Rubber ducky antenna simple circular polarization hack
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- Опубліковано 22 жов 2019
- This is how to make a very basic polarizer for a 5.8GHz stock whip antenna. While it might seem to good to be true, it isn't. There are no tricks here, just pure physics.
Element length: 0.62-0.66" (16cm)
Tilt angle: 40-50 degrees (.44-.52" tall) - Наука та технологія
You have, in this video, earned my business from here on. What a wonderful gift to the FPV community. Thank you.
Thank you!
That's why I went with his products I watched a few videos and seen he was a good dude helping people out.... I like to give back to people who help others so thank you ibcrazy
@@CAGreve1231 what are the measurements for 900 and 2.4? I’m running redundant open source bridges and would like to get to 40 km.
The contributions you have made over the years and the willingness for you to show people how to do it themselves is why you are one of my favorite people of FPV.
You will never see true are see doing stuff like this for us. Alex is always helping the FPV community no matter who you are or what you have. Thank you so much!
Antennas are black magic, thanks for these amazing educational video Alex!!
Awesome that you make these videos for us to try our hand a making some antennas, thank you but i love your antennas and will continue to buy them 👍
you are blessing for the community Alex, thank you for your work
Good on you for sharing this info with the community! That is why I only use VAS! You sir are a blessing!
Another peek into the mind of an rf genius! Thanks for all you do Alex!
Thank you so much for everything you give to the community 😁 you are just awesome 👍
You're a gentleman and an RF genius. Thank you for all you do.
Thank you!
Thanks for sharing with us Alex. Great stuff.
Excellent presentation. Thank you for all your antennas. The only ones on my quads are yours!
Outstanding. Such a great explanation.
Thanks Alex for another great video
Great video as always! Thanks for sharing!
I am SO impressed buy your way of doing business, and i have great faith in your products!
Thank you! I have to admit, I just bumble my way through business. Being an engineer is more natural, so I focus on that.
Great vid and info as usual! Thanks! :D
Thanks .... loved it ! Respect
To cool and this is just one of so many reasons you will forever be my go to for FPV antennas then now and forever, still rocking my original LHCP pepperbox on the fatsharks with incredible results! Still waiting on the LHCP sky hammer 😉😉
🍻cheers🥃
Coming soon. I keep running out of parts because I forget to order stuff...
It happens! Can't wait! I know its going to be incredible!!!
🍻cheers🥃
Thanks Alex, your generosity knows no limit. Love your VAS products. Is this possible for 1280mhz? Thanks from the Emerald Isle 🇮🇪
When you are filming a subject or an object which is always at the same distant of the camera, please disable the auto-focus and use the manual focus, the constant auto-focus process makes us dizzy lol
Thanks as always for the fantastic videos, we love you Alex
I need a better camera... This auto-focus is driving me nuts and the manual focus often comes out blurry because the LCD screen is so tiny.
man you are some sort of wizard, this would be cool for micros
PS you should put a link to the VAS version in the video - you need some more self promotion!!
and im lazy
@@killadrones9432 - Here's a micro antenna for you that operates on the same principal shown here: www.videoaerialsystems.com/collections/antennas/products/micro-switchblade
You are the man Alex, This is super awesome of you to share! Thank You so much.
I am curious what the measurements might be for a micro whip? would be awesome to know as i have a couple of those as spare in the kit for my older unify pros with ipex.
I Always have appreciated your detailed well researched info. Thanks again and again.
See You In The Sky
Michael STONEWULFF
Can you link me to what you are referring to? The length of the parasitic elements remains constant (well, sort of, anyway), but the angle changes with the proximity to the center. The main issue is that as you get closer to the dipole, the impedance begins to shift greatly and the dipole must be modified for performance. The smallest size you can go without excessive de-tuning of the dipole is 3/4" in diameter (in which case the tilt angle is reduced to 35-40 degrees or about .42" in height).
If you are looking for a micro antenna, I already make the micro-switchblade for micro sized quads and airplanes where the center is already modified.
Wow. Science became magic again!
You are the best
Dude, you rock
This is great!
You are awesome Alex, what material is best to make protective cap for these? Also is the electrical tape needed?
The tape is plenty to protect them and yes it is needed. You can 3D print a cover if you like. Just be sure it is thin. The length of the elements changes with the amount of material surrounding the elements.
WE BE CRAZY..... cuz we all Love this stuff. Time to use the 100s of Rubber Duckies collected over the years.
Parabéns pelo vídeo show de bola
Mr. Crazy, is it possible to convert a whip antenna like the ones used on Frsky receivers with the IPEX connector to a VTX antenna without a sleeved dipole or counterpoise? I tried it with quarter and half wave length and it seemed to work. I only used 25mw power cuz I was afraid of burning out my VTX. Thanks and hope you get your patent and it makes you money.
Awesome .. nice
It's like a homemade Ion
That's exactly what it is!
@@CAGreve1231 Noticed when I crushed/crashed my Ion....I was really surprised the lobes were not attached. Showed my fpv buddy and we both scratched our head asked "..is it really that simple?" Started using the Duraspec since we found some bando's.
@@audiogek simple looking? sure. simple to perfect like we have, not so much. and might I suggest a minion pro, theyre much stronger than the generations before them
^This. Simple looking, but very complex in the workings. We have banged our heads on the desks many times trying to figure out what isn't working with these from time to time.
@@vanguard6937 That's what I meant ✌️. I think you guys are geniuses.
Thanks!
Awesome thanks!!
Thanks for the video Alex, amazing as everything else you do... just a little question... at some point you mentioned that left and right hand polarization is given by which tip (top or bottom) points where... saying, this example is RHCP because the bottom tip goes to the right... I'm guessing that me and many others got it wrong for many years then... looking the antenna straight up (SMA pointing down let's say) I always thought that RHCP was because the TOP part is aiming to the right, not the bottom, does it make sense? Anyway, many thanks for your generosity and hard work! Ordering a few more of your antennas right now! :D
Maybe this explains it a bit better:
RHCP -> \
LHCP -> /
Ok, so it is a terrible graphic, but I hope it explains it better. The shell in the video is RHCP.
@@CAGreve1231 clear as water... Thanks so much for the explanation master ALEX! looks like many people had it wrong... just checked many websites, and they're exactly the opposite: RHCP: / LHCP: \
For a connected antenna, yes. Parasitic radiators work on induction where the current is reversed. This is a parasitic radiator so it will work as the reverse of every other antenna.
@@CAGreve1231 WOW... great! I almost had a heart attack, thanks Alex! :D Keep rockin'!
So if I understand correctly, this is how the Lumenier AXII works. Right?
Good videos - I am looking for the best indoor (or external) antenna to improve my Wifi / broadband signal collection. In the UK I’m using a THREE network SIM card on the 1800MHz (Band 3) (nearest); 2100MHz (Band 1) (nearest); & 800MHz (Band 20) system. Whilst, the tower is only 500meters away from me there are a row of trees & a row of two floor houses about a third of the way between my house & the tower. I am only getting two bars (from 5) reception that usually translates to about 2Mb download (1Mb upload) speed. Any thoughts on a solution and do you sell them to the UK?
This sounds like a good time for a BiQuad antenna. I do have the parts to make one for this application. I can send them to you if you want or build it for you.
skyhammer might be the best antenna for 5.8 known to mankind.
Now he tell us.
Can this be used on 2.4 wifi antennas? What would be the meassurements then?
It certainly can! You would need a 2.25-2.5" diameter former (It doesn't have to be round. Square works fine). Each wire element would be tilted 40-50 degrees and the length would be 1.52" +/-.05".
aint this design older? I swear I saw you presenting this before :O or a deja vu
It is based off of the ideas of the VAS switchblade and the tech of the ion
why do you not use a metall 3d printer to make antennas?
The accuracy stinks and they are very expensive.
What would the specs be for a 2.5Ghz antenna?
2.4
So how does this compare to a real rhcp antenna in terms of vswr?
Pretty close. These usually hit a 1.3 assuming it was a decent one to begin with. The Switchblade in the video is tuned for the shell, so it is a bit better, but honestly a 1.3 is quite good for just about any antenna in FPV.
I tried numerous time to make the cap, but no luck😥
Being precise as mush as possible doesn't help, as well as changing materials. The antenna won't convert to circular polarized and stays linear. Confirmed with vna and empirical tests with live fpv feed.
Can you give any advice?
I used foam and neoprene as dielectric and copper wire, paper clips as lobes. One layer of tape only
I am admittedly not sure how you could verify it without a vector voltmeter, but I suspect the neoprene has something to do with the less than ideal results. I would consider cardboard as a potential solution. Alternatively, try shortening the wires by ~1/2mm. You would be surprised how sensitive this is.
You also might want to try and see where the element is located within the antenna to make sure the shell is in the right place.
@@CAGreve1231 I use logmag trace on vna and screw in lhcp antenna to one port and whip to another. I aim to make rhcp antenna so losses must be pretty high comparing to linear polarization before placing the cap. It looks to work as I think because when I change the whip to rhcp or another lhcp antenna it shows the results you expect.
Regarding the neoprene, I used it after the foam which should be nearly perfectly rf transparent. Thought the dielectric might be the issue but it isn't so.
Thank you for your advice!
@@CAGreve1231 When you say the right place, where is that in relation to the element? I checked my linear antennas and if I place the shell where you do, it would be above the element. On your micro switchblade it appears to be around the balun.
I recently bought 2 of your Ions for my goggles and will order antennas for the quads soon. I was just playing around with this as it looked fun.
@@Kevin.L_ - Ideally right over center of the element. I had these rubber duckies specialty made for this so they'd just snap on. However, you can just slide it over to where your element is.
Admittedly, you don't need to be perfect. So long as part of the element is covered it will work fine.
@@CAGreve1231 Thanks. I'll give that a go.
Would there much difference in performance between a Micro Switchblade and a Minion Pro for use on a quad? Numbers are similar.
Thanks Alex! The Chinese can’t steal your intellectual property if you put it out there for everyone to see… LOL
Thanks for the tips and tricks my friend!