This document summarizes a student project on wirelessly charging mobile phones using microwaves. It includes sections on the introduction, microwave region, transmitter and receiver design, implementation, advantages, and disadvantages. The goal is to allow phones to charge independently of manufacturer or battery type by transmitting power via microwaves during a call. A rectenna converts received microwaves to DC power, while a sensor triggers charging when a call is active. Wireless charging via microwaves could allow calling from remote areas without wired charging and save electricity, though it may pose health risks from radiation and has high implementation costs.

1. WIRELESS CHARGING
OF MOBILE PHONES
USING MICROWAVE
BY
PRIYANKA V
1ST SEM ,E & C , Mtech
PONDICHERRY UNIVERSITY

2.  INTRODUCTION
 MICROWAVE REGION
 BLOCK DIAGRAM
 TRANSMITTER DESIGN
 RECEIVER DESIGN
 IMPLEMENTATION
 ADVANTAGES
 DISADVANTAGES
 FUTURE SCOPE
 CONCLUSION
WIRELESS CHARGING

3. • Mobile phones becoming basic part of life
• Recharging of mobile phones is a big
problem
• Objective—to recharge any mobile phone
independent of manufacturer and battery
make
• Achieved by recharging battery while talking
using microwaves
INTRODUCTION

4. MICROWAVE REGION
• Microwaves are good for transmitting
information from one place to another
• It is because microwave energy can penetrate
rain and snow, clouds, and smoke

5. BLOCK DIAGRAM

6. TRANSMITTER DESIGN
• It is a self-contained microwave oscillator that
operates different from linear oscillator.
• Cross field and magnetic field are used to
produce high-power output

7. SLOTTED 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

8. RECEIVER DESIGN
• The basic addition to the mobile phone is going to be
the rectenna and sensor
• Rectenna = Rectifier + Antenna.
• A rectifying antenna called a rectenna receives the
transmitted power and converts the microwave
power to direct current (DC) power.

9. SENSOR
• LM2907-a simple F to V converter used as it
operates specified range .
• To trigger the rectenna circuit to ON and the
mobile begins to charge using the microwave
power automatically.
• This is required, as the phone has to be charged
as long as the user is talking.

10. IMPLEMENTATION
• NOKIA,SAMSUNG,APPLE has launched this
wireless charging technology in its new recent
mobile model .
• Energy efficient charges of all size and shape to
match our phone.
• There are all quiet compactable, which means we
can use any charges are like.

11. ADVANTAGES
• One can carry their mobile phones any place to a
remote villages.
• The use of wired charges are eliminated.
• Electricity can be saved.
• The more you talk more you get charged.

12. DISADVANTAGES
• Wireless transmission of the energy causes
some effects to human body, because of its
radiation.
• Network traffic may cause problems in
charging.
• Charging depends on network coverage.
• Process is high cost

13. FUTURE SCOPE
• In future RECTENNA is used to produce large-scale power
from microwaves beam.
• This technology is also applicable for electronic gadgets
which works on batteries and thus save electricity.
• Currently researches are going on, to implement this
technology for laptops.

14. CONCLUSION
• A novel use of RECTENNA and a SANSOR in
mobile phone could provide a new
dimension in the revelation of mobile
phones.
• Thus a great advantage is to carry their
mobile phones to any place is devoid of
facilities for charging.

15. REFERENCE
• www.slideshare.com
• www.wikipedia.org
• www.seminarsonly.com
• Theodore .S.Rappaport, “Wireless
communications principles and practice”.