automaticaly charges mobile phone as talking....

2.  INTRODUCTION
 PRINCIPLE OF OPERATION
 TRANSMITTER
 RECEIVER
 IMPLEMENTAION
 ADVANTAGES
 DISADVANTAGES
 CONCLUSION

3.  Always the recharging mobile phone has a
problem for us.
This problem will be solved after our
proposal…..!!!
The recharging of mobile phones is done
automatically as you talk in your mobile.
The microwave signal is transmitted from the
transmitter along with the message signal.

4.  The microwave signal is transmitted along with massage
signal using slotted wave guide antenna.
 The sensor search for the mobile signal .In addition it has
a RECTENNA.
 RECTENNA receives the transmitted power and convert
the microwave power to DC.

6.  Microwaves are good for transmitting information from one
place to another.
 microwave energy can penetrate haze, light rain and snow,
clouds, and smoke.
 Shorter microwaves are used in remote sensing.
 These microwaves are used for radar like the Doppler radar
used in weather forecasts .

7.  Frequency range:300MHz-300GHz
 Remote sensing
 Communication industry
 2.45 GHZ, S-Band

8.  The MAGNETRON is a self-contained microwave
oscillator.
 Used to produce high power output in radar and
communication equipment.
 Efficiency of this high power oscillator lies between
50% and 80%.
Electron beam
Energy
Microwave
Energy Cross Field Device

9.  It is used as ideal power transmitter
(because of its high aperture efficiency
>95%) .
 It has high power handling capacity .
 It has 64 slots of power uniformly
through free space to the rectenna.

10. Microwave
Energy
DC Energy
 The basic addition to the mobile
phone is FILTER and RECTENNA.
 RECTENNA is used to convert
microwave energy to DC electricity.

11.  It’s nothing but the combination of Rectifier and
Antenna.
 Antenna receives microwave signal and just feed the
signal to Rectifier.
 Rectifier converts the signal to pulsating DC.

12.  The operating frequency of the mobile phone is 900MHz
or 1800MHz for communication.
 LM2907-a simple n F to V converter used as it operates
between this specified range .
 To trigger the rectenna circuit to ON and the mobile
begins to charge using the microwave power
automatically.
 This is required, as the phone has to be charged as long
as the user is talking.

13.  Recently NOKIA has launched this wireless charging
technology in its new recent mobile model “ NOKIA
LUMIA 1020.

14.  Use of separate chargers are eliminated.
 Electricity is saved.
 The phone can be charged anywhere anytime.
 No risk of electric shock.
 Wireless microwave transmitter can serve to all the
service providers in that area.

15.  Wireless transmission of the energy causes some drastic effects
to human body, because of its radiation.
 Process is of high cost.
 The transmitter and receiver also should be powerful as the
distance increase.

16.  In future RECTENNA is used to produce large-scale
power from microwaves beam .
 This technology is also applicable for electronic
gadgets which work on batteries and thus saves
electricity.
 Currently researches are going on, to implement
this technology for laptops.

17.  Thus this paper successfully demonstrates a method
of using the power of microwave to charge mobile
phones without use of wired chargers.
 This novel idea minimize the tension of charging your
phone regularly.