BDS measurements were conducted using a custom-made Rheo-dielectric tool composed of a Broadband Dielectric/Impedance Spectrometer connected to a strain-controlled rheometer. The temperature range investigated was from 135°C to 25°C, with a step of 5°C, while the frequency range was 10 1 –...
The input waveguide is first split into two waveguides, one to feed photons to the spectrometer, the other used for power calibration and monitoring the return power during the fiber-to-chip alignment. At the ends of the impedance tapers, the microstrip lines are converted to coplanar ...
I. Thin absorbing structure for all incidence angles based on the use of a high-impedance surface. Microw. Opt. Tech. Lett. 38, 175–178 (2003). Article Google Scholar Su, P. et al. An ultra-wideband and polarization-independent metasurface for RCS reduction. Sci. Rep. 6(20387), 1...
Dielectric permittivitySolid electrolyteAn experimental method and a corresponding setup have been developed for investigation of impedance spectra and other electrical properties of solid materials in radio frequencies from 300 kHz to 3000 MHz and temperature range 300–1200 K. The method is based on ...
Based on the interferograms directly acquired by a Fourier transform infrared spectrometer (FTIR), multi-beam interference principle combining Fresnel's formula is employed to extract the refraction index and the extinction coefficient, giving the basis for calculating dielectric coefficients. It avoids ...
A single transparent dielectric layer is commonly used as an antireflection (AR) coating. On the basis of destructive interference between the incident and reflected light, perfect optical impedance matching can be achieved for one specific wavelength3. Micron-sized pyramidal surface texturing is also ...
Numerical results for the dielectric antenna as a function of emission angle α. The collection angle of a NA = 0.42 lens is indicated by the dashed line. Inset shows the broadband operation of the dielectric antenna. All QDs randomly chosen across the membrane are bright ...
S21can safely be set to zero.Figure 4shows the simulation results for the normalized real and imaginary parts of the optical impedance for the Ti-disk broadband absorber. We can clearly observe that both the real and imaginary parts are matched to the respective vacuum values of one and zero...
2.2. High-Frequency Impedance Spectroscopy For the in situ determination of dielectric properties (including polarization, dielectric losses and conductivity effects) of zeolites and other catalytically active materials in the high-frequency (GHz) range, the microwave cavity perturbation method is the tool...
the resulting characteristic impedance will be approximately 50 Ω. Ice has anεR= 3.15 [8], and dilute frozen solutions will not have a very different dielectric constant, so this cell is appropriate, e.g., for frozen aqueous solutions of metal complexes and metalloproteins. Moreover, since...