International Journal of Numerical Modelling: Electronic Networks, Devices and Fields
We present a semi‐analytical model for the quantitative investigation of the electromagnetic fields inside an infinitely long solenoid of rectangular cross section with planar laminated core comprised of interlaid dielectric and magnetic sheets. The model is based on a mathematical formulation of the electromagnetic boundary value problem inside the core as the superposition of two boundary value...
Wesley Pacheco Calixto,
Enes Gonçalves Marra,
Leonardo da Cunha Brito,
Bernardo Pinheiro de Alvarenga
This paper presents a methodology to calculate the value of Carter's factor for airgaps with polygonal slots. A numerical evaluation of the Schwarz–Christoffel transformation is performed using Genetic Algorithms. The methodology presented here extends Carter's method to airgaps with more complicated geometry. Some case studies compare the results of the developed methodology to Carter's results....
The paper presents a working electrical scheme modeling the memristor. The scheme allows experimenting with the model under various testing signals. The user can use it to verify the theoretical presumptions about the memristor properties. Examples of several typical measurements are shown. Copyright © 2010 John Wiley & Sons, Ltd.
A detailed investigation of the dark electrical characteristics of the lateral metal–semiconductor–metal (MSM) structures is carried out using a two‐dimensional numerical simulation based on the drift‐diffusion model. The model includes image force barrier lowering and current‐dependent recombination velocities at the Schottky contacts. The simulation was used to examine the details of the depletion...
The feasibility of numerical calculations of a through‐hole via using the Matrix‐Penciled Moment Method (MP‐MM) proposed by Show‐Gwo Hsu and Ruey‐Beei Wu is investigated. It shows that the MP‐MM cannot be used to the via that is near the source port, and there is a lower bounded operating wavelength beyond which MP‐MM is not applicable. The conclusions in this paper are proven by both theory and the...
Quantum effects play an important role in determining the double‐gate (DG) MOSFETs characteristics. The non‐equilibrium Green's function formalism (NEGF) in real‐space (RS) representation provides a rigorous description of quantum transport in nanoscale devices. Unfortunately, the traditional NEGF framework has the disadvantage of being heavy in computations. Methods that reduce the computations exist...
This paper presents a circuit modeling procedure for Ultra‐wideband (UWB) Tx‐Rx antenna systems based on frequency domain S‐parameters. The modeling used an existing two‐port network's model consisting of four SPICE analog behavioral modules. The accuracy of the model has been validated by comparing its transient response with the measurement result using an oscillograph. This model can be used for...
The paper presents a new algorithm for the identification of a positive real rational transfer matrix of a multi‐input–multi‐output system from frequency domain data samples. It is based on the combination of least‐squares pole identification by the Vector Fitting algorithm and residue identification based on frequency‐independent passivity constraints by convex programming. Such an approach enables...
In this paper a method to determine the mean value and the variance of the response of a system with uncertain parameters is proposed. With the term ‘response of a system’ we indicate either the value of a single parameter that represents a figure of merit of a device (e.g. the efficiency of a transmission system or the band width of a communication channel) or a characteristic function of the system...
A full‐wave analysis of the composite‐metal microstrip lines is presented. The effects of the composite metal to the loss of the microstrip lines are accurately investigated, which are often avoided by other methods. The metal layers of the microstrip lines are considered as lossy inhomogeneous layers. The effects of the thickness of the Au layer and Ti layer are given, respectively. And the reasons...
We implemented a frequency‐resolved optical gating (FROG) measurement method using cross‐phase modulation in a highly birefringent microstructure optical fiber. The standard FROG data reconstruction algorithm of generalized projection failed for this setup and we successfully used the genetic algorithm (GA) instead which is less prone to get stuck to local minima. GA has several parameters that must...
The increasing operating frequencies and decreasing IC feature size call for 3‐D electromagnetic (EM) methods, such as the Partial Element Equivalent Circuit (PEEC) method, as necessary tools for the analysis and design of high‐speed systems. Very large systems of equations are often generated by 3‐D EM methods and model order reduction (MOR) techniques are commonly used to reduce such a high model...
The fitted parameters for the analytic function used to specify the doping dependence of minority carrier lifetimes for In0.53Ga0.47As (InGaAs) is described in this paper. This model together with other carrier models was used to develop an interdigitated lateral PIN photodiode utilizing InGaAs as the absorbing layer. We propose the usage of spin‐on chemicals such as spin‐on dopants and spin‐on glass...
The aim of this article is to provide a systematic numerical experimental method to evaluate the thermomechanical reliability of plastic ball grid array (PBGA) under thermal cycling based on the Taguchi method. An L18(21 × 37) orthogonal array is designed for selecting eight control factors of BGA, which includes Printed Circuit Board) dimensions, substrate dimensions, dimensions of solder joints,...
In this paper, an electromagnetic bandgap (EBG) material in the range of 0.5–0.8 THz has been simulated with Arlon AR 600 (ε=6.0) as host material and air‐cylinders as the foreign embedded material. The effective dielectric permittivity of this material has been analyzed at the frequency range of 0.590–0.620 THz. The reduced effective dielectric permittivity substrate of thickness 50 µm has been used...
The hybrid volume‐surface integral equation approach is proposed to analyze the transmission and reflection characteristics of finite and curved frequency‐selective surfaces structures. The surface current and electric flux density are expanded by surface RWG and volume SWG basis functions, respectively. The multilevel fast multipole algorithm is applied to reduce the computational complexity. Simulated...
This study gives an original way to have a rapid idea of the position of the located defects on grounding systems. For determining electromagnetic fields' radiation, we use an easy method, based on analytical formula, transmission line theory, and modified images theory, instead of complex method of Summerfield's integrals. The cartography of the electromagnetic fields radiated at the soil—air interface,...
Simulation of device and circuit noise at low frequencies is often carried out as part of a small‐signal ac analysis. Moreover, circuit simulators with rf analysis capabilities usually specify circuit performance in terms of S parameters and model high‐frequency noise in terms of noise waves and correlation matrices. It is also unusual to find circuit simulators that extend noise simulation to the...
A novel hybrid analysis method including physical modeling approach is presented for the single complete via structure in this paper. The via structure can be decomposed into two types of different sub‐structures: the interior structure and the exterior structure. The characteristic of the interior structure consisting of the vertical via hole between reference planes is solved using the enhanced...