This document proposes a design for wirelessly charging mobile phones using microwaves. It includes sections on the microwave region, a transmitter using a magnetron to emit microwaves, a receiver with a rectenna to convert microwaves to DC power for charging. The design would allow phones to charge while in use without needing wires. Potential advantages include off-grid charging and electricity savings, but health effects of radiation and network dependence require further study.

1. BY,
RAMANA
11RK1A0445
ECE
FINAL YEAR

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

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

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

6. MAGNETRON
 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.  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. 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.  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.  Recently NOKIA has launched this wireless charging
technology in its new recent mobile model “NOKIA
LUMIA1020”.
 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.  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.  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.  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.  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.  www.slideshare.com
 www.wikipedia.org
 www.seminarsonly.com
 Theodore .S.Rappaport, “Wireless communications
principles and practice”.