irradiated with a high-frequency probing electromagnetic field and the reradiated electromagnetic field from it is recorded. The source of the probing field and the receiver of the re-radiated field is the EMM electromagnet winding. The probing electromagnetic field is formed by imposing on the low-frequency high-voltage operating voltage of the supply winding of the electromagnet EMM an additional high-frequency low-voltage voltage. The diagnostic parameter is determined by algorithmic processing of the measurement results of the magnitude of the voltage increment on the EMM winding, caused by exposure to a reradiated electromagnetic field, and the technical condition of the diagnosed electromagnetic mechanism is determined by the absolute value of the di-agnostic parameter. The method allows to diagnose the current state of the main functional units of the EMM and to control its operating modes as a whole.


2019 ◽  
Vol 68 (2) ◽  
pp. 177-187
Author(s):  
Kamil Białek ◽  
Jacek Paś

The parameter of interfering signals, determining the type of coupling, is the disturbing frequency. For frequencies less than 30 MHz, main impact comes by conducted emissions. The article presents an analysis of the occurrence of disturbances and the impact of the load of the selected railway equipment’s on the measurement result of the conducted disturbances. Keywords: electromagnetic field, spectrum, interference, induction and capacitive coupling


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