The electromagnetic field emitted by a pulsed current point source above the interface of a nonperfectly conducting Earth

Radio Science ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 1345-1360 ◽  
Author(s):  
B. J. Kooij
Keyword(s):  
Electromagnetic Field ◽  
Point Source ◽  
Pulsed Current ◽  
Current Point

scholarly journals Three-Dimensional Numerical Visualization And Simulation of Multiphysics in Point Source Dc Magnetometric Resistivity Method

2020 ◽  
Author(s):  
Wenlong Gao ◽  
Lei Zhou ◽  
Liangjun Yan
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Point Source ◽  
Three Dimensional ◽  
Theoretical Method ◽  
Potential Method ◽  
Resistivity Method ◽  
Physics Simulation ◽  
Visualization And Simulation ◽  
Numerical Calculation Method

Magnetometric Resistivity(MMR) Method, which can use the power supply method of the traditional apparent resistivity method to measure the magnetic field. At present, the application research abroad is relatively extensive, but the domestic(China) research on the application of the MMR method is very few, and it is not even well-known. This paper is based on the MMR theoretical method under the point source DC condition, combined with the abnormal potential method and the modified Biot-Savart law, and using the three-dimensional numerical calculation method of the finite difference method to calculate the abnormal potential field, electric field, and magnetic field on the matlab2018a platform. Calculate, realize the multi-physics simulation in the electromagnetic field through Matlab platform programming, and verify the correctness of the algorithm by the spherical anomaly model with an analytical solution. Through the visual simulation of the three-dimensional data volume of the multi-physics field in the electromagnetic field, we can better understand the response mechanism of the electromagnetic field under DC conditions and grasp their three-dimensional spatial distribution rules. It is hoped that the research in this article can help the research of MMR Personnel better use this method for exploration.

Height and Angle Characteristics of Point Source Transmitting Power of Wireless Avionics Intra-Communication Systems Based on FDTD Analysis

2021 ◽  
Vol 35 (11) ◽  
pp. 1274-1275
Author(s):  
Shunichi Futatsumori ◽  
Kazuyuki Morioka ◽  
Takashi Hikage ◽  
Tetsuya Sekiguchi ◽  
Manabu Yamamoto ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Field Strength ◽  
Electric Field ◽  
Point Source ◽  
Communication Systems ◽  
Large Scale ◽  
Three Dimensional ◽  
Dimensional Model ◽  
Three Dimensional Model ◽  
Radiated Power

The equivalent isotopically radiated power (EIRP) of a wireless avionics intra-communication (WAIC) system is limited to 6 dBm/MHz at the geometrical center of the aircraft, to avoid interference with aircraft radio altimeters, which are operated at the same frequency band between 4,200–4,400 MHz. In this paper, the height and angle characteristics of the point source EIRP of a WAIC system are analyzed based on the large scale FDTD analysis. Firstly, the strength of the electric field (E-field) around the three-dimensional model of Airbus A320-200 is analyzed. Then, the point source EIRP is calculated based on the analyzed E-field strength. Finally, the height and angle characteristics are analyzed to estimate the electromagnetic field characteristics of the aircraft.

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