Spray on antenna?

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yo3hjv

Junior Member
Feb 20, 2012
1
0
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Actually, DID anyone some tests about this tricky antenna material?
Is "on market" for about a year... Searched on net, nothing found!
I only have a question to the inventor: Why is not independent tested?
db's don't come from nowhere!
 

E Kafeman

Junior Member
Feb 20, 2012
1
0
0
A cellfone antenna have typical 50-70 % efficiency => Tx with 1 Watt results in 0.7 Watt radiation in the air. Add some magical dust and it radiates 100 times more=> 70 Watt.
Nice invention, 1 Watt input gives 70 Watt free power.
A small amount of this free power can be received again and used to recharge the phone. Add some magic dust also on the RX antenna and it will amplify receved power another 100x.
A few phones under the hood of a electric car and its performance have been multiplied 100x. Will blow the dust of any existing car.
Anyone medium educated that believes this? Spray some dust on your brain, you need it.
 

TheInternal

Senior member
Jul 7, 2006
447
0
76
interesting thread. Being prior military and having heard of a few various antenna and signal boosting technologies, I'm curious to hear results of independent testing as well.
 

mindless1

Diamond Member
Aug 11, 2001
8,696
1,726
126
Many outdoor omni antennas (like this type, http://www.gnswireless.com/GNS1401.htm ) have what is essentially a long narrow copper plated PCB in them that is not too much different than if you were to take the same sized template and spray a conductive metal paint strip onto a flat surface.

I have no doubt a spray on paint can create a usable antenna if the designer uses it properly, but I do feel the dB gain figures seem questionably high when above conventional antenna figures, and so the marketing a bit suspicious.
 

SuperFungus

Member
Aug 23, 2006
141
0
0
These idiots have a video on 'solve for x'

http://www.youtube.com/watch?v=4efE_gO9lFo

Just to give you an indication of what level these guys are at, their slides abbreviate milliWatts as 'Mw'. Their old website quoted performance improvements in "Db's".

None, and I mean NONE of the tests this guy talks about are remotely valid.

He talks about how his system was '10 dB' better than the military one and they determined this by running around in the woods. That is not how RF measurements work, you put your antenna in an anechoic chamber and compare its performance to a known reference. 10dB variations in a link are COMMONPLACE when you're running around in the woods.

He talks about improving the gain of an iphone antenna by "20 dBm". Incorrect units again. Second he says they made the measurement in a faraday cage. That is a completely invalid procedure. Worse than just doing in in the open. Third it looks like the antenna is sticking up out of the iphone case, which is a HUGE and totally unfair advantage to give the antenna. Fourth, he has no way of measuring that antenna in a 'simulated phone call' because a) Cell phones scale their output power to make the link. b) Cell links are digital so all he could measure is BER (and only if he had access to the cell network that a normal person wouldnt have). Even with the BER you cant directly back out antenna gain.

Even in his posts here he demonstrates that they know NOTHING about antennas. He's spouting off about "SWR". SWR is not an antenna performance metric, its a measure of the quality of the match. I can hook up a 50 ohm resistor and get an incredible broadband match (good SWR) but it wont radiate worth a damn.

The basic premise of the claim doesn't even make sense. The gain of antennas is not really a function of the material so much as the design. Its like if you have a reflector for your flashlight and someone claimed to have a coating for that reflector that makes the reflector SOO shiny that it will narrow the beam of the flashlight 100x.
 

wirednuts

Diamond Member
Jan 26, 2007
7,121
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yep. antennas are much more about design then they are the conductive materials they use. i hear that cellphones can benefit from a fractal design antenna pattern, which i would imagine is a lot easier to make if you could just stencil out a shape and spray some metallic paint on it
 

PsiStar

Golden Member
Dec 21, 2005
1,184
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Ok ... I tried to be supportive of this. "This" being the spray on antennas. There are a number of places "printing" antennas with more or less glorified printers so a spray on is not a huge leap. However some precision is necessary and as one who works in this field "some precision" depends on factors such as desired performance, the frequency, the bandwidth, the material that the antenna is sprayed on, etc. And there are many et ceteras. I was hoping that this guy would come back on here & engage us is some dialog.

This youtube video is so bull shit. Sorry. I cannot think of a more scholarly or scientific term. I could not get past the first 1:30. The guy has absolutely no concept of what he speaks. What he is selling is no different that the stick on (to cell phones) antennas of several years ago ... as one example.

The web site does have their address which can be google/bing mapped & shows what is easily just a mail stop. I hope to hell that he is not selling enough of this stuff to be able to pay for actual office space.

One might ask, "how is he getting this material in a spray can?" Well ... there are contract manufacturers around the world (such as China) which will make anything you want to your specs. This requires only some $$ up front to have it done. No property or employees are necessary. This is just a guess tho.

I also for the 1st time ever reported that video to youtube as "misleading".
 
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wirednuts

Diamond Member
Jan 26, 2007
7,121
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Maybe a job for a 3D printer/process

my god i would love to have one of those. who knows, maybe 20 years from now you will be able to buy them at home depot and they will run off a 120v outlet in your garage.

the possibilities would be unbelievable! fix pretty much anything! i would make a computer case first, then a marijuana pipe
 

C1

Platinum Member
Feb 21, 2008
2,385
113
106
my god i would love to have one of those. who knows, maybe 20 years from now you will be able to buy them at home depot and they will run off a 120v outlet in your garage.

the possibilities would be unbelievable! fix pretty much anything! i would make a computer case first, then a marijuana pipe

Are you alright?

Woman's jaw reproduced by 3D printer
http://www.zdnet.com/news/womans-jaw-reproduced-by-3d-printer/6343303

Rolling off the 3D printing press... the world's first 'printed' car - and it actually works
http://www.dailymail.co.uk/sciencet...printed-car-rolling-3D-printing-presses-.html
 

mindless1

Diamond Member
Aug 11, 2001
8,696
1,726
126
my god i would love to have one of those. who knows, maybe 20 years from now you will be able to buy them at home depot and they will run off a 120v outlet in your garage.

the possibilities would be unbelievable! fix pretty much anything! i would make a computer case first, then a marijuana pipe

$60 worth of stuff from a multi-million dollar printer...
 

SuperFungus

Member
Aug 23, 2006
141
0
0
yep. antennas are much more about design then they are the conductive materials they use. i hear that cellphones can benefit from a fractal design antenna pattern, which i would imagine is a lot easier to make if you could just stencil out a shape and spray some metallic paint on it

This spray has no advantage over a photolithographic processes. Photolithography is more mature, cheaper, and more accurate that this spray on crap. Yes, even for prototyping.
 

Techocity2013

Junior Member
Jul 19, 2013
2
0
0
Q:

Can anyone give us/me a new update on this so-called claimed "Spray on Antenna" fix technology?

I myself think that these two guys are in fact looking for big angel FISH$!

Thanks for any help.

Techo:whiste:
 

bryanl

Golden Member
Oct 15, 2006
1,157
8
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The product does not work as claimed and can not work as claimed.

"capacitors charge and discharge extremely quickly in real time"

I've never heard of capacitors charging or discharging in anything but real time.
 

Techocity2013

Junior Member
Jul 19, 2013
2
0
0
The product does not work as claimed and can not work as claimed.

"capacitors charge and discharge extremely quickly in real time"

I've never heard of capacitors charging or discharging in anything but real time.

I agree.

This so-called "new" fix technology is misleading!
The funny thing is, when I go to pull the patent updates info there is nothing that can be found, at this point anyway???
United States Patent Application
20120146855
Kind Code
A1
SPENCER; Rhett Francis ; et al.
June 14, 2012

TECHNIQUES FOR CONDUCTIVE PARTICLE BASED MATERIAL USED FOR AT LEAST ONE OF PROPAGATION, EMISSION AND ABSORPTION OF ELECTROMAGNETIC RADIATION


 
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