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404 articles for “Circulator”
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A Compact Umbrella Shaped Patch Antenna using DGS for Dual/Triple/Quad Band Applications
Abstract: In this paper, a compact Umbrella shaped microstrip patch antenna for Quad band applications specially for X band, Ku band and K band applications is presented. The antenna is simulated using the Ansys soft HFSS simulator. The size of the antenna is 25 mm×25 mm ×1 mm and printed on an FR4 substrate. Defected ground structure in the form of concentric circular rings is used to increase the bandwidth of …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 3, 2015 · pp. 36–44 Read article
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Bandwidth and Return Loss Enhancement in Patch Antenna by Meta Material using at 2.62 GHz
Abstract: In this work, a rectangular micro strip patch antenna (RMPA) loaded with “Symmetric square Shapes Four Segments with circular rings structure” metamaterial structure is designed at a height 3.2 mm from ground plane by using CST-MWS software. The resonance frequency of the designed antenna is 2.62 GHz. The 10 dB impedance bandwidth of proposed antenna is increased up to 78.3 MHz. The return loss of the proposed antenna reduced to …
Published in Journal of Microwave Engineering and Technologies · Vol. 1, Issue 3, 2014 · pp. 33–37 Read article
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Cylindrical Dielectric Resonator Antenna With Rectangular Patch
Abstract: DRAs are used for 5G communications of huge bandwidth from millimeter to Terahertz. high facts charge is performed through the channel ability i.e. C=Blog2(1+SNR) where C is the channel capacity and B is the bandwidth of the channel. The cylindrical resonator antenna operating in hybrid HEM11 mode. in this paper a cylindrical dielectric resonator antenna (CDRA) with frequency range (26GHz).The cylindrical dielectric resonator with radius r=1.45mm and height h=1.4mm. the …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 1, 2022 · pp. 9–15 Read article
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A Novel Antenna Design based on a Single UC-PBG Layer of High Gain for Wireless Power Transfer
Abstract: In this study, a brand-new, highly effective antenna design is put forth to provide a directional radiation pattern with a small beam width for wireless power transfer. The proposed antenna is constructed from a cross-shaped patch of square holes. A favorable eclipse is paired with the antenna patch to provide circular polarization-symmetrical radiation. A symmetrical quadrature stare-shaped unit cell has a uniform compact photonic bandgap layer (UC-PBG) on top of …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 3, 2022 · pp. 8–19 Read article
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A Compact CPW-fed Quadruple-band-notched Antenna with Concentric Annular-rings for UWB Applications
Abstract: In this paper, a compact coplanar waveguide (CPW)-fed quadruple-band-notched antenna with concentric annular-rings for ultra-wideband (UWB) applications is presented. The proposed antenna consists of four concentric annular-ring resonators, a circular shape radiating element and a CPW feed line. The quadruple band rejection is easily achieved by controlling the widths and radii of four concentric annular-ring resonators. Through the exception of four stop-bands at 3.29 to 3.7 GHz, 5.07 to 5.92 …
Published in Journal of Microwave Engineering and Technologies · Vol. 10, Issue 2, 2023 · pp. 38–47 Read article
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An Experimental Study on the Effect of Tensile Properties and Hardness of AA6082-T6 under the Heat Treatment Conditions
Abstract: AbstractIn the present study, the experiments were performed to investigate the effect of heat treatment parameters viz. soaking time and temperature on the tensile properties and hardness of Aluminium alloy (AA) 6082-T6 sheet. The sheet was heat treated and cut the standard tensile specimen ASTM E8M-04tofind out the tensile properties and hardness value at different temperature with respect to different soaking time. Air circulation oven type electric furnace was used …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 3, 2018 · pp. 36–41 Read article
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Design and Simulation of Improved Multilevel Inverter For Solar Photovoltaic Applications
Abstract: The energy is extending rapidly, anyway will stand up to the modernization of India and fiscal turn of events, further reviving the pace of the test, especially considering the improvement of India's basic amassing approach needs. Starting late, influence age has extended rapidly, yet the business is filled by neighborhood dispersion associations, circulation frameworks and transmission frameworks, and the cash related condition is moderate and convincing. The display of photovoltaic …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 2, 2020 · pp. 34–46 Read article
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Optimizing the Integration of Photovoltaic and Wind Energy Systems for Enhanced Efficiency
Abstract: This work provides a novel approach for integrating a large-capacity doubly excited induction generator (DFIG)-based wind energy system with solarphotovoltaic (PV). The suggested plan offers a practical PV-grid integration solution by utilising DFIG’s grid and rotor side power converters to pump PV power into the grid. This eliminates the requirement for a separate converter for PV power processing. Compared to a comparable rated inverter utilised in traditional PV-grid systems, the …
Published in Journal of Power Electronics and Power Systems · Vol. 13, Issue 2, 2023 · pp. 34–52 Read article
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Breathing prediction of fracture deviated wellbore through flooding mechanism
Abstract: Wellbore breathing is a common occurrence during drilling operations, but the down hole mechanism and how it manifests itself in surface and subsurface processes, is not well understood. It often result in a drilling fluid gain at surface and are misidentified as a kick, resulting in unneeded shut in periods and associated non-productive time (NPT). Further, misidentification of wellbore breathing as underbalance often results in increases in mud weight, which …
Published in Journal of Petroleum Engineering & Technology · Vol. 9, Issue 2, 2019 · pp. 5–13 Read article
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A Comparative Analysis of Physio-Chemical Properties of Local and Imported LPG On the Ghanaian Market
Abstract: Lignified Petroleum Gas (LPG) is gaining much usage as a fuel globally including Ghana.According to the Ghana 2021 Population and Housing Census, LPG as a main source of cooking fuel increased from 18.2% in 2010 to 36.9 % in 2021. LPG in circulation is produced from three main sources. These are from Tema Oil Refinery (TOR), Ghana National Gas Company (GNGC) and from Imports (IM). However, there are been some …
Published in Journal of Petroleum Engineering & Technology · Vol. 12, Issue 3, 2022 · pp. 38–42 Read article
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Castellated Beams with and without Stiffeners- A Review
Abstract: Use of castellated beams has it benefits like it is economical, gives more strength with less material, easy to erect. Studies related to castellated beam show that quantifiable reduction in the weight of structure is accomplished by allowing web openings without reducing structural strength or requirements of serviceability. Castellated beams are fabricated by cutting I section in zig zag pattern to create shapes like hexagonal, circular, rectangular and re-joining it …
Published in Journal of Structural Engineering and Management · Vol. 6, Issue 2, 2019 · pp. 13–18 Read article
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Investigation of Web-Hole Effect on Web Crippling Strength of Cold Formed Channel Section
Abstract: This paper presents an experimental, theoretical and numerical investigation on lipped channel sections with circular web holes subjected to two loading conditions as specified in the American specifications for cold formed steel structures, namely, interior-two-flange and end-two-flange. For interior-two-flange, the web holes are provided (i) at center beneath bearing plate and (ii) at offset distance. For end-two-flange, web holes are provided at (i) center beneath bearing plate and (ii) 1/4th …
Published in Journal of Structural Engineering and Management · Vol. 2, Issue 2, 2015 · pp. 6–12 Read article
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Parameteric Equation Development for Cutting Cost vs Depth of Cut for Multi Blade Granite Block Cutting Machine
Abstract: The stone processing industry has a very huge market in world. There is only three basic need of a human i.e. food, clothes and shelter, where stone covers big part of shelter, hence the requirement is also high. Basically most of the stone processing industries in India are small scale industry. The basic detail about the stone cutting machine is discussed and along with that parametric equation for relation between …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 5, Issue 1, 2018 · pp. 8–14 Read article
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Atomizers in spray dryers: a review
Abstract: Atomization is the most important step in spray drying that defines the properties of liquid droplets after spraying, resulting in various forms of the dry product - from fine powders to granules. It basically refers to the disintegration of the liquid into droplets in the presence of a drying gas circulating in the medium, increasing its surface area until the droplet becomes unstable and disintegrates. The choice of the atomizer's …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 1, 2021 · pp. 1–15 Read article
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Design and Validation of Slot Coupled Rectangular Half Mode SIW Antenna
Abstract: This paper presents the design and performance analysis of a Rectangular Half Mode Substrate Integrated Waveguide (HMSIW) antenna configuration to attain higher gain and multiband characteristics with the compact size. It is possible to produce multiband properties by placing variously shaped slots on the top of the patch and ground surface. To attain the necessary gain and multiband resonance characteristics, the type of the slot, dimension optimization, and position optimization …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 10, Issue 2, 2023 · pp. 14–21 Read article
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Water Loss Management using EPANET
Abstract: Human beings need water in every aspects of life. Universally, numerous nations are wrestling with the problem of expanding water interest and reducing water assets. This makes it basic to utilize accessible water productively and to lessen water misfortunes. But the water suppliers around the world are facing the water loss management issue. Keeping that in mind, development of sustainable water loss management system is also very much necessary. This …
Published in Journal of Water Resource Engineering and Management · Vol. 8, Issue 3, 2021 · pp. 64–69 Read article
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Effect of Water Table Position on the Stability of Tunnel
Abstract: Tunnel is an underground structure used to convey the traffic. Construction of a tunnel in rock is a difficult task. In instances where tunnels are situated at shallow depths, the stability of the tunnel and its lining is notably affected by the adjacent surcharge loadings resulting from new building constructions or excessive loads on the ground surface. Stability of the tunnel crest also depends on the position of the water …
Published in Journal of Water Resource Engineering and Management · Vol. 10, Issue 3, 2023 · pp. 6–11 Read article
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Delay factors in construction projects effecting cost & time
Abstract: In construction industry one of the most common problems are cost over-run and delay. Delay can be minimized with the help of optimal scheduling techniques with the help of scheduling software’s. Delay means we are not meeting the deadline on time which results cost and time overrun. For the economic development of India construction segment is one of the sectors that provides important component. It is considered one of the …
Published in Recent Trends in Civil Engineering & Technology · Vol. 8, Issue 3, 2018 · pp. 6–13 Read article
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Comparative study of various castellated beams with and without stiffeners
Abstract: use of the castellated beams has its own benefits as its reasonable gives additional strength by almost the same amount of material easily erectable. Studies associated with them demonstrate that quantifiable reduction in the weight of the structure is accomplished by allowing web openings without reducing structural strength or necessities of serviceability. They are made-up by cutting I section in the zigzag design to make shapes like circular hexagonal rectangular …
Published in Recent Trends in Civil Engineering & Technology · Vol. 9, Issue 2, 2019 · pp. 5–10 Read article
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Pervious Concrete-A Tool for Sustainable Pavement Technology: A Review
Abstract: Our planet earth is on its path to a deadlock due to its present-day development strategies. In the present scenario soaring pressure for the application of green technologies in developments to protect the nature from the adverse effects of construction industries have been endeavored by the goal of sustainable development and advancement in environmental management. Worldwide construction industries are geared towards Green concrete construction and sustainable development techniques. As a …
Published in Recent Trends in Civil Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 12–17 Read article