Biological Applications of a Technique for Broadband Complex Permittivity Measurements
نویسنده
چکیده
A broadband coax technique developed by us for the measurement of dielectric properties of biological substances upto at least 20 GHz, is discussed. For water-based materials such as blood or muscle substitute phantoms, a 0.047 inch size probe is essential to minimize errors due to radiation. The data indicate the importance of the dielectric volume of the constituents, and enable tailoring of phantoms and substitutes for use in biomedical applications.
منابع مشابه
A New Microwave Method Based on Transmis- Sion Scattering Parameter Measurements for Simultaneous Broadband and Stable Permittivity and Permeability Determina- Tion
A new microwave method has been proposed for simultaneous broadband and stable complex permittivity and complex permeability determination of magnetic and nonmagnetic materials. The method utilizes complex transmission scattering measurements at different frequencies. For a change in constitutive parameters determination, we considered zero-order and higherorder approximations. We have verified...
متن کاملCoupling of the effective properties of a random mixture through the reconstructed spectral representation
The spectral representation of the effective complex permittivity of a two-component composite medium is used to develop an approach to coupling of various effective properties of a random mixture. The spectral function contains all information about the microstructure, hence providing a coupling link between the various effective properties of the same composite material. It is demonstrated th...
متن کاملBroadband Microwave Measurements of Relative Permittivity and Permeability of Materials
A short review of modern techniques for broadband microwave measuring complex permittivity and permeability of materials at broadband microwave frequencies has been presented. Classification of type of the measurement methods to extract the complex permittivity and permeability of bulk materials has been done in this paper. Mathematical models of all the above-mentioned measurement types of met...
متن کاملBroadband coaxial cavity resonator for complex permittivity measurements of liquids
A novel cavity perturbation technique using coaxial cavity ruonators for the measurement of complex permittivity of liquids is presented. The method employs two types of resonators (Resonator I and Resonator ll). Resonator l operates in the fre quency range 600 MHZ-7 CH2 and resonator ll operates in the frequency range 4 Gliz-14 CH2. The introduction of the capillary tube filled wit? the sampl...
متن کاملTechnique for the electric and magnetic parameter measurement of powdered materials
A measurement technique for the electric and magnetic properties of powdered ferrites has been developed. This technique allows one to determine relative permittivity and permeability of powdered materials. Measurements were taken in a coaxial transmission line, which guarantees the broadband frequency measurements. The calculations were based on evaluation of the scattering parameters of measu...
متن کامل