Helical antennas have been a popular antenna configuration for various applications for its simple structure. This work describes the study on a novel, custom-shaped dielectric loaded helical antenna incorporated on an advanced material, which is Barium Strontium Titanate (BST). This material, which presents the researcher with an advantage in size reduction due to its high relative permittivit...

Atomic Layer Deposition of Platinum on Strontium Titanate Surfaces Tremendous energy savings and environmental benefits are possible from improved catalysts for chemical manufacturing and emissions reduction. Breakthroughs in catalyst development will be enabled by precise methods for synthesizing nanostructured materials. Atomic layer deposition (ALD) is a thin film growth technique that is cu...

Abstract In this study, we prepared a homogeneous fine powder of barium titanate (BaTiO 3 , BT) doped with different concentrations strontium (x = 0, 0.05, 0.125, 0.15, 0.20, and 0.3) having the composition Ba 1-x Sr x TiO (barium titanate, BSr T). XRD patterns Rietveld refinement revealed existence single tetragonal phase structure for BSrxT, 0–20%, cubic BSr30%T. The physical properties pure ...

We present the realization and analysis of microwave performances interdigited varactors integrating thin ferroelectric layers barium strontium titanate (BaxSr1?xTiO3). Devices based on films different compositions (x = 0.8 x 0.5) have been characterized in millimeter-wave domain, from 200 MHz to 110 GHz. By applying bias voltages, tunability capacitance can reach up 40% for Ba0.8Sr0.2TiO3 comp...

A metamaterial based on periodic ferroelectric inhomogeneities in a magnetic ferrite matrix including quantity of composite matrix, demonstrating relative low microwave losses and effective dielectric permittivity, was produced. Glass-ceramic composites, consisting low-melting glass barium-strontium titanate, were successfully synthesized incorporated into the holes to build meta-structure. Inv...