Dielectric Property Study of Bacillus cereus Spores at Microwave Frequency Region

The classical electromagnetically-induced transparency (EIT)-like switching in metamaterials was experimentally demonstrated in the microwave-frequency region. The metameterial unit cell consists of two identical split-ring resonators, which are arranged on both sides of a dielectric substrate with 90°-rotation asymmetry. In our scheme, the classical EIT-like switching can be achieved by changing the polarization of the incident electromagnetic wave.

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CIDEP measurement in the L band microwave frequency region. Hyperfine-independent versus hyperfine-dependent mechanisms in the ST_mixing of acetone in 2-propanol

Chemical Physics Letters ◽

10.1016/0009-2614(94)00541-9 ◽

1994 ◽

Vol 224 (1-2) ◽

pp. 95-100 ◽

Cited By ~ 5

Author(s):

Masahide Terazima ◽

Yuji Miura ◽

Keishi Ohara ◽

Noboru Hirota

Keyword(s):

Microwave Frequency ◽

Frequency Region ◽

L Band

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Experiments of Negative-Index Refraction in Optical Frequency Region

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.437.575 ◽

2010 ◽

Vol 437 ◽

pp. 575-579

Author(s):

Jia Bi Chen ◽

Bin Ming Liang ◽

Da Wei Zhang ◽

Song Lin Zhuang

Keyword(s):

Photonic Crystal ◽

Smart Materials ◽

Microwave Frequency ◽

Frequency Region ◽

Optical Frequency ◽

Negative Index ◽

Transmitted Beam ◽

Negative Index Materials ◽

New Class ◽

Significant Attention

Recently, significant attention has been devoted to a new class of smart materials – so-called negative-index materials (NIM). There are some direct experimental demonstrations of NIM in the microwave frequency region, but not in optical frequency region. Here we report a kind of optical negative-index material which is 2D photonic crystal and, by measuring the refractive angle of the transmitted beam through a prism fabricated from this material, we determine the effective n. These experiments directly confirm this material is an optical negative-index one.

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A Modified Formula for Calculating Dielectric Properties of Granular Agricultural Products in the Microwave Band

E3S Web of Conferences ◽

10.1051/e3sconf/202124501002 ◽

2021 ◽

Vol 245 ◽

pp. 01002

Author(s):

Runeng Zhong ◽

Qinhong Zheng ◽

Bin Yao ◽

Tai Xiang

Keyword(s):

Dielectric Properties ◽

Dielectric Property ◽

Measurement Data ◽

Microwave Frequency ◽

Effective Medium ◽

Agricultural Products ◽

Theoretical Formula ◽

Characteristic Parameters ◽

Microwave Band ◽

Modified Formula

Dielectric properties are important characteristic parameters in the microwave-assisted application of hygroscopic agricultural media. To break through the limitation of traditional general effective medium (GEM) formula and develop the new calculation formula suitable for agricultural products, a modified formula, that is, modified general agricultural products effective medium (abbreviated as MGAPEM) formula, was presented in this study for the dielectric property calculation of granular agricultural products in the microwave band. The correctness, validity, and accuracy of MGAPEM formula were verified by using literature and experimental measurement data. Results show that the maximum errors of the dielectric constant and dielectric loss factor are 0.42% and 0.98%, respectively, in the conditions of microwave frequency (2.0–12.2 Ghz) and moisture content (2.0%-19.7%, wet basis). The accuracy of MGAPEM is higher than some traditional theoretical formulas. The MGAPEM formula provides a theoretical formula for the dielectric property analysis of granular agricultural products in the microwave band at room temperature (24℃).

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