By a News Reporter-Staff News Editor at Journal of Technology -- New research on Antennas and Propagation is the subject of a report. According to news reporting out of Thousand Oaks, California, by VerticalNews editors, research stated, "An investigation of the interaction of a conductive sphere with an electromagnetic wave with attention given to space-charge effects would appear timely, as there is much current interest in the electromagnetic properties of mesoscopic structures. In this study, the polarization of a small semiconductor sphere immersed in a dynamic electric field is explored analytically and numerically."
Our news journalists obtained a quote from the research from Agilent Technologies, "In one approach, suitable for a sphere with low to moderate charge carrier concentration, the Poisson's equation is coupled with the transport equations of the carriers, leading to a quasi-static formulation under the weak-field approximation. Screening effects of the charges on the interior field are revealed, along with a current distribution that is essentially uniform over much of the volume of the sphere. Frequency dependence of the total induced dipole moment of the sphere displays strong dispersion and absorption near the bulk plasma frequency. Validity of the quasi-static assumption is assessed by comparison to results of calculations based on a full-wave formulation."
According to the news editors, the research concluded: "As the nominal carrier concentration exceeds 10(20) cm(-3), the quasi-static solutions for interior field and current distribution begin to deviate from the full-wave solution and the latter must be employed to provide a realistic account of the charge-wave interaction within the sphere."
For more information on this research see: Charge Polarization and Current Distribution in a Conductive Particle in the Rayleigh Region. IEEE Transactions on Antennas and Propagation, 2013;61(8):4229-4238. IEEE Transactions on Antennas and Propagation can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers - www.ieee.org/; IEEE Transactions on Antennas and Propagation - ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=8)
Our news journalists report that additional information may be obtained by contacting T. Shen, Agilent Technol, Thousand Oaks, CA 91360, United States. Additional authors for this research include M. Yan and T.T.Y. Wong.
Keywords for this news article include: California, Thousand Oaks, United States, Antennas and Propagation, North and Central America
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