Range Of Radio Waves Research Articles

Microwave magnetic resonance in some quick-hardened metal glasses

Development of research technique of magnetoresonance properties in a mm radiowave range is represented. The paper gives experimental data for metal glasses based on Fe and Co, and new substances, demonstrating magnetic phase transitions at the low temperature.

Magnetic resonance in amorphous metals based on Fe in the millimeter radiowave range

The research technique of amorphous magnetics is described. The paper gives the experimental data obtained by a multifunctional low-temperature radiospectrometer “Buran” in the mm radiowave range and presents their analysis.

Observation of radio-wave pulses in solids under lazer irradiation

Abstract A new effect of generation of the electromagnetic pulses (in a radio-wave range) under irradiation of solids with a lazer beam has been observed. The parameters of the electromagnetic radiation pulses were shown to be connected with the characteristics of the samples under study. Analysis of the experimental results has also shown the connection of duration of the radio-wave pulses with a density of dislocations in the samples. The observed electromagnetic radiation appearing under the lazer beam irradiation od solids is suggested to be a source of information about physical processes and characteristics of solids.

Distribution of the radio brightness of the galactic background in the decameter range of radio waves

Distribution of the radio brightness of the galactic background in the decameter range of radio waves

Measuring apparatus for biological and medical investigations in centimeter range of radiowaves

Measuring apparatus for biological and medical investigations in centimeter range of radiowaves

Investigation of the Attenuation of Electromagnetic Waves and the Distances Reached by Radio Stations in the Wave Band from 200 to 2000 Meters

The paper gives the results of a large number of field strength measurements in which the relative radiation characteristics of the transmitting and receiving stations remain constant even on changinig their distance. The constant of attenuation as a function of the wavelength was determined for the propagation of waves over land from these measurements. The method used eliminates the errors in the absolute determination of the received field strength. The attenuation values that were obtained were used for the calculation of the received field strengths as a function of wavelength and distance in two examples (long-wave Zeppelin and long-wave airplane station). We see that it is more important to use a long wave over land than over water. The best waves as regards propagation and radiation can be deduced from this work. The dependence of the internal efficiency of the antenna circuit and of disturbing reflections on the wavelength must be considered especially carefully. The results of the work make possible the numerical calculation of the range of radio waves over land in the wave band between 200 and 2000 meters. They should be more reliable than the rule-of-thumb methods hitherto used.