2.  WIRELESS CHARGER USING MICROWAVES….

3. CONTENTS : 1.INTRODUCTION 2.TRANSMISSION DESIGN 3.RECEIVER DESIGN 4.PROCESS OF DESIGN 5.SENSOR CIRCUITRY 6.CONCLUSION 7.REFERENCES

4. INTRODUCTION:  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.

5. ELECTROMAGNETIC SPECTRUM :  The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object.  The electromagnetic spectrum extends from low frequencies used for modern radio communication to gamma radiation at the short-wavelength end, thereby covering wavelengths from thousands of kilometers down to a fraction of the size of an atom.  It is for this reason that the electromagnetic spectrum is highly studied for spectroscopic purposes to characterize matter. The limit for long wavelength is the size of the universe itself, while it is thought that the short wavelength limit is in the vicinity of the Planck length, although in principle the spectrum is infinite and continuous.

6. ELECTROMAGNETIC SPECTRUM:

7. The Microwave region:  Here we have selected the license free 2.45 GHz ISM band for our purpose.

8.  Designation  Frequency range L Band1 to 2 GHz S Band2 to 4 GHz C Band4 to 8 GHz X Band8 to 12 GHz Ku Band12 to 18 GHz K Band18 to 26 GHz Ka Band26 to 40 GHz Q Band30 to 50 GHz U Band40 to 60 GHz Here we are going to use the S band of the Microwave Spectrum :

9. 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.

10. MAGNETRON:

11. RECEIVER DESIGN

12. RECTIFICATION PROCESS:  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%.

13. ADVANTGes:  It would be convenient not having to worry about charging or changing batteries and still having a working mobile.  It will charge up the batteries which can save time and money in a long run for general public.

14. 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.

15. REFERENCES: 1.www.1000projects.com 2.www.fullinterview.com 3.www.chetanasprojects.com 4.“Telecommunication Switching System on Networks”. T. Vishvsnathan

16. Thankyou…!