Wireless mobile charging using microwaves

Wireless Mobile ChargingUsing Microwaves

Introduction Mobile phones becoming a basic part of life, the recharging of

mobile phone batteries has always been a problem.

The main objective of this current proposal is to make the recharging of the mobile phones independent of their manufacturer and battery make.

recharging of the mobile phones is done automatically as you talk in your mobile phone! This is done by use of microwaves.

Electro Magnetic Spectrum

Spectrum: The range of wavelengths or frequencies over which electromagnetic radiation extends.

Worlds Most Common Frequency Band

Microwaves

Microwaves are a form of electromagnetic radiation with wavelengths ranging from as long as one meter to as short as one millimeter; with frequencies between 300 MHz (100 cm) and 300 GHz (0.1 cm).

Generally used for Telecommunication etc.

Working of Model

Parts

Transmitter RF Cable Slotted Wave Guide Antenna Sensor Receiver( Rectenna)

Transmitter Section

Transmitter section consist of two parts, They are:

1. Magnetron,2. Slotted Waveguide antenna.

Magnetron

High power microwave

oscillator

Special kind of vacuum

tube

Efficiency 50 to 80 %

Uses CROSSED-ELECTRON

& MAGNETIC fields

Slotted Wave Guided Antenna

Slotted Wave guided Antenna is

used as an omni-directional role.

Is an Horizontally Polarized

Antenna Type.

Is a very low loss transmission line.

RF Cable

Designed to work at RF (multi megahertz range).

High data rate wireless transceivers

Reciever Section

Receiver section consist of 3 parts, they are:1. Sensor,2. Rectenna

Sensor Circuitry

Microwave sensors The circuitry consist of F to V convertor. LM 2907 is used for this conversion.

Rectenna

Invented by William c . Brown in 1964

Dipole antenna with RF diode

In laboratory environments, efficiencies

above 90% have been observed with

regularity.

Advantages Charging of phone is done wirelessly. We can saving time for charging mobiles. Wastage of power is less. Only one microwave transmitter can

serve to many devices for charging. Different type of chargers are

eliminated.

Disadvantages Wireless transmission of the energy causes some effects to

human body, because of its radiation. Charging depends on network coverage. Network traffic may cause problems in charging. Process is of high cost.

Conclusion

Thus this method provides great advantage to the mobile phone users to carry their phones anywhere even if the place is devoid of facilities for charging.

“Time is really the only capital that any human being has, and the only thing he cant afford to lose”

Thank

you