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

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.

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

Applied Computational Electromagnetics Society ◽

10.47037/2020.aces.j.351158 ◽

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.

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

Serbian Journal of Electrical Engineering ◽

10.2298/sjee1503359g ◽

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.

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

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.383-390.7037 ◽

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.

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

International Journal of Antennas and Propagation ◽

10.1155/2013/389516 ◽

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.

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Equivalent circuit model for organic single-layer diodes

Journal of Applied Physics ◽

10.1063/1.2980324 ◽

2008 ◽

Vol 104 (6) ◽

pp. 064503 ◽

Cited By ~ 26

Author(s):

A. Haldi ◽

A. Sharma ◽

W. J. Potscavage ◽

B. Kippelen

Keyword(s):

Equivalent Circuit ◽

Equivalent Circuit Model ◽

Single Layer ◽

Circuit Model

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Equivalent Circuit Model for Electric Double Layer Capacitors and its Applications

IEEJ Transactions on Power and Energy ◽

10.1541/ieejpes.131.524 ◽

2011 ◽

Vol 131 (6) ◽

pp. 524-529

Author(s):

Susumu Yamashiro ◽

Koichi Nakamura

Keyword(s):

Equivalent Circuit ◽

Double Layer ◽

Electric Double Layer ◽

Equivalent Circuit Model ◽

Circuit Model ◽

Double Layer Capacitors ◽

Electric Double Layer Capacitors

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An Equivalent Circuit Model for Vertical Comb Drive MEMS Optical Scanner Controlled by Pulse Width Modulation

IEEJ Transactions on Sensors and Micromachines ◽

10.1541/ieejsmas.132.1 ◽

2012 ◽

Vol 132 (1) ◽

pp. 1-9 ◽

Cited By ~ 7

Author(s):

Satoshi Maruyama ◽

Muneki Nakada ◽

Makoto Mita ◽

Takuya Takahashi ◽

Hiroyuki Fujita ◽

...

Keyword(s):

Equivalent Circuit ◽

Pulse Width ◽

Pulse Width Modulation ◽

Equivalent Circuit Model ◽

Circuit Model ◽

Comb Drive ◽

Optical Scanner

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A Novel, Improved Equivalent Circuit Model for Double-Sided Linear Induction Motor

Electronics ◽

10.3390/electronics10141644 ◽

2021 ◽

Vol 10 (14) ◽

pp. 1644

Author(s):

Qian Zhang ◽

Huijuan Liu ◽

Tengfei Song ◽

Zhenyang Zhang

Keyword(s):

Finite Element ◽

Finite Element Model ◽

Equivalent Circuit ◽

Skin Effect ◽

Equivalent Circuit Model ◽

Element Model ◽

Circuit Model ◽

End Effects ◽

3D Finite Element ◽

Linear Induction

A novel, improved equivalent circuit model of double-sided linear induction motors (DLIMs) is proposed, which takes the skin effect and the nonzero leakage reactance of the secondary, longitudinal, and transverse end effects into consideration. Firstly, the traditional equivalent circuit with longitudinal and transverse end effects are briefly reviewed. Additionally, the correction coefficients for longitudinal and transverse end effects derived by one-dimensional analysis models are given. Secondly, correction factors for skin effect, which reflects the inhomogeneous air gap magnetic field vertically, and the secondary leakage reactance are derived by the quasi-two-dimensional analysis model. Then, the proposed equivalent circuit is presented, and the excitation reactance and secondary resistance are modified by the correction coefficients derived from the three analytical models. Finally, a three-dimensional (3D) finite element model is used to verify the proposed equivalent circuit model under varying air gap width and frequency, and the results are also compared with that of the traditional equivalent circuit models. The calculated thrust characteristics by the proposed equivalent circuit and 3D finite element model are experimentally validated under a constant voltage–frequency drive.

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