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404 articles for “Circulator”
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Design of a Microstrip Patch Antenna with an Array of Circular SRR Using Left-Handed Metamaterial
Abstract: In this paper, the design of a patch antenna with a metamaterial composed of circular SRR is proposed. The proposed antenna design is fabricated on FR4 substrate and the experimental results obtained are in good agreement with the simulated results. By using the circular SRR structure the return loss of the conventional patch antenna has been improved from -11.5dB to -18.5dB. influence of metamaterial designed on another layer characteristics of …
Published in Journal of Electronic Design Technology · Vol. 3, Issue 1-3, 2012 · pp. 24–28 Read article
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Circular Antenna with Square Slot at 2.1 GHz for RF Energy Harvesting Applications
Abstract: In this paper, a single band circular antenna loaded with square slots having an application in RF energy harvesting is introduced. Proposed antenna containing of a circular antenna along with square slot loaded inside in the patch. For an antenna design, Computer Simulation Technique (CST) solver simulator was used. The antenna is being fabricated and its characteristics were measured. The band is covering most of the wireless applications. The simulated …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 2, 2019 · pp. 22–24 Read article
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Design of a Multiband Antenna with Rectangular and Circular Slots for 5G Mobile Technology
Abstract: AbstractThis paper presents a microstrip patch antenna for 5G mobile communication. Requests for mobile communication arise because of rapid growth in mobile users. So, users need more features like high data rate, good communication and reduced traffic on their mobile phones. These requirements can be met using 5G technology. 5G technology offers very high bandwidth, reduced latency, broadband spectrum, improved QoS and a better capacity. 5G operates from 24 GHz …
Published in Journal of Microwave Engineering and Technologies · Vol. 7, Issue 2, 2020 · pp. 30–34 Read article
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A Dipole Circular Patch Antenna for Operation in the X-Band
Abstract: This microwave engineering research paper proposes, designs, calculates, and simulates a novel dipole circular patch antenna for theoretical wideband operations in the X-band (the 8 GHz to 12 GHz frequency range). This proposed microstrip patch antenna was realized using FR-4 as a dielectric (a thickness of 1.5 mm) with copper being used in both the ground plate and the two transmitting circular elements (the so-called patches with a thickness of …
Published in Journal of Microwave Engineering and Technologies · Vol. 8, Issue 2, 2021 · pp. 1–8 Read article
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Free Vibration Analysis of Thin Circular and Annular Plate with General Boundary Condition
Abstract: This paper presents a numerical analysis of free vibration of thin circular and annular plate using finite element method. The first five natural frequencies are presented for uniform annular plates of various inner-to-outer radii ratios, with nine possible combinations of free, clamped and simply supported boundary conditions at the inner and outer edges of plates. The accuracy of the method is established by comparing the results available in the literature. …
Published in Journal of Structural Engineering and Management · Vol. 2, Issue 2, 2015 · pp. 25–34 Read article
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Numerical Investigation of Influence of Rate of Rotation on Formation of Vapor Around Two Heated Circular Cylinders Immersed in Water Inside a Channel
Abstract: AbstractThe complexity problem of fluid flow and heat transfer over an array of circular cylinders are common in industrial applications of the fluid dynamics. The complex nature of the problem encountered in industry, gives rise to certain significant dimensions in the fluid dynamics theory. Some of them are the fluid flow interaction, interferences in flow and vortex dynamics which are typically found in compact heat exchangers, cooling of electronic equipment, …
Published in Recent Trends in Fluid Mechanics · Vol. 4, Issue 3, 2017 · pp. 14–25 Read article
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Detail study on circular runway
Abstract: The paper presents the new concept for future air terminal traffic activity. This runway is utilized for take-off and land from any direction, hence offering the remarkable trademark that the runway can be utilized under any wind condition through the opportunities for an airplane to work consistently with headwind during take-off and landing. Besides, it will permit airplane to abbreviate their worldwide direction through upgraded take off and appearance courses …
Published in Trends in Transport Engineering and Applications · Vol. 8, Issue 1, 2021 · pp. 16–21 Read article
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A Pre-experimental Study to Assess the Effectiveness of Buerger Allen Exercises on Improving the Peripheral Blood Circulation among the Diabetic Patients Admitted at GGS Medical Hospital, Faridkot
Abstract: Diabetes mellitus is a group of metabolic diseases in which a person has high blood sugar because thepancreas does not produce enough insulin or cells do not respond to insulin. The high blood sugarproduces classical symptoms of polyuria, polydipsia and polyphagia. Type 2 diabetes mellitus is non-insulin dependent in which there is an absolute insulin deficiency due to destruction of islets cell in thepancreas. Type 2 diabetes mellitus makes up …
Published in Journal of Nursing Science & Practice · Vol. 11, Issue 2, 2021 · pp. 35–42 Read article
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Integrated Analysis of Stress Patterns in Transparent Polycarbonate Specimens: A Comparative Study between Photoelasticity and FEA Simulation for Compact Circular Testing
Abstract: Photoelasticity stands as a robust experimental technique within the realms of mechanics and materials science, offering a means to visually assess and analyze stress distribution within materials possessing transparency or translucency. This method, a non-destructive testing approach, involves the visualization of stress on a model subjected to a load, leveraging the unique property of materials known as birefringence or double refraction. The procedure entails the careful selection of a suitable …
Published in Journal of Polymer & Composites · Vol. 12, Issue 4, 2024 · pp. 79–87 Read article
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The Relevance of Green University Concept on Students’ Enrollment Decision for Higher Education: The Role of Circular and Green Polymer Science
Abstract: Students today increasingly evaluate the commitment of higher education institutions to sustainability and environmental stewardship when making enrollment decisions. As prospective students research colleges and universities, they meticulously assess each institution's environmental policies, initiatives, and programs. This focus on sustainability reflects a broader trend of rising environmental awareness among young people, who often prioritize their values in their educational choices. The present study uniquely examines how the concept of a …
Published in Journal of Polymer & Composites · Vol. 12, Issue 7, 2024 · pp. 47–53 Read article
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A Bibliometric Review of Sustainable Engineering of Last 30 Years: Emerging Circular and Green Polymer Science
Abstract: The application of sustainable engineering is a ground-breaking strategy for the long-term enhancement of the human condition. A holistic understanding is required for inviting more research on this topic therefore, this study intent to provide a decentralized framework with the aid of a bibliometric evaluation to examine the research trend on sustainable engineering. The study also contributes to the body of literature by providing insights into a robust, reliable thematic …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 405–416 Read article
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Free Vibration Analysis of Circular Perforated Laminated Plates
Abstract: This study investigates the free vibration characteristics of circular perforated laminated composite plates. A finite element model is created to analyze the effects of perforation patterns, hole sizes, and laminate configurations on the natural frequencies and mode shapes of these structures. The model incorporates shear deformation theory and accounts for the anisotropic nature of composite materials. Parametric studies were held to examine how varying perforation geometries, including hole diameter, spacing, …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 281–296 Read article
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Next-Generation Polymer Recycling for Circular and Sustainable Plastics
Abstract: Plastic waste has emerged as a serious global environmental issue because of the enormous quantities produced over the past several decades. Moreover, the continual rise in plastic production, coupled with low recycling rates, results in the steady accumulation of plastic in the environment each year. In addition, manufacturing new polymers consumes substantial amounts of energy and fossil fuel resources. Although renewable energy can reduce emissions to a great extent, still …
Published in Journal of Polymer & Composites · Vol. 14, Issue 2, 2026 · pp. 517–526 Read article
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Structural Performance Evaluation of Circular Perforated Plates under Mechanical Loading
Abstract: Circular perforated plates are structurally critical components in aerospace, automotive, and marine sectors, where perforation-induced stress concentrations govern failure under mechanical loading. This study conducts a systematic finite element analysis of stress distribution, deformation, and interlaminar behavior in aluminum and glass-epoxy laminates ([−45/45/90/0]S and [−45/45/90/0]AS) under uniform transverse pressure with clamped-free boundary conditions. Four perforation configurations—no hole, central hole, single-series, and 25-hole grid—were evaluated using ANSYS Shell-181, verified against Kirchhoff–Love, …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 · pp. 1–20 Read article
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Performance of Circular Model Footing Resting on Sand Bed Reinforced with Vertical Reinforcement in Dry Condition
Abstract: Soil stabilization is the process of improving the engineering properties of the soil. The good old method of stabilization is by using the chemicals stabilization, whereas the recent method of improving the strength of the soil is by using the vertical reinforced earth. In the present work sand is filled in the 250x250x375 mm MS tank by using sand raining technique at a relative density of 67%. MS circular plate …
Published in Journal of Geotechnical Engineering · Vol. 8, Issue 3, 2021 · pp. 1–9 Read article
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Methodical Strategy for STATCOMs Optimal Placement to Enhance Voltage Stability Margin Considering Circular Optimization Algorithm
Abstract: This study analyses voltage stability in the presence of STATCOM, focusing on the relationship between Voltage stability collapse and power system voltage stability. STATCOM and its optimal allocation are anticipated to enhance the voltage stability of the power system. Circular optimization algorithm is used to identify optimum sizing of STATCOM to increase voltage profile of the system. Practical simulation results are verified on IEEE 30 bus system considering multiple STATCOMs …
Published in Journal of VLSI Design Tools and Technology · Vol. 11, Issue 2, 2021 · pp. 14–23 Read article
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Effect of Nose Radius and Tool Shape on Diameter Error, Circularity and Surface Roughness in Dry Turning Machine
Abstract: The objective of this paper is to investigate the effect of nose radius and tool shape on diameter error, circularity and surface roughness of turned parts during dry machining operation. The paper presents both analytical and experimental results of nose radius, tool shape and surface roughness of a turned material (alloy steel AISI-4340) in three different levels of control parameters that have been affected by nine cutting tool shapes of …
Published in Trends in Machine design · Vol. 6, Issue 1, 2019 · pp. 29–37 Read article
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Increasing Total Solar Irradiance on Far Future Climate: General Atmospheric Circulation
Abstract: The total solar irradiation at the top of the atmosphere is the primary forcing mechanism for the Earth's Climate System. In this work, we used the addition of 10% in the radiation value (from 1360 Wm−2 to 1496 Wm−2) to simulate the Earth's climate system in the habitable zone inner orbit. Two tenyear- long fully coupled simulations using the Community Earth System Model were performed; the CONTROL experiment was configured …
Published in Research & Reviews : Journal of Space Science & Technology Read article
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Numerical Investigation on Concrete Filled Steel Tube Composite Circular Columns Under General Loading
Abstract: Concrete-filled steel tube (CFST) composite columns are extensively utilized in civil engineering constructions because of their numerous structural advantages, such as superior seismic performance, high load- bearing capacity, fire resistance, remarkable ductility, and ability to absorb energy effectively, especially in areas prone to seismic activity. CFST columns are employed in tall buildings and bridges to enhance rigidity and increase bearing capacity, but their behavior can be affected by buckling. There …
Published in Journal of Polymer & Composites · Vol. 13, Issue 2, 2025 · pp. 164–199 Read article
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Sustainable Concrete Solutions: Chemically Predictive Modeling of Geopolymer Versus Ordinary Concrete in a Circular Economy
Abstract: Concrete is a fundamental structural material widely used in civil engineering projects. It plays a key role in various types of building structures, with its quality directly influencing the durability of the construction. This research focuses on assessing the current state of concrete construction, highlighting critical issues and technical aspects in the process, while emphasizing the importance of improving construction quality and management practices. Geopolymer concrete (GPC) presents a viable …
Published in Journal of Polymer & Composites · Vol. 13, Issue 5, 2025 · pp. 170–192 Read article