Dielectric constants of rubber and oil palm leaf samples at X-band

"Natural" Definition of the Modal Impedances in Non-Homogeneous Dielectric Loaded Rectangular Waveguide

“…n (y) (14) where the index n covers both T E y and T M y modes, the superscripts (1) and (2) refer to regions to the left and to the right of the discontinuity, respectively. Y…”

“…g (1,2) n (y) are defined as in (7). The x-functions in (14) are relative to the (1, 0) order mode, with k x,m = π/a, because the structure does not vary along x. In (14) we have introduced the following modal voltage amplitudes,…”

“…Expressions (15) and (16) can now be used in (14), then equating term by term, we can define a set of integral equations, where the unknown quantities are the expanding vector functions M (j) k . These integral equations can now be solved by using the method of moments.…”

“…The dielectric properties of the material are then determined from the scattering data using either an analytical or an optimization approach [12][13][14][15][16]. Even in this case, the EM field analysis needed for permittivity determination is performed in terms of a 3-D block, as in the above scenario.…”

Measurement of Dielectric Constant of Thin Leaves by Moisture Content at 4mm Band

“…Jong et al [8] presented a model for the scattering of radio waves from the canopy of a single tree, and the canopy was modeled as a cylindrical volume containing randomly distributed and oriented cylinders, representing the branches, and thin disks, representing the leaves. His model parameters are based on volumetric moisture content of leaves and branches.…”