Wireless charging of mobile phones by using microwaves

Submitted to: Submitted by: Er.Deepesh Namdev Name: Aveen Meena HOD cum Asso. Prof. Roll no.:10EGKEC011 (E&C, EE Department) DEPARTMENT OF ELECTRONICS & COMMUNICATION ENGG.

Gurukul Institute of Engineering & Technology, Kota

A Presentation Seminar

On Wireless Charging Of Mobile Phones Using Microwaves

Contents INTRODUCTIONPRINCIPLE OF OPERATIONTRANSMITTERRECEIVER IMPLEMENTAIONADVANTAGESDISADVANTAGESCONCLUSION

Introduction

The mobile can be charged at any time, anywhere automatically

as you talk in your mobile phone!

This technology would eliminate the need for physically

plugging in an 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

Wireless Charging Of Mobile Phones Using Microwaves

Principle of Operation & Block Diagram

Transmitting station with the microwave

transmitter

sensor

Rectenna

RF cable

circulator

waveguide

Slotted waveguideAntenna

mobile signal

The microwave signal is transmitted along with message 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 converts the microwave power to DC power.

TRANSMITTER The MAGNETRON is a self-contained microwave

oscillator.

Efficiency of this high power oscillator lies between 50% and 80%.

Electron beam Energy

Microwave Energy

Cross Field Device

Slotted waveguide antenna

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.

Reciever Rectenna:- Microwave

EnergyDC Energy

The microwave signal is transmitted along with message signal using slotted wave guide antenna.

The sensor search for the mobile signal , in addition it has a “RECTENNA”.

It comprises of a dipoles and Schottky barrier

diodes Usually its elements are arranged in the

mesh pattern.

Rectenna

Implementation Recently NOKIA has launched this wireless charging technology in its new recent

mobile model “ NOKIA LUMIA 1020”.

Energy efficient chargers of all size and shape to match our phone.

They are all quiet compactable , which means we can use any chargers as we like.

Advantages

The need of different types of chargers by different manufacturers is totally eliminatedLower risk of ELECTRICAL SHOCK or shorting.Convenience.Wireless energy transfers can potentially recharge the mobile phones without chords.

Disadvantages

Wireless transmission of the energy causes some drastic effects to human body, because of its radiation

Process is of high cost.

FUTURE SCOPE

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.

Conclusion

Thus this paper successfully demonstrates a method of using the power of microwave to charge mobile phones without use of wired chargers.

Any Queries..??