A PHONE THAT HAS NO BATTERY AND IT WORKS WITH THE SIGNAL POWER

1. GUIDED BY ABHIRAM J
MR.SREEHARI V K REG NO:17201080
(Lecture of ECE) ROLL NO:01
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2. CONTENTS
 INTRODUCTION
 HOW ITS WORKS
 ADVANTAGES
 LIMITATIONS
 FUTURE ENHANCEMENTS
 CONCLUTION
 REFERENCES
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3. INTRODUCTION
 Even the companies that sell smart phones at
phenomenal rates have the issue of battery’s
performance.
 The performance is better as compared to others, but it is
still a mystery if discussed in terms of long life.
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4. What is batteryless phone?
 Needed no battery.
 Phone used to only calling function.
 device uses a minute photo diode to harvest energy from the
ambient light or RF sources.
 It operate the RF wave to convert DC power.
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5. Conversion of RF to DC power
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6. WORKING
 Antenna receive RF wave.
 RF to DC converter convert radio frequency signal
to DC.
 Power condition check the required voltage and fed
to the output.
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7. Conversion of Signals to Power
 A photo diode for converting ambient signals and
light into current.
 It is a semiconductor, with p-n junction diode and an
intrinsic layer between two junctions.
 When photons of energy greater than 1.1 electron volt
(eV) strike the diode, electron-hole pairs are
originated.
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8.  Holes proceed toward the anode and the electrons
move toward the cathode(generate photo current).
 The sum of photocurrents and dark currents, which
flow with or without light.
 It is the amount of current progressing through the
photodiode.
 Small amount of power is generated in the battery less
phone with the assistance of a tiny photo diode.
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9. Structure of a simple photo
diode
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10. PROTOTYPE
 The team of researchers utilized the shell components on a
printed circuit board.
 It perform basic functions like calling someone up and then
hanging up the call without any inadequate call drops.
 A custom base station collects the data in form of digital
packages with the help of a “Backscatter.”
 The device inherits the signals with a technology referred as
“Zero Power Amplitude Modulation.”
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11. SHELL COMPONENT
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12. BACK SCATTER
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13. How solar cell works?
 Solar cell constitutes of P-N junction diode, which is
assembled from Silicon and Germanium.
 This process constructs open space for light to fall on P layer
and hence underlying the P-N junction.
 The bottom of N layer comprises of current assembling
electrode.
 When a light photon arrives at the junction, they exhilarate
electrons from valence band to conduction band.
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14. A solar cell used as in the
battery less phone
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15. ADVANTAGES
 Conserves Electricity
 Saves Time
 Low Power Consumption
 No Charging Issues
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16. LIMITATIONS
 Limited range
 Use of solar cell
 Lacking multiple operational features
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17. FUTURE SCOPE
 Increase in the range
 Encryption
 Video streming
 Internet access
 Low power E-ink display
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18. CONCLUSION
 It was extremely astonishing to witness that a group of
researchers have finally developed a phone that uses no
power.
 which means the phone has no battery and harnesses energy
from ambient signals and light sources.
 That convert light and signal strength into a current which is
furthermore converted into few microwatts of power.
 With the phone, we can just dial a number and call to another
person.
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19. REFERENCE
 Paret, Dominique. RFID at ultra and super high frequencies:
Theory and application. John Wiley & Sons, 2009.
 Shin, Choonsung, Jin-Hyuk Hong, Anind K. Dey,
"Understanding and prediction of mobile application usage for
smart phones", In Proceedings of the 2012 ACM Conference
on Ubiquitous Computing, pp. 173-182. ACM, 2012.
 Goodenough, John B., Kyu-Sung Park,"The Li-ion
rechargeable battery: A perspective." Journal of the American
Chemical Society 135, No. 4, pp. 1167-1176, 2013
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