Antenna and measurement improvements based on equivalent currents reconstruction

2019 ◽  
pp. 45-90
Author(s):  
Maria Alberica Saporetti ◽  
Andrea Giacomini ◽  
Francesco Saccardi ◽  
Lars J. Foged
Keyword(s):  
Equivalent Currents

scholarly journals Fast Power Density Assessment of 5G Mobile Handset Using Equivalent Currents Method

2021 ◽  
pp. 1-1
Author(s):  
Wang He ◽  
Bo Xu ◽  
Lucia Scialacqua ◽  
Zhinong Ying ◽  
Alessandro Scannavini ◽  
...  
Keyword(s):  
Power Density ◽  
Fast Power ◽  
Mobile Handset ◽  
Density Assessment ◽  
Equivalent Currents

scholarly journals Climatology of rapid geomagnetic variations at high latitudes over two solar cycles

2011 ◽  
Vol 29 (10) ◽  
pp. 1783-1792 ◽  
Author(s):  
A. Viljanen ◽  
E. Tanskanen
Keyword(s):  
Maximum Amplitude ◽  
Early Morning ◽  
Clear Correlation ◽  
High Latitudes ◽  
Solar Cycles ◽  
Horizontal Magnetic Field ◽  
Geomagnetic Variations ◽  
Early Afternoon ◽  
Magnetometer Data ◽  
Equivalent Currents

Abstract. We investigate the characteristics of rapid geomagnetic variations at high latitudes based on the occurrence of large time derivatives of the horizontal magnetic field (dH/dt exceeding 1 nT s−1). Analysis of IMAGE magnetometer data from North Europe in 1983–2010, covering more than two solar cycles, confirms and specifies several previous findings. We show that dH/dt activity is high around the midnight and early morning hours, and nearly vanishes at noon and early afternoon. This happens during all seasons, although the midnight maximum is nearly invisible during summer. As indicated by modelled ionospheric equivalent currents, large dH/dt values occur predominantly during westward ionospheric electrojets. Before and around midnight, dH/dt tends to be north-south oriented, whereas in the morning hours, its direction is more west-east directed. dH/dt tends to be more strictly north-south oriented during winter than other seasons. The seasonal occurrence of large dH/dt values is similar to the variation of the maximum amplitude of westward equivalent currents. The yearly fraction of east-west directed large dH/dt vectors at the Kilpisjärvi station (MLAT 65.88) varies from 31 to 47 % without any clear correlation with the general geomagnetic activity nor with the yearly averages of solar wind parameters.

scholarly journals Магнитостатическая энергия доменных стенок в одноосных пленках конечных размеров

2019 ◽  
Vol 61 (10) ◽  
pp. 1767
Author(s):  
П.М. Ветошко ◽  
Ф.П. Ветошко ◽  
В.Г. Шавров ◽  
В.И. Щеглов
Keyword(s):  
Domain Walls ◽  
Magnetic Sensors ◽  
Magnetization Distribution ◽  
Magnetic Memory ◽  
Spintronic Devices ◽  
Domain Structures ◽  
Magnetic Elements ◽  
Uniform Magnetization ◽  
Equilibrium Configurations ◽  
Equivalent Currents

AbstractThe solution to the problem of calculating the magnetostatic interaction energy of domain walls in uniaxial magnetics with a uniform magnetization distribution inside the domains is given. In carrying out the calculations, the principle of equivalent currents is used, assuming a uniform distribution of magnetization and its representation by equivalent currents flowing along the domain walls and along the surface. Analytical expressions for the mutual induction of two rectangular conductors with an arbitrary aspect ratio have been obtained. Results may be helpful in determining equilibrium configurations of domain structures in magnetic elements of spintronic devices, magnetic sensors and magnetic memory.

scholarly journals CHARACTERIZATION OF ANTENNA INTERACTION WITH SCATTERERS BY MEANS OF EQUIVALENT CURRENTS

2011 ◽  
Vol 116 ◽  
pp. 185-202 ◽  
Author(s):  
Cebrian Garcia-Gonzalez ◽  
Yuri Alvarez-Lopez ◽  
Aránzazu Domínguez Casas ◽  
Fernando Las Heras Andres
Keyword(s):  
Equivalent Currents
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