Measurement of complex permittivity for biological cells at 1.7-2.6GHz by waveguide penetration method
نویسندگان
چکیده
In vitro studies to investigate biological effect of electromagnetic field are performed for microwave to millimeter-wave frequency band. A reliable measurement method of complex permittivity for biological cells is required for the dosimetry. The feasibility of applying the waveguide penetration (WP) method to measure complex permittivity for cells in the frequency range from microwave to millimeter-wave frequency band is investigated. In this study, complex permittivity measurement was performed at microwave frequency band from 1.7 to 2.6 GHz by the WP method, as a preliminary study. Lichtenecker's logarithm mixed law was applied to estimate macroscopic complex permittivity for cells. As a result, real part and imaginary part of complex permittivity of CHO-K1 cell were estimated to be 60.2 ~ 62.9 and 3.0 ~ 3.2, respectively.
منابع مشابه
Wide-band Rock and Ore Samples Complex Permittivity Measurement
Ground penetrating radar (GPR) is based on high-frequency electromagnetic wave propagation and its detecting targets are below the ground surface (Daniels, 2004; Jol, 2009). Velocity and attenuation are two important factors describing the electromagnetic wave in the media composed of rocks or soils. Velocity is inverse proportional to the root of the permittivity while other parameters are fix...
متن کاملMeasurement of Complex Permittivity of Liquids Using Waveguide Techniques
Complex permittivity of a number of liquids and binary mixtures has been studied by measurement using the waveguide techniques at the X and Ku band. Particular pieces of WR90 and WR62 waveguides were designed for the measurement of liquid materials. The custom designed TRL calibration kits are applied for calibration of the waveguide system. The measured results of complex permittivity of liqui...
متن کاملUnique Permittivity Determination of Low- Loss Dielectric Materials from Transmis- Sion Measurements at Microwave Frequen- Cies
A non-resonant microwave method has been proposed for accurate complex permittivity determination of low-loss materials. The method uses two measurement data of the magnitude of transmission properties of the sample. While the first datum must correspond to a frequency point resulting in a maximum magnitude of transmission properties, the other can be any datum at a frequency different than the...
متن کاملMicrowave Processing and Permittivity Measurement of Thermoplastic Composites at Elevated Temperature
The material properties of greatest importance in microwave processing of a dielectric are the complex relative permittivity ε = ε′ jε′′, and the loss tangent, tan δ = ε′′/ ε′. The real part of the permittivity, ε′, sometimes called the dielectric constant, mostly determines how much of the incident energy is reflected at the air-sample interface, and how much enters the sample. This paper show...
متن کاملComplex Permittivity Determination from Propagation Constant Measurements
This letter presents a new transmission line method for measuring the complex permittivity of dielectric materials using propagation constant measurements. In contrast to previous methods, a network analyzer calibration is unnecessary since calibrated scattering parameters are not required. We use measurements in X-band waveguide to show that this technique compares well with the transmission/r...
متن کامل