A Preliminary Note on the Attenuation of Microwaves by Few Wood Species

Abstract

Microwaves are electromegnatic waves. The speed and attenuation of which depend on the medium in which they are propapted.This paper report on the attenuation of these by few indian Wood-species. The result have shown that the attenuation constant is linearly related to the specitic gravity of wood for specific gravity below 0.5 and is practically independent for specitic gravity range above 0.5. This trend offer a non-destructive method for detecting defecte like decayed portion of knot etc. inside the wood.