18-07-2014, 03:20 PM
Wireless Charging of Mobile Phone using Microwaves!
Wireless Charging of Mobile.pdf (Size: 178.84 KB / Downloads: 116)
ABSTRACT
Mobile Phones are part of our life. It is the fastest and the easiest medium of
communication. Battery life of mobile phone is always been a problem for manufacturers.
People are complaining about their mobile’s battery life, that they don’t have long battery life
and they have to charge their phone several times. In this paper a new idea is shown to charge
your mobile phone anywhere you want without connecting its charger. This is done using
microwaves. Microwaves are the radio waves which provide communication between two
mobile phones. The microwave is sent with the message by the transmitter using antenna at the
frequency of 2.45GHz. Here we are using Microwaves as the source of energy to charge the
phone. We have to add a sensor, a rectenna circuit and a filer in our mobile phone to do the job.
By adding these things we can charge our phone using microwave when we talk. So as we talk
more we can charge more!!
INTRODUCTION
Electromagnetic Spectrum
As we know that when light shone through
the prism it is divided in all the colors which
we called rainbow, and technically it is
called visible spectrum. So light is made of
photons. Photons are bundle of energy.
Light is traveling at the speed of 3,00,000
km/hr So when light hit an object coming on
its way it actually rebound from its surface.
And it comes in to our eyes and we can see
the object. But color of the object is seen by
us is depend how much amount of energy is
rebound as photons from the object. But
some theory can’t be explained by taking the
light as the bunch of photos. So some
physicians assume that it is some kind of
wave. They define an electromagnetic
sanctum of different wave lengths which is
divided in two parts. One is electric field
and the other is magnetic fiel
Microwave Region
Microwaves are the Radio wave which has
the wave length range of 1 cm to 1 meter.
And the frequency is 300MHz to
300GHz.Each and every object on the earth
absorb different amount of microwave
energy. Microwave oven converts this
microwave energy in to the frequency which
the food absorbs and gets energy from it and
get worm. But the bowl containing the food
do not get worm because its capacity of
absorbing microwave frequency is different!
Microwaves are good at carrying
information from one place to other. As the
microwave penetrates the solid material and
also it do not have and effect of weather and
rain etc. So it is useful to carry information
WIRELESS POWER TRASMISSION
Nikolas Tesla is the father of wireless
electricity transmission. Who first
transmitted electricity without wire.
Magnetic induction is the main principle
behind the wireless power transmission. As
we put one coil carrying current through it,
it creates a magnetic field near to it. And if
we put other coil over there than it is induce
by the first coil and it carry current from it!
This is the simple principle behind it
Receiver design
We have to add a sensor and a Recteen at
the receiver side. As we have seen that
recteena actually convert the Microwave in
to the DC power. Rectenna are very
powerful to convert the Microwave in to the
electricity. Actually the size of rectenna can
be reduce using the Nano technology.
Another important part is the Sensor. As we
know we are going to charge the phone
while a person is talking. So here sensor is
used to detect wither the phone is using
microwaves or not.
The Process of Rectification
Microwave can travel through the media but
it also lose some energy. So our key
objective is to rectify the circuit our
objective is to rectify the waves at the low
cost. And also we have to make the
detection more sensitive. As we know that
bridge rectification is more efficient than the
single diode. And we use the shotky diode to
get the batter impedance.
CONCLUSION
So here it is shown that a mobile phone can
be charge using the microwave which we
get everywhere where a mobile phone can
perform its task