A.A. Belov – Leading Engineer, Higher School of Applied Physics and Space Technologies of Peter The Great

St. Petersburg Polytechnic University

E-mail: radar@radio.rphf.spbstu.ru

K.V. Greshnevikov – Ph.D.(Phys.-Math.), Associate Professor, Higher School of Applied Physics and Space

Technologies of Peter The Great St. Petersburg Polytechnic University

E-mail: kgreshnevikov@yandex.ru

G.P. Zhabko – Senior Lecturer, Higher School of Applied Physics and Space Technologies of Peter The Great

St. Petersburg Polytechnic University

E-mail: g_zhabko@mail.ru

E.L. Svechnikov – Ph.D.(Eng.), Leading Engineer, ITMO University (Saint Petersburg) E-mail: elsvech@mail.ru

Equations describing attenuation of electromagnetic waves by a forest with relatively thick tree trunks over a wide frequency band and for variable electrical parameters of wood are derived. The formulas allow to estimate the attenuation of coherent wave as well as the level of diffuse scattering.

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