Journal
AIP ADVANCES
Volume 8, Issue 1, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5006960
Keywords
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Funding
- Japanese Ministry of Education, Culture, Sport, Science and Technology, Japan
- Strategic Information and Communication R&D Promotion Programme (SCOPE) from the Ministry of Internal Affairs and Communication, Japan
- Grants-in-Aid for Scientific Research [26246035] Funding Source: KAKEN
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Limitation of the cloak-size reduction is investigated numerically by a finite-difference time-domain (FDTD) method. A metallic pole that imitates an antenna is cloaked with an anisotropic and parameter-gradient medium against electromagnetic-wave propagation in microwave range. The cloaking structure is a metamaterial submerged in a plasma confined in a vacuum chamber made of glass. The smooth-permittivity plasma can be compressed in the radial direction, which enables us to decrease the size of the cloak. Theoretical analysis is performed numerically by comparing scattering waves in various cases; there exists a high reduction of the scattering wave when the radius of the cloak is larger than a quarter of one wavelength. This result indicates that the required size of the cloaking layer is more than an object scale in the Rayleigh scattering regime. (c) 2017 Author(s).
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