Resonance Transmission of Dual Plates with Narrow Small Slots due to Two Parallel Wires for Frequencies around 2 GHz

This paper presents the transmission cross-section (TCS) of a dual plate with narrow small slots when a plane wave is incident from the left half-space. Numerical results show that the TCS depends mainly on the plate spacing for a specified frequency. The TCS fluctuates with the plate spacing; the fluctuation period is approximately 0.5λ. When the plate spacing is larger than 0.5λ, the TCS reduces to 90% in the single plate case, and TCS enhancement is extremely difficult. However, when the plate spacing is less than 0.5λ, the TCS decreases gradually to approximately 36% in the single plate case, and TCS enhancement can be realized using two parallel wires. The analysis results show that resonance transmission is effectively obtained by the wires connected on the slots for a plate spacing within 0.5λ. Experimental measurements are presented to validate the theory.

Download Full-text

An exact line integral representation of the physical optics radiation from a perfectly conducting cylindrical reflector of arbitrary cross section illuminated by a plane wave

2nd European Conference on Antennas and Propagation (EuCAP 2007) ◽

10.1049/ic.2007.1580 ◽

2007 ◽

Author(s):

A. Vallecchi

Keyword(s):

Plane Wave ◽

Integral Representation ◽

Cross Section ◽

Arbitrary Cross Section ◽

Physical Optics ◽

Line Integral ◽

Cylindrical Reflector

Download Full-text

The Computation of the Magnitude of the Far Field for an Eccentric Circular Cylinder

Advances in Mathematical Physics ◽

10.1155/2015/282601 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8

Author(s):

Bülent Yılmaz

Keyword(s):

Circular Cylinder ◽

Plane Wave ◽

Radiation Condition ◽

Higher Order ◽

Numerical Results ◽

Surface Radiation ◽

Far Field ◽

Condition Method ◽

Radiation Conditions

The specific case of scattering of a plane wave by a two-layered penetrable eccentric circular cylinder has been considered and it is about the validity of the on surface radiation condition method and its applications to the scattering of a plane wave by a two-layered penetrable eccentric circular cylinder. The transformation of the problem of scattering by the eccentric circular cylinder to the problem of scattering by the concentric circular cylinder by using higher order radiation conditions, is observed. Numerical results presented the magnitude of the far field.

Download Full-text

Solution of Navier’s Equation in Cylindrical Curvilinear Coordinates

Journal of Applied Mechanics ◽

10.1115/1.3424424 ◽

1978 ◽

Vol 45 (4) ◽

pp. 812-816 ◽

Cited By ~ 1

Author(s):

B. S. Berger ◽

B. Alabi

Keyword(s):

Fourier Transform ◽

Finite Difference ◽

Boundary Conditions ◽

Half Space ◽

Coordinate Transformation ◽

Numerical Results ◽

Three Dimensions ◽

Curvilinear Coordinates ◽

Rectangular Region

A solution has been derived for the Navier equations in orthogonal cylindrical curvilinear coordinates in which the axial variable, X3, is suppressed through a Fourier transform. The necessary coordinate transformation may be found either analytically or numerically for given geometries. The finite-difference forms of the mapped Navier equations and boundary conditions are solved in a rectangular region in the curvilinear coordinaties. Numerical results are given for the half space with various surface shapes and boundary conditions in two and three dimensions.

Download Full-text

Analysis of Twisting Stiffness for a Multifiber Composite Layer

Journal of Applied Mechanics ◽

10.1115/1.3423366 ◽

1974 ◽

Vol 41 (3) ◽

pp. 658-662 ◽

Cited By ~ 4

Author(s):

C. W. Bert ◽

S. Chang

Keyword(s):

Cross Section ◽

Least Squares Method ◽

Rectangular Cross Section ◽

Torsional Rigidity ◽

Composite Layer ◽

Circular Cross Section ◽

Relaxation Method ◽

Fiber Composites ◽

Numerical Results ◽

Torsion Problem

The twisting stiffness of a rectangular cross section consisting of a single row of solid circular cross-section fibers embedded in a matrix is analyzed. The problem is formulated as a Dirichlet torsion problem of a multielement region and solved by the boundary-point least-squares method. Numerical results for a single-fiber square cross section compare favorably with previous relaxation-method results. New numerical results for three and five-fiber composites suggest that the torsional rigidity of a multifiber composite can be approximated from the torsional rigidities of single and three-fiber models.

Download Full-text

Corrections to the Thomson cross section caused by relativistic effects and by the presence of the drift velocity of a classical charged particle in the field of a monochromatic plane wave

JETP Letters ◽

10.1134/s0021364017060108 ◽

2017 ◽

Vol 105 (6) ◽

pp. 388-394

Author(s):

A. V. Perestoronin

Keyword(s):

Charged Particle ◽

Plane Wave ◽

Cross Section ◽

Drift Velocity ◽

Relativistic Effects

Download Full-text

Free Vibration of Thin-Walled Open Section Beams With Unconstrained Damping Treatment

Journal of Applied Mechanics ◽

10.1115/1.3157561 ◽

1981 ◽

Vol 48 (1) ◽

pp. 169-173 ◽

Cited By ~ 7

Author(s):

S. Narayanan ◽

J. P. Verma ◽

A. K. Mallik

Keyword(s):

Free Vibration ◽

Cross Section ◽

Transverse Vibration ◽

Natural Frequencies ◽

Vibration Characteristics ◽

Numerical Results ◽

Simply Supported ◽

Clamped Beams ◽

Thin Walled ◽

Open Cross Section

Free-vibration characteristics of a thin-walled, open cross-section beam, with unconstrained damping layers at the flanges, are investigated. Both uncoupled transverse vibration and the coupled bending-torsion oscillations, of a beam of a top-hat section, are considered. Numerical results are presented for natural frequencies and modal loss factors of simply supported and clamped-clamped beams.

Download Full-text

Subsurface and Surface Cracking Due to Hertzian Contact

Journal of Lubrication Technology ◽

10.1115/1.3253217 ◽

1982 ◽

Vol 104 (3) ◽

pp. 347-351 ◽

Cited By ~ 101

Author(s):

L. M. Keer ◽

M. D. Bryant ◽

G. K. Haritos

Keyword(s):

Crack Propagation ◽

Half Space ◽

Elastic Half Space ◽

Contact Stresses ◽

Numerical Results ◽

Hertzian Contact ◽

Vertical Crack ◽

Subsurface Crack ◽

Surface Cracking ◽

Crack Geometry

Numerical results are presented for a cracked elastic half-space surface-loaded by Hertzian contact stresses. A horizontal subsurface crack and a surface breaking vertical crack are contained within the half-space. An attempt to correlate crack geometry to fracture is made and possible mechanisms for crack propagation are introduced.

Download Full-text

On the Torsion of Elastic Half Spaces With Embedded Penny-Shaped Flaws

Journal of Applied Mechanics ◽

10.1115/1.3422789 ◽

1972 ◽

Vol 39 (3) ◽

pp. 786-790 ◽

Cited By ~ 4

Author(s):

R. D. Low

Keyword(s):

Integral Equations ◽

Half Space ◽

Rigid Inclusion ◽

Elastic Half Space ◽

Numerical Results ◽

Fredholm Integral Equations ◽

Graphical Displays ◽

Penny Shaped Crack ◽

Shaped Crack

The investigation is concerned with some of the effects of embedded flaws in an elastic half space subjected to torsional deformations. Specifically two types of flaws are considered: (a) a penny-shaped rigid inclusion, and (b) a penny-shaped crack. In each case the problem is reduced to a system of Fredholm integral equations. Graphical displays of the numerical results are included.

Download Full-text