Results 51 to 60 of about 50,611 (217)

Empirical Characterization and Modeling of the Propagation Channel Inside the VIRC

IEEE Access
Over-the-air (OTA) testing and electromagnetic compatibility (EMC) measurements are widely performed in classical reverberation chambers. A less-known reverberation chamber, yet a considerably efficient environment for generating multipath conditions, is
Mhd Zaher Mahfouz, Robert Vogt-Ardatjew, Andre B. J. Kokkeler, Andres Alayon Glazunov   +3 more
doaj   +1 more source

Measurement with quasi-isotropic antenna of CEM coming from multisource in a reverberation chamber and in a car

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The concern about the health risks that wireless technology can provide has grown globally thanks to the growing use of the devices by the population, by the finding that the public exposure to EMFs from the devices can be enhanced by the reflection of ...
Raquel Aline A. Rodrigues, Glauco Fontgalland, Galba F. Aragão, Felipe C. Lins Federal   +3 more
doaj   +1 more source

Over-the-Air Emulation of Electronically Adjustable Rician MIMO Channels in a Programmable-Metasurface-Stirred Reverberation Chamber [PDF]

arXiv, 2023
We experimentally investigate the feasibility of evaluating multiple-input multiple-output (MIMO) radio equipment under adjustable Rician fading channel conditions in a programmable-metasurface-stirred (PM-stirred) reverberation chamber (RC). Whereas within the "smart radio environment" paradigm PMs offer partial control over the channels to the ...
arxiv  

A statistical model for the excitation of cavities through apertures [PDF]

IEEE TEMC Vol. 57 N. 5 Oct. 2015, 2015
In this paper, a statistical model for the coupling of electromagnetic radiation into enclosures through apertures is presented. The model gives a unified picture bridging deterministic theories of aperture radiation, and statistical models necessary for capturing the properties of irregular shaped enclosures.
arxiv   +1 more source

A Preliminary Ray Tracing Approach to Computational Electromagnetics for Reverberation Chambers

Journal of Electromagnetic Analysis and Applications, 2010
This paper summarizes a theoretical design analysis for the implementation of an electromagnetic modelling tool, focussing on the simulation of electromagnetic field propagation inside reverberation chambers.
Filip Nauwelaerts, D. Van Troyen, Guy A. E. Vandenbosch   +2 more
openaire   +3 more sources

Enhancing Ultrasound Power Transfer: Efficiency, Acoustics, and Future Directions

Advanced Materials, EarlyView.
Implantable devices significantly enhance healthcare but are limited by battery life. Ultrasound power transfer technology offers a promising solution for sustainable operation. This review addresses gaps in current research, particularly in sound field analysis and energy efficiency optimization.
Yi Zheng, Zhuomin Zhang, Yanhu Zhang, Qiqi Pan, Xiaodong Yan, Xuemu Li, Zhengbao Yang   +6 more
wiley   +1 more source

On the Field Statistics in Nested Reverberation Chambers

IEEE Access
We study the normalized field statistics inside nested reverberation chambers (NRCs), through the analysis of the shielding effectiveness of enclosures and material samples.
Angelo Gifuni, Anett Kenderes, Giuseppe Grassini, Andrea Buono, Gabriele Gradoni   +4 more
doaj   +1 more source

Transforming Room Acoustics with Causality‐Driven Dual‐Function Passive Metamaterials

Advanced Materials Technologies, EarlyView.
This work presents an dual acoustic metamaterial for rooms that achieves excellent broadband performance for both sound absorption and sound diffusion. This is done by using causality formulations linking the absorption of the passive system to its volume, yielding an optimal surface area ratio required for excellent sound absorption and while ...
Eric Ballestero, Yang Meng, Ping Sheng, Vincent Tournat, Vicent Romero‐García, Jean‐Philippe Groby   +5 more
wiley   +1 more source

Design and Construction of a Small Reverberation Chamber [PDF]

, 2016
This paper describes the design of a small reverberation chamber. The lower usable frequency of the reverberation chamber designed in this paper is 2.3 GHz.
Krešimir Malarić, Kristijan Košutić
core   +1 more source

Correlation matrix methods to assess the stirring performance of electromagnetic reverberation chambers [PDF]

Wave Motion, 2019
Abstract The use of correlation matrices to evaluate the number of uncorrelated stirrer positions of electromagnetic reverberation chambers has widespread applications in electromagnetic compatibility. We present a review of recent methods based on multivariate correlation functions that relates statistical inhomogeneities in space (frequency) to the
Gabriele Gradoni, Valter Mariani Primiani, Franco Moglie   +2 more
openaire   +2 more sources