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52 articles for “phase shift”
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Design of Passive Phase Shifter for Beam Steering Applications
Abstract: The role of phase shifters in the field of beam steerable antennas is vital. The paper presents a navel technique in designing of phase shifters. This technique is facilitating many advantages along with phase shifting, such as reducing mutual coupling between array antenna elements results reduction in overall antenna size and miniaturize the radiating antenna aperture. This structure also shields the components behind the antenna. This method helps in eliminating …
Published in Journal of Microwave Engineering and Technologies · Vol. 1, Issue 3, 2014 · pp. 26–32 Read article
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Design and Implementation of Phase Shift Full Bridge DC-DC Converter for Photovoltaic Application
Abstract: Soft switched converters offer merits like lowered switching losses, reduced size of magnetic devices, lowered converter size, etc. Therefore, it is preferred topology in converter’s design. It also allows use of higher switching frequency. This research work focuses on development of 1 kW prototype of phase shift full bridge DC-DC converter for photovoltaic application. This paper discusses component selection criteria, magnetic component design criteria, hardware and software design issues. Simulation …
Published in Journal of Control & Instrumentation · Vol. 7, Issue 3, 2016 · pp. 21–27 Read article
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PWM Technique based evaluation and performance analysis ofZVS Based Resonant Converter
Abstract: A Zero Voltage Switching (ZVS) based Resonant Converter (RC) has been simulated and the performanceis analyses in this paper. A ZVS based resonant converter working under load independent output voltage and no-load regulation is presented in the paper.Pulse width modulation (PWM) is a technology used to regulate outputvoltage. The major transitions of a full-bridge converter that achieves zero-voltage switching across the whole lineand load range by using a linked inductor …
Published in Journal of VLSI Design Tools and Technology · Vol. 12, Issue 2, 2022 · pp. 42–48 Read article
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Perfluorinated Composites for Optical Fiber Development for Optical Communications
Abstract: Free Space Optical (FSO) communication is a new generation of high-speed technology that utilizes light as the carrier to transfer information through free space, e.g., air, outer space, and vacuum. In comparison with traditional systems of communication, FSO offers a wonderful bandwidth advantage with less cost and ease of installation. This study compares the performance of two other FSO systems using advanced polymer composites such as Perfluorinated polymers in designing …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 661–674 Read article
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Styrene, Carbonate Materials to Minimize Aberration in Free Space Optical Communications
Abstract: Enhancing wireless connectivity, particularly in harsh weather circumstances, is possible through the use of polymer-based materials in Free Space Optical (FSO) communication systems. In the production of optical components like lenses, beam shapers, and protective enclosures for FSO transmitters and receivers, polymers are being used more and more because of their lightweight, affordable, and adjustable optical qualities. This study examines how well a polymer-integrated FSO link performs over 1–10 km …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 675–686 Read article
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BER Performance of Hybrid 2×8 SCM/WDM System Based on Raman Amplifier
Abstract: AbstractWhen subcarrier multiplexing (SCM) is combined with wavelength division multiplexing (WDM) the resultant hybrid multiplexing strategy can benefit from readily available commercial components. Hybrid SCM/WDM systems are quite useful for LAN and MAN applications. They can provide broadband integrated services to the subscriber. This paper investigates the performance of two module SCM transmitter that consist of eight binary phase shift keying modulated data streams each transmitted at a speed of …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 1, 2016 · pp. 1–7 Read article
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Performance of NRZ and Manchester DPSK Downstream and Upstream OOK for WDM-PON
Abstract: AbstractA novel data re-modulation scheme with downstream. Differential phase shift keying (DPSK) signals and on-off keying (OOK) upstream signal modulation format is proposed for wavelength-division multiplexing (WDM) – passive optical networks (PON) in the letter. A simulation on 5-Gb/s downstream optical DPSK signal and 5 Gb/s upstream optical OOK signal. 5Gb/S on DPSK OOK all are successfully demonstrated over 20-km single mode fiber without chromatic dispersion compensation.Keywords: Differential phase-shift keying …
Published in Trends in Opto-electro & Optical Communication · Vol. 7, Issue 1, 2017 · pp. 6–9 Read article
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Performance Study in Modified DPSK, MZI Delay Mismatch at 40Gbps Fiber Dispersive Channel
Abstract: AbstractHigher data rate transmission is a desirable feature for the communication system in every era. As they have potentially higher fiber capacity, also have lower cost per bit. This paper presents performance investigation with partial differential phase shift keying and influence of MZI delay mismatch in the high data rate dispersive channels. Ideal fiber braggs grating is considered as fiber dispersive medium with different dispersion. Numerical simulation depicts that in …
Published in Trends in Opto-electro & Optical Communication · Vol. 6, Issue 2, 2016 · pp. 18–23 Read article
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Performance Analysis of Space Shift Keying and Quadrature Space Shift Keying for MIMO Channels
Abstract: In wireless communication the propagation channel is characterized by multipath propagation due to scattering on different obstacles. MIMO takes advantage of multi-path and uses multiple antennas to send multiple parallel signals from transmitter. “Multi-path” occurs when different signals arrive at the receiver at various times. MIMO exploits the space dimension to improve wireless systems capacity, range and reliability. There are two different modulation techniques that exploits the best features of …
Published in Research & Reviews : Journal of Space Science & Technology Read article
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A New Nine Level Hybrid Multilevel Inverter
Abstract: Multilevel inverters (MLI’s) have been used widely for high power and medium power DC-AC conversion. Researchers are working to reduce total effective cost and enhance the working efficiency of the multilevel inverter. This paper presents a new multilevel hybrid inverter which utilizes eight active powers electronics switches along with asymmetric DC voltage source configuration to synthesize 9-level waveform and produces lower total harmonic distortion (THD) profile comparisons to present typical …
Published in Trends in Electrical Engineering · Vol. 6, Issue 1, 2016 · pp. 17–25 Read article
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Self-Compensation of Commutation Phase Error for Brushless DC Motor
Abstract: BLDC motors are synchronous motors powered by DC electricity via an inverter which produces an AC electric current to drive each phase of the motor via a closed loop controller. Electronic commutation is the on-and-off of the semiconductor switches at appropriate time to turn stator windings. Commutation phase ripple is generated due to the different exchange rate between outgoing phase current and incoming phase current of inverter during commutation period. …
Published in Trends in Electrical Engineering · Vol. 8, Issue 3, 2018 · pp. 72–81 Read article
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Low Power RF QPSK MODEM Design
Abstract: System-level simulation including design of CMOS circuits for radio frequency QPSK MODEM targeting applications in 2.45 GHz industrial, scientific and medical (ISM) band has been presented in this paper. Based on the QPSK architecture, the MODEM consists of an analog mixer using a voltage multiplier, a 90 °phase shifter, delay circuits, a voltage adder and a filter to detect the information. A code reuse subsystem block consisting of Chebyshev filter …
Published in Journal of VLSI Design Tools and Technology · Vol. 2, Issue 1-2-3, 2012 · pp. 75–86 Read article
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Total-internal-reflection-based optical rotation quasi-phase-matching for efficient second-harmonic generation in Cadmium Germanium Arsenide crystal
Abstract: This study investigates a total-internal-reflection (TIR)-based optical rotation quasi-phase-matching (ORQPM) approach for second harmonic generation within a cadmium germanium arsenide crystal slab. The crystal is coated with a thin film of yttrium oxide to facilitate precise control over phase shifts between p- and s-polarized light upon reflection at the slab-film interface. By leveraging the interplay between TIR- induced optical rotation and fractional QPM effects at designated bounce points, the configuration …
Published in International Journal of Crystalline Materials · Vol. 3, Issue 1, 2026 · pp. 01–09 Read article
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Signal Transmission in Underwater Using Passive Time Reversal for Single and Multiuser
Abstract: This paper describes passive time reversal communications, which enables multiple users to send information simultaneously to the time reversal array. Experimental results at 3.5 kHz with a 1 kHz bandwidth demonstrate that as many as six users can transmit information over a 4 km range in a 120 m deep water using quaternary phase-shift keying (QPSK) modulation, achieving an aggregate data rate of 6 kb/s. Moreover, the same data rate …
Published in Current Trends in Signal Processing · Vol. 6, Issue 2, 2016 · pp. 49–54 Read article
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Spike Detection and Processing of TDEM Signals using Wavelet Transform
Abstract: This paper presents a new method for spike detection, parameterization and processing in ground based Time Domain Electromagnetic (TDEM) signals. Time Domain Electromagnetic methods are used for mineral exploration by sub-surface conductivity measurement of Earth. The Earth’s response measured using inductive sensors are contaminated by spikes in form of sferics and due to load and phase shift in power distribution lines. The spikes present in the measured signal can significantly …
Published in Current Trends in Signal Processing · Vol. 2, Issue 1-3, 2012 · pp. 82–92 Read article
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Designing of OFDM and FBMC System using QAM and QPSK Modulation Technique
Abstract: AbstractThe Fourth generation (4G) and Fifth generation (5G) are the new evolution of the mobile communication system. The fourth generation had been launched in almost all countries and the 5G is very soon launched in many countries. In India, the 5G is launched in the years of 2020s. In this article, we hut the light on the potential and implementation on the multicarrier technology system which is the 5G based …
Published in Journal of Electronic Design Technology · Vol. 9, Issue 3, 2018 · pp. 24–29 Read article
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Circuit Topologies, Operation, Control Schemes and Modulation Techniques of Modular Multilevel Inverter
Abstract: The Modular Multilevel Converter (MMC) is one of the developing topology. MMC has several attractive features such as a modular structure, transformer-less operation, easily scalable in terms of voltage and current, low expense for redundancy and fault tolerant operation and excellent output waveforms quality. Due to these attractive features industry and researcher increased the interest in this converter. This interest results in the development of new power topologies, modulation strategies …
Published in Journal of Power Electronics and Power Systems · Vol. 7, Issue 1, 2017 · pp. 28–40 Read article
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Application and Limitation of Metal Thermochemical Processing
Abstract: The technically intriguing and monetarily feasible technique for enhancing the surface layer of materials is surface engineering. The aim is to establish a vast scope of useable attributes that are separate from the core substrate, together with physical, chemical, electrical, electronic, magnetic, or mechanical, even though the material surface monitors the operational life throughout many implementations. The thermochemical intervention, a type of surface engineering, uses heat diffusion to incorporate non-metal …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 3, 2022 · pp. 25–29 Read article
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Power Quality Enhancement in Distribution System using D-STATCOM
Abstract: New solutions based on power electronics have been developed to safeguard commercial and industrial clients against power quality issues on the electrical distribution system, referred to as Custom Power Products. Custom power devices are classified into three categories by their structures such as dynamic voltage regulator (DVR), distribution static compensator (STATCOM) and unified power quality compensator (UPQC).The Distribution Static Compensator (D-STATCOM), one of the custom power product, is a shunt-connected …
Published in Recent Trends in Electronics Communication Systems · Vol. 8, Issue 2, 2021 · pp. 17–22 Read article
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A Review on STATCOM Controller for Power Quality Enhancement in Distributed System
Abstract: New technologies, using power Electronics-based concepts, have been Developed to provide protection for Commercial and industrial customers from Power quality problems on the electrical Distribution system known as Custom Power Products. Custom power devices are classified into three categories by their structures such as dynamic voltage regulator (DVR), distribution static compensator (STATCOM) and unified power quality compensator (UPQC).The Distribution Static Compensator (D-STATCOM), one of the custom power product, is a …
Published in Trends in Electrical Engineering · Vol. 11, Issue 2, 2021 · pp. 24–29 Read article