MODEL SCATTERING OF RADIO WAVES IN A FOREST 

Sannikov Sergey Petrovich, candidate of technical sciences, associate professor, sub-department of automation of production processes, Ural State Forestry Technical University (37 Sibirskiy trakt street, Ekaterinburg, Russia), ssp-54@mail.ru
Pobedinskiy Vladimir Viktorovich, doctor of technical sciences, professor, sub-department of service and technical operation, Ural State Forestry Technical University (37 Sibirskiy trakt street, Ekaterinburg, Russia), pobed@e1.ru
Pobedinskiy Andrey Anatol'evich, applicant, sub-department of automation production processes, Ural State Forestry Technical University (37 Sibirskiy trakt street, Ekaterinburg, Russia), pobed@e1.ru

630.52:587/588

10.21685/2307-5538-2017-3-6

Background. The subject of the study were sections of the forest environment with different forest plantations. The subject of the research were the regularities of the change in the magnitude of the scattering of radio waves in the process of radio frequency monitoring of the forest, depending on the characteristics of the forest environment, the design parameters of the equipment, the parameters of electromagnetic radiation and climatic conditions. The aim of the work was to develop a model for scattering radio waves in the forest environment.
Materials and methods. To conduct research as scientific methods, mathematical modeling methods, information theory and signal transmission, methods for calculating electromagnetic fields in forest areas, theory of experiment, mathematical statistics were used. For the experiments, techniques and equipment for laboratory and experimental studies were developed that includes RFID sensors, transmitters, three types of antennas, a receiver, a computer and specially developed software for processing received information.
Results. The results are the proposed design model for propagation of a direct wave in a forest environment, a geometric design model for the propagation of a radio wave beam in a forest, and a model for dispersing radio waves in a forest environment. The obtained results are necessary for the design of radiofrequency monitoring systems of the forest fund.
Conclusions. The received model of radio wave scattering in the forest environment takes into account all the main influencing parameters, gives fairly accurate results, the adequacy of the model is confirmed by the results of experimental studies, therefore the results can be recommended for use in the design of radio frequency monitoring systems of the forest.

radio frequency monitoring the timber fund; the diffusing radio waves in timber ambience; complex dielectric constant of the forest area; parameters of the timber ambience