WIRELESS CHARGING OF MOBILEPHONES

CONTENTS•

ABSTRACT•

INTRODUCTION•

THE MICROWAVE REGION•

TRANSMITTER DESIGN•

RECEIVER DESIGN•

PROCESS OF RECTIFICATION•

SENSOR CIRCUITRY•

CONCLUSION•

REFERENCES

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

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.

• THE MICROWAVE REGION• Here we have selected the license free 2.45 GHz ISM band for

our purpose

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.

Magnetron

RECEIVER DESIGN

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.

The process of rectificationMicrowave 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%.

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.

APPLICATIONS

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.

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

THAN Q…………