Dipole Antenna for 2 4 ghz Wifi

[@fnavroz]

Thanks for the Informative and practical video Andrew. So to share with you I tried making a similar antenna for my Smart switch which works on Wifi 2.4 GHz but could not succeed. The Range is still the same with or without the antenna. I used the same concept of 25 + 25 + 70 + 60 mm. 1) I have used two thin wires to connect to the PCB where the zig zag antenna is embeded on the PCB by scraping the green insulation a bit and soldering it 2) Next I connected a coaxial cable which is 6 inches long to these two thin wires and at the other end of the coaxial cable I have built the extended dipole antenna with the help of the same copper wire used within the cable. 3) I used an air conditioner copper pipe for wrapping it around the cable for 2.5 mm then making the loading coil after 25mm, then 70 mm of loading coil and then 60 mm of suspended copper strand. May be there is something I am missing somewhere, please advise.

[@HobkinBoi]

Perfect tutorial. Thank you! I made an antenna to improve the internet connection quality of a cheap tablet. It was already partially broken, so I thought if I really break it then it really wouldn't matter. But, it all went well.

[@albertlawson5460]

Spot on..!!! I'm a ham radio operator and you hit every point of building a good antenna for WiFi.

[@arned432]

I make one and use this on cheap wifi crap(simple dipole cost ~3-4 USD) that have problem with 1 wall(~5m to router), I get 15dBm from this and rock stable connection. Thank you for teach me how antenas work and how build them.

[@acestudioscouk-Ace-G0ACE]

Amazing the difference one more wing element makes. Great work Andrew, thanks.

[@timjachson1336]

Thanks for the tips, I made 2 of these and solder them to my NVG510 ATT Uverse router. The extra ant boosted the signal enough that I now have WIFI in my total home, and eliminated a WIFI extender.

[@RossPotts]

Nice. Looks like the one you made, though at the same.percentage, had a more stable graph. Looked like the alpha was a bit jumpy and yours was built like a workhorse. Sweet.

[@andrewmcneil]

Hi Ross I thought that myself but i did not want to call it. :-)

[@fleiteh]

I would definitely like to see some videos explaining some fundamentals on how different structures match certain radio wave lengths.

[@agentbertram4769]

Instructional / educational white board videos are always welcome Andrew. Your teaching skills are good. Use them.

[@abo3abid1]

Well done, Mr.McNeil I loved your Chromecast video (what brought me to your channel), and like this one too. The public needs more antenna design/implementation info. Subscribed already :-)

[@ministeriomundialliberando8403]

Thank you!! ThIs is not a fake, it works. I've modified some simple 2.4ghz antennas and I've gotten very good results.

[@ministeriomundialliberando8403]

It really works, I've done some modifications with good results.

[@GlennLittleford]

I'm using a pair of ESP32's as a wifi serial bridge to a rover. This looks like a good improvement over the supplied aerials, thanks.

[@MrJeffschefke]

Added this to a travail router I had stuck it out the top, vary nice 20-30% improvement over the internal antenna

[@mxracer6920]

hi! your antenna works great! i made one for my x5c.....increased my range very well! thanks for the post

[@joaomarson1249]

Thanks Andrew, just built antenna as per your tutorial...works fine..!!

[@andrewmcneil]

Good to know Joao

[@tracyrreed]

Why suffer the coil losses when a resonant antenna without the coil is only a few centimeters longer?

[@David-Masek]

Coil didn't means losses. Properly measured coil inductance creates delay and changes polarity of 2.4GHz wave and both sections of the antenna (2.5cm under and 6cm above the coil) transmitts the same polarity at the same time. This longer antenna means higher gain (more straight signal pattern). Ordinary short antennas can't transmitt as far, but they creates more spherical signal propagation pattern around the router instead.

[@mikewoods1288]

well said

[@johnbaas3117]

thank you Andrew I'm going to try this.

[@bioskahabinivous9906]

5:15 How do I know how many turns I need? Im planning to make a VHF balun to match the impedance, thanks

[@ramosel]

What factors am I missing? Speed of light 299,792,458 m/s divided by 2.4 GHz gives you a wavelength of .1249 m or 124.9mm. Wouldn't a 1/4wave be closer to 31.2mm? Is there some factor for propagation through air or diameter of wire or...?

[@athertop]

I am keen also to hear a response to this question from @andrew mcneil I just pulled apart a 2.4GHz whip antenna (dipole) from my RC transmitter and it was 26mm long with 26mm ground plane/shield, but as calculated 2.4GHz full wavelength is 125mm, so a quarter wave would work out as 31.25mm. So why 25-26mm on the dipole for 2.4GHz? I also pulled apart a 5dbi 2.4GHz antenna, and the design is almost identical to the antenna being built in this video, aside from the dimensions - mine has a 25mm ground plane, followed by 22mm straight, then the coil, then finally 56mm straight. I only get SWR readings of around 15 with all these antennas. Wondering if the lengths could be better to improve SWR

[@Bush_Fam]

Hello. Need some antenna help. Is there any way I can send some documentation on what I am trying to do.

[@lienmako2617]

hei, i just want to know what is d purpose of that rings like in the middle , or in short, the one that u soldered ? is it ok to make that kind of antenna with out that rings like?

[@DavidHager1]

What is the point of the metal thing you put over the tubing and soldered to the braiding?

[@andrewmcneil]

Its the ground plane.

[@DavidHager1]

andrew mcneil I have an antenna that solders directly on to the pcb of my router, the antennas or non removable, well not if your 3 years old. anyway should I add one of these to reflect unwanted interference from the inner components even though there is no ground wire? Also do I need to connect this antenna directly to my pcb since a wire leading it to the outside will act as an unwanted antenna? Here is a picture of it drive.google.com/file/d/0ByycBNIVqin8a2E0MXItUkFiN2M/edit?usp=sharing

[@joseangchoo5812]

Excellent tutorial. Is it possible to use the hot wire of the coax cable to make the antenna instead of making it with a separate copper wire and by the way the unit will be more robust .There will be only one solder joint connecting the braided wire to the ground plane...

[@travisw9071]

also i have found some conflictions on the loading coil. does the size diameter and number of turns really not matter?

[@Digitaltiger123]

I saw no change in my routers wfi range,it actually dropped a bit! I did it exactly as shown exactly same measurements!

[@CarlosFelipeRequiao]

Thanks for your tutorials!! Could we add another coil to the top of the antenna and another segment 3/4 wave to get a 2X 5/8?

[@thebeststooge]

I have seen them for sale on Amazon with three coils and equal space between each coil.

[@jadedsoul1]

Hi and thanks for taking the time out to teach us. iv got a T link card in my PC. trying to get a good signal to the guy who is 3 flats above me. at the moment im using a tv signal booster with the extended pigtail with a piece of wire. now that goes into the female hole in the tv booster. there is no metal touching the outer metal, so is not correct. i have a portable tv Arial, a V type. im getting a boosted and better signal. what would be the best way and proper way to get a internet wireless antenna connected to the tv booster. also is it worth doing. Im deffo getting a better singal 3 bars 52 mbs without the booster/amp im getting a bar and pages take ages to load. look forward to your answer. cheers again.

[@janleroux]

Very helpfull and informative. Thanks for making these videos and sharing your knowledge!

[@neail5466]

Hello can you please explain the loading coil? Any weblink will also help. Does the gain improvement can be done with the coil? And what is the limit I mean when the impedance will be so much that it won't be able to generate sufficient radiation! Thank you very much for this guide.

[@lydev8163]

I would definitely like to see some videos explaining some fundamentals

[@johnbaas3117]

hello, I'm trying to make a longer version of this antenna with two coils, like the Linksys 7dbi omni antenna, I'm modifying the standard antenna, can you give some directions on how to make it work. I've copied the measurements of the Linksys but I'm not sure if I have to put the thicker part in at the bottom where the thin wire connects to the extension.

[@andrewmcneil]

+John Baas Hi John you can make one as follows 1/4 ground tube (25mm) + 1/4 driven elemen (25mm)t+ coil + 1/4 driven element (25mm) + coil + driven element 60mm. so it looks like this: ====----////----////-------- Any longer and you have to start factoring in baluns.

[@johnbaas3117]

Hi Andrew, should the length of the coil be 70mm like in the video? and the ground tube is the standard tube at the bottom right?

[@andretisch]

How to make a antenna but 12dB and more?

[@rj540]

Excellent, What would 5.8ghz measurements be?

[@SotosAlex]

Very thorough video! I have a question though: What about really long antennas (like TP-LINK ANT2415) that house lots of this half wavelength dipoles? Do the manufacturers just repeat the same thing over and over again? Or is it something else? Please, shade some light on this issue!

[@joecox9958]

1/4 wavelength is not 25 but 31.25mm, could you explain? can you just use coax for the spring/inductor?

[@andrewmcneil]

A 1/4 wavelength is 31.25mm well I did not know that. But there again it has an inductor and if something is inductive then its electrical constant is shorter. Hell, what do I know?

[@irishguy200007]

It has to have an outer shield and inner core which means two connections to a router board etc, so how come I see people soldering one wire to the board. I understand this video because I expected the antenna to have two points of contact but I don't understand the router antennas with one grey wire comming from the antenna.

[@md.sabbirhossain4596]

I am speaking from Bangladesh.What materials are made in the WiFi Router Antenna, Please let me know

[@gordonreeder3451]

Very nice. Just what I needed. I need to add a better antenna to a TP-Link TL702 travel router and this antenna looks like it will do the trick. I'll take measurements and take pictures as I go along.

[@JansenduPlessis]

+1 For the fundamental videos

[@andrewmcneil]

hopefully as soon as I get time.

[@rh4009]

+1 also would like to understand the fundamentals. How to reverse engineer an antenna? Which frequency band is a given antenna tuned for?

[@OmarMajidi-c1l]

Hey ,how can i make a bigger one to cover a wider range

[@SteveWrightNZ]

It's "around the same" because it is the same. The loading coil has so much inductance that it effectively disconnects the top of the antenna.

[@nickdarling5557]

Hi Andrew, I know this is old. I was just wondering why the 1/4 wave is only 25mm?? 1/4 is 30.5 mm I tried this antenna using multiples of 25 and had bad results. i changed the bottom to 30.5mm and increased the size of the 3/4 part of the eliment with better results. Can you explain why many dipoles only use 25mm as a 1/4 wave? Thanks. Nick.

[@kavindugilshan]

kzbin.info/www/bejne/hKCnn5WkqJaWhtk

[@stevefox3763]

Is the loading coil necessary, what if size is not a concern? Can we just run a straight section instead of the coil or does it affect how the antenna works after the 1/4 sections? If not, is there any reason why a full wave dipole would not work?

[@davidjames9935]

It may have been better if you showed split screen of you actually removing the one antenna and installing the other. Also for reference it would have been informative and interesting to screw in a 3rd antenna which is a 1/2 wave dipole antenna (the short 50mm one) for comparison. I noticed you received one more AP signal with the 2nd antenna and the average # of active APs detected seemed higher than with the first antenna but that could be a "fluke".

[@irishguy200007]

If your not using an sma connector and are soldering it direct to the board, will you be soldering two wires? One for the central antenna and the second for the outer shield? I have watched loads of videos and they just solder one wire to the board

[@Calypso993]

why didnt you use the core of the coax as your active element?

[@mikeylt999]

Can you add more coils for more dbi?

[@michaelporter8289]

It would be a good idea to do a tutorial of the mathematics behind the calculations of making an aerial.

[@hotel-undinfoportalaschaff1798]

Thank you for this Tutorial. But there is one mystery left: WHAT is that "chewbin"...? "Chewin"..? Is it a part of a pen? At the one end it looks like metallic..? Thanks

[@eknaap8800]

@Hotel-und Infoportal Aschaffenburg: In his dialect he means: 'tubing'. ('Schlauch' in Deutsch).

[@anthonyalleyne8724]

I love your video. I have a2 questions. What is the material of the metal like tubing and what is the length of the metal like tubing??

[@DanielRowe]

Where on ebay do you get the SMA pig tails? Can't seem to find them, probably not searching the correct search terms.

[@andrewmcneil]

Ebay seller chinarf is a good place to start.

[@YorHighness]

Amazon is better.

[@matthewhall9692]

I had some electrical wire laying around but us must use thicker stuff because I couldn't just bend it around a bolt like u did so easily. What gauge wire are u using?

[@matthewhall9692]

So the length used on coil is 70-25 so 45mm correct? I am using about the same screw and gauge of copper you are using but im only getting like 2 turns just doesn't seem right.

[@matthewhall9692]

Nevermind i see the mistake i made. Make it 70mm from the 25mm mark. Great video by the way!

[@MedmiggleHorn]

Can you use normal tv cable instead of the lmr cable?

[@thomasb1337]

That would have major loss issues due to tv coax isn't made for microwaves.

[@prakashgp3160]

Hey, can I use two such antennas connected to two ends of a cable and use it to bypass large concrete wall, by placing antennas at each sides of the wall ? (as a medium for signal to pass through)

[@orangepickel2]

Yes you can however you should use rg8 cable which will have the lowest signal loss. This is what is called a "Passive Repeater". I have built several of these over the years in the marine VHF 168.0 . Works best using a Omni directional and directional. The U.S. Military has been using these for years. In your case a biquad aimed at the router and the Omni on the other side.

[@myown8934]

orangepickel2 can i use this for RC transmitter, thanks

[@DimitriPappas]

Great information thank you. Just confused about, why 25mm divisions when 1/4wave for 2.4GHz should be around 31mm ? 25mm seems to be for 6GHz

[@termite2691]

I was wondering the same but found reference to this in a previous comment: en.wikipedia.org/wiki/Velocity_factor

[@kavindugilshan]

Capacitive design kzbin.info/www/bejne/hKCnn5WkqJaWhtk

[@89oi]

I desire to make the "longest" bluetooth antenna that is still optimal. The bluetooth pcb antenna is a short squarewave shaped pattern. Should I cut off most of the antenna so that only a stub remains and then solder a wire to the stub to act as my antenna? I am building a bluetooth speaker and I would like to inlay copper wire into the wood that would act as the antenna. A 32mm length copper would not be aesthetically pleasing. Is it possible to use a longer wire without diminishing the antenna's sensitivity? What is the longest length wire that I can use?

[@Desertphile]

I love your antenna videos. Thank you.

[@andrewmcneil]

Thanks Desertphile much appreciated.

[@naafiabdulnaafi7476]

I heard that incresing lenght of antenna of 2.4 ghz should be 31mm or 27mm changing the lenth then this cause problem then y 5db antenna is longer

[@GurpreetSingh-eu7mr]

Can we use it on transmitter

[@MoRiWanna]

Will standard cable coax cable work well as a driven element for an antenna andrew? -Lo

[@andrewmcneil]

Yes it will. Just don't use it to connect the antenna to a card. Andrew

[@MoRiWanna]

Thank you andrew I do use caution as to ground myself at all times learned that and youre also right on directly soldering to the antenna it definatly had no affect on the gain of the antenna, so i will probably by the correct sma and test something a found on google I would have to disable the default antenna and solder ground and what I assume to be feeding the signal to the chipset as shown in one of your videos I will use caution thank you andrew for your awsome Makes and inspiration. -Lo

[@danosdotnl]

whats your video showing how to make a diy wifi dipole?

[@starchaser2489]

I want to do this Antenna mod on a 2.4g wireless camera, any idea as to what length the wire should be? The camera antenna wire is only 1" long now. Any help would be great. It's going in a R.C. glider. Should the mod be done on the receiver or the little antenna wire on the camera?

[@joco137]

Could this be used on the wifi jammer as well? to add range? Or is it pointless?

[@Ryuuken24]

Just made a similar antenna for my quadcopter that runs on the 2.4G band. The antenna that came with it was 27mm, I cut it down to 25mm, I don't know why but, I got way more interference because of Wifi signals around here. Also, there is a Celltower 500 meters, does that cause interference? I swear, every time I'm 15 meters up in the air, and I seem to lose control of whatever I'm flying.

[@bfelten1]

I don't get it. 1/4 wave length for 2.4GHz isn't 25mm as far as I know. And how does the 60+70 mm make up to 3/4 wave lenght?

[@Pompiduskus]

It is not real length of wave, there is something that slow down waves. So we need keep it in mine. C = SPEED-OF-LIGHT = 299792458.0 F = FREQ = 2.4Gz = 2400000.0 L = LENGTH = 1/4 K = 0.8; //

[@kardinalacc]

how I can find K constant, I have aluminium tube, what is K for Al?

[@Pompiduskus]

It depend of material, is it pure ALU, or ALU+ something else. Try to search for table with different materials and related K value to it.

[@Aluminata]

I have a discontinued Futaba radio control transmitter 2.4 ghz. I wonder if this might work - it is missing the antenna!

[@TheCladi8or]

Oh my . good work! Question...i have a drone( syma x5c) id like to extend the range by adding antenna (any type of wire i hope) to the transmitter. Its 2.4 ghz. Whats my best option for this? Add to existing antenna? How long wire to add? thank you!!

[@matthewbarnard461]

Useful video. Is the ground plane really necessary? Some antennas I have don't appear to have that big thick black pigtail like yours.

[@lorinrandall3508]

I'm all for the white board fundimentals Andrew.

[@arymascoo]

What a meter tool instaled to windows computer to see the performance of this job compare with industries generally have. I see in common 2.4 Ghz is 6 loop, and 5 GHz 4. What you have is 4 loop and work for 2.4 GHz. How can it be explained

[@fredrikh2003]

Amazing!! This actually works a bit to my Zodiac M8000 Thanks😉

[@fredrikh2003]

Or not, it just had a problem

[@bjornahh87]

is it possible to use this method to make a gsm antenna ?? and how long/short should the antenna be at fex: 1800mhz or 2100mhz ??

[@ther00kie16]

These videos are very helpful. However, I can't help noticing your wavelengths deviate from theory. For example, 2.4ghz would be 125mm for a whole wave, as opposed to the 100mm your diagram implies. Same goes for your 5ghz video. What accounts for the discrepancy? Also, would it be possible to design such an antenna with ~1cm gap such that it operates at both frequencies simultaneously as wiki claims gaps of

[@andrewmcneil]

Theory is only one part when designing antennas. I normally work on 126mm for a full wavelength, why because 126mm puts me in the middle (channel 6) of the 2.4ghz spectrum. Now for this kind of dipole in order for it to generate a radiate radiation at 2.4ghz the 1/4 wavelength needs to be 25mm or 26mm depending on where you want to be on the spectrum. This is because the design is different to most dipoles most dipoles look like a letter T on its side but this dipole is inside each other and so effects the wavelength. Hope i explained this ok as it is hard without diagrams. Now as for a duel functioning dipole there is no such thing in the microwave spectrum.What you will have is a good 2.4ghz antenna and a poor 5ghz antenna. manufactures of duel band cards will ship with one 2.4ghz antenna and tell you it will work on 5ghz and it will just not very well. It is a way to save money.

[@ther00kie16]

andrew mcneil I'm guessing internal antennas of this variety have completely different physics then? static3.wikia.nocookie.net/__cb20100916024419/infodepot/images/2/22/Belkin_F7D4301_v1.0_FCC1u.jpg And I'd want to create separate antennas for each band (b=2.4ghz, w=5ghz)

[@bbowling4979]

+andrew mcneil " but this dipole is inside each other and so effects the wavelength. " At what point does the inner conductor get connected to the outer shield in order to make this a folded dipole? From what I can tell the two are completely isolated and this looks like a monopole. Please help me understand. Thank you.

[@josjakoornneef6810]

Hi Andrew, I want to try to build this antenna for 1.2ghz. Do you mind helping me with the dimension or better with formulas to calculate the dimension of the antenna for other frequencies? I think this will help me and other users alot!

[@lorinrandall3508]

Question Andrew? What gauge wire would you suggest, 20?

[@marcnh33]

what is the thickness of the copperwire ???

[@eknaap8800]

@maRCnh33: The thickness isn't that important due to the 'skin-effect' of the high frequencies. It is more the practical side; not too thin to break and not too thick you have trouble bending it.

[@jessecrockett]

Awesome. I'd love to see how much tolerance a "wifi gun" has, how much it matters to be precise, from metal disc to antenna, powered lines -- for the newb who doesn't know he can do something more. Thanks.

[@eneoroberto]

Dimensão da bobina é (0.95x299792458) / 2x2441000000 , ou seja, o fator de velocidade do condutor x a velocidade da luz e tudo isso dividido por duas veles a frequencia desejada. Duas vezes porque esse calculo é para uma antena de meia onda.

[@andrewmcneil]

Esta é uma antena dipolo Hertziana, não uma antena dipolo, um dipolo Hertziano é muito indutivo, então tem uma fórmula diferente de um dipolo tradicional

[@DigiLit]

can I replace router dipole with biquad? any modification for router if I do that? my router is tl-841n. thanks

[@andrewmcneil]

+Virtual Visa Cards You would have to open it up and modify it by adding bulkhead SMA connectors should be easy to do with this router.

[@DigiLit]

thanks Andrew for your answer, I will do the SMA connector, however the resistant of Biquad is 0 and dipole is infinity (no connection between center and ground) does te biquad create any short circuit problem?

[@andrewmcneil]

+Virtual Visa Cards Yes the biquad is a short circuit closed loop design but it is not the same as an electrical short circuit. it will be fine but remember it is directional.

[@DigiLit]

Thank you for helping me understand, I will follow your guide to DIY my double bi-quad.

[@jamesxdreyes5051]

+Virtual Visa Cards what's your wifi ? i don't know the materials needed can you help me .. my wifi is globe tattoo

[@michalkabat5383]

Hi it is posible to extend this antena from 5dBi to higher values i.e. 5, 10, 15 dBi?

[@andrewmcneil]

Hi yes it is, if you you stack 1/4 wavelengths with coils in-between

[@matthewhall9692]

Also I have two male SMA ports on the back of my pc coming off the motherboard. It came with a dual band wifi antenna but it got ripped off. I was hoping I could make these and increase the length of the pig tails so I can find an optimal place to mount the antenna. I'm assuming one sma port is for 2.4ghz and other for 5ghz?

[@da4270000]

a full wave or larger I would like to learn about besides just length if you even have time think you

[@fotoamgamgfoto3695]

Is it for transmitter only?

[@TicTac-g7m]

FotoAmg AmgFoto Both...

[@joestubbs3138]

So can I use this antenna on my Taranis DSMX Module Hack or any 2.4 Tx - would there be an increase in range and does it effect the Tx's RF module output ( dBm/mW ) and therefore battery drain, marginally though it maybe - also Q's Q's sorry would this be termed a centre load aerial/antenna...joe

[@peterzingler6221]

Battery draw is t same only thing that changes is t dbi score ...but a 5dbi antenna is about 5 bucks

[@ralph9987]

Brilliant video. I would love to see the maths for this antenna for VHF marine at 156.8MHz. I want to build a vertical that has a bit more gain than a dipole at 2.15db. can you please help me?

[@lindagiovannazambanini6218]

Maybe i missed it...but which ALFA dipole antenna are you comparing it too? The 5dbi or the 9dbi? Great video btw...using the screw to make the turns is brilliant! :) Thanks...

[@anthonyalleyne8724]

And what dbi is your finished antenna??

[@goneflin]

Could you share specs for constructing a 465 Mhz collinear walkie talkie antenna , 5db gain with a bnc connector?

[@mohamedyahya2064]

Hello dear ,im from Tunisia ,can you dear helpe me to make an antenne for detector metal , withe my plleasure

[@vorkev1]

HAVEING A LOADING COIL ACTULY GIVES BETTER RECEPTION OR I SHOULD SAY IT GIVES BETTER SIGNEL

[@angelomartins5647]

WHY IS 1/4 Wavelenght of 2.4GHz equal to 25mmmm ??? ... shopuldn't it be a quarter wavelenght of the WiFi band (I'll consider 2.4GHz) the value bellow of 31,25 mm ? Sorry my ignorance in antenas.. the wavelenght is C/f 300000000/2400000000 = 125mm for a full wave therefore a quarter sould be 125/4 = 31,25 mm GREAT TUTORIAL BY THE WAY. CONGRATS!!!

[@tracyrreed]

Read up on velocity factor. You can't just use the speed of light in a vacuum. The speed at which an electrical signal travels is something like a copper wire is somewhat less than the speed of light. en.wikipedia.org/wiki/Velocity_factor

[@tracyrreed]

The velocity factor for LMR-400 (not sure that's the exact cable he is using but close) is .85 so 31.25*.85=26.56mm which is pretty close to 25mm.

[@simonsullivan8344]

Will this antenna improve Bluetooth performance? my Bluetooth headphones die after ~ 10 metres

[@rj540]

Could you make a 9dbi 5.8ghz dipole? what would the measurements be?

[@wensz1]

is 1 mm in diameter copper wire good?

[@markcorden]

Hi Andrew, I am looking to build some Radio Control 2.4GHz dipole antenna and need a UK source of the ground plane shields as per your video, any info on where to buy them would be appreciated

[@shawnperry2500]

Very nice informative video. I am very interested in you doing some white board videos with the fundamentals. This is a topic that I feel could benefit me greatly, as I install satellite systems for video and internet. Great to have an easy DIY solution to resolve wifi coverage issues.

[@jm-hb4zc]

thank you for sharing your knowledge Andrew , i'me currently trying to find the best antenna for my gate motor 330 mhz can't find anything on the web do you have any ideas ?..... regards john ..Australia

[@clancyimislund5783]

No 50 ohm impedance?

[@jbush4203]

Can you point me to an equation to calculate the antenna lengths? I am interested in instruction on antenna theory - short course. Really appreciate your videos!

[@IAMTubeJones]

Paul Jones For addition; In the SHUNT the ground plane must be the sme length as the antenna and in phase.

[@IAMTubeJones]

Paul Jones For us not so smart guys in the States (??) that never learned the metric system.... www.manuelsweb.com/in_cm.htm

[@andrewmcneil]

Paul Jones I was half way through school when we went metric in the UK. So I measure using metric but estimate using imperial. So how messed up is that!

[@IAMTubeJones]

@Andrew; The length of antenna is the length of the wave. Use multiples or division. 1 full wave, 1/2 wave, 1/4 wave, 2 full wave. etc. In. wide spectrum get to know the center frequency and floor. The center will be "Q" and "ceiling" and "floor" " should be where losses occur. Good primers are written for HAM, TV and CB radio en mass. (popularity with truckers)

[@IAMTubeJones]

IMHO folks; This video is well presented and to the point.

[@shanetillery254]

Is that 14-2 house wire or 12-2?