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166 articles for “resonant frequency”
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A Contribution to the Frequency and Transient Analysis of High Voltage Bushings
Abstract: The paper suggests a method for determining the frequency characteristics and transient response of capacitively graded high voltage bushings. It is based on an s-domain circuit model that describes the grading conducting foils and the insulating layers. In most cases, they are of different axial lengths. A system of simultaneous differential and algebraic equations is derived taking these differences into account. Its closed-form solution, subject to the boundary conditions, can …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 1, 2019 · pp. 15–26 Read article
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Enhancement in RMPA Parameters using Slotted Rhombus Connected Square Shaped Antenna with Left Handed Metamaterial
Abstract: In this paper, rectangular microstrip patch antenna (RMPA) along with metamaterial which has design of “slotted rhombus connected with rectangular shaped cover structure” is proposed at height of 3.2 mm from the ground plane. The RMPA with proposed metamaterial structure is designed to resonate at 2.7 GHz frequency. This work is mainly focused on increasing the potential parameters of microstrip patch antenna. Proposed metamaterial design structure significantly reduces the return …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 1, 2017 · pp. 49–54 Read article
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Amelioration of Parameters of Antenna using Metamaterial with Negative µ and ε for WLAN
Abstract: AbstractIn this paper, a Rectangular Microstrip Patch Antenna with “Multi Discoidal Rings” shaped metamaterial cover is designed and replicate at a height of 3.276mm from the ground plane. The antenna along with the proposed metamaterial cover is designed to resonate at 3.36 GHz frequency (in S-Band). Proposed metamaterial cover significantly reduces the return loss and increases the bandwidth and efficiency of the antenna in comparison to rectangular microstrip patch antenna …
Published in Journal of Communication Engineering & Systems · Vol. 3, Issue 1, 2013 · pp. 4–10 Read article
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Quadruplet Circular Hollow Ring Structure to Ameliorate RMPA parameters for WLAN
Abstract: A Rectangular Microstrip Patch Antenna with “Quadruplet circular hollow rings” shaped metamaterial cover is designed and replicate at a height of 3.2 mm from the ground plane. The antenna along with the proposed metamaterial cover is designed to resonate at 2.21 GHz frequency (in S-Band). But the proposed metamaterial cover significantly reduces the return loss and increases the bandwidth and efficiency of the antenna in comparison to rectangular microstrip patch …
Published in Journal Of Network security · Vol. 1, Issue 1, 2013 Read article
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Fivefold Stave in Squares with Circular Disk Structure Contiguous with RMPA for Augmentation of Variant Parameter for WLAN at 2.95 GHz
Abstract: A rectangular microstrip patch antenna with “Fivefold Stave in Squares with Circular Disk” shaped meta material cover is designed and replicated at a height of 3.2 mm from the ground plane. The antenna along with the proposed metamaterial structure is designed to resonate at 2.95 GHz frequency. But the proposed metamaterial cover significantly reduces the return loss and increases the bandwidth, and gain of the antenna in comparison to rectangular …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 37–42 Read article
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Design of “Hexagonal Rings’’ Shaped Cover Metamaterial for WLAN Applications Enhancement of Microstrip Patch Antenna Parameters at 2.31 GHz
Abstract: A rectangular microstrip patch antenna (RMPA) along with metamaterial which has design of hexagonal rings-shaped cover structure is proposed at a height of 3.2 mm from the ground plane. The RMPA with proposed metamaterial structure is designed to resonate at 2.31 GHz frequency. This work is mainly focused on increasing the potential parameters of microstrip patch antenna. The proposed metamaterial structure significantly reduces the return loss and increases the bandwidth …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 1, Issue 1, 2014 · pp. 32–36 Read article
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Small Size High Gain Antenna and High Efficiency Rectifier for RF Energy Harvesting in 2.45 GHz ISM Band
Abstract: A streamlined microwave energy harvesting system to harvest energy in 2.45 GHz presented in this paper. An electromagnetically coupled square micro-strip antenna is designed and fabricated for formation in proposed system. Antenna gain of 6.7 db and bandwidth from 2.42to 2.47 GHz is achieved. The maximum gain of proposed antenna is 24 db at frequency 2.1 GHz. Rectifier circuit consists of a resonant circuit and a boosting circuit for enhancing …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 1, 2016 · pp. 41–46 Read article
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Case Study of Multipulse Converter System for IGBT Based Inverter in Induction Melting Furnace
Abstract: AbstractHarmonic mitigation is an important aspect for the smooth operation of modern power electronics converters, medical equipment, and home appliances which are generally fed by a common grid supply. In large power equipment such as induction furnaces, it becomes necessary to reduce or eliminate harmonics from the supply. In order to cater dynamic load cycle during complete melting cycles in induction furnaces, power needs to vary. This can be achieved …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 1, 2017 · pp. 17–23 Read article
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Polymer Nanocomposite for Electronic Applications
Abstract: Polymer matrix nanocomposites are studied in this topic to understand commercial application in batteries, capacitor, sensing, radio frequency apparatus, antennas, non-resonant device, high quality filters, and solar cells. Act of substrate and fillers contribute interlinked electro-optic transduction ratio. Ceramic nano-composers are CuZnFe2O4, ZnO, and graphene oxide. Different polymerization techniques applied to produce compositions on conducting polymer. Polymer nanocomposites used to apply at electrochemical storage of energy. Bio-safe characteristics of biopolymer …
Published in Nano Trends – A Journal of Nano Technology & Its Applications · Vol. 22, Issue 3, 2020 · pp. 16–20 Read article
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Coupled Plasmon Phonon Polariton Waves in Cylindrical Zinc Selenide (ZnSe) Semiconductor: A Theoretical Study
Abstract: Zinc Selenide (ZnSe) is a semiconductor material. In this study, Bloch hydrodynamical model is applied as a theoretical tool to investigate the coupling among plasmons, phonons and photons in the Zinc Selenide (ZnSe) semiconductor material. Here the geometrical shape of this semiconductor is taken cylindrical and surrounded with vacuum as a dielectric medium. Plasmons are the quanta of elementary excitations produced by the valence electron oscillations and phonons are the …
Published in Research & Reviews : Journal of Physics · Vol. 11, Issue 2, 2022 · pp. 1–5 Read article
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Natural Frequency Analysis of Polymer Composites
Abstract: Polymer composite materials are increasingly utilized in vibration-sensitive engineering applications due to their high strength-to-weight ratio, design flexibility, and tailorable dynamic properties. Among these properties, natural frequency plays a crucial role in determining structural stability, resonance avoidance, and dynamic performance. This review presents a comprehensive synthesis of recent research on the natural frequency characteristics of polymer composite structures, with emphasis on material properties, structural configurations, boundary conditions, damage effects, environmental …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 541–553 Read article
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Simulation and Analysis of Sub Synchronous Resonance in a Series Compensated Transmission System
Abstract: Series compensation of a transmission line is necessary as it increases the power transfer capability of a transmission line. Employing series compensation also leads to phenomenon of sub synchronous resonance (ssr) wherein the electrical and mechanical natural frequencies match and exchange energy leading to excitation of natural torsional modes of the turbine generator unit. This leads to mechanical fatigue of the shaft on which turbine and generator are connected. This …
Published in Journal of Power Electronics and Power Systems · Vol. 5, Issue 3, 2015 · pp. 87–96 Read article
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The Advanced Foam Materials Production in Microgravity using the Process of Vibroturbulization
Abstract: Recently, the task of the intensification of the existing technological processes using the intensivemixing of different environment, which are characterized by different densities (water + gas, water +solid particles + gas, water + oil so forth) is actual. The conducted studies determined that at acertain frequency and vibration acceleration of vibration, a resonant phenomenon occurs—vibroturbulization, in which the above of the fluid surface air in a vibrating vessel with fluid …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 12, Issue 1, 2021 · pp. 34–47 Read article
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Formation and Spectral with Nano- Study of Six and Seven Membered Ring Derivatives
Abstract: The nanoscale properties of some organic chemicals make the materials have multiple engineering, chemical, biological and industrial applications, including heterocyclic derivatives. Advanced research in this field has made it possible to use them widely as fluorinated materials and in the electronics industry. These derivatives also have good stability at different temperatures due to the presence of heterogeneous atoms within their structure. These cyclic derivatives have proven their biological effectiveness against …
Published in Journal of Modern Chemistry & Chemical Technology · Vol. 16, Issue 2, 2025 · pp. 85–95 Read article
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Performance Analysis of Single Band PIFA for 4G/LTE Mobile Communication Networks
Abstract: This paper presents a Planer Inverted F Antenna (PIFA) for Fourth Generation (4G) Long Term Evaluation (LTE). The proposed antenna is designed on FR4 substrate and the dimension is 22.5 mm x 18.5 mm x 2.8 mm. The Antenna covers the LTE 40 frequency band application from 2.3–2.4 GHz (resonance at 2.35 GHz). Different performance parameters: return loss, VSWR, radiation pattern, current distribution, gain and efficiency are analyzed. The proposed …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 3, 2016 · pp. 1–7 Read article
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Stable control of the motion of gas bubbles dissolved in a vibrating fluid in microgravity conditions
Abstract: Previous theoretical and experimental studies of the effect of vibration on gas bubbles, dissolved in a fluid, permitted to establish the localization and stable position of a “swarm” of gas bubbles at a certain level of fluid in the vessel corresponding to a certain frequency and vibration acceleration, aswell as to the volume of a swarm of gas bubbles. The control of a “swarm“ of gas bubbles in a fluid …
Published in Recent Trends in Fluid Mechanics · Vol. 8, Issue 1, 2021 · pp. 34–44 Read article
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Solving Problems Arising during the Monocrystals Growth in Microgravity Using Controlled Vibration
Abstract: Earlier studies of the vibration effect on a vessel with a fluid with gas bubbles dissolved in it permitted to establish the localization and stable position of the "swarm" of gas bubbles at a certain level of fluid in the vessel, corresponding to a certain frequency and vibration acceleration, as well as the volume of the "swarm" of gas bubbles. Controlling the "swarm" of gas bubbles in a fluid by …
Published in Research & Reviews : Journal of Space Science & Technology · Vol. 10, Issue 1, 2021 · pp. 25–40 Read article
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Design and Simulation of Compact Wideband Rectangular Dielectric Resonator Antenna using Double Metallic Strips for Ku-Band Applications
Abstract: An objective of the paper is to optimize the parameters, and simulation analysis of compact wideband rectangular dielectric resonator antenna (RDRA). In this paper, a compact wideband, rectangular dielectric resonator antenna is presented using relatively low dielectric constant material and using double microstrip patch. The rectangular DRA is fed with a modified stepped microstrip feed to ensure efficient coupling between the RDRA and the feeder. The performance of the proposed …
Published in Journal of Microwave Engineering and Technologies · Vol. 1, Issue 1, 2014 · pp. 11–20 Read article
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Theoretical Study of Surface Excitations at Planar Surface of Zinc Selenide (ZnSe)
Abstract: ZnSe is a II-VI semiconductor material and has very novel properties. So it is currently demanding for various applications. Dispersion relation is employed here to study the elementary surface excitations at the planar surface of Zinc Selenide (ZnSe) semiconductor. These excitations are of various types such as plasmons, phonons, excitons etc. Plasmons are the quanta of valence electron oscillations, phonons are the quanta of lattice vibrations and excitons are the …
Published in Research & Reviews : Journal of Physics · Vol. 11, Issue 3, 2022 · pp. 1–5 Read article
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Enhancement of Proton Density Weighted Magnetic Resonance Images using Singular Value Decomposition in Wavelet Domain
Abstract: Image enhancement techniques for low contrast medical images using Singular Value Decomposition (SVD) in Discrete Wavelet Transform domain (SVD-DWT) are proposed in the literature. However, shift sensitivity, poor directionality and a lack of phase information are the primary drawbacks of the discrete wavelet transform. This work introduces a novel method of image enhancement (SVD-SWT) using SVD in Stationary Wavelet Transform (SWT) to improve the contrast of Proton Density weighted Magnetic …
Published in Research & Reviews: A Journal of Embedded System & Applications · Vol. 10, Issue 2, 2022 · pp. 10–21 Read article