BY,P.SAI KAMAL,ECE 3RD YR,10BA1A0443

WIRELESS

CHARGING

USING

MICROWAVES

HistoryFather of wireless mesh research projects

MIT media labs in 1997

Electro magnetic spectrum

World’s Most Common Frequency Bands

Parts Transmitter

RF cable

Slotted wave guide antenna

Sensor

Receiver (Rectenna)

TRANSMITTER OUTER DESIGN

High power microwave oscillator

Special kind of vacuum tube

Efficiency 50 to 80 %

TRANSMITTER INNER DESIGN

Uses CROSSED-ELECTRON & MAGNETIC fields

RF cableDesigned to work at RF (multi megahertz range)

High data rate wireless transceivers

Slotted waveguide antennaMicrowave radar applications

Direct emission through slots

SensorMicrowave sensors

Raises beep alarm in silent mode

RectennaInvented by William c . Brown in 1964

Dipole antenna with RF diode

Schottky barrier diode

Principle of operation

LM 2907 (F to V converter)

Advantages

Separate chargers elimination

Charges “anywhere anytime” within the location of waves

Disadvantages

Keeping in pocket – “Central nervous system”

Effect on “children”

Present applicationsWIRELESS HOME

NOKIA Lumia 920

IM NEWLY BORN

Present applications

MOJO100

0

Rs

Present applications

MOPAR

Other modesSamsung E1107 Crest Solar powered mobile phone

Inductive charging

Inductive charging

Future Proposal

Conclusion

Novel method of using “power of microwaves”

Can carry in case of “devoid facilities”

QUERIES