Effective medium modeling and experimental characterization of multilayer dielectric with periodic inclusion

Zhao, Teng

doi:10.31274/etd-180810-4015

Cited by 6 publications

(3 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the measurement for the crack requires more parameters for measurement. The measurement for effective permittivity is not straight forward but can be analysed with the model presented in [44]. Assuming that the transmission parameter from the reader antenna to the tag antenna is S 12 and back-scattering transmission parameter is S 21 (S 12 is the reverse voltage gain whereas S 21 is the forward voltage gain), the transmission parameter from the tag antenna to the tag chip is S 23 , and the transmission from tag chip to antenna is S 32 , the equation describing the transmission is:…”

Section: Rfid Base Materials Identification and Crack Sensingmentioning

confidence: 99%

Machine Learning-Based Structural Health Monitoring Using RFID for Harsh Environmental Conditions

Zhao

Sunny

et al. 2022

Electronics

View full text Add to dashboard Cite

Post Operation Clean Out (POCO) is the process to remove hazardous materials and decommission nuclear facilities at the end of a nuclear plant’s lifetime. The introduction of Internet of Things (IoT) technologies in the environment, especially radio frequency identification (RFID), would improve efficiency and safety by intelligently monitoring POCO activities. In this paper, we present a passive material identification and crack sensing method developed for the integration of sensing and communication using commercial off-the-shelf (COTS) RFID tags, which is a long-term solution to material property monitoring under insulation for harsh environmental conditions. To validate the effectiveness of material identification and crack monitoring, machine learning techniques have been applied, and the feasibility of the study has been outlined. The result shows that the material identification can be achieved with traditional features and obtain improved accuracy with three-layer multi-layer neural networks (MLNN). In crack characterization, the tree algorithm based on traditional features achieves a reasonable accuracy, while three-layer MLNN is the best solution, which supports the efficiency of traditional feature extraction methods in specific applications.

show abstract

Section: Rfid Base Materials Identification and Crack Sensingmentioning

confidence: 99%

Machine Learning-Based Structural Health Monitoring Using RFID for Harsh Environmental Conditions

Zhao

Sunny

et al. 2022

Electronics

View full text Add to dashboard Cite

show abstract

“…e addition of metamaterial structure in the substrate of the proposed fractal antenna will produce a negative electrical permittivity (ε 2 < 0) and negative magnetic permeability (μ 2 <0) in the (4.8-5.8) GHz frequency band, as shown in Figure 7. erefore, the effective electrical permittivity (ε eff ) and effective magnetic permeability (μ eff ) of the equivalent substrate must be calculated using following equations [26,27], as shown in Figure (10):…”

Section: Effective Permittivity and Effective Permeability Of The Met...mentioning

confidence: 99%

A New Approach for Calculation of Metamaterial Printed Fractal Antenna Using Galerkin’s Method

Saedy

Saleh

Ali

2022

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

This work provides a new approach for computing the impedance of a proposed multiband printed fractal antenna for wireless applications. Galerkin’s method is applied to deduce the impedance relationship of the proposed structure and then compute the return loss verses frequency by converting the impedance matrix of the proposed antenna [Z] to the scattering matrix [S]. This model is developed in order to study the impedance of the proposed antenna after adding a metamaterial structure in the antenna substrate. The obtained model is able to determine the resonant frequencies and the return loss of the proposed antenna. The model is also able to define the changes in these values when the dimensions of the proposed structure change. The proposed antenna provides multiband wireless applications in the (1–10) GHz frequency band, and the return loss of the proposed fractal antenna has been improved using negative permittivity and negative permeability metamaterial structure.

show abstract

“…Figure 2 shows that when a backward electromagnetic wave is incident on a metallic reflector, then the wave gets reflected back at an angle of 180° toward the main lobe in the same phase with main lobe radiation, resulting in gain enhancement of the proposed design. Total path difference may be calculated by evaluating effective dielectric constant [29] of medium consisting of different dielectrics with different heights aswhere where f d is the design frequency.…”

Section: Working Principle Of the Proposed Antennamentioning

confidence: 99%

A high gain wideband circularly polarized microstrip antenna

Kumar

Dwari

Pandey

et al. 2020

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

In this paper, a high gain wideband circularly polarized (CP) microstrip antenna is presented for broadband operation. The proposed structure comprised of a partially grounded printed monopole antenna loaded with a split ring resonator and a metallic reflector. By using the metallic reflector surface underneath the patch radiator results in the reflected waves in the same phase with main lobe radiation, thereby improving the gain and it also acts like a secondary radiator to generate wideband CP behavior in the proposed design. A gain enhancement of 4.3 dBi is achieved in the operating frequency band as compared with the design without a metallic reflector. The maximum gain achieved in the presented method is 8.6 dBic over the entire operating range. The proposed design shows a wideband behavior ranging from 4.30 to 9.10 GHz with the 10-dB impedance bandwidth of 71.64%. In addition, the proposed design yielded a broadside right hand CP radiation with a 3-dB axial ratio bandwidth of 33.88% from 4.98 to 7.01 GHz. The proposed antenna is fabricated and experimental results on reflection coefficient, gain, axial ratio, and radiation patterns concede well with simulation results.

show abstract

Effective medium modeling and experimental characterization of multilayer dielectric with periodic inclusion

Cited by 6 publications

References 58 publications

Machine Learning-Based Structural Health Monitoring Using RFID for Harsh Environmental Conditions

Machine Learning-Based Structural Health Monitoring Using RFID for Harsh Environmental Conditions

A New Approach for Calculation of Metamaterial Printed Fractal Antenna Using Galerkin’s Method

A high gain wideband circularly polarized microstrip antenna

Contact Info

Product

Resources

About