Mine

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Mine

  1. 1. TECHNICAL SEMINAR ON WIRELESS CHRGING OF MOBILE PHONES USING MICROWAVES K.PRAVEEN KUMAR 08771A0443 ELECTRONICS&COMMUNICATION ENGINEERING
  2. 2. CONTENTS • ABSTRACT • INTRODUCTION • TRANSMITTER DESIGN • RECEIVER DESIGN • PROCESS OF RECTIFICATION • SENSOR CIRCUITRY • CONCLUSION • REFERENCES
  3. 3. ABSTRACT  With mobile phones becoming a basic part of life,the recharging of mobile phone batteries always been a problem.  In this paper a new propasal has been made so as to make the recharging of mobile phones is done automatically as you talk in your mobile phone!This is done by using microwaves.
  4. 4. INTRODUCTION  Electro Magnetic spectrum  Electromagnetic waves 1. Electric Field 2. Magnetic Field
  5. 5. MICROWAVE REGION Microwave wavelengths range from approximately 1mm to 30 cm Microwaves are good for transmission. Micro waves are of two types 1.Longer microwaves 2.Shorter microwaves
  6. 6. Designation Frequency range L Band 1 to 2 GHz S Band 2 to 4 GHz C Band 4 to 8 GHz X Band 8 to 12 GHz Ku Band 12 to 18 GHz K Band 18 to 26 GHz Ka Band 26 to 40 GHz Q Band 30 to 50 GHz U Band 40 to 60 GHz
  7. 7. TRANSMITTER DESIGN Magnetron simplified drawing of the magnetron
  8. 8. o MAGNETRON o PHYSICAL APPERANCE OF MAGNETRON o PLATE STRUCTURE
  9. 9. FRONT VIEW OF THE MAGNETRON
  10. 10.  The cathode and filament are at the center of the tube and are supported by the filament leads.  Since the cathode must operate at high power, it must be fairly large and must also be able to withstand high operating temperatures.  Interaction Space
  11. 11. RECEIVER DESIGN Basic addition to the mobile phone is going to be 1.Rectenna 2.Sensor Circuitry With the advent of Nanotechnology and Mems the size of the devices can be reduced.
  12. 12. Sensor Circuitry • A simple F to V converter would serve as a Sensor Circuitry • A simple yet powerful F to V converter is LM2907. Using LM2907 would greatly serve our purpose. It acts as a switch for triggering the rectenna circuitry. • Thus on the reception of the signal the sensor circuitry directs the rectenna circuit to on.
  13. 13. BLOCK DIAGRAM OF LM2907 F TO V CONVERTER
  14. 14. Schotttky Barrier Diode • A Schottky barrier diode is different from a common P/N silicon diode. • Sputtering technique connects the metal and semi- conductor • A Schottky barrier diode is a majority carrier device, its speed is much faster than a common P/N diode.
  15. 15. 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. Thus this method provides great advantage to the mobile phone users to carry their phones anywhere even if the place is devoid of facilities for charging. • A novel use of the rectenna and a sensor in a mobile phone could provide a new dimension in the revelation of mobile phone.
  16. 16. THANK YOU…
  17. 17. ANY QUERIES ?

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