Vol 3 Issue 1 January 2015-March 2015

Abstract: designing a mux for low power to use it as a repetitive block in the barrel shifter will considerably reduce the simulation time .our basic objective is to compare existing 2:1 multiplexers with proposed multiplexer design in term of power consumption, temperature sustainability, noise immunity and frequency, so that a fast and optimized barrel shifter can be designed by the help of it.a 2:1 multiplexer is a basic building block of the “switch logic”. The multiplexer circuit is typically used to combine two or more digital signals onto a single line, by placing them there at different times. Technically, this is known as time-division multiplexing. Multiplexers can also be used as programmable logic devices. By specifying the logic arrangement in the input signals, a custom logic circuit can be created. The selector inputs then act as the logic inputs. This is especially useful in situations when cost is a factor and for modularity. The increasing prominence of  portable systems and need to limit power consumption has led to rapid and innovative developments in low power vlsi design during recent years. The driving forces behind these developments are portable device applications requiring low power consumption and high throughput due to their small chip size with large density of components, increased complexity and high frequencies.

Keyword: power consumption and temperature.

Title: Design Strategy for Barrel Shifter Using 2:1 Mux at 45 Nm And 90 Nm Technology Nodes

Author: Amrita Pahadia, Deepak Yadav

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: A Design of compact Multiple-Input-Multiple-Output (MIMO) Microstrip Patch Antenna that has 4 ports, been designed and implemented. The proposed antenna consists of four ports with two patches operates at LTE frequencies (1.8, 2, 2.6) GHz and two Patches operates at WLAN frequency (2.4) GHz. The antenna is fabricated on an inexpensive FR4 a dielectric constant ofε = 4.4, loss tangent of tan δ=0.019, with thickness of substrate that is 1.6-mm and the thickness of patch is 0.035 mm. The measured results represents that the proposed antenna obtained a reasonable bandwidth for LTE and WIFI applications defined by 10-dB return loss. Furthermore, The S Parameters of antenna are simulated and measured. In this project, design structure of the MIMO antenna four ports and substrate has been employed to broaden the bandwidth. Since MIMO antenna, good gain and directivity can be achieved. Simulation by using CST microwave studio program and measurement on the final prototype antenna were carried out and compared. A MIMO system characteristic evaluation of a four port MIMO antenna is performed. A four port antenna for wireless applications is designed, the antenna shows good pattern diversity low correlation coefficient.

Keywords: antenna, MIMO, multiband, return loss.

Title: Compact Multiband MIMO Antenna for Future Wireless Applications

Author: Sarah Hassan Khalaf, Yousif Mohsin Hasan

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: Present design of an incubator uses microprocessor as main controller in digital signal processing combined with complex combinational logic circuit are redundant and needs to be improved in the sense of functionality. Replacement of microcontroller with an PIC controller is prudent action due to its efficiency and reliability especially in an incubator where the life of an infant relies on. A PIC controller has least complex circuitry has to be designed so that it saves space and be more reliable for an incubator. Therefore, it is highly recommended that the PIC controller has reduced circuit complexity and increase the control system action time response. PIC controller is the solution to all the problems since PIC controller offers more efficient, reliable and accurate control.

Keyword: Incubator, PIC Controller, RTD Sensor, Temperature Control, Data Logging.

Title: Temperature Controlled In Infant Incubator

Author: Dhaval Kothiya, Arjun Chauhan, Twinkle Patel, Khushbu Shah, Shweta Patel, Supriya Singamsetty

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: To charge a mobile phone from the DC‐DC converter built, a regulator would need to be used to supply a constant voltage to the phone itself. To supplying 5V to the mobile Phone would be sufficient. The output of the built buck converter should be between 5V and 10 V. These voltages would be low enough to be input to most 5V regulators. It was decided to use a simple 5V linear regulator to perform the task.

This research involves designing a mobile phone charging system and a LED lamp which is powered via a solar panel and that is capable of charging multiple mobile batteries simultaneously. The project also requires research into the different solar panels available for the small scale system being designed, as well as into larger solar panels that may be implemented into a building’s design. Investigations will also have to be made into how the overall system would change if these larger solar panels were implemented. The small scale test system will also be able to display information visually to the user of the system regarding the systems overall capacity to charge at any given time and will also include power management functions.

The goal of this project is to create a multiple output cell phone charger. The cell phone charger is essentially a DC-DC converter. A commercial charge controller IC was sourced that met with the specifications of the project. This is the design method that the final system is based on. It is comprised of a solar panel whose voltage is regulated by a DC‐DC converter. The power management of the solar panel comes in the form of maximum power point tracking (MPPT), which will be discussed in greater detail further on. For this design it entails using an outside controller to control the duty cycle of the DC‐DC converter. It was decided that the DC-DC converter would have to be built in the lab, as it was difficult to find a suitable commercial converter that could be controlled in this way. The output of the converter is then applied to the back‐up battery and the load.                                  

Finally, some implementations of solar charger for portable devices are analyzed, showing drawbacks and benefits for each architecture and a complete integrated solution is proposed.

Keyword: Solar Panel, Mobile Charger, renewable energy, solar energy.

Title: Solar Panel Based Mobile Charger and Small Led Lamp

Author: Md. Musabbir Hossain

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: In the higher institutions of many third world countries, voids exist in the practical implementation of the engineering curriculum. Procuring the standard equipment for laboratory practical and student practice can at times be a financial burden to these institutions. This publication explains a fill to this void; by contributing a Java based Data Communication Simulation Package with which Communication Engineering students can conduct experiments over a Wi-Fi enabled network. These experiments are majorly in the areas of digital filtration, modulation and spectrum analysis.

Keywords: Simulation, Modulation, Spectrum-Analyzer, Filtration.

Title: Design and Implementation of A Java Based Simulation Package for Spectrum Analysis, Digital Filtration and Modulation as A Teaching Aid for Data Communication

Author: Oluwole Oyetoke, Dr. O.E Agboje

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: This paper deals with industrial environment monitoring and device control using ARM. In industries there is need for data acquisition and supervisory control which overcomes human intervention as well as overall efficiency and safety. This system fulfills all these needs. So, the gas filling plants are used to fill, count & deliver gas cylinder ensuring an automated & efficient batch production. In this system, ARM based microcontroller and wireless sensors are used to control the various devices and to monitor the information regarding ZigBee and GSM technology.

Keyword: ARM processor, GSM Module, TCP/IP, Wireless Sensor Network, ZigBee Module.

Title: Industrial Environment Monitoring and Device Control Using ARM

Author: Mrs. Aparna V. Pethkar, Prof. Savita A. Pawar

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: Energy is a necessary and essential ingredient of socio-economic development and economic growth. There are various sources of energy,out of which, wind energy is free and clean renewable source of energy. Wind is caused by differential heating of earth’s surface by the sun. Greenhouse gas emissions per unit of wind energy are approximately 90% less than the emission from conventional fossil fuel power sources. It has been estimated that roughly 10 million MW of energy are continuously available in the earth’s wind. Now, a day’s various types of wind turbines are used for producing electrical energy. Out of which DFIG wind turbine is a variable speed wind turbine. Before, using a wind farm consumer should know about its power drawn capacity of DFIG wind turbine. In this paper, there is a complete analysis of 12 MW wind farm connected with DFIG wind turbine maximum power tracking characteristics curve followed by the simulation model results w.r.to voltage, current and generated power (P and Q).After that graphical results are compared with its mathematical evaluation with its aerodynamic equation. Simulations are done under MATLAB/SIMULINK.

Keywords: Wind energy, doubly-fed induction generator- wind turbine, wind farm, tracking characteristics.

Title: Complete Analysis of Doubly Fed Induction Generator Wind Turbine-Maximum Power Tracking Characteristics

Author: Preeti Chakrawarti, Prof. Preeti Jain

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: This paper presents the systematic procedure of the modeling and simulation of a Distribution STATCOM (D-STATCOM) for power quality problems & maintain the voltage profile based on Sinusoidal Pulse Width Modulation (SPWM) technique. It also explains the problems that are due to poor Power Quality in electrical systems.  In this case, injection of harmonics from power electronics devices into the system also caused some problems which were later overcome by using SATCOM and RLC filters. The obtained results show that STATCOM is very efficient and effective for maintain the voltage profile. It is shown that by using the right technology a variety of Power Quality problems can be solved rendering installations trouble free and more efficient. The major problems dealt here is the voltage sag and swell. To solve this problem, custom power devices are used. One of those devices is the Distribution STATCOM (D-STATCOM), which is the most efficient and effective modern custom power device used in power distribution networks. D-STATCOM injects a current in to the system to correct the voltage sag and swell. STATCOM is one of the key as shunt controllers in flexible alternating current transmission system (FACTS) to control the transmission line voltage and can be used to enhance the load ability of transmission line and extend the voltage stability margin. The control of the Voltage Source Converter (VSC) is done with the help of SPWM. The proposed D-STATCOM is modeled and simulated using MATLAB/SIMULINK software.

Keywords: Distribution STATCOM (D-STATCOM), Power quality problems, Sinusoidal Pulse, Width Modulation (SPWM), Voltage profile, Voltage, Source Converter (VSC), FACTS devices.

Title: Modeling and Simulation of a Distribution Statcom (D-Statcom) For Power Quality Problems

Author: Pushpa Chakravarty, Dr. A.K. Sharma

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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Abstract: The performance of space–time block codes, which provide a better way for transmission over AWGN channels using multiple transmit antennas. It has been shown that a orthogonal design that provides full diversity and full transmission rate for a space–time block code is not possible for more than two antennas. The objective of this paper is to provide the description of different type of space time block codes and to provide the Comparative performance analysis with new different schemes. According to the analysis of existing, transmission matrices of space-time block codes (STBC), we generalize some of their characters and derive new patterns.

Keywords:  MIMO systems, diversity, bit error rate, linear receivers, OSTBC, Q-OSTBC.

Title: BER Analysis of MIMO-STBC Using Various Coding Techniques

Author: Preeti Sharma, Dhawal Beohar

International Journal of Electrical and Electronics Research

ISSN 2348-6988 (online)

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