Adjusting the resonant frequency and loss of dendritic left-handed metamaterials with fractal dimension

2009 ◽  
Vol 106 (9) ◽  
pp. 093511 ◽  
Author(s):  
Weiren Zhu ◽  
Xiaopeng Zhao
Keyword(s):  
Fractal Dimension ◽  
Resonant Frequency ◽  
Left Handed

IMPACT OF FRACTAL DIMENSION IN THE DESIGN OF MULTI-RESONANT FRACTAL ANTENNAS

Fractals ◽  
2004 ◽  
Vol 12 (01) ◽  
pp. 55-66 ◽  
Author(s):  
K. J. VINOY ◽  
JOSE K. ABRAHAM ◽  
V. K. VARADAN
Keyword(s):  
Fractal Dimension ◽  
Resonant Frequency ◽  
Numerical Simulations ◽  
Fractal Dimensions ◽  
Input Resistance ◽  
Direct Influence ◽  
Fractal Nature ◽  
Science And Engineering ◽  
Resonant Frequencies ◽  
Atmospheric Sciences

During the last few decades, fractal geometries have found numerous applications in several fields of science and engineering such as geology, atmospheric sciences, forest sciences, physiology and electromagnetics. Although the very fractal nature of these geometries have been the impetus for their application in many of these areas, a direct quantifiable link between a fractal property such as dimension and antenna characteristics has been elusive thus far. In this paper, the variations in the input characteristics of multi-resonant antennas based on generalizations of Koch curves and fractal trees are examined by numerical simulations. Schemes for such generalizations of these geometries to vary their fractal dimensions are presented. These variations are found to have a direct influence on the primary resonant frequency, the input resistance at this resonance, and ratios resonant frequencies of these antennas. It is expected that these findings would further enhance the popularity of the study of fractals.

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.

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