This document discusses wireless charging technology for mobile phones. It describes three methods of wireless charging - resonance charging, inductive charging, and radio charging. Inductive charging works by using electromagnetic induction to transfer energy between coils in the charging base and device. The document proposes using this principle to automatically charge phones as users talk, eliminating the need for separate chargers and wires. It presents the block diagram and advantages of the wireless charging system.

2. OVERVIEW:
ABSTRACT
INTRODUCTION
METHODS OF CHARGING
WORKING OF WIRELES CHARGING
BLOCK DIAGRAM
NEED OF WIRELESS CHARGING
APPLICATIONS
ADVANTAGES
CONCLUSION

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.

4. INTRODUCTION
 Smartphone are changing the way we live. With each new model, we
are used to getting more processor speed, new features, and entire new
ways of using them. Despite increased capabilities, battery life simply
hasn’t kept up.
 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. There are three types of wireless charging :-
• Resonance Charging
• Inductive Charging
• Radio Charging

6. Resonance Charging :
Two copper coils are used one attached to transmitter & another to
receiver.
Both coils are tuned to same electromagnetic frequency.
These coils when placed close to one It uses phenomenon of
“RESONANCE”, that causes an object to get energy when certain
frequency is applied.

7. Inductive Charging :
This method works on the principle of
“ELECTROMAGNETIC INDUCTION” where the charger device will
create an E.M field with alternating polarity using a coil of insulated
copper wire & a similar coil will be placed inside the mobile device
which will convert E.M field back to electric current there by charging
the battery.

8. Radio charging:
•This method is on the basis that Radio Waves are widely in use to
transmit and receive cellular telephone, television, radio and Wi-Fi.
• A Radio wave once transmitted, propagates in all directions until it
reaches an antenna tuned to proper frequency to receive it.
•A transmitter plugged in to a socket, generates radio waves, when the
receiver attached to the device is set to the same frequency as the
transmitter, it will charge the device’s battery .

9.  Wireless chargers emit an alternating current via a transmitter
coil, which then induces a voltage in the receiver coil found in
the device.
 Qi wireless charging pads are capable of charging
Smartphone, tablets, Bluetooth headsets, cameras and portable
power packs.

10.  It works on the principle of Electromagnetic Induction.

11.  Induction chargers typically use an induction coil to create an alternating
electromagnetic field from within a charging base station, and a second
induction coil in the portable device takes power from the electromagnetic
field and converts it back into electrical current to charge the battery.

12. Block Diagram of Wireless charging System

18.  To make the recharging of the mobile phones independent of
their manufacturer and battery make.
 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.

19.  Use of separate chargers is eliminated.
 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.

20. 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.