Radio Frequency Energy Harvesting - Sources and Techniques

A prototype wave energy converter (WEC) was proposed, consisting of a heaving cylindrical buoy with an internal permanent magnet linear generator. A mathematical model of the prototype WEC is derived by coupling a hydrodynamic model for the motion of the buoy with a vibration energy harvester model for the generator. The wave energy resource is assessed, using established mathematical descriptions of ocean wave spectra and by analysing measured wave data from the coast of Queensland, resulting in characteristic wave spectra that are input to the mathematical model of the WEC. The parameters of the WEC system are optimised, to maximise the power output while minimising the pitch motion. A prototype thermal energy harvesting device is proposed, consisting of a thermoelectric device sandwiched between airside and waterside heat exchangers. A mathematical model is derived to assess the power output of the thermal energy harvester using different environmental datasets as input. A physical prototype is built and a number of experiments performed to assess its performance.

RF energy harvesting circuits with on-chip antenna ..

 Keywords:  RF Energy Harvesting, Maximum Power Point Tracking, Energy Storage

A Dual-Band Antenna for RF Energy Harvesting Systems …

The multiband Cantor fractal antenna has been designed and implemented on a package of rectifying circuits using additive manufacturing (combination of 3D inkjet printing of plastic substrate and 2D metallic screen printing of silver paste) for the first time for RF energy harvesting application.

of an RF power harvesting circuit [Ph.D

Indoor and outdoor field tests of the RF energy harvester have been conducted in the IMPACT lab and the King Abdullah University of Science and Technology (KAUST) campus territory, and 252.4 mV of maximum output voltage is harvested.

Hence RF energy harvesting is one the most popular type of power harvesting.
Fiez; Efficient Far-Field Radio Frequency Energy Harvesting for Passively Powered Sensor Network.

of ambient RF energy and the effect of ..

Overall fish oil methyl ester (FOME) showed good combustion properties and environmental benefits.

Key words: Fish, Injection Pressure, Injection Timing, Fish oil Methyl Ester (FOME), Performance, Emissions

Reference
[1] Cherng-Yuan Lin and Jung-Chi Lee, "Oxidative stability of biodiesel produced from the crude fish oil from the waste parts of marine fish", Journal of Food, Agriculture and Environment Vol.8 (2): 9 9 2 - 9 9 5 .

Performance optimization for cognitive radio networks with RF energy harvesting capability.

RADIO FREQUENCY ENERGY HARVESTING ..


Frequency loss was
high
with the distance and as a
Future improvement using a
lower frequency

Power Dissipation
Power Analysis using
LTSpice
Total power dissipation inside the circuit
75.21 nW
Magnitude and phase variation of single stage conditioning circuit with the frequency
Input impedance for different frequencies
Designing of
nanohenry
inductor is
difficult
using available sources.
Accuracy
– (length and number of turns)

Sensor Node
Real Effective, Low power consumption application
Temperature & Humidity sensor which can transmit up to
90m
The
CMOS battery
is charged by our RF Energy Harvester

DHT11
Schematic Diagram
Transmitter
RF 433Mhz module
was use to establish the communication link between Sensor Node & Sensor Data Management System
Manchester encoding
was used to encode the data and On-Off keying was used to modulate the data
REFERENCES
[1] T.

(2016)Energy harvesting for marine based sensors. PhD thesis, James Cook University.

Energy harvesting - For all : Institute of Physics

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