This document discusses wireless power transmission (WPT) as an alternative to traditional wired power transmission systems. It provides background on Nikola Tesla's early experiments with wireless power in the late 19th century. The key components of a WPT system are described, including a microwave generator, transmitting antenna, and rectenna that converts received microwaves to DC power. Advantages include higher efficiency and lower losses compared to wired systems, while disadvantages are higher installation costs and potential interference with communication systems.

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