Cell Phones are a piece of our life. It is the quickest and the most straightforward medium of correspondence. Battery life of cell telephone is dependably been an issue for makers. Individuals are griping about their versa tile’s battery life, that they don't have long battery life furthermore they need to charge their telephone a few times. In this paper another thought is indicated to charge your cell telephone anyplace you need without associating its charger. This is carried out utilizing microwaves. Microwaves are the radio waves which give correspondence between two cell telephones. The microwave is sent with the message by the transmitter utilizing radio wire at the recurrence of 2.45 GHz. Here we are utilizing Microwaves as the wellspring of vitality to charge the telephone. We need to include a sensor, a rectenna circuit and a filer in our cell telephone to do the employment. By including these things we can charge our telephone utilizing microwave when we talk. So as we talk more we can charge more!!

1. Wireless Charging of Mobile Phones
Using Microwave

2. OUTLINE
1 Introduction
2 Microwaves
3 Components of wireless system
4 System Design
5 Advantages
6 Disadvantages
7 Applications
8 Future scope
9 Conclusion

3. INTRODUCTION
• We deal with the automatic recharging of mobile phones by use
of microwaves.
• The microwaves signal is transmitted from the transmitter along
with the message signal using slotted wave guide antenna at a
frequency is 2.45GHZ.
• There are addition of a sensor ,a “rectenna” ,& a filter to the
mobile handset.
• The need for separate chargers for mobile phones is eliminated
& makes charging universal.

4. MICROWAVES
 GDSFCFFDF


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
V Band 46 to 56 GHz
W Band 56 to 100 GHz

5. MAIN COMPONENTS
 There are 4 main components are below
1. Microwave generator
2. Slotted waveguide antenna
3. Sensor circuit
4. Rectenna

6. MICROWAVE GENERATOR
 This is used to generates the microwaves of preferred
frequency .
 It is generates microwaves by the interaction of steam of
elections and magnetic field.

7. TRANSMMITING ANTENNA
• This is used to transfer the signal from free space to the
device.
• There are many slotted wave guide antenna available.
• Like parabolic dish antenna, micro strip antennas are the
popular type of transmitting antenna.
• There is parabolic dish antenna used.

8. SENSOR CIRCUIT
• The sensor circuit is a simple circuit, which detects if the
mobile phone receives any massage signal.
• This is required , as the phone has to be charged as long as
the user is talking.
• There is F to V convert would act as switch to trigger the
rectenna circuit to on.

9. RECTENNA

10. SYSTEM DESIGN
The system designing of wireless charging of mobile phones
using microwaves mainly consist of four parts are
1. Transmitter design
2. Receiver design
3. process of rectification
4. Inductive charging

11. TRANSMITTER DESIGN

12. RECEIVER DESIGN

13. PROCESS OF RECTIFICATION

14. ADVANTAGES
• Use of separate chargers is eliminated .
• Electricity is saved .
• The phone can be charged anywhere anytime.
• Charge the phone by bluetooth so low risk of electrical
shocks or shorting.
• Charging of mobile phones is done wirelessly.

15. DISADVANTAGES
• Network traffic may cause problems in charging.
• Wireless transmission of the energy cause some drastic
effect to human body, because of its radiation.
• Charging depends on network coverage.

16. APPLICATIONS
Wireless charging works well with
• Mobile phones
• digital camera
• media players
• blutooth headsets.

17. FUTURE SCOPE
• In future RECTENNA is used to produce large-scale
power from microwaves beam.
• currently researches are going on, to implement this
technology for laptops.

18. CONCLUSION

19. THANK YOU