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386 articles for “Reflectance”
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Circularly Polarized Microstrip Fed Antenna for Dual Frequency
Abstract: Abstract: The presented antenna is designed for achieving dual frequency characterized circularly polarized behavior. The achievement of dual frequency is done by coupling of the microstrip feed line arrangement with the annular slot shaped with four unequal arms type of slot structure on the patch. The Reflection coefficient, pattern of radiation of the antenna and the Axial ratio are simulated. The impedance bandwidths obtained for lower of (RHCP) is 25% …
Published in Journal of Microwave Engineering and Technologies · Vol. 6, Issue 1, 2019 · pp. 1–5 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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Review Paper of Designing of CPW Fed Micro-strip Patch Antenna for UWB and Bluetooth Application
Abstract: A compact size coplanar waveguide (CPW)-fed micro strip antenna is proposed for radiation of the frequency spectrums 2.36 to 2.49 GHz (Bluetooth) and 3.1 to 10.6 GHz (UWB-Ultra wideband) covers. Both are unlicensed bands but in UWB band there are two licensed bands i.e. WLAN and Wi-MAX present in the frequency range of 5.12 to 5.825 GHz and 3.4 to 3.7 GHz respectively. In this design we have single CPW-fed …
Published in Journal of Microwave Engineering and Technologies · Vol. 3, Issue 1, 2016 · pp. 35–40 Read article
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Study of Effect of Various Dielectrics on the Performance of Electromagnetic Bandgap Based Microstrip Patch Antenna Structure
Abstract: Here the effect of various dielectrics on the performance of microstrip patch antenna with underlying electromagnetic bandgap structure is investigated. This unique antenna structure suppresses the surface waves and reflects plane waves with no phase change and thus acts as a perfect magnetic conductor (PMC). Dielectric losses are reduced due to the presence of EBG structure and bandwidth enhancement is observed when compared to the non-EBG structure. The effect of …
Published in Journal of Microwave Engineering and Technologies · Vol. 2, Issue 2, 2015 · pp. 13–18 Read article
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Rectangular Patch Monopole Antenna with Different Shaped Multiple Slots for Triple Band Frequency Applications
Abstract: In this paper a rectangular patch microstrip antenna with different shaped multiple slots behaves as a triple band monopole antenna. It is designed for 0.96031–1.0464, 1.3766–1.5797 and 2.1629–2.3708 GHz frequency bands. A rectangular patch monopole antenna with multiple slots, i.e., hexagonal slot and rectangular slot is fabricated on the glass epoxy (FR4 lossy) of dielectric substrate with relative permittivity (εr) of 4.4, thickness of 1.6 mm, loss tangent of 0.02 …
Published in Journal of Microwave Engineering and Technologies · Vol. 1, Issue 2, 2014 · pp. 17–24 Read article
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Analysis of Braggs Grating for photonics application
Abstract: The plane wave expansion approach was used to optimise reflectance in a Braggs grating on a silicon on insulator structure at wavelength 1.55µm. When the results were compared to the experimental results, it was discovered that they agreed better than any other present results. Aside from the inherent benefits of FBGs, such as low cost, low losses, polarisation insensitivity, and full compatibility with fiber-optic systems, they have demonstrated that by …
Published in Journal of Microwave Engineering and Technologies · Vol. 9, Issue 1, 2022 · pp. 32–35 Read article
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Experimental Setup to Determine Stress Wave Propagation in a Compound Bar
Abstract: Deformation undergone by a body due to impact results in development of dynamic stresses. This deformation depends on the material properties and geometry. Advancements made in stress wave propagation are focused at the necessity to understand dynamic history of structures subjected to applied loads. Stress travels with different velocities in different bodies depending upon material characteristics, crystal structure etc. Forces applied on bodies at short intervals of time result in …
Published in Journal of Materials & Metallurgical Engineering · Vol. 8, Issue 2, 2018 · pp. 1–6 Read article
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Results of Thermal and Electric Field Influences on Cholesteric Liquid Crystals and their Application in new Technologies
Abstract: A significant achievement of recent decades is application of cholesteric liquid crystals in modern optical technologies. Cholesteric liquid crystals (ChLC) have unusual, and in some cases unique properties compared to traditional optical materials - the possibility of smooth and local control optical characteristics of the medium: light transmission, light scattering, polarization, refraction, reflection, absorption light, and color parameters. This control can be carried out electrical, light signals, mechanical, thermal, magnetic …
Published in Journal of Microelectronics and Solid State Devices · Vol. 8, Issue 2, 2021 · pp. 15–23 Read article
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Studies on two recently commercialized scintillators for gamma-ray spectroscopy and imaging
Abstract: The present work is aimed to study some characteristics of the two recently commercialized CRY18 and CRY19 crystals (Crytur, Cz), namely the elemental compositions, and the suitability of a TiO 2 -based white-pigment as light-reflector around the blind faces of the scintillators. The energy dispersive X-ray fluorescencetechnique has been used for the first goal while the second one has been performed by comparing the emission spectrum of the first crystal …
Published in Journal of Nuclear Engineering & Technology · Vol. 12, Issue 2, 2022 · pp. 24–32 Read article
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Beyond Conventional: Nanostructures as Key Enablers for Efficiency Enhancement in Thin Film Photovoltaics
Abstract: One of the key options for lowering the cost of photovoltaic production through the reduction ofactive material utilisation is thin-film solar cells. However, thin film solar cells' performance may beconstrained by low light absorption brought on by a low absorption coefficient or by an inadequatelythick active layer. Minimising expenses and increasing overall efficiency in thin-film solar cells needimproving light absorption that can be converted into electrical power. As a result, …
Published in Journal of Nuclear Engineering & Technology · Vol. 13, Issue 1, 2023 · pp. 37–43 Read article
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Optical and Microstructural Changes in 5(6)-Carboxyfluorescein Doped PVA
Abstract: AbstractThe effect of 5(6) Carboxyfluorescein dye on microstructural and optical properties of a Poly(vinyl alcohol) (PVA) have been studied by using FTIR and UV-Visible absorption techniques. FTIR spectral result shows the possible interaction between the dye and PVA. The UV-Visible spectra shows three absorption bands (around 227nm, 310nm and 450nm) and from the observed optical band edges in the UV-Visible spectra, three optical band gaps and three activation energies for …
Published in Journal of Polymer & Composites · Vol. 4, Issue 3, 2016 · pp. 45–51 Read article
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The Electromagnetic Transients in Mixed Power Networks with Partial Undergrounding
Abstract: This paper deals with the electromagnetic transients in partially undergrounded mixed high voltage power networks. These networks can include several cable sections replacing parts of the overhead transmission lines. The analysis yields the transient voltage and current distributions along the normal and the partially undergrounded lines. Moreover, the results can indicate eventually existing localized voltage and current concentrations within the network. The study suggests an exact direct analytical distributed parameter …
Published in Journal of Power Electronics and Power Systems · Vol. 7, Issue 2, 2017 · pp. 1–13 Read article
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Design Parameters of Three-phase Self-excited Induction Generator for Desired Performance under Unbalanced Operations
Abstract: Self-excited induction generators are widely used for power generation using wind energy in remote and windy locations. However, the load in such generating units may become unbalance and sometimes the excitation capacitance may be unbalance due to aging effect or manufacturing tolerance. All this reflect a strong need for the analysis of such machines under unbalanced operations. In this paper, proposed model as presented has been framed in order to …
Published in Journal of Power Electronics and Power Systems · Vol. 4, Issue 1, 2014 · pp. 1–12 Read article
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Signal Integrity Analysis of Single Walled Carbon Nano Tube based Interconnects at 32 nm Technology Node
Abstract: The rising demands for ultra-high-speed processors and portable devices have made the transistor and interconnect scaling a challenging issue in present days. In this work, the impedance parameter of copper and CNT based interconnects are calculated at 32 nm technology node for different lengths. The performances of CNT based interconnects are analyzed and compared with Cu based interconnects in terms of crosstalk. The conventional copper interconnects are not able to …
Published in Journal of Semiconductor Devices and Circuits · Vol. 5, Issue 1, 2018 · pp. 33–42 Read article
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Improved Automated Car Parking System
Abstract: This research proposed an improved automated car parking system designed to minimize the area or control the influx of cars into a car park using a smart medium. The major problems of the car parking system are lack of authentication and validation system, no accurate detecting measures of the presence of cars and no proper measures for car security against car theft. However, the improved automated car parking system is …
Published in Journal of Semiconductor Devices and Circuits · Vol. 9, Issue 2, 2022 · pp. 17–27 Read article
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Modelling and Electrical Characterization of Single Electron Transistor
Abstract: A nano-electronic device with low power consumption, high performance, and quantum effects is the single electron transistor (SET). It's used in charge sensor applications, infrared radiation detectors, and spectroscopy. However, it faces limitations in lithography, co-tunneling effect, low gain, high output impedance, and background charges. Therefore, prior simulation is needed to optimize SET's work function and understanding physics concepts. A master equation approach is used to propose a new model …
Published in Journal of Semiconductor Devices and Circuits · Vol. 10, Issue 3, 2024 · pp. 19–25 Read article
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Effect of Sol-Gel Coating on Fire Performance and Optical Properties of Wood Panels
Abstract: Investigates the impact of sol-gel coating on the fire performance and optical properties of wood panels.SEM, EDX, and infrared spectroscopy with the Fourier transform were used to characterize the sol-gel coating, which was put on to the wood panels using a dip-coating technique. The fire performance of the coated and uncoated wood panels was evaluated by measuring the ignition time, flame spread rate, and total heat release rate. The optical …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 1, 2023 · pp. 20–24 Read article
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A Parametric Study of Methylene Blue Adsorption Using Low-cost Adsorbent
Abstract: This research focused on the adsorptive capacity of activated carbonaceous substance made from the peel of Spanish cherries to remove methylene blue dye from wastewater. Through batch adsorption tests, the impact of several variables on the percentage of dye removal was examined. These variables included adsorbent preparation temperature, adsorbent dosages, initial concentration of dye solution, process time, pH of dye solution, and operation temperature. It was found that using 1 …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 10, Issue 3, 2023 · pp. 10–16 Read article
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A Circular Slot Loaded H-Shaped Printed Microstrip Patch Antenna for Lower Band 5G Applications
Abstract: Abstract: A circular slot loaded H-Shape patch antenna is introduced in this paper. A circular slot loaded H-Shape patch antenna is fed with coplanar wave guide (CPW) is discussed which is applicable for lower band 5G applications. The radiation pattern is omni-directional which is very near to H-plane. The area of ground plane is 80×101×1.5 mm3 with substrate material having dielectric constant 2.2 and loss tangent 0.002 is used. The …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 6, Issue 1, 2019 · pp. 9–14 Read article
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E-Shaped Microstrip Patch Antenna for High Speed Wireless Local Area Network (WLAN) Applications
Abstract: A microstrip antenna consisting of E-shape radiating patch having low profile, probe-fed is designed and proposed for wireless local area networks (WLAN) applications. All countries use different WLAN, as the antennas available are not able to cover all the standards. This study aims to design a smallest antenna with better polarization covering all high speed WLAN standards ranging from 4.47 to 5.82 GHz. The patch antenna designed on low cost …
Published in Journal of Telecommunication, Switching Systems and Networks · Vol. 4, Issue 1, 2017 · pp. 1–5 Read article