A method is described for measuring the resistivity of semi-conductors at centimetre wavelengths. A small spherical or cubic specimen is placed in a cavity resonating in the H011 mode, and the reduction in Q due to eddy-current loss in the specimen is measured. The theory given enables the resistivity of the material to be calculated. It is shown that resistivities in the range 0.005 to 10 cm can be determined.
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Linhart et al. (1956) studied this question.