Topic
Dielectric loss
About: Dielectric loss is a research topic. Over the lifetime, 20296 publications have been published within this topic receiving 349254 citations.
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TL;DR: In this paper, the effect of dc electric field on the dielectric properties of Ba(Ti0.7Zr0.3)O3 ceramics with an obvious ferroelectric-relaxor behavior (Tm∼229 K, 10 kHz) is reported.
Abstract: The effect of dc electric field (E) on the dielectric properties of Ba(Ti0.7Zr0.3)O3 ceramics with an obvious ferroelectric-relaxor behavior (Tm∼229 K, 10 kHz) is reported. The dielectric constant is greatly suppressed and a low loss is obtained under dc electric fields (⩽40 kV/cm). The low loss (tan δ∼0.002) and high tunability (∼45%) were obtained for the Ba(Ti0.7Zr0.3)O3 ceramics around 300 K, indicating that it is a promising candidate for tunable materials at room temperature. The field dependence of the temperature (Tm) of the dielectric constant maximum follows the ΔTm∼E2/3 relation, indicating a second-order phase-transition-like behavior.
159 citations
TL;DR: A review of the dielectric loss spectra of polymers at microwave frequencies has been carried out in this paper, where a large volume of data for low loss polymers (polyethylene, polypropylene and poly(tetrafluoroethylene)), which are used in the communications industry, was available for review.
159 citations
TL;DR: In this article, the authors investigated the dielectric properties of three ceramic/epoxy composites, including self-synthesized BaTiO 3 and commercial Pb(Mg 1/3 Nb 2/3 )O 3.
159 citations
TL;DR: In this article, the analysis of a microstrip line covered with a low-loss sheet material is presented, and the results show that the characteristics of such a line are drastically affected by high dielectric constant.
Abstract: The analysis of a microstrip line covered with a low-loss sheet material is presented in this paper. Numerical results show that the characteristics of a microstrip covered with a thick sheet of high dielectric constant are drastically affected. The effect is more for small values of W/h ratio. A closed-form expression for the dielectric loss of a multilayer structure is derived.The extension of present method to high-loss materials is also discussed. Numerical and experimental results for effective dielectric constant of a microstrip covered with low- and high-loss sheet materials are compared and found to be in good agreement.
158 citations
TL;DR: In this paper, three different pore size carbon foams with variable electric conductivities were prepared by a polymer sponge replication method using a resonant cavity perturbation technique at a frequency of 2450 MHz.
158 citations