Article

Numerical analysis of self‐focusing effect caused by inhomogeneity of microwave energy density in ionosphere

Naoki ShinoharaNaoki Shinohara: graduated in 1991 from the Department of Electronic Engineering, Kyoto University, where he received his M.S. degree in 1993 and, at present, he is in the doctoral program. He has been engaged in research on microwave energy transmission to be used by the solar power station (SPS). He is a special Research Associate with the Japan Society in the Promotion of ScienceHiroshi MatsumotoDavid R. Shklyar: graduated from Novosibirsk National University in Russia in June 1971. In 1974, he obtained a Ph.D. from ISMIRAN. In 1974, he became an Assistant Professor in the theoretical section of the same institute. In 1985, he was an Assistant Professor in the ionospheric research section and in 1990 became a Professor. His specialty is space plasma physics. He has recently been working mainly on the wave-particle interactions in inhomogeneous magneto-spheric plasmaD. R. ShklyarHiroshi Matsumoto: graduated from the Department of Electronic Engineering, Kyoto University, in 1965 and received his M.S. degree from there in 1967. In 1967, he became a Research Associate at the Faculty of Engineering. He received his Ph.D. degree later. After serving as an Associate Professor, he became a Professor at the Radio Atmospheric Science Center in 1987 where he became Director in 1992. His specialization is space plasma physics, space radio engineering, and space energy transmission. In 1975, he received a Tanakadate Award from the Japan Earth Electromagnetic Field Society. He is the author of Modern Radio Science (URSI) and has published many papers

Electronics and Communications in Japan (Part I Communications)journal1996en

ABI

Abstract

Abstract In this paper, the results of numerical analysis based on the theoretical analysis of the self‐focusing effect when a microwave beam propagates through the ionospheric plasma from the solar power station (SPS) to the ground are shown. The self‐focusing effect of the microwave beam is either caused by the plasma heating by the microwave beam or caused by the spatial gradient of the electromagnetic beam intensity. In this paper, the latter case is discussed. Since the microwave frequency used in the SPS is six orders of magnitude higher than the maximum collision frequency in the ionosphere, the theory used in this paper assumes a collisionless plasma and is derived from Maxwell's equations and the equation of motion. The self‐focusing effect of the microwave beam predicted by the theory is determined by five parameters: plasma density and temperature; microwave frequency; intensity; and the spatial gradient of intensity. In this paper, based on the results of the numerical analysis of the theoretical equations, the self‐focusing effect under the parameters related to the microwave beam used in the energy transmission of a future SPS is described.

Topics

Energy Harvesting in Wireless Networks

Identifiers

DOI: 10.1002/ecja.4410790910

Citations and references

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