The Bergman–Milton bounds provide limits on the effective permittivity of a composite material comprising two isotropic dielectric materials. These provide tight bounds for composites arising from many conventional materials. We reconsider the Bergman–Milton bounds in light of the recent emergence of metamaterials, in which unconventional parameter ranges for relative permittivities are encount...

A basic background is given of the concepts and measurements of dielectric phenomena, and two examples of dielectric-based biosensors are described. The way in which the dielectric properties of immobilized urease can be used to monitor the hydrolysis of urea is first outlined, while the second example describes how the phenomenon of dielectrophoresis can be used to monitor the concentration an...

Marble beams were subjected to gradually increasing three-point bending from low loading levels up to levels that significant damage was observed. After each loading step the permittivity was measured at three characteristic locations: the tensional, middle and compressional zone of each sample. The permittivity measurements were conducted in the frequency range from 1kHz to 1MHz. The permittiv...

The results are given of approximate calculations the relative permittivity εr conductive unmagnetic materials (metals and alloys) for a special case when conductivity displacement currents equal in homogeneous medium. above mentioned widely used electric power engineering high-voltage pulse conditions alternating (pulse) electromagnetic fields (EMFs) with different peak-temporal parameters act...

Abstract A self-powered system with a long lifetime would represent an opportunity in the development of next-generation, standalone Internet Things. Ceramic capacitors are promising candidates for energy storage components because their stability and fast charge/discharge capabilities. However, even density state-of-the-art needs to be increased markedly this application. Improving breakdown e...

In this work, we design a microstrip patch antenna having dimension of 3.279x4.232 mm<sup>2</sup> and consisting Foam-like substrate, relative dielectric permittivity 1 with width 0.5 mm, placed between two identical Rogers RT5880 substrates, value 2.2 as permittivity, loss tangent 0.0009 height 0.508 mm. The designed resonates at 28 GHz, featuring maximum gain 9.77 dBi wide frequen...