scholarly journals Electromagnetic Reciprocal Cloak with Only Axial Material Parameter Spatially Variant

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Jing Jing Yang ◽  
Ming Huang ◽  
Fu Chun Mao ◽  
Guang Hui Cai ◽  
Yao Zhong Lan
Keyword(s):  
Electromagnetic Compatibility ◽  
Material Parameter ◽  
Transformation Optics ◽  
Sensor Design ◽  
Electromagnetic Irradiation ◽  
Wave Simulation ◽  
Full Wave ◽  
Axial Parameter ◽  
Parameter Varying ◽  
Spatially Variant

Reciprocal cloak is an intriguing metamaterial device, in which a hidden antenna or a sensor can receive electromagnetic irradiation from the outside but its presence will not be detected. Based on transformation optics, a cylindrical electromagnetic reciprocal cloak with only axial parameter varying with radius is designed and validated by full wave simulation. When two dispersive reciprocal cloaks are put together, they do not interfere with each other. Our work demonstrates the electromagnetic compatibility (EMC) ability of the reciprocal cloak which is very important in multi antenna and sensor design.

AN EXTERNAL CYLINDRICAL CLOAK WITH N-SIDED REGULAR POLYGONAL CROSS-SECTION BASED ON COMPLEMENTARY MEDIUM

2010 ◽  
Vol 24 (22) ◽  
pp. 2365-2376 ◽  
Author(s):  
CHENGFU YANG ◽  
MING HUANG ◽  
JINGJING YANG ◽  
ZHE XIAO ◽  
JINHUI PENG
Keyword(s):  
Cross Section ◽  
Arbitrary Shape ◽  
Transformation Optics ◽  
Frequency Range ◽  
Material Parameters ◽  
Electromagnetic Irradiation ◽  
Wave Simulation ◽  
Full Wave ◽  
External Cloaking

An electromagnetic cloak is a device which makes an object "invisible" for electromagnetic irradiation in a certain frequency range. Material parameters for the complementary medium-assisted external cylindrical cloak with N-sided regular polygonal cross-section are derived based on combining the concepts of complementary media and transformation optics. It can make the object with an arbitrary shape outside the cloaking domain invisible, as long as an "anti-object" is embedded in the complementary layer. The external cloaking effect has been verified by full-wave simulation.

A SIMPLIFIED PARAMETER DESIGN METHOD FOR TRANSFORMATION OPTICS-BASED METAMATERIAL INNOVATIVE CLOAK

2013 ◽  
Vol 27 (27) ◽  
pp. 1350148 ◽  
Author(s):  
TING-HUA LI ◽  
MING HUANG ◽  
JING-JING YANG ◽  
JIN LU ◽  
HUI-LU CAO
Keyword(s):  
Feasible Solution ◽  
Design Method ◽  
Singular Values ◽  
Transformation Optics ◽  
Parameter Design ◽  
Material Parameters ◽  
Full Wave ◽  
Axial Parameter ◽  
Spatially Varying ◽  
Parameter Deviation

Transformation optics-based innovative cloak which combines the virtues of both internal and external cloaks to enable arbitrary multi-objects hidden with visions and movements was first proposed by Huang et al. [Appl. Phys. Lett.101, 151901 (2012)]. But it is rather difficult to implement in practice, for the required material parameters vary with radius and even have singular values. To accelerate its practical realization but still keep good performance of invisibility, a simplified innovative cloak with only spatially varying axial parameter is developed via choosing appropriate transformation function. The advantage of such a cloak is that both radial and azimuthal parameters are constants, and all three components are nonsingular and finite. Full-wave simulation confirms the perfect cloaking effect of the cloak. Besides, the influences of metamaterials loss and parameter deviation on the performance of cloak are also investigated. This work provides a simple and feasible solution to push metamaterial-assisted innovative cloak more closely to the practice.

Full wave simulation of lower hybrid current drive in tokamaks

1997 ◽  
Author(s):  
Yves Peysson ◽  
Eric Sébelin ◽  
Xavier Litaudon ◽  
Didier Moreau ◽  
Jean-Claude Miellou ◽  
...  
Keyword(s):  
Current Drive ◽  
Lower Hybrid ◽  
Wave Simulation ◽  
Full Wave ◽  
Lower Hybrid Current Drive

A Mesh-Free Particle Method for Transient Full-Wave Simulation

2007 ◽  
Vol 43 (4) ◽  
pp. 1333-1336 ◽  
Author(s):  
Guido Ala ◽  
Elisa Francomano ◽  
Adele Tortorici ◽  
Elena Toscano ◽  
Fabio Viola
Keyword(s):  
Free Particle ◽  
Particle Method ◽  
Wave Simulation ◽  
Full Wave ◽  
Mesh Free
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