The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Layered-medium integral-equation (LMIE) methods that can confront the multiscale problems encountered in electromagnetic modeling of electronic packages are presented. The methods include (i) an impedance-boundary condition (IBC) formulation for modeling conductor thickness, roughness, and finite conductivity, (ii) non-radiating lumped-port models for extracting network parameters, and (iii) FFT based...
We demonstrate experimentally and numerically that a bilayer triangular-shaped chiral metamaterial (TCMM) gives a nearly perfect cross-polarization with 90% polarization conversion efficiency reported at X-band regime. The giant optical activity in the proposed TCMM arises due to the strong cross-coupling between the electric and magnetic dipole as a result of generated strong rotatory-power for the...
A fully printed micro-electro-mechanical (MEM) Reed Relay is demonstrated to provide zero off-state leakage (IOFF), low on-state resistance (RON) (∼15 Ω), and moderate switching delay (∼32 µs), while offering excellent immunity to mechanical stress variations in the printed cantilevers. Leveraging the stress gradient in sintered metal nanoparticles films and using a novel device architecture, this...
The focus of this paper will present Charge Flow which is a workflow based approach to manage the issue of chargeback within a Cloud environment. This work has been driven by the need for both private and public cloud operators to manage their virtualized infrastructures to ensure proper accountability so that resource usage is metered, charged and billed to the respective user of the virtualized...
In the present work, the location of the partial discharge source in transformer insulation was analysed by simulation studies. The partial discharge source was modelled such that it radiates the Ultra High Frequency (UHF) signal. The time of arrival of the UHF signal and the magnitude of the UHF signal at any sensor depends on its distance from the partial discharge source. The effect of the barrier...
The location of the partial discharge source in transformer insulation was analysed by simulation studies. The partial discharge source was modelled such that it radiates the Ultra High Frequency (UHF) signal. It was observed that there exists a time difference of arrival of the UHF signal at the sensors based on its distance from the location of the partial discharge source. Also the magnitudes of...
We present a novel technique for heterogeneous integration using gold filled Through Silicon Vias (TSV) and thermocompression bond bumps formed in a single fabrication step, using gold nanoparticles dispensed by inkjet printing. Gold-filled TSV arrays (12 × 12, via radius 50μm, pitch 250μm) have been demonstrated using this method. Void free, filled TSVs are reported, and thermocompression bonding...
In a limited form cellular providers have long shared spectrum in the form of roaming agreements. The primary motivation for this has been to extend the coverage of a wireless carrier's network into regions where it has no infrastructure. As devices and infrastructure become more agile, such sharing could be done on a much faster time-scale and have advantages even when two providers both have coverage...
In this work, a Q-band injection-locked frequency divider (ILFD) has been implemented in 90 nm CMOS technology. An ILFD topology of transformer-based dual-path injection was proposed to maximize the power gain of the injection path and improve the locking range of the ILFD. On-wafer measurements showed that with 0 dBm input power, the proposed ILFD achieves a 30.5 % locking range from 36 GHz to 49...
A method to cloak larger dimensional scattering objects against normal incident linearly polarized microwave is reported in this work. The cloaking device utilizes the principle of photonic crystal wave guiding mechanisms that mould and steer the wave path smoothly around the scattering objects. The proposed method is scalable at all length-scales from cm to nm band frequencies. This approach may...
The effect of drift region on the flicker noise in LDMOS devices in the linear and saturation regions is analyzed using measured data and device simulations. In the linear region, noise in the drift region arises from gate-drain overlap region and is significant for longer channel length devices. For shorter channel length devices, the sub-surface current flow in the gate-drain overlap region reduces...
A low-thermal-budget (CMOS-compatible) process for microshell encapsulation of MEMS devices is proposed. Inkjet-printing of silver (Ag) nanoparticle ink is demonstrated to form porous microshells through which sacrificial oxide (SiO2) can be selectively removed to release MEMS structures. A second inkjet printing process using finer gold (Au) nanoparticle ink is demonstrated to effectively seal the...
This paper presents a fully integrated 60 GHz two stage power amplifier for wireless applications using common source topology and power combining. The PA is implemented in a 90 nm low power CMOS technology. The output power of the amplifier has been improved with the help of Wilkinson power combining technique. Also the Wilkinson power combiner has been utilized as a part of input and output matching...
The conducting metal filament formation process of a typical resistive switching memory is comprehensively studied using Kinetic Monte Carlo simulation, which includes multiple physical and chemical mechanisms. The characteristics of the forming voltage, forming time and the so called "Voltage-time dilemma" are investigated. In addition filament topographies, which strongly influence device...
Since D flip-flop is one of the indispensable building blocks in integrated circuit (IC) design, providing a successful way to print D flip-flop on plastic foils will be the first step to reach fully printed flexible IC. Here, the network structure of single-walled carbon nanotubes (SWNTs) as an active layer has been employed to print the driver and load thin-film transistors (TFTs) of the D flip-flop...
Currently, numerically simulated synthetic seismograms are widely used by seismologists for seismological inferences. The generation of these synthetic seismograms requires large amount of computing resources, and the maintenance of these observed seismograms requires massive storage. Traditional high-performance computing platforms is inefficient to handle these applications because rapid computations...
This paper presents a low cost implementation of the phase-based sound localization method proposed in Halupka et al [2]. The implementation uses PSoC programmable mixed-signal embedded System on Chip, which incorporates microcontroller, on-chip SRAM and flash memory, programmable digital blocks and programmable analog blocks, all integrated on the same chip. In order to improve the localization accuracy,...
The wide scale deployment of Internet combined with several advancements in hardware and software technologies created opportunities for several Internet based applications such as Voice Over IP (VoIP) that involves the delivery of voice, video and data to the end user. SIP, the Session Initiation Protocol, is a signaling protocol for Internet conferencing, telephony, presence, events notification...
In recent years, Internet Protocol (IP) telephony is becoming popular because it offers more flexibility in the implementation of new features and services. Session Initiation Protocol (SIP) is a peer-to-peer, multimedia signaling protocol standardized by the Internet Engineering Task Force (IETF) plays a vital role in providing services to IP telephony. SIP is ASCII-based, resembling HTTP, and reuses...
In this paper, a simulation process based on Kinetic Monte Carlo (KMC) for an electrochemical metallization (ECM) resistive RAM (RRAM) is demonstrated. This simulation tool can investigate all the major dynamics properties of such devices. In particular, the voltage sweep rate dependent I-V characteristics, the variations of SET voltage, writing speed, on-state resistance, filament overgrowth phenomena...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.