Efficiency Improvement of WCDMA Base Station Transmitters using Class-F power amplifiers


Muthuswamy Venkataramani



(ABSTRACT)
Universal Mobile Telecommunications Systems (UMTS) is the preferred third generation (3G) communication standard for mobile communications and will provide worldwide coverage, a convenient software technology and very high data rate. The high data rate, especially, requires the use of bandwidth-efficient modulation schemes such as Quadrature Phase Shift Keying (QPSK). But ....etc

[:=Read Full Message Here=:]

i am 8th sem BE student ,i want to ppt of High Efficiency Miller Cycle Gas Engine,what is the small explanation of High Efficiency Miller Cycle Gas Engine =medium] ....etc

[:=Read Full Message Here=:]

digrams regarding the topic ....etc

[:=Read Full Message Here=:]

i am rahul , doing M.Tech from SVNIT surat. i know the basics of EGR of gas turbine engines. i want the full project report ....etc

[:=Read Full Message Here=:]

The gas turbine has been an enormously successful power plant for aircraft and marine propulsion, and electric power generation, due to its lightweight, smooth and reliable operation, low emissions, and varied applications. Nevertheless, it is not very efficient in converting fuel energy to useful work, due to fundamental thermodynamic limitations imposed by turbo machinery technology.

In recent years, there is renewed interest in the potential high efficiency of alternative thermodynamic cycles and unsteady combustion systems for propul ....etc

[:=Read Full Message Here=:]

submitted by :-
Suhail ahmad mansoori


INTRODUCTION
A boiler is an enclosed vessel that provides a means for combustion heat to be transferred into water until it becomes heated water or steam. The hot water or steam under pressure is then usable for transferring the heat to a process. Water is a useful and cheap medium for transferring heat to a process. When water is boiled into steam its volume increases about 1,600 times, producing a force that is almost as explosive as gunpowder. This causes the boiler to ....etc

[:=Read Full Message Here=:]

....etc

[:=Read Full Message Here=:]

....etc

[:=Read Full Message Here=:]

IMPROVEMENT OF THERMAL EFFICIENCY BY RECOVERY OF HEAT FROM IC ENGINE EXHAUST
(THERMAL SCIENCES)
CONTENTS:
1. ABSTRACT
2. INTRODUCTION
3. PRINCIPLE OF HEAT RECOVERY FROM IC ENGINE
4. NECESSITY OF THERMAL STORAGE SYSTEM
5. LATENT HEAT THERMAL STORAGE SYSTEM
6. EXPERIMENTAL SETUP
7. RESULTS AND DISSCUSSIONS
8. PERFORMANCE CHARACTERISTICS STUDY
9. CONCLUSION
IMPROVEMENT OF THERMAL EFFICIENCY BY RECOVERY OF HEAT FROM IC ENGINE EXHAUST
ABSTRACT
The steady increased consumption of fuel and power over the years have ....etc

[:=Read Full Message Here=:]

Abstract-
A pulse skipping control strategy is proposed to improve efficiency of grid-tied inverters at light loads. To maximize the efficiency of pulse skipping operation mode, three key parameters are identified and optimized based on a loss model, which is developed to find the maximal efficiency points using a three-dimensional search technique. A 200W prototype inverter was setup to verify the proposed control strategy. The experimental results show that the proposed pulse skipping control strategy greatly impr ....etc

[:=Read Full Message Here=:]