This document discusses wireless power transmission using microwaves. It describes how microwaves can be used to transmit power from a sub-station transmitter to receivers on towers up to 5 km away, converting the microwaves back to electricity. The system allows for wireless switching of home appliances using a remote control that transmits microwaves to appliance receivers. Wireless power transmission via microwaves provides advantages over wired systems such as no wires or risk of hazards, high efficiency over 90%, and lower maintenance costs.

2. CONTENTS
INTRODUCTION
MICROWAVESMICROWAVES
WORKING OPERATIONWORKING OPERATION
MPT METHODMPT METHOD
WIRELESS SWITCHINGWIRELESS SWITCHING
WORKING OF WIRELESS SWITCHINGWORKING OF WIRELESS SWITCHING
ADVANTAGESADVANTAGES

3. INTRODUCTION
 The term wireless transmission stands for interchange ofThe term wireless transmission stands for interchange of
power, electricity, data or any other type of information.power, electricity, data or any other type of information.
 According to the electrical point of view, transmissionAccording to the electrical point of view, transmission
lines are used for transmitting power supply.lines are used for transmitting power supply.
 But there is a major risk of electrical hazards like shortBut there is a major risk of electrical hazards like short
circuits, power failure, & breakdown of transmissioncircuits, power failure, & breakdown of transmission
lines.lines.
 So, we have suggested an innovative idea to overcome allSo, we have suggested an innovative idea to overcome all
these electrical hazards.these electrical hazards.
 Just remove the transmission lines
 For this, we have used microwaves .For this, we have used microwaves .

5. MICROWAVESMICROWAVES
 We have implemented the principle of microwave ovens for our
receivers & transmitters.
 Microwaves have wavelengths approximately in the range of 30
cms (freq= 1 GHz ) to 1 mm (freq= 300 GHz ).
 The term microwaves generally refers to A.C. signals with
frequencies between 300 MHz & 300 GHz.
 The microwave range includes ultra high frequencies ( 0.3-3
GHz ), super high frequencies (3-30 GHz ), & extremely high
frequencies (30-300 GHz ) signals.
 We have used these microwaves for our wireless transmission.

6. WORKING OPERATIONWORKING OPERATION
 Here, the power (electricity) generated at
sub-station goes to the transmitter, which
works like the principle of microwave oven
 This transmitter converts the electricity into
microwaves & transmit them to our service
towers
 When these transmitted waves reach at the
desired tower, (HOME TOWER), the
receiver of home tower receives these
microwaves & converts them into
electricity.The electricity is utilized for our
home appliances.

7. MPT METHODMPT METHOD
 MICROWAVE POWER TRANSMISION ( MPT ) method is
the use of microwaves to transmit power through outer space or
the atmosphere without the need for wires.
 The rectenna converted microwave power into electricity.
 In principle, rectenna is capable for very high conversion
efficiencies– over 90% in optimal circumstances.
 Most proposed MPT systems includes a phased array microwave
transmitter.
 They have advantage of being electrically steered and easier to
scale the necessary levels that a practical MPT system requires.

9. WIRELESS SWITCHINGWIRELESS SWITCHING
 Now further we can use the microwaves received by our
home tower for wireless switching also
 By using wireless switching, we can make the whole
transmission wireless....from sub-station to our home
appliances.
 There is no need of electrical wires to control our electric
home appliances like fans, tube lights, washing machines
etc…

10. WORKING OF WIRELESSWORKING OF WIRELESS
SWITCHINGSWITCHING
 for wireless switching, we use a TRANSCIEVER, a
combo of transmitter & receiver, in our home tower.
 This receives & transmits the microwaves directly to the
transceiver of our hand held remote control.
 Now we can control our home appliances by operating
this hand-held remote control
 Now the microwaves transmitted by this remote control
are received by the receiver of our home appliance.
 And thus, we can control our home appliances wirelessly.

11. SOME TECHNICAL DATASOME TECHNICAL DATA
 Here we can use microwaves having frequency of 4 to 8
GHz , which is very well known as the C-band of
microwave spectrum.
 By using this frequency, the microwaves at our service
tower can cover the area of approximately 4 to5 Kms.
 So, here we can put our service towers at large distance &
we can transmit power with less power loss compare to
other transmission methods.
 And microwave have efficiency over 90% as proven by
the researches held at Reunion islands, Indian Oceans.

12. ADVANTAGES OF WPT
No wires
No e-waste
Need for battery is eliminated
Efficient energy transfer
Harmless, if field strengths under safety levels
Maintenance cost is less

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