Traveling Electromagnetic Waves on Linear Periodic Arrays of Small Lossless Penetrable Spheres

2004 ◽  
Author(s):  
Robert A. Shore ◽  
Arthur D. Yaghjian
Keyword(s):  
Electromagnetic Waves ◽  
Periodic Arrays ◽  
Penetrable Spheres

scholarly journals Manufacture of electrical and magnetic graded and anisotropic materials for novel manipulations of microwaves

2015 ◽  
Vol 373 (2049) ◽  
pp. 20140353 ◽  
Author(s):  
P. S. Grant ◽  
F. Castles ◽  
Q. Lei ◽  
Y. Wang ◽  
J. M. Janurudin ◽  
...  
Keyword(s):  
Electromagnetic Waves ◽  
Spray Deposition ◽  
Electromagnetic Properties ◽  
Additive Manufacture ◽  
Practical Implementation ◽  
Spatial Transformations ◽  
Periodic Arrays ◽  
Electrical And Magnetic Properties ◽  
Properties Of Materials ◽  
Applied Fields

Spatial transformations (ST) provide a design framework to generate a required spatial distribution of electrical and magnetic properties of materials to effect manipulations of electromagnetic waves. To obtain the electromagnetic properties required by these designs, the most common materials approach has involved periodic arrays of metal-containing subwavelength elements. While aspects of ST theory have been confirmed using these structures, they are often disadvantaged by narrowband operation, high losses and difficulties in implementation. An all-dielectric approach involves weaker interactions with applied fields, but may offer more flexibility for practical implementation. This paper investigates manufacturing approaches to produce composite materials that may be conveniently arranged spatially, according to ST-based designs. A key aim is to highlight the limitations and possibilities of various manufacturing approaches, to constrain designs to those that may be achievable. The article focuses on polymer-based nano- and microcomposites in which interactions with microwaves are achieved by loading the polymers with high-permittivity and high-permeability particles, and manufacturing approaches based on spray deposition, extrusion, casting and additive manufacture.

scholarly journals Guided electromagnetic waves for periodic arrays of thin metallic wires near an interface between two dielectric media

2019 ◽  
Vol 475 (2227) ◽  
pp. 20180399 ◽  
Author(s):  
V. V. Zalipaev ◽  
S. Yu. Kosulnikov
Keyword(s):  
Electromagnetic Waves ◽  
Dielectric Medium ◽  
Periodic Arrays ◽  
Resonance Modes ◽  
Wave Resonance ◽  
Incident Plane ◽  
Excited Wave ◽  
Half Wave ◽  
Resonance Frequencies ◽  
Metallic Wires

Guided localized electromagnetic waves propagating along one-dimensional (1D) arrays of thin metallic parallel wires, finite and infinite, are studied. The arrays are embedded into the upper dielectric half-space close to the interface separating it from the lower dielectric medium with different permittivity and the same permeability. Firstly, a dependence of resonance frequencies of excited wave modes for finite array with respect to the array height above the interface is studied. The array is excited by a normally incident plane wave. It is important that the order of the resonance modes changes if the distance between the array and the interface becomes small. An analysis, based on the Pocklington system of integral equations to evaluate resonance frequencies and compute the fields of excited modes above the array, was applied. This approach is based on the longwave approximation of thin wires. Secondly, the waves propagating along infinite 1D array of thin metallic wires that is close to the interface are studied. Dispersion curves are presented for the lowest case of half-wave resonance for different heights of the array over the interface. When the array approaches very close to the interface an anomalous dispersion is observed. The results of the numerical analysis were tested against computations obtained by means of other independent CST Studio Suite simulations.

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