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Miniaturization of Dimensions Based on Square Loop Resonator with NP Fractal Model for Sensor Applications

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Miniaturization of Dimensions Based on Square Loop Resonator...

13th International electrical engineering Congress, iEECON 2025

作者： Nantapanich, Nutyada Wongsin, Norakamon Tangthong, Nipont Rakluea, Chawalit Rakluea, Paitoon Chanwattanapong, Wanchalerm Chudpooti, Nonchanutt Mahatthanajatuphat, Chatree Rajamangala University of Technology Faculty of Engineering Department of Electronics and Telecommunication Engineering Thanyaburi12110 Thailand King Mongkut's University of Technology North Bangkok Faculty of Applied Science Department of Industrial Physics and Medical Instrumentation Bangkok10800 Thailand King Mongkut's University of Technology North Bangkok Faculty of Engineering Department of Electrical and Computer Engineering Bangkok10800 Thailand

ISBN: (纸本)9798331543952

This paper proposes a reduction in the dimensions of a square loop resonator via the utilization of fractal techniques. The 2nd order NP fractal model is investigated to minimize the dimensions of the square loop resonator. The suggested fractal resonator is indirectly fed via the coupling line encircling the resonator to enhance impedance matching. The suggested fractal resonator has a frequency response of 2.936 GHz, with |S11| and |S21| evaluated at -16.17 dB and -2.09 dB, respectively. The dimensions of the suggested fractal resonator are 10.5×10.5 mm2, representing a reduction of roughly 56.9% compared to the square loop resonator. Consequently, the suggested fractal resonator may serve as a sensor for the measuring instrument. © 2025 IEEE.

关键词： Fractal dimension

High Finesse, Air-Gap Optical Reference Cavity for Low Noise Microwave Generation

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High Finesse, Air-Gap Optical Reference Cavity for Low Noise...

Conference on Lasers and Electro-Optics (CLEO)

作者： Yifan Liu Dahyeon Lee Naijun Jin Charles A. McLemore Yizhi Luo Megan Kelleher Peter Rakich Scott A. Diddams Franklyn Quinlan Department of Physics University of Colorado Boulder Boulder CO USA Department of Applied Physics Yale University New Haven CT USA National Institute of Standards and Technology Boulder CO USA Electrical Computer and Energy Engineering Boulder CO USA

We lock two, 1.2 THz-spaced lasers to a million-finesse air-gap optical cavity, demonstrating 40 dB common-mode phase noise rejection and a path towards compact, low noise, optically derived microwaves without ultrahi... 详细信息

ISBN: (纸本)9781957171258

关键词： Fiber lasers Frequency combs Noise reduction Optical components Phase measurement Phase noise

Solution formula for generalized two-phase Stokes equations and its applications to maximal regularity;model problems

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arXiv 2022年

作者： Kajiwara, Naoto Applied Physics Course Department of Electrical Electronic and Computer Engineering Gifu University Yanagido 1-1 Gifu501-1193 Japan

In this paper we give a solution formula for the two-phase Stokes equations with and without surface tension and gravity in the whole space with flat interface. The solution formula has already considered by Shibata-Shimizu. However we reconstruct the formula so that we are able to prove resolvent estimate and maximal regularity estimate. In the previous work, they needed to assume additional conditions on normal components. We also take care of normal components, while the assumption becomes weaker than before. The method is based on an H∞-calculus which has already used for the Stokes problems with various boundary conditions in the half *** Codes 35D35, 35B45 © 2022, CC0.

关键词： Navier Stokes equations

engineering the directionality of hot carrier tunneling in plasmonic tunneling structures

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arXiv 2023年

作者： Abbasi, Mahdiyeh Liao, Shusen Zhu, Yunxuan Natelson, Douglas Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Applied Physics Graduate Program Smalley-Curl Institute Rice University HoustonTX77005 United States Department of Physics and Astronomy Engineering Rice University HoustonTX77005 United States Department of Materials Science and Nanoengineering Rice University HoustonTX77005 United States

Tunneling metal-insulator-metal (MIM) junctions can exhibit an open-circuit photovoltage (OCPV) response under illumination that may be useful for photodetection. One mechanism for photovoltage generation is hot carrier tunneling, in which photoexcited carriers generate a net photocurrent that must be balanced by a drift current in the open-circuit configuration. We present experiments in electromigrated planar MIM structures, designed with asymmetric plasmonic properties using Au and Pt electrodes. Decay of optically excited local plasmonic modes preferentially creates hot carriers on the Au side of the junction, leading to a clear preferred directionality of the hot electron photocurrent and hence a preferred polarity of the resulting OCPV. In contrast, in an ensemble of symmetric devices constructed from only one Au, polarity of the OCPV has no preferred direction. Copyright © 2023, The Authors. All rights reserved.

关键词： Plasmonics

Exploring CST Simulation Techniques for TEM Mode and Unit Cell Analysis to Determine Refractive Index

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Exploring CST Simulation Techniques for TEM Mode and Unit Ce...

International electrical engineering Congress (iEECON)

作者： Kritthanit Malathong Jessada Konpang Sayree Kongjareansuk Prayoot Akkaraekthalin Nonchanutt Chudpooti Phatsakul Thitimahatthanakusol Department of Electrical and Telecommunication Engineering Faculty of Engineering Rajamangala University of Technology Krungthep Bangkok Thailand Department of Electrical and Telecommunication Engineering Faculty of Engineering Rajamangala University of Technology Bangkok Thailand Department of Electrical and Computer Engineering Faculty of Engineering King Mongkut's University of Technology North Bangkok Bangkok Thailand Department of Industrial Physics and Medical Instrumentation Faculty of Applied Science King Mongkut's University of Technology North Bangkok Bangkok Thailand Department of Telecommunication Engineering Faculty of Engineering and Technology Rajamangala University of Technology Isan Nakorn Ratchasima Thailand

ISBN: (数字)9798350383591

ISBN: (纸本)9798350383607

The study investigates the accuracy of CST simulations in TEM mode and unit cell simulations for determining the refractive index (n) of materials. The results in TEM mode align with the expected properties of air, affirming the correctness of settings. However, when using unit cell simulations, the materials properties template inaccurately calculates n values, deviating from reality. Further examination reveals that unit cell simulations emit waves of different modes (TE, TM, or CP) instead of TEM, leading to inconsistencies. A revised equation is introduced to address this discrepancy, yielding results closer to actual n values. The importance of parameters like D and m is emphasized, as variations significantly impact the n values obtained. The introduced equation provides more accurate n cal-culations in unit cell simulations than the default CST template.

关键词： electrical engineering Analytical models Atmospheric modeling Refractive index Mathematical models Material properties

Wafer-level fabrication of Fabry- Pérot resonators with finesse exceeding one million

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Wafer-level fabrication of Fabry- Pérot resonators with fin...

Conference on Lasers and Electro-Optics (CLEO)

作者： Naijun Jin Yifan Liu Charles A. McLemore Yizhi Luo David Mason Prashanta Kharel Scott A. Diddams Franklyn Quinlan Peter Rakich Department of Applied Physics Yale University New Haven CT USA National Institute of Standards and Technology Boulder CO USA Department of Physics University of Colorado Boulder Boulder CO USA Electrical Computer and Energy Engineering Boulder CO USA

We demonstrate a wafer-level fabrication technique for high-finesse Fabry-Pérot optical resonators based on reflow and optical contact bonding. These resonators have finesse exceeding one million at 1550 nm and c... 详细信息

ISBN: (纸本)9781957171258

关键词： Cavity quantum electrodynamics Dielectric mirrors Grating couplers Optical resonators Resonant modes Surface roughness measurement

Magnetic Anisotropy and Its Structural Origins in Ru-Substituted Manganite Films

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arXiv 2023年

作者： Das, Brajagopal Wysocki, Lena Schöpf, Jörg Yang, Lin Capua, Amir van Loosdrecht, Paul H.M. Kornblum, Lior Andrew & Erna Viterbi Department of Electrical & Computer Engineering Technion Israel Institute of Technology Haifa3200003 Israel University of Cologne Institute of Physics II Cologne50937 Germany Department of Applied Physics The Hebrew University of Jerusalem Jerusalem91904 Israel

Controlling magnetic anisotropy (MA) is important in a variety of applications including magnetic memories, spintronic sensors, and skyrmion-based data distribution. The perovskite manganite family provides a fertile playground for complex, intricate, and potentially useful structure-magnetism relations. Here we report on the MA that emerges in 10% Ru substituted La0.7Sr0.3MnO3 (Ru-LSMO) films for which strong perpendicular magnetization and anisotropic in-plane magnetization are found. These moderately compressively strained films possess a rich microstructure, consisting of coherently strained phase which evolves into a one dimensional (1D) periodically-modulated structure above a critical thickness. We illustrate how 10% Ru substitution plays a crucial role behind the observed MA, and how the structural distortion and 1D periodic structural modulation produce the anisotropic in-plane magnetization. We highlight the practical significance of the observed MA, which could pave the way towards the realization of cutting-edge oxide-based room temperature spintronic memory devices. © 2023, CC BY.

关键词： Magnetic anisotropy

Global-Local Active Contour for Segmenting Images with Simultaneous Inhomogeneity and Texture

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SSRN

SSRN 2024年

作者： Shao, Pei-Chiang Department of Applied Mathematics Chung Yuan Christian University Zhongli District Taoyuan City320314 Taiwan Undergraduate Program in College of Electrical Engineering and Computer Science Chung Yuan Christian University Zhongli District Taoyuan City320314 Taiwan

Severe intensity inhomogeneity (InH) and complex real-world textures cause great difficulties and become two important issues in image segmentation and object extraction applications. Plenty of methods are proposed to tackle these issues, however, they usually perform poorly on images possess both InH and texture. In this paper, we propose a region-based active contour model for segmenting images with simultaneous inhomogeneity and texture. A new bias field possesses both global and local smoothness properties is proposed to handle the InH issue, and a pixel inhomogeneity factor (PIF) is employed to jointly deal with InH and textured images. We also employ the total variation (TV) regularization to further smooth and denoise the transformed PIF image, making the segmentation process to have the nice properties of global convergence and independence of contour initialization. A large number of numerical experiments and comparisons are conducted to demonstrate the effective performance of the newly proposed method. © 2024, The Authors. All rights reserved.

关键词： Textures

Maximal Lp-Lq regularity for the Stokes equations with various boundary conditions in the half space

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arXiv 2022年

作者： Kajiwara, Naoto Applied Physics Course Department of Electrical Electronic and Computer Engineering Gifu University Yanagido 1-1 Gifu501-1193 Japan

We prove resolvent Lp estimates and maximal Lp-Lq regularity estimates for the Stokes equations with Dirichlet, Neumann and Robin boundary conditions in the half space. Each solution is constructed by a Fourier multiplier of x′-direction and an integral of xN-direction. We decompose the solution such that the symbols of the Fourier multipliers are bounded and holomorphic. We see that the operator norms are dominated by a homogeneous function of order −1 for xN-direction. The basis are Weis's operator-valued Fourier multiplier theorem and a boundedness of a kernel operator. We give a new simple approach to get maximal regularity in the half *** Codes 35D35, 35B45 © 2022, CC0.

关键词： Navier Stokes equations