Wireless charging of mobile phones using microwaves

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Mobile Phone Charging Using Microwaves

BY m.NAVEEN

KUMAR M.Tech_vlsi 13241d5710 griet

Contents

• Introduction• Transmitter design• Receiver design• Advantages • Disadvantages • Conclusion• References

Introduction

The electromagnetic spectrum: What is EM spectrum? How EM spectrum is produced? Example…

Microwave region: What is Microwave region? Why we go for Microwave communication? Selection of frequency…

The electromagnetic spectrum

What is EM spectrum?

The electromagnetic spectrum

How EM spectrum is produced?

The electromagnetic spectrum

Example

What is Microwave region

Wavelength : 1 mm-30 cm

Why we go for Microwave communication?

Microwaves are good for transmitting information from one place to another ( because it penetrate haze , light rain , snow , clouds etc…).

Selection of frequency

The frequency selection is another important aspect in transmission. Here we have selected the license free 2.45 GHz(Industrial, Scientific and Medical) ISM band for this purpose.

Block diagram

Transmitting station with the microwave

transmitter

sensor

Rectenna

RF cable

circulator

waveguide

Slotted waveguideAntenna

mobile signal

Magnetron

Slotted waveguide antenna

sensor circuit

Zener regulated frequency to voltage converter

VOUT = fIN × VCC × Rx × Cx

Rectenna block diagram

rectenna

Rectenna array

Advantages

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.

Mobile get charged as we make call even during long journey.

Disadvantages

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

Practical possibilities are not yet applicable as there is no much advancement in this field.

Process is of high cost

Conclusion

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

References

Theodore.S.Rappaport , “Wireless Communications Principles and Practice”.

Tae-Whan yoo and Kai Chang, "Theoretical and Experimental Development of 10 and 35GHz rectennas" IEEE Transaction on microwave Theory and Techniques, vol. 40.NO.6.June.1992.

'Microwave and RF circuits: analysis,synthesis, and design', Artech House, Norwood, MA,1993.

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