October 16th, 2008
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The drain characteristics of enhancement type MOSFET is given below.This depicts the variation of drain current(ID)with drain to source voltage(VDS)for different values of gate to source voltage(VGS). The lower most curve is for VGS(Th).When VGS < VGS(Th)drain current is almost zero.When VGS >VGS(Th) the device is ON.As in the case of other FET,the device can [...]
Written by John on October 16th, 2008 with 1 comment.
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ABSTRACT A solar power satellite is a very large-area satellite in an appropriate orbit, which would function as an electric power plant in space. The satellite would consist of three main parts: a solar energy collector, to convert solar energy into dc electric power; a dc-to-microwave converter; and a large antenna array to beam the [...]
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ABSTRACT This paper mainly deal with the global climate change and the environmental problems due to the implementation of thunderstorm solar power satellites.The rapid increase in the global warming due to greenhouse effect need to be considered very much.So a team level planning is made to buildup a layer to safe guard us from these [...]
Written by John on October 16th, 2008 with no comments.
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ABSTRACT The lack of energy sources made man to move to space to meet his energy needs.But two factors makes it difficult, they are cost and environmental pollution.It requires a huge some of money to make any kind of energy producing source in space ,from the studies made so far the most easy method is [...]
Written by John on October 16th, 2008 with no comments.
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ABSTARCT Placing of large number of solar power satellites in space give a solution to the energy crisis faced by the world today.The concept of solar power satellites were deeply studied by DOE(Us department of energy)and NASA in the late 1970s.It was again brushed by a recent NASA mission names”Fresh Look Study” in 1995-97 and [...]
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ABSTRACT Radio waves can benefit the welfare of humanity through other purposes than communications. Microwave power transmission (MPT) is one of the new technological frontiers. Solar power satellites (SPS) will provide a clean and limitless energy resource from space through this technique. This article answers the fundamental question of why we need to develop the [...]
Written by John on October 16th, 2008 with no comments.
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ABSTRACT The concept of the Solar Power Satellite energy system is to place giant satellites, covered with vast arrays of solar cells, in geosynchronous orbit 22,300 miles above the Earth’s equator. Each satellite will be illuminated by sunlight 24 hours a day for most of the year. Because of the 23″ tilt of the energy [...]
Written by John on October 16th, 2008 with 1 comment.
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