88304233 411 Wireless Charging of Mobile Phones Using Microwaves
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Transcript of 88304233 411 Wireless Charging of Mobile Phones Using Microwaves
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A PAPER PRESENTATION ONWIRELESS CHARGING OF MOBILEPHONES
USING MICROWAVES
Presented ByG.Divya (08J91A0411)
Internal Guide:G.Venu
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CONTENTS
• ABSTRACT• INTRODUCTION• THE MICROWAVE REGION• TRANSMITTER DESIGN• RECEIVER DESIGN• PROCESS OF RECTIFICATION• SENSOR CIRCUITRY• CONCLUSION• REFERENCES
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ABSTRACT
• The main objective of this current proposal is to make the recharging of the mobile phones independent of their manufacturer and battery make.
• In this paper a new proposal has been made so as to make the recharging of the mobile phones is done automatically as you talk in your mobile phone!
• The microwave signal is transmitted from the transmitter along with the message signal using special kind of antennas called slotted wave guide antenna at a frequency is 2.45 GHz.
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INTRODUCTION
• The speed of light is about 300,000,000 meters per second.
• The light with the longest wavelength (red) is absorbed by the green stuff (chlorophyll) in the leaves. So is the light with the shortest wavelength (blue).
• These electromagnetic waves are made up of to two parts. The first part is an electric field. The second part is a magnetic field. So that is why they are called electromagnetic waves. The two fields are at right angles to each other
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THE ELECTROMAGNETIC SPECTRUM
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THE MICROWAVE REGION
•Here we have selected the license free 2.45 GHz ISM band for our purpose
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TRANSMITTER DESIGN
•The MAGNETRON (A) is a self-contained microwave oscillator that operates differently from the linear-beam tubes, such as the TWT and the klystron. View (B) is a simplified drawing.
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Magnetron
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RECEIVER DESIGN
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The process of rectification• Microwave energy transmitted from space to earth apparently have the potential to provide clean electrical power on a very large scale.
• The aim of the study to make a low cost power rectifier for low&high power levels at a frequency of 2.45GHz.
• The schottky diode microwave rectifying circuit has the efficiency is greater than 90%.
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Scottky Diode
• A Schottky barrier diode is formed by connecting a metal with a semiconductor.
• The semiconductor material of metal generally is chosen from different metals such as molybdenum, chromium, platinum and tungsten.
• This diode does not has minority carriers, its speed is much faster, so its reverse recovery time(Trr) is very short and shorter than 10 ns.
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SENSOR CIRCUITRY
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Advantages
• If we are running out of battery, then what we need to do is just call a number from our phone will be recharged by packet energy within some time without the need to search for plugging in our phone.
• What we need to do is turn on our laptop or search for any other laptop or phone users near by and charge our phone by Bluetooth.
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CONCLUSION
• Thus this paper successfully demonstrates a novel method of using the power of the microwave to charge the mobile phones without the use of wired chargers.
• A novel use of the rectenna and a sensor in a mobile phone could provide a new dimension in the revelation of mobile phone.
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REFERENCES
• www.1000projects.com• www.fullinterview.com• www.chetanasprojects.com
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