HHO Generation using High Frequency electromagnetic waves on water

[Sergh]

The dimensions are approximately the same as in the video from Petros Zografos.
To determine the size I used as sample the white cable that is present in the video. Very roughly.
Transmission lines 16 millimeters, "wings" 22 millimeters by 6 millimeters. The base material is the microwave Teflon 2,5 mm thick. 
Due to the large thickness of dielectric base the line width is increased.I tried to install this antenna near the flange of the waveguide or near the detector diode. The amplitude of the received signal increases significantly.I was planning to solder a Gunn diode in the center hole, but it overheated during soldering.It is a pity that a diode of this size was only one at these frequencies.  I have such diodes for higher frequencies. I will try later with it, it will be soldered with the Rose alloy.
I found interesting Greek article about experiments with underwater communication in the microwave range, from a city called Zografos  :
Thomas Κ. Mpountas, DimitraI. Kaklamani
National Technical University of Athens
School of Electrical and Computer Engineering
9 IroonPolytechniouStr., 15780 Zografos, Athens, Greece

https://www.e-fermat.org/files/communication/Alvertos-COMM-2017-Vol20-Mar.-Apr.-018.pdf

[Sergh]

My guess is that at the same time is need a microwave and a low-frequency magnetic field and special conditions, the composition of the liquid. Magnetic and microwave fields are required in the same way as in the NMR tomograph. NMR tomograph has not only a superconducting magnet, but also gradient coils, creating a gradient magnetic field, that forms a 3D image. In addition, a high-frequency field is needed at the resonant frequency of the substance, which absorbs the RF signal only on a narrow gradient of a certain magnetization.

[kolbacict]

Here I am about the same. Why everyone wants to introduce microwave energy from the air. waveguide or coaxial. Inside the water, without leaving the water, what prevents to do this?

[Sergh]

I tried. Don't work. The generator does not start, or works very poorly. Water absorbs energy and the generator does not produce power. Probably needed other  antennas and generators to create HF vibrations directly in the water. But all components are designed to work with RF transmission in air.


See graphic curves in a Greek article about underwater WiFi communication:

https://www.e-fermat.org/files/communication/Alvertos-COMM-2017-Vol20-Mar.-Apr.-018.pdf
At frequencies of 20 - 24 GHz, everything is absolutely bad.
Microwave hardly penetrates into highly purified deionized water. Must hope only on the surface of the water. By the way, Petros seems so. In the video with a Bow-Tie antenna.

[kolbacict]

I tried. Don't work. The generator does not start, or works very poorly.

something I do not understand, in this case, what could be wifi under water.?

p.s. https://overunity.com/16440/hho-generation-using-high-frequency-electromagnetic-waves-on-water/dlattach/attach/169242/
Has anyone looked at this?