The document discusses a power harvesting metamaterial that captures background radiation and converts it into electricity from various sources, such as satellite transmissions and Wi-Fi. It explains the construction and efficiency improvements of metamaterial arrays compared to single-unit cells, achieving maximum efficiencies of 36.8%. The technology has applications in wireless charging for devices like cell phones.

1. Power harvesting Metamaterial
A.Naga Mounika ,
IV B.Tech, ECE,
Sree Vahini Institute of Science &
Technology ,JNTUK

2. Working Process2
Introduction1
Applications4
3 How to Generate?
Contents :

3. 1. Introduction
•There are several kinds of sources available to generate an
electricity .
•For example wind energy, hydro power, tidal power, nuclear
power, solar power, coal power, energy from burning fossil fuels
etc.
•There is also a new method by using a Metamaterial.
• It is nothing but capturing background radiation and
converting it to electricity.
•It could be used to capture 'lost' energy from a range of sources
such as satellite transmissions, sound signals or Wi-Fi.

4. What is Metamaterial ?
A synthetic composite material with a
structure such that it exhibits
properties not usually found in natural
materials.
These are created with repeating
units, each of which contain two
variable capacitors.

5. •A split-ring resonator (SRR) is an artificially produced structure
common to metamaterials.
• A single cell SRR has a pair of enclosed loops with splits in them at
opposite ends.
split-ring resonator.

6. Step 1: Constructing circuit on metamaterial
Step 2: Forming the array of metamaterials
Step 3: Inserting array in a waveguide

7. .
Step 1: Constructing a circuit on metamaterial
• SRR couples to an incident field and can be loaded with variety of circuit
elements.
• They are Greinacher circuit, schottky diode, resistive loads etc.

8. Step 2: Forming the array of metamaterials
i.e., it captures more of the
electromagnetic energy.
The power harvesting metamaterial
array is more efficient than the single
unit cell.
The maximum efficiency of the single cell is
14.2%
The maximum efficiency for the array is
36.8%

9. Step 3: Inserting array in a wave guide
• To observe power harvesting capabilities, the cell is placed in an open,
TEM waveguide
• It is capable of providing 7.3V of electricity.

10. 3. Working Process
V-
Signal Generator Amplifier
Oscilloscope
V+ SRR
Waveguide
Experimental test setup schematic:
Input power is measured with a spectrum analyzer con-
nected to the signal generator and amplifier via the open waveguide

11. 01/15/17
Working Process
• Measured efficiencies of both the
single and the array of power
harvesting SRRs
• Also shown that the open circuit
voltage, VOC, a load-independent
measure of
the available voltage harvested by the
array of SRRs.

12. 4. Applications :
•A phone can be charged wirelessly while not in use, if
this Material could potentially built in to a cell phone.
Material

14. Thank youThank You