Three-Component Perspective Test Study on Radio Wave Perspective of Ground Buildings

One of the most important diagnostic problems multilayer dielectric materials and coatings is the development of methods for quantitative interpretation of the checkout results their electrophysical and geometric parameters. The results of a study of the potential informativeness of the multi-frequency radio wave method of surface electromagnetic waves during reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings are presented. The simulation model is presented that makes it possible to evaluate of the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric coatings. The model takes into account the values of the electrophysical and geometric parameters of the coating, the noise level in the measurement data and the measurement bandwidth. The results of simulation and experimental investigations of reconstruction of the structure of relative permittivitties and thicknesses of single-layer and double-layer dielectric coatings with different thicknesses, with different values of the standard deviation (RMS) of the noise level in the measured attenuation coefficients of the surface slow electromagnetic wave are presented. Coatings based on the following materials were investigated: polymethyl methacrylate, F-4D PTFE, RO3010. The accuracy of reconstruction of the electrophysical parameters of the layers decreases with an increase in the number of evaluated parameters and an increase in the noise level. The accuracy of the estimates of the electrophysical parameters of the layers also decreases with a decrease in their relative permittivity and thickness. The results of experimental studies confirm the adequacy of the developed simulation model. The presented model allows for a specific measuring complex that implements the multi-frequency radio wave method of surface electromagnetic waves, to quantify the potential possibilities for the accuracy of reconstruction of the electrophysical and geometric parameters of multilayer dielectric materials and coatings. Experimental investigations and simulation results of a multilayer dielectric coating demonstrated the theoretical capabilities gained relative error permittivity and thickness of the individual layers with relative error not greater than 10 %, with a measurement bandwidth of 1 GHz and RMS of noise level 0,003–0,004.

Excitation of Instability of the F Region of the Ionosphere in a Powerful Radio-Wave Field

Uspekhi Fizicheskih Nauk ◽

10.3367/ufnr.0113.197408v.0730 ◽

1974 ◽

Vol 113 (8) ◽

pp. 730 ◽

Cited By ~ 4

Author(s):

V.V. Vas'kov ◽

Aleksandr V. Gurevich

Keyword(s):

Radio Wave ◽

Wave Field ◽

Powerful Radio ◽

F Region ◽

Powerful Radio Wave

75th anniversary of the N V Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radio Wave Propagation of the Russian Academy of Sciences (IZMIRAN) (Scientific session of the Physical Sciences Division of the Russian Academy of Sciences, 25 February 2015)

Uspekhi Fizicheskih Nauk ◽

10.3367/ufnr.0185.201506f.0631 ◽

2015 ◽

Vol 185 (6) ◽

pp. 631-631

Keyword(s):

Wave Propagation ◽

Radio Wave ◽

Scientific Session ◽

Radio Wave Propagation ◽

75Th Anniversary ◽

Physical Sciences ◽

Terrestrial Magnetism ◽

Russian Academy Of Sciences ◽

Academy Of Sciences

Observing The Universe with Radio Wave

The Journal of the Institute of Electrical Engineers of Japan ◽

10.1541/ieejjournal.136.4 ◽

2016 ◽

Vol 136 (1) ◽

pp. 4-7

Author(s):

Rikio WATANABE ◽

Yuki SHIBUYA ◽

Youhei SUGAHARA

Keyword(s):

Radio Wave ◽

The Universe

Oblique incidence radio-wave propagation and Es structure

Acta Geodaetica et Geophysica Hungarica ◽

10.1556/ageod.37.2002.2-3.15 ◽

2002 ◽

Vol 37 (2-3) ◽

pp. 261-270

Author(s):

P Bencze ◽

P A Bradley

Keyword(s):

Wave Propagation ◽

Radio Wave ◽

Oblique Incidence ◽

Radio Wave Propagation