water is one of the most vital constituents in plants. in this research, for an estimation of leaf moisture content, the variation of capacitance was employed. the variations were measured via designed and manufactured capacitive sensors. the objective of the research was to estimate leaf moisture content by measuring its capacitance for five agronomic crops. experiments for measuring leaf capa...

Temperature measurement in microwave systems is essential for thermally driven processes, namely, catalytic reactions and ceramic sintering. Although, the application of direct thermometry methods, namely, thermocouples, have been commonly articulated in the available literature, however, contacted temperature measurement mechanisms have aroused concerns associated with the disruption of the el...

The dielectric properties and ionic conductivity of novel "ceramic state" polymer electrolytes for high capacity lithium battery are characterized by Radio frequency and Microwave methods in two broad frequency ranges from 50 Hz to 20 KHz and 4 GHz to 40 GHz. This innovative solid polymer electrolyte which is highly ionic conductive (10 S/cm at room temperature) from -40C to +150C can be used i...

In this research, BaTiO3 thick deposit has been successfully sprayed by air plasma spray. The microstructure and dielectric properties of thick films were investigated by secondary electron microscopy (SEM) and LCR meter respectively. XRD measurement was carried out on plasma sprayed BaTiO3. The results illustrate differences in the crystal structure between plasma sprayed coatings and feed sto...

The main purpose of this paper is to design, implement and measure a new sample of mantle cloak. A new method called mantle cloak is introduced by cloaking an object by a single, conformal meta-surface which can drastically suppress the scattering of the desired object. In this paper, a grid lattice is placed around a dielectric object as the cloaking structure. Previously, this FSS has been ut...

Measurement errors of a capacitive voltage transformer (CVT) are relevant to its equivalent parameters for which its capacitive divider contributes the most. In daily operation, dielectric aging, moisture, dielectric breakdown, etc., it will exert mixing effects on a capacitive divider’s insulation characteristics, leading to fluctuation in equivalent parameters which result in the measurement ...

A general review and comparison on two types widely adopted measurement techniques of dielectric constant and dielectric loss at microwave frequencies has been undertaken. Characteristics of various transmission/reflection techniques and resonance techniques are compared with each other. Suggestions on how to select adequate measurement techniques of microwave dielectric properties are given. T...

A systematic study on various resonance measurement techniques of dielectric constant and dielectric loss at microwave frequencies has been undertaken. Characteristics of various resonance techniques are compared with each other. Suggestion on how to select adequate measurement techniques of microwave dielectric properties is given. Practical measurements by different methods are made and the r...

We present a theoretical model and preliminary experimental results on the dielectric constant measurement of thin films by using differential time-domain spectroscopy. This technique greatly reduces the minimum measurable thickness, and it promises the dielectric constant measurement of mm-thick thin films with the frequency range from GHz to THz. © 2000 American Institute of Physics. @S0003-6...

Thus far, the measurement of dielectric properties of biological tissues has been achieved on the assumption that the biological tissues are homogeneous. In fact, most tissues should be heterogeneous because there are many small structures included in these tissues, such as blood vessel, nerve fiber and so on. When the dielectric properties of these tissues are measured by conventional sensor, ...