Frequency-domain uniform asymptotic solution for scattered electric field by a 2-D coated conducting cylinder covered with a thin lossy medium

Uniformly asymptotic frequency-domain solutions for a class of hyperbolic equations with singular convolution operators are derived. Asymptotic solutions for this class of equations involve additional parameters — called attenuation parameters — which control the smoothing of the wavefield at the wavefront. At caustics the ray amplitudes have a singularity associated with vanishing of ray spreading and with divergence of an integral controlling the rate of exponential amplitude decay. Both problems are resolved by applying a generalized Kravtsov–Ludwig formula derived in this paper. A different asymptotic solution is constructed in the case of separation of dispersion and focusing effects.

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Calculation of the Transient Electric Field Transmitted in a Lossy Medium Radiated by an Equivalent GPR Dipole Antenna

2018 17th International Conference on Ground Penetrating Radar (GPR) ◽

10.1109/icgpr.2018.8441591 ◽

2018 ◽

Author(s):

Silvestar Sesnic ◽

Dragan Poljak

Keyword(s):

Electric Field ◽

Dipole Antenna ◽

Lossy Medium ◽

Transient Electric Field

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Study on transient scattered electric field from a coated conducting cylinder covered with a thin lossy dielectric material excited by UWB pulse wave

2015 International Conference on Electromagnetics in Advanced Applications (ICEAA) ◽

10.1109/iceaa.2015.7297110 ◽

2015 ◽

Cited By ~ 1

Author(s):

K. Goto ◽

T. Santikul ◽

R. Asai ◽

N. Sumikawa

Keyword(s):

Electric Field ◽

Pulse Wave ◽

Dielectric Material ◽

Conducting Cylinder ◽

Lossy Dielectric

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SOA-fiber ring laser and its application to electric field sensing in frequency domain

Optics and Lasers in Engineering ◽

10.1016/j.optlaseng.2006.12.002 ◽

2007 ◽

Vol 45 (7) ◽

pp. 789-794 ◽

Cited By ~ 5

Author(s):

T. Suemune ◽

Y. Takahashi

Keyword(s):

Electric Field ◽

Frequency Domain ◽

Ring Laser ◽

Fiber Ring Laser ◽

Fiber Ring ◽

Electric Field Sensing ◽

Field Sensing

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PERFORMANCE ANALYSIS OF AN ENGINE MOUNT FEATURING ER FLUIDS AND PIEZOACTUATORS

International Journal of Modern Physics B ◽

10.1142/s0217979296001586 ◽

1996 ◽

Vol 10 (23n24) ◽

pp. 3143-3157 ◽

Cited By ~ 28

Author(s):

S.H. CHOI ◽

Y.T. CHOI ◽

S.B. CHOI ◽

C.C. CHEONG

Keyword(s):

Electric Field ◽

Frequency Domain ◽

Control Technique ◽

Operating Frequency ◽

Frequency Range ◽

Engine Mounts ◽

Operating Frequency Range ◽

Engine Mount ◽

Er Fluids ◽

Er Fluid

Conventional rubber mounts and various types of passive or semi-active hydraulic engine mounts for a passenger vehicle have their own functional aims on the limited frequency band in the broad engine operating frequency range. In order to achieve high system performance over all frequency ranges of the engine operation, a new type of engine mount featuring electro-rheological(ER) fluids and piezoactuators is proposed in this study. A mathematical model of the proposed engine mount is derived using the bond graph method which is inherently adequate to model the interconnected hydromechanical system. In the low frequency domain, the ER fluid is activated upon imposing an electric field for vibration isolation while the piezoactuator is activated in the high frequency domain. A neuro-control algorithm is utilized to determine control electric field for the ER fluid, and H∞ control technique is adopted for the piezoactuator Comparative works between the proposed and single-actuating(ER fluid only or piezoactuator only) engine mounts are undertaken by evaluating force transmissibility over a wide operating frequency range.

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