Experimental and numerical studies of dielectric properties of BaTiO/sub 3/-platinum composites at microwave frequencies

The conductor loading method has been used for creating a lossy dielectric material with a desired loss tangent. This method may also be applicable for developing high dielectric constant materials. In this paper, we will present the experimental results of the dielectric properties of BaTiO/sub 3/ and BaTiO/sub 3/ -platinum (BaTiO/sub 3/-Pt) composites. These composite materials were designed to increase the real part of the effective dielectric constant at high frequency. Three different platinum volume fractions were used, 3, 5 and 10%, to make BaTiO/sub 3/-Pt composites, in addition to a pure BaTiO/sub 3/ material. To characterize the BaTiO/sub 3/-Pt composites, microwave frequency measurements were conducted using the waveguide transmission technique. The experimental and numerical results verify that it is possible to increase the dielectric constant using the conductor loading method.