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An alternative technique is presented for the determination of the electrical properties of dielectric materials. Two dielectric elements are placed inside a rectangular waveguide and complex scattering parameters are used to extract their relative permittivity values. The technique is based on the modification of the DIRECT algorithm to cope with cost functions with large number of minima. To improve...
We present a simple analytical implementation of the static singular integrals arising in the volume/surface integral equation formulation for the analysis of mixed conducting and dielectric structures such as printed circuits with finite-size dielectric objects. The singularity of the Green's functions is extracted from the kernel of the integral equation as a static term. This term is then evaluated...
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