Warning: Creating default object from empty value in /homepages/11/d132647312/htdocs/Amfone/mkportal/include/SMF/smf_out.php on line 47
Zenneck Waves: How to make.




 
The AM Forum
December 11, 2017, 06:06:02 AM *
Welcome, Guest. Please login or register.

Login with username, password and session length
 
   Home   Help Calendar Links Staff List Gallery Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Zenneck Waves: How to make.  (Read 823 times)
0 Members and 1 Guest are viewing this topic.
WA4WAX
Member

Offline Offline

Posts: 170


« on: October 31, 2017, 02:16:33 PM »

This might be a starting point.  Doublet probes for generating Zenneck Surface waves. 

Someone ought to try this out in the 160 to 190 KHz band.......or even on 160!

These waves are the basis of Tesla's longitudinal electricity. They are guided waves.  They are not Herzian waves.

https://patents.google.com/patent/US20140252865A1/en?inventor=corum

Logged
WA4WAX
Member

Offline Offline

Posts: 170


« Reply #1 on: October 31, 2017, 04:28:20 PM »

This should provide strong incentive to you 160 meter people.

One of these doublets would be very small compared to the usual antennas.  Best of all, you do not get a square law fall off.......50 or 100 watts would go a long way.

Use an air core made from #12 or #10.  About 30 uH would be a good start. Space about 3 wire diameters.  Do not close wind.  Go out along the axis of the coil from either end with some 1/2 copper pipe.  I would try about 4 feet in either direction initially.  Then, do a 90 degree turn with an elbow connector, and go out about 4 feet horizontally.  Add cylindrical electrodes, maybe 4 inches in diameter, and telescoping so surface area may be adjusted.  I would start with the bottom electrode about 5 feet above the ground.

Find the resonant frequency by dipping the big coil.  Once found, put a sensitive FSM off in the distance and look for a deflection.  The GDO should provide enough juice initially.  Adjust the height of the bottom electrode from ground, and the space between the top and bottom electrodes.  This may take some fiddling. 

If you nail it, go in with a link coupling loop and match to 50 ohms.  Then turn it loose......
Logged
WA4WAX
Member

Offline Offline

Posts: 170


« Reply #2 on: November 01, 2017, 01:05:36 PM »

Yes, they are real.  We want to generate them on 160 meters, 473 KHz, 160-190 KHz, etc.

The wearable fabric is nifty stuff!

Folks, we live in a waveguide.  Always remember this interesting fact.

http://www.southgatearc.org/news/september2013/gekko_surface_wave_wireless_technology.htm#.Wfn-A01e4dU
Logged
WBear2GCR
Member

Offline Offline

Posts: 3426


Brrrr- it's cold in the shack! Fire up the BIG RIG


WWW
« Reply #3 on: November 04, 2017, 07:45:42 PM »

WHOA!

This huge!

http://www.popularmechanics.com/technology/infrastructure/a8778/skimming-the-surface-the-return-of-teslas-surface-waves-15322250/



Logged

_-_- bear WB2GCR                   http://www.bearlabs.com
WA4WAX
Member

Offline Offline

Posts: 170


« Reply #4 on: November 04, 2017, 08:36:59 PM »

To say the very least!

This technology might drive a sort of renaissance on 160 and the VLF bands.  If the FCC allowed licensed amateurs to run about 25 watts on the VLF bands with Zenneck probes, that would be great!

For county and regional work, it would be like having a private phone line.
Logged
WA4WAX
Member

Offline Offline

Posts: 170


« Reply #5 on: November 04, 2017, 08:46:46 PM »

Here is an interesting pdf for interested parties.

http://emlab.utep.edu/ee5390em21/Lecture%2021%20--%20Surface%20waves.pdf

In optics, they call them evanescent waves.

http://emlab.utep.edu/ee5390em21/Lecture%2021%20--%20Surface%20waves.pdf
Logged
W7TFO
WTF-OVER in 7 land Dennis
Contributing
Member
*
Offline Offline

Posts: 2178


IN A TRIODE NO ONE CAN HEAR YOU SCREEN


WWW
« Reply #6 on: November 04, 2017, 10:25:29 PM »

In a similar vein, I know of a privately-held early copy of J.C. Maxwell's description & use of scalar waves.

73DG
Logged

Just pacing the Farady cage...
WBear2GCR
Member

Offline Offline

Posts: 3426


Brrrr- it's cold in the shack! Fire up the BIG RIG


WWW
« Reply #7 on: November 05, 2017, 04:32:09 PM »



https://www.raytheon.com/capabilities/products/hfswr/
Logged

_-_- bear WB2GCR                   http://www.bearlabs.com
WA4WAX
Member

Offline Offline

Posts: 170


« Reply #8 on: November 06, 2017, 01:04:55 PM »

Here is something to pour over.

Look at how small that 6 meter (nominal) doublet probe is.

http://www.texzontechnologies.com/wp-content/uploads/2016/09/TEXZON_Baylor_Corum16.pdf
Logged
WBear2GCR
Member

Offline Offline

Posts: 3426


Brrrr- it's cold in the shack! Fire up the BIG RIG


WWW
« Reply #9 on: November 29, 2017, 10:09:04 PM »

I've been reading over this stuff... fascinating.

Almost science fiction in how it works.

The thing that remains unclear to me at this point is the shape of the Zenneck wave emission/radiation
in the horizontal plane?? Does it diverge omnidirectionally, or is it of necessity narrow and limited in width?

I'd urge anyone interested in this at all to read [0189] in the patent. About page 40.
It's a jaw dropper, imho.

IF the effect is linearly proportional in distance to wavelength, I estimate that at ~450kHz. one could
cover about 360 miles. So at 225kHz, 720miles... that's pretty significant.

Strange stuff there.

              _-_-

* ZENNECK WAVE ANTENNA pat20140252865.pdf (2877.06 KB - downloaded 25 times.)
Logged

_-_- bear WB2GCR                   http://www.bearlabs.com
KC2ZFA
Member

Offline Offline

Posts: 336



« Reply #10 on: November 30, 2017, 11:13:04 AM »

Section [0020] of this patent is nonsensical as it claims that if I turn on an EM source in a wave guide, and thus excite propagating waveguide modes to the left and right of the source, I would not be transmitting energy out to +/- infinity along the axis of the waveguide. A propagating EM wave, irrespective of the medium and geometry it propagates in, carries momentum away from its source...you have to do work to transmit. The authors of the patent believe that this is not so.

Logged
WBear2GCR
Member

Offline Offline

Posts: 3426


Brrrr- it's cold in the shack! Fire up the BIG RIG


WWW
« Reply #11 on: December 01, 2017, 06:41:04 PM »

I can not speak to this point directly.

But it appears from what I have read that a small % of the energy is spent/used/wasted in the process
of generating and maintaining the basic Zenneck (surface) wave. After that, the claim is that the only time
additional current/power is drawn is if a suitable load/receiver is at some distance.

This is in contrast to the "normal" way that we transmit "radio waves". That's what the graphs are showing...

                         _-_-
Logged

_-_- bear WB2GCR                   http://www.bearlabs.com
Pages: [1]   Go Up
  Print  
 
Jump to:  

AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
 AMfone 2001-2015
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
Page created in 0.051 seconds with 18 queries.