Brazillian Antenna Scam

[CCitizenTO]

I have seen some forum dedicated to trolling scammers.
If you want them to reply you need to look like an absolute idiot and pretend they will have their money if only they help you overcome your irrational hurdles.
Scammers will actually go to great lengths for a promise of $70k but they need this dangling carrot

You're thinking of 419eater.com

Primarily devoted to scambaiting and wasting time of scammers. It's called 419 because that's the fraud section of the Nigerian criminal code.

[EEVblog]

He replied!
Surprisingly detailed for a scammer 

[ataradov]

He may be just misguided, not a scammer. There are things like fractal antennas that sometimes give marginal increase in performance for the same physical footprint. There are many designs, some are patented.

It is also likely that his measuring technique is not correct. Especially given the claimed range of frequencies.

From a scammer point of view it is much easier to pretend to be a windows support.

[Bud]

Yes,yes
"The equipment used us expensive and complex"  , but "I do not have an oscilloscope or a signal generator".   
I am still "using frequencies between 700MHz and 47GHz".  I am farting into the antenna. 

Edit: some member of thus forum might be having fun playing a game.

[vsmith]

To state something pretty obvious, that range of frequencies, or rather wavelengths, covers antenna technology markedly different at either end of the spectrum. Antenna gain is dependent on (among other things) frequency selectivity over a narrow range. In fact it is a huge challenge to make antennae that can operate with any gain across an octave band of frequencies, much less across the many octaves as he describes. And the behavior of electromagnetic energy at very short wave lengths such as at the 47 Ghz end, requires quasi optical techniques that would be totally ineffective at 700Mhz. Now he may be describing an invention based on a principle that works equally well over any small range of frequencies anywhere in that larger range, rather than covering the whole range. But even so, physics is physics. I like Bud's thought....maybe it is a prank being played just to get us all discussing it, theres just enough engineering lingo sprinkled around there to make you wonder...

[xrunner]

He speaks of antennas made of copper, but then he seems to claim he improved them by using a metal, an alloy, that was of three, then 12, "elements". I was first thinking could an antenna's directionality or beamshape be formed partially with different "elements" or alloys for different parts of it? But I don't even think that is the claim. I think it's an alloy for the entire antenna. I don't see how that would be a useful parameter to help make an antenna have more gain.

He does seem to know terminology and use it to help the case. Keep playing - insert another quarter for another message.

[Bud]

How would one " create a mixture of 12 elements" to make an alloy. On the stove in the kitchen? And then use  a hummer , tin snips and files to make a cell phone antenna. Sounds credible.

[thm_w]

He knows his test gear at least: https://www.keysight.com/en/pd-1000002103:epsg:pro-pn-8565E/portable-spectrum-analyzer-9-khz-to-50-ghz?&cc=CA&lc=eng

Although I'm not sure what is being used to generate the signal, the tracking gen goes to 2.9GHz.

[Jay_Diddy_B]

Hi group,

Just pointing out that 5% change in antenna gain is 0.2dB

I am sure you get more variation than this depending on how you hold the phone.

A good question would be 'How does this impact battery life?'

5% change in transmitter efficiency would have very little impact on battery life.

Regards,

Jay_Diddy_B

[SiliconWizard]

47 GHz! That's something!

[m3vuv]

is he a nigerian on the run in brazil?

[IconicPCB]

A Nigerian may be better than a Brazilian....