Wireless charging of mobilephones using microwaves

1. BITS Pilani
Hyderabad Campus
WIRELESS CHARGING OF
MOBILEPHONES USING
MICROWAVES
Mayank Garg
2013H140040H
Embedded System
BITS-Pilani, Hyderabad Campus

2. BITS Pilani, Hyderabad Campus
 NEED OF W.C.
 LIGHT & MICROWAVES
 THE MICROWAVE REGION
 TRANSMITTER DESIGN
 RECEIVER DESIGN
 RECTENNA
 PROCESS OF RECTIFICATION
 SENSOR
 ADVANTAGES
 DISADVANTAGES
 CONCLUSION
Mayank Garg Slide 2
CONTENTS

3. BITS Pilani, Hyderabad Campus
 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.
NEED OF WIRELESS CHARGING
Mayank Garg Slide 3

4. BITS Pilani, Hyderabad Campus
 Wire+Less
How It Is Done……?
 Using Micro Waves
Mayank Garg Slide 4
What Is Wireless Charging…?

5. BITS Pilani, Hyderabad Campus
 Because These Can Penetrate
Haze
Rain and Snow
Clouds
Smoke
Frequency Selection…!
S Band Of Spectrum (ISM)
Mayank Garg Slide 5
Why Microwaves…???

6. BITS Pilani, Hyderabad Campus
Photons
Wavelength Of Light
EM waves
Mayank Garg Slide 6
LIGHT &Microwaves

7. BITS Pilani, Hyderabad CampusMayank Garg Slide 7
THE ELECTROMAGNETIC SPECTRUM

8. BITS Pilani, Hyderabad CampusMayank Garg Slide 8

9. BITS Pilani, Hyderabad Campus
 Here we have selected the license free 2.45 GHz ISM band for our
purpose
Mayank Garg Slide 9
THE MICROWAVE REGION

10. BITS Pilani, Hyderabad CampusMayank Garg Slide 10

11. BITS Pilani, Hyderabad CampusMayank Garg Slide 11
Transmitter And Receiver

12. BITS Pilani, Hyderabad CampusMayank Garg Slide 12
TRANSMITTER
The MAGNETRON is a self-contained microwave oscillator
that operates differently from the linear-beam tubes, such
as the TWT and the klystron.

13. BITS Pilani, Hyderabad CampusMayank Garg Slide 13
Magnetron

14. BITS Pilani, Hyderabad Campus
 Impedance Matching
 Transmission
Mayank Garg Slide 14
THE SLOTTED WAVEGUIDE ANTENNA

15. BITS Pilani, Hyderabad Campus
Rectenna:-
Mayank Garg Slide 15
Receiver

16. BITS Pilani, Hyderabad Campus
Schottky Barrier Diode
 Low Pass Filter
Mayank Garg Slide 16
RECTENNA

17. BITS Pilani, Hyderabad Campus
 Small Voltage Drop
 Higher Switching Speed
 Low Noise Index
Mayank Garg Slide 17
Why Schottky Diode….???

18. BITS Pilani, Hyderabad CampusMayank Garg Slide 18
SENSOR
 Detection of Message Signal
 Triggering The Rectenna
 GSM Frequency In INDIA (900MHz Or 1800MHz)

19. BITS Pilani, Hyderabad Campus
 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.
Mayank Garg Slide 19
Schottky Diode

20. BITS Pilani, Hyderabad Campus
 The need of different types of chargers by different
manufacturers is totally eliminated
 Lower risk of ELECTRICAL SHOCK or shorting.
 Convenience
 Wireless energy transfer can potentially recharge the
mobile phones without chords
Mayank Garg Slide 20
Advantages

21. BITS Pilani, Hyderabad Campus
 The transmitter and receiver also should be very powerful
devices as the distance increases.
 Slower Charging.
 Wireless transmission of the energy causes some drastic
effects to human body, because of its radiation.
 More costly.
 Practical possibilities are not yet applicable as there is no
much advancement in this field.
Mayank Garg Slide 21
Disadvantages

22. BITS Pilani, Hyderabad Campus
 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.
Mayank Garg Slide 22
Conclusion

23. BITS Pilani, Hyderabad Campus
Thanks
Mayank Garg Slide 23
Link to connect with author:
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https://www.linkedin.com/in/gargmayank
http://www.researchgate.net/profile/Mayank_Garg6/
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