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As integrated circuit (IC) chips keep growing in size, I/O data rates and complexity, electrical margin left on printed circuit board (PCB) gets smaller. Mid-loss or even low-loss material may be needed in more cases to meet high speed (HS) signal routing length requests, which leads to cost-adder on PCB. This submission introduces analysis flow as well as practical methods targeting reducing PCB...
Direct stimulation of deeper brain tissues by transcranial magnetic stimulation (dTMS) plays an important role in the study of reward and motivation mechanisms, which may be beneficial in the treatment of several neurological and psychiatric disorders. This paper presents numerical simulation of dTMS by considering the deformed Halo-circular assembly coil (dHCA coil). Three-dimensional distributions...
This pilot study investigates the neuro-psychological impacts of wireless power transfer (WPT) of electric vehicles, by correlating the electromagnetic radiation (EMR) with brain wave activities. In our experiments, fourteen subjects participated, under a one-blind controlled 10 MHz EMR of WPT environment. Electroencephalographs (EEGs) were recorded for each 5-minute time session before, during, and...
A new type of rectangular microstrip line-to-waveguide (MSL-to-WR) millimeter-wave (MMW) transition is proposed. This type of transition provides compact size and simple fabrication, which consists of a microstrip line inserted into the H-plane of the waveguide. So, it not requires a relatively complex waveguide mount extending on both sides and the planar substrate has not to be cut into specific...
Measurements of the ferromagnetic materials' magnetic performance are of great importance to the design of motor and some other electrical equipment. But environment is filled with a lot of electromagnetic interference signals causing the measurement result inaccurate. It is necessary to investigate the electromagnetic interference to the magnetic properties measurement. This paper designs an electromagnetic...
This paper demonstrated electro-thermal- stress interaction of Gallium Nitride (GaN) high electron mobility transistors (HEMTs) breakdown with a high-power microwave (HPM) pulse injected. A series of GaN HEMT-based power amplifiers were designed and measured by using a special HPM system for characterizing their power-to-failure values. The crack area in the field plate of GaN HEMT was also characterized...
The paper presents a time-domain model for the jitter of the clock path due to external electromagnetic interference on the power supply. A programming algorithm based on the model is raised to calculate numerically the value of the jitter. Transistor-level HSPICE simulations are executed on clock paths of various lengths. The clock gate is inverter of SMIC 130 nm, 1.2 V technology. Relationship between...
Shielding cover effects in LDMOS transistor are investigated in this paper. The internal and outer matching structures on the PCB are simulated using the commercial full-wave software HFSS. Under an Automation Testing Bench, the input-output responses of PA module are measured and compared. Finally, an improved scalable LDMOSFET PA model is proposed to predict three feedback path which give further...
Transient voltage suppressor (TVS) has been widely used for electronic system ESD protection. A good TVS is usually costive as it needs some special processes and with extra masking layers for fabrication. A novel TVS design based on the standard CMOS process will be much attractive. This work proposes a new TVS device using a CMOS compatible diode-triggered silicon controlled rectifier (DLVTSCR)...
The ability to accurately simulate and model Double Data Rate Synchronous Dynamic Random Access Memory (DDR SDRAM) memory channels before an actual system is fabricated is an important requirement in early phase chip-package-board co-design to derive preliminary design feasibility information. Subsequently, there is a need to validate these memory channel simulation results once the actual memory...
Using the method of multipolar expansion in spherical harmonics, the electromagnetic interference between two systems can be determined from their equivalent models. However, a multipolar expansion depends on the position of the origin: a bad choice can yield a complicated equivalent model, even for a simple source. As a consequence, the calculation of the coupling between two sources can also become...
Due to the diffraction limitation, images acquired from the electromagnetic distribution detection are blurred by a parabolic reflector imaging system and super-resolution algorithm is thus needed to improve the resolution. By using an effective algorithm, the point spread function (PSF) can be obtained as a function of frequency, however, the frequency of electromagnetic source distributions are...
The proposed integrated design of WuRx front-end with bandpass filter and frequency synthesizer applying in dedicated biomedical systems has been successfully implemented. The aperture phase detector and phase to analog converter has low power frequency synthesizer might be a promising wireless electrical power source and including wake up receiver technology using direct active RF detection for biomedical...
The purpose of this paper is to consider the impact of humidity and temperature on the electrical properties of printed circuit boards (PCBs). PCB base materials are glass reinforced thermosetting laminates using a variety of resin systems with different loss characteristics.
A planar reflector which is built from simple periodically 15×15 square patches on a grounded dielectric substrate without vias is described. The design of the planar reflector is based on the structure of artificial magnetic conductor (AMC) and intended to work at S-band frequency with certain bandwidth. At the first step, a unit cell of AMC is designed and characterized looking at the variation...
The effects of cuboid antenna-radome on base station antenna in the mobile communication band are investigated in this paper. The performance of base station antenna with and without radome is studied and compared. Numerical analysis based on the results of measurement under the same condition is presented to illustrate how the parameters of radome affect the performance of antenna. The analysis intends...
As a result of the power train electrification in electric and hybrid vehicles the electromagnetic compatibility of these vehicles is comprehensively affected. Especially the power electronic components operated at battery voltages of around 400V produce broadband EMI inside the vehicle. To prove compliance with the normative requirements considering the vehicles inner EMC, EMI measurements on component...
In this paper, a method is proposed to analyze the Fano resonance observed in the Mie scattering from a homogeneous dielectric cylinder. By using this method, we can calculate the Fano parameter and resonance width easily. An analytic condition for the occurrence of Fano resonance in the homogeneous cylinders can also be shown.
Predicting the immunity of printed circuit boards (PCBs) to radiated electromagnetic interference (EMI) requires the computation of the electromagnetic field's coupling to PCB traces. A modified Taylor-based analytical model exists developed and validated for PCB's immunity prediction. In this paper, we present the methodology of development of an electronic design automation (EDA) extension for Altium...
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