Wireless energy transfer experiments ,Builders board

[gotoluc]

Difference measurement with LED

https://youtu.be/PJwnof1eLwU

Zauważyłem, że w tym filmie nie ma przesunięcia fazowego o 180 stopni!
Czy znalazłeś błąd w pierwszym filmie i teraz jest on poprawny (brak przesunięcia fazowego)?

Uwzględnia
Luc

I noticed there is no 180 degrees phase shift in this video!
Did you find an error in first video and now it's correct (no phase shift)?

Regards
Luc

[stivep]

IMPORTANT!!
PART#2
of:
speedy125  link:
This work was supported in part by the Guangdong Natural Science Funds for Distinguished Young Scholar under GrantTitle:
Title:
Wireless Energy Harvesting by Direct Voltage Multiplication on Lateral Waves From a Suspended Dielectric Layer

Link: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8053760

From  part  #1  we have learned   that earth as    multilayered part of interface  is suggested.
that is  in line  with Marconi's early experiments,
the paper explores the feasibility of wireless energy harvesting by direct voltage multiplication on lateral waves.

This dielectric configuration is similar to the 4-layered ground that has already been considered in other studies [14], [20],
with an exception that the bottom layer in the present work is a layer of air with an extremely small conductivity.
The relative permittivities of layers 0, 1, 2 and 3 are respectively ε0,ε1,ε2 and ε3, where ε0=ε3=1.
The thicknesses of layer 0 and layer 3 is assumed to be infinity.
The distance between the transmitting antenna and the receiving antenna is denoted by  r. Layer 1 and layer 2, respectively,
have a finite thickness l1 and l 2. The length of the vertically mounted[/font]dipole is of approximately 1/4 -wavelength of the chosen operating frequency.
The apparent pathway of a lateral wave is highlighted in red.
As shown in Fig. 1, the deeper the dipole is submerged underneath the top surface of layer 1, the more energy
radiated out from the base of the vertical dipole will be striking the interface between air and layer 1 at critical angle
and the more energy will be converted into a lateral wave

-Transverse magnetic field (of TM)  mode  in the multi-layered ground can be modeled infrequency domain.
- dielectric layer can be suspended in mid-air
That alone corresponds  with  my   experiment here:
https://youtu.be/XOTLfnMOSqQ?t=409

Wesley

[stivep]

PART#3
of:
speedy125  link:
This work was supported in part by the Guangdong Natural Science Funds for Distinguished Young Scholar under GrantTitle:
Title:
Wireless Energy Harvesting by Direct Voltage Multiplication on Lateral Waves From a Suspended Dielectric Layer

Link: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8053760

From  part  #1  we have learned   that
-earth as    multilayered part of interface  is suggested.
-that is  in line  with Marconi's early experiments,
-the paper explores the feasibility of wireless energy harvesting by direct voltage multiplication on lateral waves.
-we could also look at  picture  representing multilayered  interface
-  we  had the first look at wave behavior while  "loading" into  interface

From  part  #2  we have learned:
- the  differences  between  regular EM wave known also as Space wave and Surface wave.
- the 4 layer suggested   ground  as one of parts of interface Air/Earth
- the wave  in  the  interface  must  be  in TM  mode
==============================================================

To support propagation of trapped surface waves, a dielectric layer should have a thickness at least half wavelength.
This means that there will not be any significant contribution of energy to the receiving end due to a trapped surface wave
if the suspended dielectric layer is too thin.
. If an incoming electromagnetic wave strikes at either interface of an extremely thin dielectric layer at critical angle,
the electromagnetic energy will be forced to propagate along the upper and lower interface in the form of a lateral wave
with an extremely high current density
Since the lateral wave from the interface between layer 3 and layer 2 has to propagate through a much longer and more attenuated pathway before reaching the receiver,
the contribution of the branch cut k3 to the receiving end can be assumed to be negligible although this assumption can be invalid if the suspended dielectric layer is too thin.
Note: for layers look at picture here:
https://overunity.com/18335/wireless-energy-transfer-experiments-builders-board/dlattach/attach/174186/image//
or at Part#1
Wesley

[stivep]

From Wesley: Special  Thank you speedy125

PART#4
IMPORTANT!!
speedy125 send link:
This work was supported in part by the Guangdong Natural Science Funds for Distinguished Young Scholar under GrantTitle:
Title:
Wireless Energy Harvesting by Direct Voltage Multiplication on Lateral Waves From a Suspended Dielectric Layer

Link: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8053760


From  part  #1  we have learned   that
-earth as    multilayered part of interface  is suggested.
-that is  in line  with Marconi's early experiments,
-the paper explores the feasibility of wireless energy harvesting by direct voltage multiplication on lateral waves.
-we could also look at  picture  representing multilayered  interface
-  we  had the first look at wave behavior while  "loading" into  interface

From  part  #2  we have learned:
- the  differences  between  regular EM wave known also as Space wave and Surface wave.
- the 4 layer suggested   ground  as one of parts of interface Air/Earth
- the wave  in  the  interface  must  be  in TM  mode

From  part  #3  we have learned:
-  that  the thickness of both layers  of the  interface is expected  to be 1/4 of  the  wavelength Y
============================================================

V. HARVESTING ENERGY FROM LATERAL WAVES BYDIRECT VOLTAGE MULTIPLICATION
In one of Tesla's lectures [18], Tesla has highlighted the fact that power transmission
by one-wire transmission line is equivalent to wireless power transfer. Although the link between
power transfer by one wire and wireless power transmission has not been well explored in other research literature,
it was found in a recently published work [21] that the energy from a time-varying electromagnetic field can be
captured by a one wire transmission without any antenna.
In this work, wireless energy is harvested from lateral waves on the surface of a suspended dielectric layer
using a little known open-ended voltage multiplier.
Fig. below illustrates the schematic diagram of the open-ended voltage multiplier similar to the one proposed in .
This open-ended voltage multiplier has an input terminated by an open-circuited Goubau line.
Goubau line is one-wire transmission line having characteristic impedance very close to the characteristic
impedance of free space.
If the end of the Goubau is left open-circuited, it becomes a monopole antenna which captures ambient electromagnetic field right
on the top surface of the suspended dielectric layer without any other form of antenna.
The voltage sensed by the Goubau line is rectified into at DC voltage using the well-known Avremenko's diode configuration formed by diodes
D1 and D2 [22], [23]. Thevoltages across D1 and D2 are very limited because each of the diodes has its own maximum forward voltage.
However, before reaching the output, the voltages across D1 and D2 can undergo voltage multiplication by the differential voltage
multiplier formed by diodes D3,D4,D5 and capacitances C1,]C2,C3 and C4.
The output voltage is the sum of the voltages of all the diodes D1-D6.
The fundamental AC voltage across D1 and D2, 2V D, depends on the time-varying electromagnetic field
captured by the Goubau line, which cannot be changed by changing the circuit topology.
However, the AC voltage across each of all other diodes D3-D6 can be force-increased to a maximum of 2VD by introducing the AC shorts formed
by capacitors C1-C4.
All the diodes used in this circuit are assumed to be the same and all the discrete capacitors used in the circuit are assumed to have a capacitance C.
If the parasitic inductance Lp is sufficiently small, then the output voltage can be derived and approximated using the approach given in Appendix I

n is the intrinsic ideality of the diode.
Is is the reverse saturation current of each of the diodes.
nKT/q is the threshold voltage, which is typical 25 mV at room temperature.
f is the operating frequency.
The formula given in (16) assumes that the load resistance is infinitely large.
The last term of (16) also accounts for the frequency dependent effects due to the capacitances in the layout.

The prototypes for the proposed open-ended voltage multiplier have been fabricated on a Rogers Duroid (TM) substrate 4350B
with thickness=1.52mm.
Fig. 2 shows the details of the proposed open-ended voltage multiplier.
The diodes used for fabricating prototypes in this work were SMS7630-093 from Skyworks.
The schematic diagram, the photo of the fabricated prototype and the simulated electric field distribution
at 1.24 GHz are respectively shown in Figs. 2a, 2b and 2c.
The input impedance of the opened voltage multiplier was approximately 400 ohm according to electromagnetic
simulation.
It should be noted that, for the purpose of verifying the design against the simulation,
the output voltages of the proposed voltage multipliers were first measured as a function of frequency
when the input terminals were fed with a 50 ohm microwave power source (E8267D, Agilent Technologies) at 20 dBm.
The measured results together with the results of layout/schematic co-simulation done using Keysight's Momentum are shown in Fig. 2d.

Wesley

[stivep]

From Wesley: Special  Thank you speedy125

PART#5
IMPORTANT!!
speedy125 send link:
This work was supported in part by the Guangdong Natural Science Funds for Distinguished Young Scholar under GrantTitle:
Title:
Wireless Energy Harvesting by Direct Voltage Multiplication on Lateral Waves From a Suspended Dielectric Layer

Link: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8053760


From  part  #1  we have learned   that
-earth as    multilayered part of interface  is suggested.
-that is  in line  with Marconi's early experiments,
-the paper explores the feasibility of wireless energy harvesting by direct voltage multiplication on lateral waves.
-we could also look at  picture  representing multilayered  interface
-  we  had the first look at wave behavior while  "loading" into  interface

From  part  #2  we have learned:
- the  differences  between  regular EM wave known also as Space wave and Surface wave.
- the 4 layer suggested   ground  as one of parts of interface Air/Earth
- the wave  in  the  interface  must  be  in TM  mode

From  part  #3  we have learned:
-  that  the thickness of both layers  of the  interface is expected  to be 1/4 of  the  wavelength Y

From  part  #4  we have learned:
Basic schematic   of  Avramenko fork and  voltage multiplier   that can be used at any frequency
in association with Goubau line or any other type of interface.
===============================================================================
V. SIMULATED AND MEASURED RESULTS OF BASIC WPT (Wireless Power Transmission)CONFIGURATION
The feasibility of wireless power transfer based on the proposed voltage multipliers has been explored using
the experimental configurations as shown in Figs 3a and 3b. Fig 3a
illustrates an experimental configuration where the transmitted energy is expected to be primarily a lateral wave.
Fig 3b shows an experimental configuration focusing on space waves only.
In either configuration, the transmitting[/font]end is mounted with a base-fed monopole antenna formed by
a planar Goubau line, and the receiving end is vertically
mounted with the proposed open-ended voltage multiplier terminated with a 1M load resistor.
The measured results of this work are shown in Fig. 3c.
Wesley