basic overview on wireless charging for beginners

1. Wireless Charging of
Mobile Phones

2. Preview
• Introduction
• Components
• Functioning
• Advantages
• Limitations

3. INTRODUCTION
• The main objective of this is to make the recharging
of mobile phones independent of there
manufacturer and battery make.
• New reforms are now made and now reacharging
can be done when you are talking on the phone.
• This is done by the use of MICROWAVES
• For the transmission of the waves special antennas
are used called SLOTTED wave guide antenna.
• The whole system works at a frequency of 2.45 Ghz

4. Types
• Inductive charging
• Charging using microwaves

5. EM SPECTRUM

7. Components
• Microwaves
• Rectenna
• Sensor
• Filter

8. TRANSMITTER DESIGN
•Magnetron is high power is high power
microwave oscillator and used in microwaves
ovens and radar.
•Magnetron is capable to deliver more power
than reflex klystron or gunn diode
•It is set to effect the path of travel of
electrons that are in trasit from cathode to
anode plate.

9. MAGNETRON

10. SLOTTED WAVE GUIDE ANTENNA

12. RECIVER

13. SENSOR CIRCUT
•Detects if phone receives any message signal.
• Used to charge the phone while talking.
• Thus on receiving a signal the sensor
circuitry directs the rectenna circuit to on &
mobile starts to charging.

14. RECTENNA
•A rectifying antenna is
called rectenna
•It converts the microwave
power to the direct
current (DC) power
•The schottky diode
microwave rectifying
circuit has efficiency
greater 90%

15. ADVANTAGES
•Use of separate chargers eliminated
•Electricity saved
•Phone can be charged anywhere and
anytime
•One microwave transmitter can serve to
all the service provider in that area
DISADVANTAGES
•Bulky
•Heat generation

16. Inductive charging
• Induction chargers typically use an induction
coil .
• The two induction coils in proximity combine
to form an electrical transformer.

17. • Protected connections - no corrosion when the electronics
are all enclosed
• Durability-significantly less wear and tear
ADVANTAGES
DISADVANTAGES
•Lower efficiency
•waste heat
•slower charging

18. Thank you