Blade Antenna for 5 8GHz

[@toffeeroffles]

Awesome, thank you. Added to faves for my micro FPV project I have planned!

[@joshaas]

? the formula for calculating antenna length was given as "length in meters =300 / frequency in MHz", 300:5800:4=12,9 mm, wy 9,6mm thats for 7.8Ghz?

[@minkorrh]

Could you use that little metal sleeve trick to make sleeved dipoles for micro models? I know they're cheap but it's more fun to make stuff and learn.

[@hoggif]

I like your videos! Practical and the antenna types are not something covered over and over again already on other channels. Any tips on 5.8G circulary polarized to share? I'd love to see any videos about them that are not the clover leaf or skew planar type that are well covered on youtube. I think circular polarization may have quite some benifits for FPV.

[@Catalysis1144]

Thanks for sharing your knowledge and skills Andrew. Am trying to make these Antennas so can I use the semi rigid coax and solder directly to it instead of using tubing? or tubing is a must?

[@ljbennett1]

How come the blade is 9.6mm and the omni 13mm for 1/4 wave length is the blade right?

[@llangollenwales1578]

HI not knowing much about antennas .....could I build it at half wavelength and what would be the benefit ....would it draw in more signal ......also what are the measurements for 5.8 ghz antenna thanks .....jim

[@PaperGlazed]

Andrew, would you consider selling the antennas you make?

[@andrewmcneil]

There will be a new forum and shop coming very soon!

[@DownhillAllTheWay]

Very pretty, but how well does it work? You don't give any test results for your antennae, which makes me dubious about their efficacy.

[@ericmatteson7844]

Mike Collins You're not the only person to spot that little point. If you check all his videos and comments three 'things' jump out at you. 1. He seems to have the test equipment available when it comes to 'rubbishing' commercial products but never uses it on his own antennae. 2. People who have constructed his designs and fairly tested them are rarely impressed. 3. His constructions are available in his shop and expensive, too! Caveat emptor.

[@agentbertram4769]

He uses his test equipment on his own antennae in many videos. Try watching them.

[@hothubby8057]

. He does entire videos just on testing antennas so his build videos are short and to the point..so what you don't like it, go make your own channel. See how long it takes you to get +40000 subscribers...

[@MarkRose1337]

What is better blade or biquad?

[@andrewmcneil]

Biquad every time but I am biased as it is my personal favorite.

[@pauljohnson7538]

Could you please calculate the 1/4 wavelength measurement for 915 mghz for me I would like to try one of these on my telemetry radio

[@micharonen5693]

hello andrew can you share why choose 1/4 rather 1/2 wave length ?

[@mattabult]

How does this deal with cross polarisation? Or is it "the same" as CP antenna's (no cross polarisation)

[@MrDriveAndFlyRC]

Hey awesome video as well. I wish I had the talent to do this myself but I'm not quit there yet. I would love to test these out on my channel and review them for you. I can pay for international shipping if you still wanted me to test some out. Have a good night!

[@andrewmcneil]

PM me and I will get some sent out.

[@arfintr1522]

hey andrew, what do you use as that white outer coating once you've finished your antennas? I heard you say paint, is it any specific type?

[@darwinmounsey376]

Probly plasti dip

[@Hans_Ham]

what are the differences (in performance) between this one and the celtic knot?

[@andrewmcneil]

Hans Ham Hi Hans they have the same performance but they have different polarisation.

[@Hans_Ham]

andrew mcneil Than you, but what is the benefit of that? Less interference with others?With all respect on what you do, I advise you to give better explanation what the benefits and features are of the products you make. For example, you make the celtic knot, but you do not explain why and when people should use it above a 6-blade or other designs. Maybe a table with gains and usability on your website would be nice.

[@craigpalmer9196]

what is the software you use to get the signal strength?

[@andrewmcneil]

craig palmer vistumbler

[@jondavies450]

Hi Andrew, I see from the title this is a 5.8ghz antenna so how come a 1/4 wave length is only 9.6mm and not the normal approx 13mm ? Is there something about its shape or design that would change things ?

[@jondavies450]

No I didn't get an answer, I guess Andrew is a busy man.

[@stavros015]

The 5.8Ghz band ranges from 5845Mhz - 5725Mhz. Dipending the channel he chooses he properly tunne the antenna to the right channel plus the thickness of the wire, thats the only explanation i can get hence the different lengths. The wavelength is a result of λ=k(c/f)0.25 where λ=wavelength c=speed of light on vacume/air f=the frequency you wnat to build the antenna for 0.25 for λ/4 and k=0.75( i think) you can find it on a graph by getting the wavelength/wire diameter ratio first!

[@stavros015]

is because the thicknes of the wire!! thiner wires have bigger reactance and its much dificult for the muching resistance of the antenna to the transmiter/receiver for the maximum power transmision! Thicker wires have smaller reactance

[@mattkins99]

He used the same 9.6mm for cutting the tubing so that doesn't seem to make sense.... (C/5.8ghz)/4 = ~12.9 adding in the thickness of the sire to account for that (~.8mm) that still only brings this up to 10.4mm which is 2.5mm short.

[@shanekoehler5124]

can anyone explain what 1/4 wavelength means? are these really better than the standard duck bill antennas?

[@esaedvik]

+Shane Koehler Yes. A lot.

[@rct2]

Would 200mw be ok for a 4 blade?

[@esaedvik]

+rct2 Depends on what you need. Wattage isn't really that important.

[@mickeyduck1162]

Can this be used for 802.11ac WiFi?

[@andrewmcneil]

Yes

[@mickeyduck1162]

@@andrewmcneil Thank you very much for the confirmation. 😊