Dielectric response of sandstones of Rajasthan in the frequency range 200 MHz-20 GHz

Characterization of tissue-equivalent materials for high-frequency applications (200 MHz to 20 GHz)

The dielectric constant of sandstones, 60 kHz to 4 MHz

Complex impedance data were collected for eight sandstones at various levels of water saturation (S,) in the frequency range of 5 Hz to 4 MHz. The measurements were made using a two-electrode technique with platinum electrodes sputtered onto the flat faces of diskshaped samples. Presentation of the data in the complex impedance plane shows clear separation of the response due to polarization at...

Dielectric properties of a clay soil determined in the frequency range from 1 MHz to 40 GHz

This contribution presents a dielectric spectroscopy study in which four different devices in combination with five different probes were used in order to measure the complex effective relative permittivity of a fine-grained soil in a frequency range from 1 MHz to 40 GHz. Subsequently, the dielectric measurements were combined to obtain a permittivity curve over the entire frequency range. Meas...

Interaction of electromagnetic radiation in the 20–200 GHz frequency range with arrays of carbon nanotubes with ferromagnetic nanoparticles

The interaction of electromagnetic radiation with a magnetic nanocomposite based on carbon nanotubes (CNT) is considered within the model of distributed random nanoparticles with a core-shell morphology. The approach is based on a system composed of a CNT conducting resistive matrix, ferromagnetic inductive nanoparticles and the capacitive interface between the CNT matrix and the nanoparticles,...

The dielectric properties of biological tissues: II. Measurements in the frequency range 10 Hz to 20 GHz.

Three experimental techniques based on automatic swept-frequency network and impedance analysers were used to measure the dielectric properties of tissue in the frequency range 10 Hz to 20 GHz. The technique used in conjunction with the impedance analyser is described. Results are given for a number of human and animal tissues, at body temperature, across the frequency range, demonstrating that...