International Journal of Engineering Trends and Technology (IJETT) - Volume4Issue5- May 2013
Power Transmission through Wireless Medium
Tirumalasetty Krishna Chaitanya#, Rayala Ravi Kumar *
#
Final Year B.Tech, Dept. of ECE, KL University, Vaddeswaram, AP, India
*
Associate Professor B.Tech, Dept. of ECE, KL University,
Vaddeswaram, AP, India
Address
Abstract— The basic concept discussed here is use of the
wireless media to replace the use of ire wired media to
transmit the power. We know that there is also loss in the
transmission of power using wires .The world is advancing
so the usage of wireless power came into existence.
Experiments are going as the usage of power can be done
through all the home appliances so the usage of wired
technologies is reduced. For example, there is a new
inventory of charging the things through wireless such as
the gadgets charging through induction etc., thus using of
wire is barely applicable in this concept. We know that the
efficiency is reduced in the power transmission due to the
resistances of wire is up to 28% and also the efficiency
through wires serve up to 71% so the remaining power is
wasted., the amount saved is the amount used. necessity is
the mother of invention so the methods of witricity came in
to existence. We also use about 40,000 million batteries a
year for the disposable batteries. This paper deals with the
types of the power transmission and the methods of
transmission through wireless which tells us an alternative
way for power transmission.
Keywords-Power, Induction, Transmission, Witricity, Wireless,
Transfer
I. INTRODUCTION
The concept of wireless transmission came from a scientist
“father of wireless” Nicola tesla who made a invention of
wireless energy transfer in the year1891 using an electro
magnetic induction and his demonstration using the two
coupling coils where the transmission takes place completely.
His contribution paved the way for the introduction concept
for the wireless power. He also demonstrated the usage of
wireless power in the application for glowing the bulbs. He is
the person who transmitted the power over 45 kms range.
Many scientists provided their works on the concept of
witricity and also many scientists extended their research in
the 20th century, Coming to the year 2000 there is a professor
named Shu Yuen (Ron) Hui who invented planar wireless
charging using the vertical flux concept thus the invention of
many portable devices takes place for the wireless power
usage. In the year 2007 witricity research group of MIT
headed by professor Marin Soljacic lighted a bulb of 60 watts
with less efficiency and extended their research on witricity.
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II. METHODS OF TRANSMISSION
A. Laser Beaming.
Laser beaming is the process of transferring the power
in the form of laser such that the energy is received at the
receiver which converts it into electrical energy. The
major disadvantage is that the laser beaming is hazardous
to health and also it requires direct line of sight, there is a
loss of energy in the absorption process.
B. Microwave transfer.
This process of sending the microwaves from the
transmitter and is converted into the electrical energy is used
such as the antenna type rectenna is used. Rectenna is the
concept of the combination of both rectifying circuit and the
antenna. The general usage of antenna preferred is the
parabolic antenna and, for the moving purposes we use phased
array antenna. Most of the MPT(MICRO WAVE POWER
TRANSFER) use the range of 2.45ghz or 5.8ghz band which
is allocated by ITU-R radio regulations. The major
disadvantage is that it needs a more diameter antenna to
receive it which is not practically approachable. It is having
efficiency over 90% so it is very efficient in its approach but
the antenna construction is difficult.
C. Transfer Coupling.
This method involves magnetic fields which are applicable
for only little distances that is the major disadvantage in this
concept. Research is going on to improve the distance so that
there will be more efficient transfer through it.
D. Solar power transfer.
We can consider solar power as the concept of wireless
energy because we receive large amount of energy from the
sun through solar panels which by transducer it is changed so
that electrical energy is utilized efficiently. Research is
undergoing on the improvement of the efficiency of the power
by using the solar panels. Many countries are using solar
power nowadays. By using the solar power concept we can
utilize the energy up to 100%efficiency, But the major
concern is the cost factor. The man advantage is that it can
produce clean electric power throughout the globe.
E. Evenescent wave coupling.
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International Journal of Engineering Trends and Technology (IJETT) - Volume4Issue5- May 2013
This method is also called as resonant wave coupling in this
method using resonance concept and the usage of wave guide
we demonstrate the production of dc current and which is
applicable for 4 meters of demonstration.
SHARP technologies can fly about months together and can
fly at a height of 13kms which is unmanned.
F. Electrical conduction method.
This method involves the usage of wires in which when the
conduction is done through wires there is a breakdown voltage
in which the conduction is done by the surrounding air, thus
the conduction takes place through the air as medium concept.
III. FIELDS OF TRANSMISSION
Efficiency concept is explained by the above figure.
According to the usage of the technology of the wireless we
divide the type transmission through far field and near field.
An Electric atmosphere in which every home appliance is
charged.
A. Near field transmission.
In this transmission process the gadgets which are used in the
day to day life comes into concept for the near field concept.
Example:-charging of mobile phones etc
B. Far field transmission.
In this transmisson concept the wireless transmission of
power can be given to any home appliances
Example:-power given in running the television and other
home appliances.
WIRELESS SYSTEM
V. APPLICATIONS

It is used to power up the whole electrical
appliances.
CELL CHARGING DEVICE
IV. EFFICIENCY CONCEPT
We can find an efficiency of 80% of power transmission
for a transceiver system, but it is only applicable for a distance
of 50 cm which tells us the distance must be improved to get
the maximum efficiency. By using a medium source such as a
extender we can improve the distance between the transmitter
and the receiver. For example flight which is released by
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International Journal of Engineering Trends and Technology (IJETT) - Volume4Issue5- May 2013

It can be used in powering up the transport system
which disables the usage of the fossil fuels which
reduces the carbon content in the air.
energy system is possible through the wireless power systems.
The usage of energy through wires is also disadvantage in the
efficiency level context, So the wireless system is the new
technology in which more of the efficiency must be extracted
from it with less cost for the installation process.
ACKNOWLEDGMENT
This work has been done under the frame of Practice school
as a part of college curriculum. The authors acknowledge the
support of technical guide Mr. R Ravi Kumar and Practice
school Manager Mr. B Suresh.
REFERENCES
[1]
[2]
[3]
[4]

This microwave power transmission (MPT) can be
used in the space projects for the transportation of
flights.
VI. ADVANTAGES





The main advantage is it is omnidirectional means
the electrical energy generated can be done in all the
desired directions.
It could eliminate the use of all the usage of batteries.
More reliable.
Avoid using the cord technology so installation cost
is reduced to some extent.
High transmission integrity and very low loss in its
transmission.
VII.


DISADVANTAGES
High cost is required.
The coupling techniques such as transformer
coupling and the resonance coupling are not that
much efficient.
CONCLUSION
[5]
[6]
C Nikola Tesla, ―The Transmission of Electrical Energy
Without Wires as a Means for Furthering Peace,‖ Electrical World and
Engineer. Jan. 7, p. 21, 1905
WiTricity Corp.Applications of WiTricity Technology,
www.witricity.com/pages/application
The IEEE website. [Online]. Available: http://www.ieee.org/
Brown, W. C., “Beamed microwave power transmission and its
application to space”, IEEE Trans. Microwave Theory Tech., vol. 40,
no. 6, 1992, pp.1239-1250.
www.sciencedaily.com
www.wikipedia.org
BIBLIOGRAPHY
Titumalasetty Krishna Chaitanya
Born in 1992 in PRAKASAM dist. currently pursuing B.Tech
final year in K.L.UNIVERSITY. His areas of interest are
wireless communication and digital electronics.
Email: chaitugutsy@gmail.com
Rayala Ravi Kumar
Mr. Rayala Ravi Kumar pursued his masters, M.E. in
Communication systems from P.S.G. College of technology,
Coimbatore in the year 1998. For the past 15 years he is
associated with Telecom industry and Academia at various
capacities. For 5 years with telecom industry worked on
development and feature enhancements of Networking,
Storage and Security products based on TCP/IP Stack,
Network Management, Storage management, Intruder
Protection and Detection Systems by serving at companies
like Integra Micro Systems, HCL-CISCO, Emulex
Communications and IBM as Software Engineer ( R & D),
Member Technical Staff, Engineer and Consultant. For 9
years in association with Academic Institutions worked as
lecturer, Associate Professor, Professor and Head of the
Department and Prof. In-charge for industry institute
interaction cell. Currently he is working as associate
professor in Dept. of E.C.E. at K. L. UNIVERSITY, GUNTUR.
Email: rayala.rava2013@gmail.com
In the developing world more of the electrical energy is
required so the way of production of energy is much required
in this context, so the way to produce an alternate clean
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