scholarly journals A Novel Segmented Modeling Method of Via including the Effect of Power/Ground Plane Pair

2013 ◽  
Vol 2013 ◽  
pp. 1-16
Author(s):  
Zhaowen Yan ◽  
Zhicai Ma ◽  
Guochang Shi ◽  
Mingming Che
Keyword(s):  
Equivalent Circuit ◽  
Ground Plane ◽  
Equivalent Circuit Model ◽  
Resonance Method ◽  
Circuit Model ◽  
Modeling Method ◽  
Cavity Resonance ◽  
Single Plane ◽  
Model Match ◽  
Simulation Results

This paper focuses on the modeling method of common interconnects which act as coupling channels in the analysis of PCB immunity. Fast modeling and parameters extraction of power/ground plane pair are realized using cavity resonance method. The calculated results of the model match with the simulation results of HFSS within 9 GHz, which demonstrates the effectiveness of the modeling method. Besides, segmented via modeling method including the effect of power/ground plane pair is proposed. In this modeling method, via structure is decomposed into three parts, and each part is modeled, respectively. The modeling of single via and differential vias in single plane pair and multilayer is completed using this method. High accuracy is reached due to the adoption of the effect of power/ground plane pair and the adoption of second-order circuit model of capacitance and inductance, where the parameters can be gotten from analytic formulas. Finally, considering an actual signal network, for example, the equivalent circuit model of the network, is established, and every part of the equivalent circuit model is imported into Designer for cosimulation. The results are consistent with the simulation results of HFSS within 9 GHz.

scholarly journals Synchronous Machine Winding Modeling Method Based on Broadband Characteristics

2021 ◽  
Vol 11 (10) ◽  
pp. 4631
Author(s):  
Yu Chen ◽  
Xiaoqing Ji ◽  
Zhongyong Zhao
Keyword(s):  
Equivalent Circuit ◽  
High Frequency ◽  
Equivalent Circuit Model ◽  
Black Box ◽  
Synchronous Machine ◽  
Circuit Model ◽  
Modeling Method ◽  
Experimental Results ◽  
Box Model ◽  
Impedance Curve

The accurate establishment of the equivalent circuit model of the synchronous machine windings’ broadband characteristics is the basis for the study of high-frequency machine problems, such as winding fault diagnosis and electromagnetic interference prediction. Therefore, this paper proposes a modeling method for synchronous machine winding based on broadband characteristics. Firstly, the single-phase high-frequency lumped parameter circuit model of synchronous machine winding is introduced, then the broadband characteristics of the port are analyzed by using the state space model, and then the equivalent circuit parameters are identified by using an optimization algorithm combined with the measured broadband impedance characteristics of port. Finally, experimental verification and comparison experiments are carried out on a 5-kW synchronous machine. The experimental results show that the proposed modeling method identifies the impedance curve of the circuit parameters with a high degree of agreement with the measured impedance curve, which indicates that the modeling method is feasible. In addition, the comparative experimental results show that, compared with the engineering exploratory calculation method, the proposed parameter identification method has stronger adaptability to the measured data and a certain robustness. Compared with the black box model, the parameters of the proposed model have a certain physical meaning, and the agreement with the actual impedance characteristic curve is higher than that of the black box model.

Resonant Characteristics of Split Ring Resonator and Unit Cell for Periodic Metamaterial Devices

2021 ◽  
Vol 35 (11) ◽  
pp. 1378-1379
Author(s):  
Brinta Chowdhury ◽  
Thisara Walpita ◽  
B. Yang ◽  
A. Eroglu
Keyword(s):  
Equivalent Circuit ◽  
Ring Resonator ◽  
Equivalent Circuit Model ◽  
Split Ring Resonator ◽  
Circuit Model ◽  
Split Ring ◽  
Analytical Formulation ◽  
Lumped Element ◽  
Ring Structures ◽  
Simulation Results

The resonant characteristics of single split ring resonator-based metamaterial devices with single gap are presented using the analytical formulation developed for the lumped element equivalent circuit model. The characteristics of the metamaterial resonators have been investigated for different ring sizes, gap widths and substrate permittivity. Equivalent circuit model is developed for two ring structures. The analytical, and simulation results are compared and verified. The prototype has been then built and measured. It has been observed that all the results agree. The results presented in this paper can be used to develop devices at the THz range that can operate as sensors, antennas or tuning elements.

scholarly journals On the Broadening of Single-Layer Metasurface Bandwidth by Coupling Resonances

Materials ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2063 ◽  
Author(s):  
Humberto Fernández Álvarez ◽  
María Elena de Cos Gómez ◽  
Fernando Las-Heras Andrés
Keyword(s):  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Single Layer ◽  
Circuit Model ◽  
New Technique ◽  
Unit Cells ◽  
Simulation Results ◽  
A New Technique ◽  
Bandwidth Broadening

In this contribution a new technique to increase the bandwidth of metasurfaces without increasing their profile is presented. This work takes advantage of the potential multiresonant behavior of a metamaterial whose unit cells comprise nested metallization geometries in the same layer. The novelty stems from the possibility of overlapping these resonances for increasing the bandwidth (instead of obtaining a multiresonant metasurface). Several guidelines to achieve the aforementioned bandwidth broadening, which are applicable to all metasurface designs, will be provided. An equivalent circuit model will be used to better explain the presented technique; then, it will be applied to several metasurface absorbers (MTAs), showing not only a bandwidth broadening but also an absorption reinforcement. Measurements will be also presented to corroborate the simulation results.

A Research for Broadband Modeling Method of Electro-Absorption Modulator

2011 ◽  
Vol 130-134 ◽  
pp. 3242-3246
Author(s):  
Jian Wu ◽  
Qian Zhao
Keyword(s):  
Equivalent Circuit ◽  
Relative Error ◽  
Measurement Data ◽  
Equivalent Circuit Model ◽  
Modeling Method ◽  
Maximum Relative Error ◽  
Frequency Range ◽  
Circuit Partitioning ◽  
Impedance Model ◽  
Simulation Results

This paper improves the broadband equivalent circuit model (ECM) modeling method of Electro-absorption Modulator. According to the principle of Circuit Partitioning Simplified, the series form of the original increased frequency impedance model is transformed into the parallel form. The result shows that the new method eliminates the process of the impedance type verification, will not introduce new nodes, and reduces the computation. After testing, the maximum relative error of this model to fit measurement data is only 0.693%. This method’s simulation results are consistent with the test data of ECM better in 0-8GHz frequency range.

scholarly journals A nonlinear equivalent circuit model for flux density calculation of a permanent magnet linear synchronous motor

2015 ◽  
Vol 12 (3) ◽  
pp. 359-373
Author(s):  
Reza Ghanaee ◽  
Ahmad Darabi ◽  
Arash Kioumarsi ◽  
Mohammad Baghayipour ◽  
Mohammad Morshed
Keyword(s):  
Permanent Magnet ◽  
Equivalent Circuit ◽  
Analytical Method ◽  
Equivalent Circuit Model ◽  
Synchronous Motor ◽  
Circuit Model ◽  
Magnetic Equivalent Circuit ◽  
Linear Synchronous Motor ◽  
Proposed Model ◽  
Simulation Results

In this paper, a nonlinear magnetic equivalent circuit is presented as an analytical solution method for modeling of a permanent magnet linear synchronous motor (PMLSM). The accuracy of the proposed model is verified via comparing its simulation results with those obtained by two other methods. These two are the Maxwell?s Equations based analytical method and the wellknown finite elements method (FEM). Saturation and any saliency e.g. slotting effects can be considered properly by both nonlinear magnetic equivalent circuit and FEM, where it cannot be taken into account easily by the Maxwell?s Equations based analytical approach. Accordingly, as the simulation results presented in this paper confirm, the proposed nonlinear magnetic equivalent circuit is compatible with FEM regarding the accuracy while it requires very shorter execution time. Therefore, the magnetic equivalent circuit model of the present paper can be considered as a preferable substitute for the time consuming FEM and approximated analytical method built on Maxwell?s Equations in particular when required to be applied for a design optimization problem.

Equivalent Circuit Model of Top-Emitting OLED for the Designing of OLED-on-Silicon Microdisplay

2011 ◽  
Vol 383-390 ◽  
pp. 7037-7042
Author(s):  
Shao Xin Zong ◽  
Chuan Nan Li ◽  
Chen Huai Lv ◽  
Guo Hua Xie ◽  
Yi Zhao ◽  
...  
Keyword(s):  
Equivalent Circuit ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Spice Model ◽  
Simulation Results

In the commonly-used EDA software, there is no equivalent circuit model of top-emitting OLED for SPICE, so it is difficult while the OLED pixel driving circuits are designed such as in microdisplay applications. To solve the problem, its SPICE model of top-emitting OLED was studied in this paper. Three models including the diode-connected NMOS model, the single-diode model, and the double-diode paralleled model are discussed and their simulation results from EDA software HSPICE are compared. Results show that the fitted errors obtained from the diode-connected NMOS model is the smallest, but its simulated errors are the largest. The fitted errors and the simulated errors obtained from the single-diode model are also large. However, small fitted errors and simulated errors got from double-diode paralleled model show that this model satisfies the application of the designing for OLED pixel driving circuits.

scholarly journals Coaxially Fed Hexagonal Patch Antenna for C- and X-Band Applications with Reduced-Ground Plane

2019 ◽  
Vol 17 (2) ◽  
pp. 136-143 ◽  
Author(s):  
Abhishek Joshi ◽  
Rahul Singhal
Keyword(s):  
Equivalent Circuit ◽  
Patch Antenna ◽  
Ground Plane ◽  
Equivalent Circuit Model ◽  
Circuit Model ◽  
Impedance Bandwidth ◽  
X Band

The consequence of reduced ground plane in a coaxially-fed hexagonal antenna, on impedance and radiation is analyzed and presented here. Measured and simulated impedance results for a designed antenna are compared with the equivalent circuit model in this paper. The reduction in ground plane excited frequencies in upper C-band and lower X-band. The designed hexagonal antenna uses a substrate with a dimension of 32×33.5 mm2 along with a reduced ground plane of area, 10.44×24.44 mm2. The proposed antenna has a 285 MHz and 380 MHz impedance bandwidth in C-band and X-band respectively. The designed antenna with reduced ground plane works well for C-band and X-band applications.

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