Ham Radio Reveals ‘Senior Slip’ in Innovation Research

My guess is ...You like fractal design ground planes too.
Thanks for sharing .
73

 

Well,yes, it's bent with specific lengths, but a vertical, with two 90 deg bends, correct?

 

Yes, and the lengths are not arbitrary. Its a 50 ohm antenna for the band you choose to 'cut' it for. You can do pretty well with it on other bands, if you use a tuner.

 

Not 'like'....Actually I am sick of fractals Been almost 30 years....I view them as a very useful tool.

 

These are three lightning strikes on golf greens. Golf greens have very uniform laying-in of sand, soil, moisture and grass, so as a result, the lightning (RF) charge, if it hits, ends up dissipating in a uniform way (not one or lop sided). The lightning does not form burnt sheets. It forms fractals. Its the optimum way of dissipating the RF charge.

It sure didn't make a RADIAL , straight pattern! And it could have, if that best dissipated the charge...

In antennas, GP's are employed to DISSIPATE charge...

Why we use straight radials....who the heck knows?

It may have been EASY but was not well thought out---for almost 100 years.

Man, I feel REALLY old....

 

Finally a reply that caught my interest. Thank you!

 

Which one--the feeling old;-)?

(I do try to have a sense of humor...)

 

Actually I'm very much your junior. So I'll let your superior judgement guess which other post.

 

Heheh!

But its sure is fun to figure out science from a golf course!

People struck directly by lightning get these fractal tattoos also....those pictures I won't show, but they are on the net.

 

Hole in one!

 

I'm probably pushing it a bit but what does the second iteration look like? I'm assuming that each straight section of the first iteration is either another dogleg or a Cohen dipole?

One point I didn't mention about my lashup FracVert is how quiet the antenna is. The noise level on 20m is reduced by 2-3 S points over the dipole allowing a higher signal to noise ratio on nearly all signals.

Regards,

Chris, G4HYG

 

If I wanted to build the FracVert, what 'constant' would I use to calculate the length of the sections? The old chestnut of '468' to get the half wavelength? or '492' for free space? or what? (yes, I know none of the sections are a half wavelength, but I can use that to extrapolate or interpolate the different sections)

Then, say the antenna is built and I find it's a bit off frequency... I presume that you would have to appropriately adjust each of the three 'legs' to trim it to frequency? Or can you get away with only trimming one of the legs?

 

Different high angle nulls. The FRACVERT HALFWAVE has better low angle and far reduced gain at high angles in comparison. You must have quite a bit if higher angle noise at that QTH...

 

You can tweak and prune by messing with the top section length and leave the others the same.

Assume free space speed of light... then you can prune shorter if needed.

 

Put a small three sided, smaller box imposed on each straight line...

I am saving that as fodder for any article, if the interest is there.

Frankly, if you want to write up something together for Radcon (RSGB) that would take a time issue off my back. Also resolve the ARRL stonewall.