The use of time domain spectroscopy to measure the dielectric properties of mouse brain at radiowave and microwave frequencies

Abstract

It is shown that by employing the method described by A.W.J. Dawkins et al. (J. Phys. E: Sci. Instrum., vol.12, p.1091, 1979), time domain spectroscopy (TDS) can be used to measure accurately the permittivity and conductivity of tissue. The advantages of TDS are that with a single measurement a wide frequency range can be covered in less than 15 min, and with sample sizes less than 0.5 ml. This enables a number of measurements to be made on one tissue sample well within the lifetime of the sample, as opposed to using frequency domain techniques where more tissue samples would have to be taken thus adding to the variability in the results. Equally important is the saving in experimental time that is in itself a significant advantage of TDS results.