Fractal TV Antenna VS The Ultimate TV Antenna
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- čas přidán 7. 09. 2024
- This video is where i am comparing 2 tv antennas in identical conditions from 60 miles away from the broadcast stations.Fractal TV Antenna VS The Ultimate TV Antenna here the power pack link • How To Make A Power Pack .How to make a tv antenna.how to make a fractal tv antenna. Then a fractal antenna may be your answer. And you can make one yourself, right at home! Fractal antennas uses a fractal design to maximize the perimeter of the material that can receive and transmit electromagnetic radiation within a given total surface area or volume. Sounds complicated, right.This antenna design grew out of my attempts to build an indoor HDTV antenna using fractal patterns after I had watched a TV show and had read a magazine article on the use of fractal patterns in cell phone antennas, My goal was to design an antenna that not only worked well, but one that was easy to build and could be built from easiliy obtainable materials.
The result is an antenna that is somewhat omnidirectional, and performs well receiving digital TV signals at my home from the low end of the VHF high-band (i.e Channel 7 at 174 MHZ) to the high end of the 600 MHz UHF band. (There are no channels in the 700 MHz band in my area, but Channel 51 at 692 MHz is one of the strongest signals here. diy fractal tv antenna for hd digital tv. The first thing I would like to discuss is a little history, theory, and uses for fractal antennas.
Fractal antennas are a recent discovery. First discovered back in 1988 by Nathan Cohen and later published and patented in 1995. A fractal antenna has a few unique attributes as seen in this definition from Wikipedia:
"A fractal antenna is an antenna that uses a fractal, self-similar design to maximize the length, or increase the perimeter (on inside sections or the outer structure), of material that can receive or transmit electromagnetic signals within a given total surface area or volume."
What exactly does that mean? Well, you need to know what a fractal is. Also from Wikipedia:
"A fractal is generally a rough or fragmented geometric shape that can be split into parts, each of which is (at least approximately) a reduced-size copy of the whole,a property called self-similarity."
So basically, a fractal is a geometric shape that repeats and appears over and over no matter how far out or how far in you zoom magnificatio
Fractal antennas have been found to be approximately 20% more efficient than normal antennas. Which could be useful. Especially if you want to make your own TV antenna to pick up over the air digital or high definition video, increase your cellular range, wifi range, FM or AM radio reception, and so on. Most cell phones already have built in fractal antennas. If you noticed in the past few years that cell phones no longer have antennas on the outside. That is because they have a internal fractal antenna etched on a circuit board which allows them to get better reception and pick up more frequencies such as bluetooth, cellular, and WIFI all from one antenna at the same time
"A fractal antenna's response differs markedly from traditional antenna designs, in that it is capable of operating with good-to-excellent performance at many different frequencies simultaneously. Normally standard antennas have to be "cut" for the frequency for which they are to be usedand thus the standard antennas only work well at that frequency. This makes the fractal antenna an excellent design for wideband and multiband applications."
The trick is to design your fractal antenna to resonate at what ever center frequency you wish to receive. Which means it will look different and be sized different depending on what you want to receive. A little math can be used to figure this out. (Or a online calculator)
In my example, I am going to make a simple one but you may want to make a more elaborate one. The more elaborate the better. I will use a spool of 18 Gauge solid core wire to make a antenna as an example but you could go as far as to etch your own circuit boards for aesthetic reasons, to make it smaller, or more elaborate with more resolution and resonance.
I am going to use the example of making a TV antenna for digital or high definition reception for over the air broadcasts. It is easier to work with these frequencies and they fall around half a foot to a few feet in length for half wavelengths of the signal. I am also going to base it off a common dipole antenna for simplicity and cheapness of parts for VHF. For UHF you may want to add a director or reflector which will also make it more direction dependent. VHF is direction dependent as well but instead of pointing directly at the TV station like UHF you want VHF rabbit ears (dipole antenna) to be perpendicular to the TV station. But there is a little more design to that. I want to keep this as simple as possible as it is already a very complex subject.
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I made both antenna's, I put them one at a time in position and scanned for channel signals. My Broadcast towers range at about 35 miles and there are 44 towers. The Fractal antenna got 24 channels, the Ultimate antenna got 41 channels. My mounting location was inside my house, mounted facing north inside a closet at 7 feet. I was impressed. Im going to go one step further and relocate the antenna inside the garage up in the rafters, it will get the antenna at 10 feet which is what TV station locater site recommended will come back when complete and give you the results. So anybody attempting to build one, Im a certified ISCET tech this antenna works and works well. Good job sir,
It's on now! I can't believe all the precious time I'll never get back having wasted it researching the best antenna to purchase. Better late than never having found your vids. Thanks brother!
Yawn .A plant.
Thumbs up for the "fractical". :) Nice work!
TKS MAN I GOT A HELL OF A GOOD ANTENNA COMMING UP SOON..NEVER SEEN I ONLY BUILT IT IN MY MIND BUT IM FINISHED WITH THE MIND PART..ITS GOING TO BE HELL TO BEAT
Several problems in your test. First, you didn't take each antenna and put them in the exact same place when you tested. Second, on your fractal antenna, you used the wrong angles in bending the wire. Third - for the reflector - did you account for the reflector distance? Forth - did you account for the signal loss on the splitter and switch the inputs to verify they are both having the same loss?
Fifth - were you standing in the same spot for each test? Reflection and restriction of signal will happen.
I will say overall - you do have some good info.
Danny, first time that I have seen one of your videos and I am now a subscriber. I am impressed, you seem like good folks.
man yeah i tell it like it is..tks
Only question I have is comparing apples and oranges..by that I mean to do a valid comparison you need to be sure both antenna's are built at the same center frequency, then the comparison is a little more accurate..I'm an retired catv eng.
Yes. the comparison is bogus. See my other post. I am always amused when people try to make comparison that are not valid to sell their products.
cool tv antennas danny
czcams.com/video/t0WoKdMiXfo/video.html link to power pack vid
my experience with a reflector is it will kill a fractal signal.... try it without the reflector and measure... the signal on mine went from 12 channels with it, to 31 without the reflector,... but I have signals coming from 360 degrees... a reflector is only for signals coming from one direction
bones007able - I was also under the assumption a true fractal has 5 nodes.
FYI I just wanted to mention the reason for relocating an testing, the antenna only pulled 1 vhf channel in, I'm interested in seeing if by raising the antenna to 10 feet will get better VHF reception
My favorite and best overall is the GRAYHOVERMAN..... Double-Bubble-Bay..
One channel isn't any type of test of an antenna come on it's overall performance that matters unless you only have one station in your area
Thank you.
TV Signal capture is less of a science
&
more of an Art.
Danny , your videos are awesome. Your design is inspiring. Was thinking of using one of your designs for transmitting with ham radio uhf/ vhf (got a license an all ) . BTW how you get them girls to dance around your drums at the end of sum your videos :) ?
Thank you for your videos how do you set up the signal strength program on the computer to the coaxial?
Your 'fractal' antenna is tuned lower , by roughly 30% in frequency, than your skeleton bowtie. The whole point of the fractal, here, is to make the overall antenna smaller. You kept it the same size. So naturally, its going to operate best at frequencies lower than your TV channels. I appreciate you are trying to sell your skeleton bowties an wish you luck with that. But keep in mind the next time you want to claim 'better' that you compare two antenna designed for the same frequencies. This isn't it.
I was all set to make a fractal antenna. Maybe I'll just stick with my bowtie. Nice work on your antennas, I'm sure customers will like them.
+Dan Baker i sale the fire out of them with a money back gaurentee .nobody wants there money back lol tks
Danny, sell( note correct word choice) what you want, but your comparison is bogus. The fractal works at a different frequency range from your skeleton bowtie.
can I use aluminum tubing for the center pole if I insulate the wires from the tubing?
yes
what would be a nice video is I'd you would do one on coat hanger vs copper wire homemade antenna.
i can do that i all ready tried that off camera...i have more videos comming
+Danny S Hodges that sounds awesome, I look forward to watching it. Thanks!
Ultimate Antenna made with copper wire, fractal antenna is not copper and less conductive. Not a fair comparison.
It’s a practical fractical rat cheer
Hey Danny, great job on your antennas. But I am surprised that someone who takes great pride in their workmanship such as yourself would make an imprecise fractal antenna. I would like to see you redo this comparison with a proper fractal antenna.
Here is a link that has a precise template for the fractal elements of the antenna.
www.ruckman.net/downloads/fractaltemplate.pdf?attredirects=0
You can scale up the antenna but you also have to scale up the distances between each element to the same ratio. The bends and angles have to be very exact for the fractal to get the best results.
I just built one here in Tucson and I'm picking up about 35 or so stations 38 miles away without using a reflector screen. I scaled it up to full wavelength for 560 MHz (Ch 24). The length of the wires were exactly 22 in. and the bends were made exactly every 2.75 inches. I made sure the elements were aligned properly just like it looks in the template.
I have to build an antenna that can pick up stations from 100 miles away, so I really am interested to see how a well made fractal antenna compares to your Ultimate Antenna.
ok i might do that
That is, one that covers the same frequencies and is not detuned to the TV channels. Ask yourself why there are over 1000 videos showing higher signals with the fractal, whik Danny gets lower. Answer: the fractal would have to be SMALLER to cover the same frequencies and hence TV channels. Hey, if you think a bigger antenna with a larger wind load is preferred, then buy Danny's antenna.
MIGHT? So you acknowledge that the comparison is bogus, yet refuse to correct the video, or acknowledge that your antenna has not demonstrated an alleged advantage.
I have 400 channels, and nothin Is on, I threw the tv out
Lol
fractal why not just use a bunch of coat hangers whole uncut.
Lol this guy tho
Smh..