Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
For its unique electronic characteristics [1,2], graphene has been a material of great interest for scientists since its discovery. While its incredibly high mobility is attractive for high frequency field effect transistor realizations [3], the zero bandgap energy spectrum gives a modest transistor reliability for di…
Computational electromagnetics has become a real cornerstone in the design of microwave and millimeter wave components and systems. One of the major computational techniques used in these designs is to solve integral equations with the Method of Moments (MoM). Traditionally, MoM has been used extensively for antennas,…
In this paper, a time-frequency filter is designed, which can detect the frequency, amplitude and phase of any order harmonics and interharmonics in signal by means of time domain convolution. The theory analysis are carried to this method and the calculate formula are concluded, the spectral leakage and the barrier d…
Gate stacks (rare-earth oxides, REOs-HfO2) grown on Germanium substrates using REOs (e.g. CeO2, Dy2O3, La2O3) as an interfacial buffer layer which are also friendly with Ge, demonstrating better passivation and electrical properties [1]. However, it is imperative to study a number of reliability concerns such as, accu…
The paper reports the analysis of defect induced 2D Circular dielectric slab with air hole in waveguide cavity. Two types of defect modes have been used: point defect and Line defect mode and found a good agreement between simulation and measured results. A band gap of 1.14 GHz without defect mode have been analyzed w…
The Perovskite type BaZn1/3Ta2/3O3(BZT) ceramic filled High density polyethylene (HDPE) composite with different volume fractions (Vf) up to 0.45 were prepared. The effect of filler content on the dielectric properties were studied both at radio and microwave frequencies. As the volume fraction of the filler increased…
Graphene nanoelectronics have made significant progress over the past five years particularly in material synthesis, device physics, and circuit applications. The high achievable mobilities at room temperature coupled with its high linearity (or invariant-transconductance) [1], and transit frequencies that exceed conv…
The present paper investigates the microwave dielectric properties of LiMgPO4ceramic green tapes. The composition of slurry for tape casting has been optimized by sedimentation studies and viscosity measurements. LiMgPO4 green tape has an εrof 2.8 and tanδ of 0.055 at 5 GHz.
Surface Acoustic Wave (SAW) filters form key components in RF and IF stages of many of today's wireless communication systems. Their small size and rugged construction make them an obvious choice in designs where size and weight are at a premium. IF SAW filters provide excellent design flexibility and shape factors bu…
The SiGe quantum well (QW) tunneling diodes with different Si cap thickness are designed in this work to investigate the detailed mechanism of light emission for the metal-insulator-semiconductor light-emitting diode (MIS LED). At the accumulation (negative) gate bias, the electrons tunnel from the metal gate to the S…
In this paper we report the development of a low-temperature sinterable Cu2ZnNb2O8(CZN) based composite for low-temperature cofired ceramic (LTCC). The CZN ceramics were prepared by the solid-state ceramic route. The calcination and sintering temperatures of CZN were optimized at 800 °C and 975 °C, respectively, for t…
A section of the Eastern Regional Power Grid in India has been simulated in this paper using Alternative Transient Program (ATP) for the purpose of defining high frequency transient voltages which may occur during various switching events. The investigation reveals that such oscillatory voltages could excite natural f…
The main objective of this paper is to develop Fuzzy logic controller to analyse the performance of instantaneous real active and reactive power (p-q) control strategy for extracting reference currents of shunt active filters under balanced, un-balanced and non-sinusoidal conditions. When the supply voltages are balan…
Oxide semiconductor TFTs are of interest where low-cost, high mobility, and compatibility with flexible substrates is required. We have previously demonstrated high quality thin-film transistors (TFTs) using ZnO and Al2O3deposited at low temperature (200°C) by weak oxidant, plasma-enhanced atomic layer deposition (PEA…
In order to suppress short channel effects as gate length of field effect transistors (FETs) continues to downscale, multi-gate FETs and nanowire FETs (NW-FETs) are poised to replace traditional planar devices. Top-down defined NW-FETs are susceptible to etching damages and the size of which is limited by lithography.…
A study of the conductivity type of undoped high quality ZnO thin-films grown on (100) Si substrates by pulsed laser deposition (PLD), is reported. Two groups of samples were prepared at a wide range of growth temperatures between 150 and 350°C and oxygen overpressure of 5.5×10-6Torr (low oxygen pressure regime) for o…
In this work we were observed epitaxial growth at the interface during the deposition of intrinsic a-Si:H layer on c-Si substrates by the hot wire chemical vapor deposition(HWCVD) technique. This crystallinity at the interface gets initiated during the deposition of the first few angstroms of a-Si:H on the c-Si wafer.…
This paper investigates the effect of a metamaterial superstrate on a single-feed circularly polarized microstrip patch antenna (SFCP-MPA) using CAD simulations. Simultaneous enhancement on antenna gain (up to 3dB), impedance bandwidth (BWZ) and axial ratio bandwidth (BWAR) are observed as well as multi-frequency oper…
Theoretical studies predict that the pattern of functional groups, or defects, will substantially affect the electrical and optical properties of low-dimensional systems such as single-walled carbon nanotubes (SWNTs) and graphene [1, 2]. Experimentally, it has been challenging to spatially control the defect generatio…
Recently, photo conductive properties of Graphene have been explored theoretically in [1] and experimentally in [2, 3]. In this paper we propose to build an optical bio sensor using Graphene Nano Ribbon (GNR). It is known that the band gap of GNR is controlled by the width of ribbon. The relation between the band gap…