1. WIRELESS POWER TRANSMISSION
PRSENTED BY:-
ABHISHEK GAUTAM
KRISHNA SAHU

2. CONTENTS
• INTRODUCTION
• HISTORY
• WHAT IS W.P.T. SYSTEM
• COMPONENTS OF W.P.T.

3. INTRODUCTION
 Major issue in Power System- LOSSES
 The percentage of loss of power during
transmission and distribution is about 30-40%
of the total supply in INDIA.
 And that is the reason for introduction of
Wireless Power Transmission System(W.P.T).

4. HISTORY
• Nikola Tesla was the one who invented radio
& showed us the path of “wireless technology”
• He also demonstrated “the transmission of
electrical energy without wires" that depends
upon electrical conductivity as early as 1891.
• In 1893, Tesla demonstrated the illumination
of vacuum bulbs without using wires for power
transmission.

5. WHAT IS W.P.T
 In the transmission side, the microwave
power source generates microwave power.
 The power source is connected through the
Coax – Waveguide Adaptor. It matches the
impedance between the transmitting antenna
and the microwave source.
 The attenuated signals will be then separated
based on the direction of signal propagation
by Directional Coupler. The transmitting
antenna radiates the power uniformly through
free space.

6.  In the receiving side, a rectenna receives the
transmitted power.
 The impedance matching circuit and filter is
provided to setting the output impedance of a
signal source equal to the rectifying circuit.
 The rectifying circuit consists of Schottky
barrier diodes converts the received
microwave power into DC power.

7. Components of WPT System
 Microwave Generator
 Transmitting Antenna
 Rectenna:- Antenna+ Rectifying ckt. with a
low pass filter between the antenna and
rectifying diode.

8. ADVANTAGES
• Higher Efficiency
• Low losses
• Low risk factor
• Failure due to short ckt. Is not possible.
• Low possibility of theft.
• Uneven terrain will also get power.

9. DISADVANTAGES
• Installation cost is very high.
• Interference of microwave with present
communication systems.

10. Biological Impacts
• Microwave radiation level would be never
higher than the dose received while opening
the microwave oven door which means it is
safe.
• It operate with power densities at or below
the ANSI/IEEE exposure standards. Thus
public exposure to W.P.T. fields will be below
existing safety guidelines.

11. CONCLUSION
• This concept offers greater possibilities for
transmitting power with negligible losses and
ease of transmission than any invention or
discovery heretofore made.
• We can send power to you like a cell phone
call – where you want it, when you want it, in
real time