This document proposes a method for wirelessly charging mobile phones using microwaves. It discusses using a magnetron transmitter at 2.45 GHz to transmit microwave signals along with message signals. A receiver design called a rectenna would receive this signal and convert the microwave power to direct current using rectifying circuits. This process allows mobile phones to charge automatically as users talk without needing physical charging cords or being dependent on manufacturers. It aims to provide a convenient and universal wireless charging solution for mobile phones.

1. WIRELESS CHARGING OF
MOBILEPHONES

2. CONTENTS
•
ABSTRACT
•
INTRODUCTION
•
THE MICROWAVE REGION
•
TRANSMITTER DESIGN
•
RECEIVER DESIGN
•
PROCESS OF RECTIFICATION
•
SENSOR CIRCUITRY
•
CONCLUSION
•
REFERENCES

3. ABSTRACT
 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

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! This is done by use of
microwaves. 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. • THE MICROWAVE REGION
• Here we have selected the license free 2.45 GHz ISM band for
our purpose

6. TRANSMITTER DESIGN
• Magnetron is a high power microwave oscillator and it is used in
microwave oven and radar transmitter.
• Magnetron is capable to deliver more power than reflex
klystron or gunn diode
• This magnet is setup to affect the path of travel of electrons that
are in transit from cathode to the anode plate.

7. Magnetron

8. RECEIVER DESIGN

9. RECTENNA
A rectifying antenna
called a rectenna receives the
transmitted power and converts
the microwave power to direct
current (DC) power.
This demonstration rectenna
consists of 6 rows of dipoles
antennas where 8 dipoles
belong to each row. Each row is
connected to a rectifying circuit
which consists of low pass
filters and a rectifier.

10. The process of rectification
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%.


11. ADVANTAGES
 Use of separate chargers is eliminated.
 Electricity is saved.
 The phone can be charged anywhere anytime.
 Wireless energy transfer can potentially recharge
the mobile phones without chords.
 Only one microwave transmitter can serve to all
the service providers in that area.
 The need of different types of chargers by
different manufacturers is totally eliminated.

12. APPLICATIONS

13. 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.

14. REFERENCES
• www.1000projects.com
• www.fullinterview.com
• www.chetanasprojects.com
• Research paper on ‘Wireless Power
Transmission’- by James O. Mc Spadden Texas
A&M University

15. THAN Q…………