Controllable wave propagation of hybrid dispersive medium with LC high-pass network (Conference Presentation)

2017 ◽  
Author(s):  
Edgar Flores Parra ◽  
Andrea E. Bergamini ◽  
Paolo Ermanni
Keyword(s):  
Wave Propagation ◽  
Dispersive Medium ◽  
High Pass

Elastic Wave Propagation from Point Excitations on Thin-Walled Cylindrical Shells

1990 ◽  
Vol 112 (3) ◽  
pp. 399-406 ◽  
Author(s):  
A. D. Pierce ◽  
Hyun-Gwon Kil
Keyword(s):  
Wave Propagation ◽  
Dispersive Medium ◽  
Circular Cylindrical Shell ◽  
Exciting Force ◽  
Cylinder Surface ◽  
Two Dimensional ◽  
Phase Velocities ◽  
Unbounded Medium ◽  
Thin Walled ◽  
Analytical Expressions

The circular cylindrical shell is described by equations that govern wave propagation in a two-dimensional homogeneous, but anisotropic and dispersive, medium. The idealization of an unbounded medium is applicable if the source is replaced by a periodic array of forces, the repetition distance being the cylinder circumference. Analytical expressions and calculations are presented for wavefront patterns, amplitude distributions, polarizations, and phase velocities for waves on the cylinder surface. The analysis includes all three possible directions of the exciting force and gives fundamental results that can be superimposed to predict vibration fields resulting from arbitrary excitations.

scholarly journals On precursors of electromagnetic wave propagation

1979 ◽  
Vol 89 ◽  
pp. 357-369
Author(s):  
F. K. Brunner
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Electromagnetic Wave Propagation ◽  
Dispersive Medium ◽  
Atmospheric Effects ◽  
Optical Frequency ◽  
Frequency Range ◽  
Optical Frequency Range

The precursor theory of an electromagnetic wavetrain propagating through a dispersive medium is briefly reviewed. The few successful experimental determinations of these precursors, which have been reported in the literature, are limited to transients in waveguides. The determination of precursors in the optical frequency range appears to be achievable in the laboratory. However, in the geodetic context of long wavepaths through the troposphere the utilisation of precursors for measuring distances and directions free of atmospheric effects is judged as not feasible at the present time.

scholarly journals Propagation in Diagonal Anisotropic Chirowaveguides

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
S. Aib ◽  
F. Benabdelaziz ◽  
C. Zebiri ◽  
D. Sayad
Keyword(s):  
Wave Propagation ◽  
Slow Wave ◽  
Theoretical Study ◽  
Constitutive Relations ◽  
Physical Parameters ◽  
Fast Wave ◽  
Negative Constant ◽  
Wave Region ◽  
Constitutive Parameters ◽  
High Pass

A theoretical study of electromagnetic wave propagation in parallel plate chirowaveguide is presented. The waveguide is filled with a chiral material having diagonal anisotropic constitutive parameters. The propagation characterization in this medium is based on algebraic formulation of Maxwell’s equations combined with the constitutive relations. Three propagation regions are identified: the fast-fast-wave region, the fast-slow-wave region, and the slow-slow-wave region. This paper focuses completely on the propagation in the first region, where the dispersion modal equations are obtained and solved. The cut-off frequencies calculation leads to three cases of the plane wave propagation in anisotropic chiral medium. The particularity of these results is the possibility of controlling the appropriate cut-off frequencies by choosing the adequate physical parameters values. The specificity of this study lies in the bifurcation modes confirmation and the possible contribution to the design of optical devices such as high-pass filters, as well as positive and negative propagation constants. This negative constant is an important feature of metamaterials which shows the phenomena of backward waves. Original results of the biaxial anisotropic chiral metamaterial are obtained and discussed.

scholarly journals Controllable wave propagation of hybrid dispersive media with LC high-pass and band-pass networks

2017 ◽  
Vol 110 (18) ◽  
pp. 184103 ◽  
Author(s):  
Edgar A. Flores Parra ◽  
Andrea Bergamini ◽  
Bart Van Damme ◽  
Paolo Ermanni
Keyword(s):  
Wave Propagation ◽  
Dispersive Media ◽  
Band Pass ◽  
High Pass
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