A Novel Cavity with Size-Independent Resonant Frequency Realized by Left-Handed Material

2006 ◽  
Author(s):  
Yao Chin ◽  
Tie Jun Cui ◽  
Qiang Cheng ◽  
Yuhua Yao
Keyword(s):  
Resonant Frequency ◽  
Left Handed

scholarly journals The relationship between resonant frequency band and cell size in left-handed materials

2009 ◽  
Vol 58 (6) ◽  
pp. 3844
Author(s):  
Wu Jun-Fang ◽  
Sun Ming-Zhao ◽  
Zhang Chun-Min
Keyword(s):  
Resonant Frequency ◽  
Cell Size ◽  
Frequency Band ◽  
Left Handed ◽  
The Relationship

Shift Resonant Frequency by Changing Space Between Layers in Left-handed Materials*

2010 ◽  
Vol 39 (7) ◽  
pp. 1181-1185
Author(s):  
吴俊芳 WU Jun-fang ◽  
刘汉臣 LIU Han-chen
Keyword(s):  
Resonant Frequency ◽  
Left Handed

A novel composite right/left-handed transmission line with zero-order resonant frequency

2009 ◽  
Vol 51 (6) ◽  
pp. 1592-1595 ◽  
Author(s):  
Ya-Nan Zhang ◽  
Di Wu ◽  
Hongbo Zhu ◽  
Bing-Hui Chen
Keyword(s):  
Resonant Frequency ◽  
Transmission Line ◽  
Zero Order ◽  
Left Handed

scholarly journals Influence of left-handed material on the resonant frequency of resonant cavity

2015 ◽  
Vol 64 (12) ◽  
pp. 124103
Author(s):  
Li Pei ◽  
Wang Fu-Zhong ◽  
Zhang Li-Zhu ◽  
Zhang Guang-Lu
Keyword(s):  
Resonant Frequency ◽  
Resonant Cavity ◽  
Left Handed

scholarly journals High-Precision Complementary Metamaterial Sensor Using Slotted Microstrip Transmission Line

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Abdul Samad ◽  
Wei Dong Hu ◽  
Waseem Shahzad ◽  
Leo. P. Ligthart ◽  
Hamid Raza
Keyword(s):  
Dielectric Properties ◽  
Resonant Frequency ◽  
Transmission Line ◽  
Dielectric Materials ◽  
Compact Structure ◽  
Microstrip Transmission Line ◽  
Left Handed ◽  
Microwave Sensor ◽  
Constitutive Parameters

Metamaterial-based microwave sensor having novel and compact structure of the resonators and the slotted microstrip transmission line is proposed for highly precise measurement of dielectric properties of the materials under test (MUTs). The proposed sensor is designed and simulated on Rogers’ substrate RO4003C by using the ANSYS HFSS software. A single and accumulative notch depth of -44.29 dB in the transmission coefficient ( S 21 ) is achieved at the resonant frequency of 5.15 GHz. The negative constitutive parameters (permittivity and permeability) are extracted from the S -parameters which are the basic property of metamaterials or left handed materials (LHMs). The proposed sensor is fabricated and measured through the PNA-X (N5247A). The sensitivity analysis is performed by placing various standard dielectric materials onto the sensor and measuring the shift in the resonant frequencies of the MUTs. A parabolic equation of the proposed sensor is formulated to approximate the resonant frequency and the relative permittivity of the MUTs. A very strong agreement among the simulated, measured, and calculated results is found which reveals that the proposed sensor is a highly precise sensor for the characterization of dielectric properties of the MUTs. Error analysis is performed to determine the accuracy of the proposed sensor. A very small percentage of error (0.81%) and a very low standard deviation are obtained which indicate high accuracy of the proposed sensor.

Single molecule optical diffraction: A tool for understanding the structure of triple stranded left-hand helical cellulose

1989 ◽  
Vol 47 ◽  
pp. 1024-1025
Author(s):  
George C. Ruben ◽  
William Krakow
Keyword(s):  
Single Molecule ◽  
Helical Structure ◽  
Optical Diffraction ◽  
Maximum Diameter ◽  
Primary Cell Wall ◽  
Cellulose Synthesis ◽  
Left Hand ◽  
Left Handed ◽  
Freeze Dried ◽  
Diffraction Patterns

Tobacco primary cell wall and normal bacterial Acetobacter xylinum cellulose formation produced a 36.8±3Å triple-stranded left-hand helical microfibril in freeze-dried Pt-C replicas and in negatively stained preparations for TEM. As three submicrofibril strands exit the wall of Axylinum , they twist together to form a left-hand helical microfibril. This process is driven by the left-hand helical structure of the submicrofibril and by cellulose synthesis. That is, as the submicrofibril is elongating at the wall, it is also being left-hand twisted and twisted together with two other submicrofibrils. The submicrofibril appears to have the dimensions of a nine (l-4)-ß-D-glucan parallel chain crystalline unit whose long, 23Å, and short, 19Å, diagonals form major and minor left-handed axial surface ridges every 36Å.The computer generated optical diffraction of this model and its corresponding image have been compared. The submicrofibril model was used to construct a microfibril model. This model and corresponding microfibril images have also been optically diffracted and comparedIn this paper we compare two less complex microfibril models. The first model (Fig. 1a) is constructed with cylindrical submicrofibrils. The second model (Fig. 2a) is also constructed with three submicrofibrils but with a single 23 Å diagonal, projecting from a rounded cross section and left-hand helically twisted, with a 36Å repeat, similar to the original model (45°±10° crossover angle). The submicrofibrils cross the microfibril axis at roughly a 45°±10° angle, the same crossover angle observed in microflbril TEM images. These models were constructed so that the maximum diameter of the submicrofibrils was 23Å and the overall microfibril diameters were similar to Pt-C coated image diameters of ∼50Å and not the actual diameter of 36.5Å. The methods for computing optical diffraction patterns have been published before.

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