this ppt explains how mobile phones can be charged using microwaves wirelessly

1. WIRELESS CHARGING OF
MOBLIE PHONES USING
MICROWAVES
PRESENTED BY
SARA FATIMA SHAGUFTA
ECE-B,160313735048
1ST YEAR
DECCAN COLLEGE OF ENGINEERING AND TECHNOLOGY

2. CONTENTS
INTRODUCTION
OBJECTIVE
PRINCIPLE OF OPERATION
TRANSMITTER
RECEIVER
IMPLEMENTAION
ADVANTAGES
DISADVANTAGES
FUTURE SCOPE

3. INTRODUCTION
 Mobile phones are now a basic part
of life.
 Recharging of mobile phones is a big
problem.
 Objective—to recharge any mobile
phone independent of manufacturer
made battery. We are going to add
just a rectenna & a filter to the
ordinary mobiles during
manufacturing time…
 Achieved by recharging battery
while talking using microwaves .
 Thus the more you talk, the more is
your mobile phone charged!!!!!!!

4. WHAT’S HAPPENING??
 Microwave signal is transmitted from
transmitter along with message signal
using slotted waveguide antenna at
frequency 2.45 GHz
 Charging made universal

5. THE MICROWAVE REGION

6. FREQUENCY SELECTION
 Select license free 2.45 GHz Industrial,
Scientific and Medical (ISM) radio
bands
 ISM bands are reserved internationally
for non-commercial use of RF
electromagnetic fields for industrial,
scientific and medical purpose

7. WHY WIRELESS CHARGING
USING MICROWAVES ?????
Microwaves are good
for transmitting
information from one
place to another (
because it penetrate
haze , light rain , snow ,
clouds etc…).
has shorter wavelength
than remote sensing.

8. PRINCIPAL OF OPERATION
 BLOCK DIAGRAM

9. TRANSMITTER SECTION
 IT CONSIST OF TWO
PARTS
 MAGNETOR ,SLOTTED
WAVEGUIDE
ANTENNA
 Magnetron is a vacuum
tube oscillator that
generates high-power
electromagnetic signals
in the microwave
frequency range.
 Magnetron is used to
produce high-power
output required in radar
and communication
equipment

10. SLOTTED WAVEGUIDE
ANTENNA
 It is an Omni-
directional antenna
 Slotted antenna arrays
used with waveguides
are popular antenna in
navigation, radar and
other high-frequency
systems
 Has high efficiency and
gain of 13dB

11. RECEIVERS SECTION
 Basic additions to mobile phone
 Sensor,rectenna
 Simple yet powerful F to V
converter is LM2907 is used as
sensor.
 On the reception of the
microwave signal ,the sensor
circuitry directs rectenna
circuit to ON
 Rectenna circuit converts
microwave energy to dc output
 Mobile phone begins to charge
using the microwave power as
long as the user talks over cell
phone.
 What is Rectenna ?
 Rectenna = Rectifier
+ Antenna.

12. ADVANTAGES
 Charging mobiles wirelessly
 Saving time for charging
 Wastage of power is less
 The phone can be charged
at any place and any time.
 One can carry their mobile
phones any place even to a
remote village.
 Get charged as we make
call during long journey

13. IMPLEMENTATIONS
 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
compatable , which means
we can use any chargers
we like

14. DISADVANTAGES
 Radiation problems may
occur
 Network traffic may
cause problems in
charging
 Charging depends on
network coverage
 Rate of charging may be
of minute range

15. 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.