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Wireless Charging of Mobile Phones using Microwaves PowerPoint Presentation


Free Wireless Charging of Mobile Phones using Microwaves Presentations in PowerPoint format 


Mobile Phone Charging – The New way

Always the recharging of mobile phone batteries has always been a problem for us.
This problem will be solved after our proposal………!!!!!!!!
We are going to add just a rectannae & a filter to the ordinary mobiles during manufacturing time…
Thus the more you talk, the more is your mobile phone charged!!!!!!! This is new isn’t?!! 


The Electromagnetic Spectrum

Microwaves are good for transmitting information from one place to another because microwave energy can penetrate haze, light rain and snow, clouds, and smoke.
Shorter microwaves are used in remote sensing. 
These microwaves are used for radar like the Doppler radar used in weather forecasts
Microwave radiation is still associated with energy levels that are usually considered harmless

TRANSMITTER DESIGN

  • The MAGNETRON is a self-contained microwave oscillator that operates differently from the linear-beam tubes, such as the TWT and the klystron.
  • ——Magnetron is used to produce high-power output required in radar and communications equipment 
  • —Microwaves used in mobile communication are also produced by similar Oscillators 

—WHAT’S RECTANNAE???

    •What’s rectannae you are confused…….it’s nothing but the combination of  rectifier and antenna.

    •Antenna is to receive the microwave signal and it just feed the signal to    rectifier . 

    •Rectifier is to convert the AC signal to PULSATING DC signal.

RECEIVER DESIGN

  • —The basic addition to the mobile phone is going to be the rectenna. 

  • A rectenna is a rectifying antenna, a special type of antenna that is used to directly convert microwave energy into DC electricity.

  • —A simple rectenna can be constructed from a schottky diode placed between antenna dipoles. 
  • —The diode rectifies the current induced in the antenna by the microwaves. 
  • —Rectenae are highly efficient at converting microwave energy to electricity. In laboratory environments, efficiencies above 90% have been observed with regularity.

Why Schottky diodes????

  1. —Schottky diodes can achieve greater switching speeds than p-n junction diodes, making them appropriate to rectify high frequency signals. 
  2. —Schottky diodes are made of single type of doping material, hence based of the major carrier conduction mechanism enabling high frequency switching.(Microwaves are of High Frequency) 
  3. —P=0.6*1=0.6W(Other) P=1.1*1=1.1W(Schottky) 
  4. Though it consumes more power than any other, it suits our application and provide higher efficiency(double). 

—SENSOR CIRCUIT

  1. —In India the operating frequency of the mobile phone operators is generally 900MHz or 1800MHz for communication. 
  2. —LM2907-a simple n F to V converter used as it operates between this specified range , would serve our purpose. 
  3. —F to V would act as switch to trigger the rectenna circuit to ON and the mobile phone begins to charge using the microwave power automatically. 
  4. —This is required, as the phone has to be charged as long as the user is talking.

Conclusion

  • This novel idea minimises the tension of charging your mobile phones regularly. 

  • —No necessity of Chargers accompanying the mobile phone 

  • Efficient use of energy transmitted in the form of microwaves. 


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