Electronics
Ata Ollah Mirzaei; Amir Musa Abazari; Hadi Tavakkoli
Abstract
Nowadays, planar spiral coils are widely used in different applications. Mutual inductance of two adjacent coils, is one of the critical operating principles in near-field wireless power and data transmission systems, significantly impacting their performance. Hence, in this study, the mutual inductance ...
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Nowadays, planar spiral coils are widely used in different applications. Mutual inductance of two adjacent coils, is one of the critical operating principles in near-field wireless power and data transmission systems, significantly impacting their performance. Hence, in this study, the mutual inductance between two similar concentric planar spiral coils is investigated. The effect of main parameters, including the track width, w, and the space between two consecutive turns, s, with a fixed inner and outer diameter of the coils are investigated. The Taguchi method using the L16 array in Minitab environment is used to optimize design parameters. The samples of applied Taguchi, are modeled and simulated via ANSYS Maxwell. The results show that the mutual inductance increases by reducing the two investigated parameters. Based on the Taguchi analysis, it is revealed that the effect of the response for both of the investigated parameters is very close. By applying the main effect analysis the obtained results are verified. This interesting result is important in the design of planar spiral coils while we have fabrication limitations in a real sensor design realization.
Electronics
Amir Davami; Mohammad Hadi Shahrokh Abadi
Abstract
Surface plasmon resonance (SPR) sensors have been widely considered for their sensitivity, accuracy, and appropriate response speed. This article simulates and analyzes the effects of phosphorene nanotubes (PNTs) layer with various diameters and rolling directions on the structure of SPR biosensor in ...
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Surface plasmon resonance (SPR) sensors have been widely considered for their sensitivity, accuracy, and appropriate response speed. This article simulates and analyzes the effects of phosphorene nanotubes (PNTs) layer with various diameters and rolling directions on the structure of SPR biosensor in the Lumerical software environment. The main structure is based on the structure of Kretschmann and the use of the BK7 prism, a gold (Au) layer, and the end layer of phosphorene nanotubes. The proposed SPR biosensor reflectance curves are obtained, analyzed, and compared for various modes of refractive index n = 1.33 and 1.339, resembling a neutral watery medium and a bacterial medium, respectively. The results show that the minimum reflection is achieved for 30 nm Au at an SPR resonance angle of θ = 71.59° while by adding phosphorene nanotubes, it is observed that at a diameter of 10.08 A and an armchair rolling direction, the configuration on the Au layer becomes favorable. The minimum reflectance of 0.199 is observed for the armchair phosphorene nanotubes (10.08A) layer over 30 nm Au. The combination also provides a sensitivity of 152°/RIU for Δn = 0.009 with a high detection accuracy of 0.079. The results demonstrate that the layer of phosphorene nanotubes has a positive effect on SPR biosensors, and it can be used as a controlling factor in SPR biosensors.