| The characteristics of symmetric slots on the top-cover of TEo11-mode cylindrical cavity are analyzed in this paper. The approximate calculating method is proposed for the low loss and thin flake material perturbation outside of the cavity. The measured complex permittivities of teflon,polyvinyl chloride (PVC) ,pure ceramic flake are in good agreements with the standard data. The linear relation between 1/QL of the cavity and the conductivity of the semiconductor slice material with the same thickness agrees to the anticipation of the approximate calculating method.The theoretical analysis and experimental results show that contactless,high precision,multifunction parameters measurement of flake material are realized by using the slots of port-co-ver. The two-dimensional measurements are also realized by this method |
