Results 1 to 10 of about 48,016 (44)
Charting the landscape of the environmental exposome
iMeta, Volume 1, Issue 4, December 2022., 2022 We describe the biological and chemical components of the environmental exposomes in three major environmental matrices that are highly relevant to human and social‐economical health—air, soil, and water. We discuss how different exposome components can interact with each other. Finally, we propose a list of outstanding challenges to be tackled to push
Xin Wei +6 more
wiley +1 more source
Antenna Radiation Efficiency Estimation From Backscattering Measurement Performed Within Reverberation Chambers [PDF]
IEEE Transactions on Electromagnetic Compatibility 2021, 2021 This paper presents a contactless measurement method for antenna radiation efficiency estimation within reverberation chambers (RCs). This method does not require to connect any analyzer to the antenna under test (AUT). The AUT radiation efficiency is obtained from the differential measurement of the RC composite $Q$-factor estimated for two AUT load ...
arxiv +1 more source
Experiment regarding magnetic fields with gravity
IET Quantum Communication, Volume 3, Issue 4, Page 218-228, December 2022., 2022 Abstract This experiment was designed to test the string theory as a physical reality. The ground‐based device placed the N poles of the magnets upwards, north, south, east, and west. Coil Ass'Y was placed between 2 N poles with bearing covers on the top and bottom.
Jong Hoon Lee
wiley +1 more source
Lossy chaotic electromagnetic reverberation chambers: Universal statistical behavior of the vectorial field [PDF]
Phys. Rev. E 93, 032108 (2016), 2015 The effective Hamiltonian formalism is extended to vectorial electromagnetic waves in order to describe statistical properties of the field in reverberation chambers. The latter are commonly used in electromagnetic compatibility tests. As a first step, the distribution of wave intensities in chaotic systems with varying opening in the weak coupling ...
arxiv +1 more source
Uncorrelated Configurations and Field Uniformity in Reverberation Chambers Stirred by Tunable Metasurfaces [PDF]
Appl. Phys. Lett. 118, 144101 (2021), 2019 Reverberation chambers are currently used to test electromagnetic compatibility as well as to characterize antenna efficiency, wireless devices, and MIMO systems. The related measurements are based on statistical averages and their fluctuations. We introduce a very efficient mode stirring process based on electronically reconfigurable metasurfaces ...
arxiv +1 more source
Diffuse field cross-correlations: scattering theory and electromagnetic experiments [PDF]
, 2021 The passive estimation of impulse responses from ambient noise correlations arouses increasing interest in seismology, acoustics, optics and electromagnetism. Assuming the equipartition of the noise field, the cross-correlation function measured with non-invasive receiving probes converges towards the difference of the causal and anti-causal Green's ...
arxiv +1 more source
Statistics of the electromagnetic response of a chaotic reverberation chamber [PDF]
Advanced Electromagnetics, 4(2), 38-43 (2015), 2014 This article presents a study of the electromagnetic response of a chaotic reverberation chamber (RC) in the presence of losses. By means of simulations and of experiments, the fluctuations in the maxima of the field obtained in a conventional mode-stirred RC are compared with those in a chaotic RC in the neighborhood of the Lowest Useable Frequency ...
arxiv +1 more source
Refining the Experimental Extraction of the Number of Independent Samples in a Mode-Stirred Reverberation Chamber [PDF]
International Symposium on Electromagnetic Compatibility (EMC
EUROPE), Amsterdam, 2018, pp. 719-724, 2018 We investigate the number of independent samples in a chaotic reverberation chamber. Its evaluation as defined by the IEC standard can be made more precise when using not the index of the first value larger then the correlation length but using the value obtained by a linear interpolation instead.
arxiv +1 more source
Average Linear and Angular Momentum and Power of Random Fields Near a Perfectly Conducting Boundary [PDF]
IEEE Trans. Electromagn. Compat., 2019, 2019 The effect of a perfectly conducting planar boundary on the average linear momentum (LM), angular (momentum (AM), and power of a time-harmonic statistically isotropic random field is analyzed. These averages are purely imaginary and their magnitude decreases in a damped oscillatory manner with distance from the boundary.
arxiv +1 more source
Experimental Investigation of 5G Base Station functionalities in Reverberation Chamber at Millimeter-Wave [PDF]
, 2023 The performance and functionalities of a commercial fifth generation base station are evaluated inside the reverberation chamber at the mmWave frequency range. The base station capability to operates in different propagation environment conditions reproduced by the reverberation chamber is investigated.
arxiv +1 more source