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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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