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 article, a facile method to significantly enhance the dielectric performance of reduced graphene oxide-based polymer composites was reported, and the composites reinforced with a very low reduced reduced chlorinated GO (Cl-rGO) content of 0.2
127 citations
TL;DR: In this paper, the giant dielectric constant with the maximum of 53,120 was obtained in CaCu 3 Ti 4 O 12 ceramics at room temperature and 10 kHz.
127 citations
TL;DR: In this article, the atomic ratio of ferrum and cobalt has great influence on the formation of FeCo alloys and the surface of alloy becomes smooth gradually from distinct cone structure, and the saturation of alloys have been improved with the increase of Fe proportion.
127 citations
TL;DR: In this article, the authors measured the radiation efficiency of dielectric resonator antennas in the dominant hybrid (HE/sub 11/spl delta) mode and showed that the conduction losses are quite small.
Abstract: Radiation efficiency (due to conduction and dielectric losses) of dielectric resonator antennas has been measured. Results show that for dielectric resonators placed directly on a metallic plane, the conduction losses are quite small. A radiation efficiency of >98% has been measured for dielectric resonator antennas operated in the dominant hybrid (HE/sub 11/spl delta//) mode. Theoretical considerations show scope of further improvement in the radiation efficiency by choosing optimum resonator parameters. >
127 citations
TL;DR: In this article, the sensitivity of a single grain boundary in a magnesium oxide bi-crystal to the polarization of an applied microwave field as a function of temperature was measured, and it was shown that grain boundaries are the main contributor to the observed difference in dielectric losses between single crystals and polycrystalline ceramics.
Abstract: Reducing loss in microwave dielectrics is critical to improving performance in wireless communications systems. Grain boundaries in polycrystalline microwave dielectric ceramics have long been suspected of increasing dielectric loss. They are often cited as the main contributor to the observed difference in dielectric losses between single crystals and polycrystalline ceramics. The exact configuration of grain boundaries is problematic to quantify in practice and their influence on the dielectric loss difficult to distinguish from other defects such as porosity, oxygen vacancies, impurities, and dislocations. Here we measure the sensitivity of a single grain boundary in a magnesium oxide bi-crystal to the polarization of an applied microwave field as a function of temperature.
127 citations