Measurement of Complex Permittivity of Polystyrene Composite at 11.64 GHz Using Cavity Perturbation Technique
Keywords:
Cavity perturbation, cavity resonator, complex permittivity, dielectric constant, dielectric loss, dielectric materialAbstract
Complex permittivity of polystyrene composites of different percentage of carbon black fillers are measured over the wide frequency range 8-12 GHz using X-band rectangular cavity resonator. The measurement technique uses the cavity perturbation technique. Validity of present measurement technique has been checked by measuring the dielectric properties of wellknown dielectric materials (Teflon and Rexolite). Polystyrene composites are very useful for lightweight shielding and absorbing materials. It would be of great interest for the community to find its dielectric properties over wider frequency range. Due to lack of experimental data on dielectric parameters of carbon black composite in literature, the experimental study has been conducted to measure the dielectric properties of polystyrene composite over wide frequency range of X-band (8-12 GHz). In addition, the estimation of measurement error associated with this technique is also discussed.
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