Equivalent circuits for transformers based on one-dimensional propagation: accounting for multilayer structure of windings and ferrite losses

2000 ◽  
Vol 36 (5) ◽  
pp. 3778-3784 ◽  
Author(s):  
A. Schellmanns ◽  
P. Fouassier ◽  
J.-P. Keradec ◽  
J.-L. Schanen
Keyword(s):  
Multilayer Structure ◽  
Equivalent Circuits ◽  
One Dimensional

Effects of the Multilayer Structure on the Responsivity of Pyroelectric Thin Film Detectors

1994 ◽  
Vol 360 ◽  
Author(s):  
Zhu Jianguo ◽  
Xiao Dingquan ◽  
Qian Zhenghong ◽  
Zhang Wen ◽  
Du Siaosong
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Integrated Circuit ◽  
Multilayer Structure ◽  
Modulation Frequency ◽  
Flow Equation ◽  
One Dimensional ◽  
The One ◽  
Direct Incorporation ◽  
Room Temperature Operation

AbstractPyroelectric thin film detectors have advantages of wavelength independent sensitivity, room temperature operation and direct incorporation with integrated circuit amplifiers. Pyroelectric thin films with good quality have be prepared by many advanced thin film technologies [1-2]. The responsivity of pyroelectric thin film detectors is dependent on the thermal properties of the substrate, on which pyroelectric thin film detectors are prepared. The heat conduction in the detectors was investigated using the one-dimensional heat flow equation and the expressions describing the detectors performance were derived for pyroelectric thin films detectors with multilayer structure. The numerical simulation showed that the pyroelectric thin film detectors need effective heat isolation. If the air gap could be the heat isolation layer, which is between the bottom electrode and substrate, the iesponsivity of detectors would be higher than that of detectors which have no heat isolation in certain modulation frequency range.

scholarly journals Analysis of Coupled Surface Plasmon in LHM Mediated Dielectric Gap Multilayer Structure

2019 ◽  
Vol 10 (2) ◽  
pp. 113-122
Author(s):  
Mohammed Bendjebbour ◽  
Abdellatif Cherifi ◽  
Benamar Bouhafs
Keyword(s):  
Surface Plasmons ◽  
Surface Plasmon ◽  
Multilayer Structure ◽  
Reflectance Spectra ◽  
Total Thickness ◽  
Optimum Conditions ◽  
One Dimensional ◽  
Left Handed ◽  
Resonant Modes

AbstractThe purpose of this work is to investigate theoretically the characteristics of confined electromagnetic modes propagating along the interfaces of a multilayer device. This one dimensional (ID) sensor is formed by stacking a left-handed material (LHM) layer between a SiCt2-glass prism and a dielectric gap layer in contact with gold (Au). The results indicate that the total thickness of the LHM layer and dielectric gap, in optimum conditions, give the ability of tuning significantly the characteristics of the resonant modes correlated to surface plasmons (SPs) propagation along the interfaces of the designed device. By considering two arrangements between LHM and Au, two opposite resonant behaviors observed in p-reflectance spectra are analyzed in the angular interrogation mode and discussed thoroughly.

Theoretical study on the photonic band gap in one-dimensional photonic crystals with graded multilayer structure

2013 ◽  
Vol 22 (7) ◽  
pp. 074211 ◽  
Author(s):  
Chun-Zhen Fan ◽  
Jun-Qiao Wang ◽  
Jin-Na He ◽  
Pei Ding ◽  
Er-Jun Liang
Keyword(s):  
Photonic Crystals ◽  
Band Gap ◽  
Multilayer Structure ◽  
Theoretical Study ◽  
Photonic Band Gap ◽  
One Dimensional ◽  
Photonic Band

Modeling acoustic resonators using higher-order equivalent circuits

2019 ◽  
Vol 67 (6) ◽  
pp. 456-466
Author(s):  
Caleb B. Goates ◽  
Mathew F. Calton ◽  
Scott D. Sommerfeldt ◽  
David C. Copley
Keyword(s):  
Higher Order ◽  
Side Branch ◽  
Equivalent Circuits ◽  
One Dimensional ◽  
Acoustic Resonators ◽  
Helmholtz Resonators ◽  
Lumped Element ◽  
Classical Models ◽  
The One ◽  
Dimensional Wave

Helmholtz resonators are widely used, but classical models for the resonators, such as the lumped-element equivalent circuit, are inaccurate for most geometries. This article presents higher-order equivalent circuits for describing the resonators based on the one-dimensional wave equation. Impedance expressions are also derived. These circuits and expressions are given for various constituent resonator components, which may be combined to model resonators with curved, tapered, and straight necks. Resonance frequency predictions using this theory are demonstrated on two realistic resonators. The higher-order predictions are also applied to the theory of side branch attenuators in a duct and the theory of resonator coupling with a mode of an enclosure.

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