Sleeve Monopole Antenna 2 4 GHZ and 1800 MHz to 2 5 GHz

[@eIektrinis]

this looks nice for 4G LTE - covers the frequencies nicely.

[@urbanimage]

This series of videos with antennas suitable for LTE are very interesting.

[@RuthRhoten]

Does this LTE antenna help to access antenna built behind new condos across the street from my shop. I had get access with my iPhone before these condos were built. Now dropped calls and very poor reception. I understand how to build your antennas but do not understand how to connect to iPhone. I understand a booster is required. Which antenna would be best? I really enjoy your channel. Thank you

[@stevemacbr]

Definitely one for the next build. - Thanks for the PDF. (already downloaded ) .

[@andrewmcneil]

Have fun!

[@jafinch78]

Neat seeing the performance and construct. I've only messed with disassembly of the sleeve monopole to use the connector for the spiral conical antenna once. Your design is really heavy duty. Neat seeing... and now I'm thinking I'll have to try the NanoVNA and tinySA to see what the performance is like since your test bench is really neat to view. Getting close to the snowy filth transition from outdoor to indoor projects. Thanks for sharing!

[@jafinch78]

Wondering what the simple monopole for 2.5GHz you have compared on the spectrum analyzer... will have on the bucket list. Especially, with the discone monopole maybe making a telescoping sleeve to adjust with the telescoping monopole. Seems appropriate having the telescoping yagi design too.

[@jafinch78]

Wondering how can roll a sleeve to be telescopic and expanding and contracting reliably. Kind of overthinking... though dunno.

[@joeleonard4515]

Brilliant video, is there a reference for the maths to calculate the dimensions?

[@microwave-vh2uc]

The length of the feeding cable is going to effect the return loss

[@garyweliver1870]

Very simple build that really looks worth building, Thx

[@andrewmcneil]

No problem 👍

[@martinbirrell57]

What would the pipe lengths be for a fullwave 915mhz antenna be. This is for a LoRaWAN gateway in Australia

[@jafinch78]

I was wondering about the relationship being linear or some other regression relationship also.

[@todoxe]

Hello, what is the material of these tubes? can I use aluminum tubes? Thank you

[@robertpretty397]

Nice design. How would you calculate the lengths. Used 143/fmhz the length are longer on the 1/2 element... thanks

[@eIektrinis]

can you use a piece of coax instead of tubes?

[@eIektrinis]

found it. You can.

[@darrenhague6669]

Very interesting video Andrew but i am a little confused as to what is being used as the ground plane of the antenna. If you connect a given length of coax ... test .... then change the coax length and test again, does the resonance of the antenna change due to differing earth lengths ?. I am judging this in comparison with a 1/4 vertical with 3 or 4 1/4 wave earths to act as the other half of the antenna.

[@andrewmcneil]

The ground plane is beneath your feet

[@krzysztofswitkowski5364]

Without the ground plane, VSWR is terrible. As only receiving antenna may be acceptable. (but with real wifi application the transmitting is important). You comparison overestimates the performance difference. It would help if you compared with something similar. Commercial sleeve dipole antenna - i.e. rubber ducky - which is also sleeve antenna (with similar far filed pattern). The monopole probably is underperforming due to the lack of the ground plane. Also, the sleeves are quite long here. The bottom is like lambda/2. The top sleeve is close to lambda/4. From my experience adding a heat shrink tubes, puts to the antenna more capacitance and shortens dimensions. In your case effect is opposite. I assume that you found the lengths by test and trials using VNA and you made the second copy during filming. I would avoid inner tube shrink and use only some kind of stopper/cap to hold the inner tube. In this case, someone without VNA if only uses different kind/vendor of heat shrink tube (i.e., not black with glue version to avoid a mess) will end up with a slightly detuned antenna. It will become more severe if someone would try to scale your dimensions to 5 GHz..

[@andrewmcneil]

@@krzysztofswitkowski5364 LOL its a monopole the ground is earth

[@krzysztofswitkowski5364]

In such antennas, the ground plane sheet of metal is a mirror plane and for matching impedance due to capacitive coupling. The earth ground as a conductive plane concept will work for long wavelengths - long antennas/ ham radio etc. not UHF antennas. For UHF bands, the idea of perfect conductor close to the pole, only works as a mirror plane. Antenna only slightly feels the earth ground. You can put UHF antenna vertically or horizontally and you will notice minor changes in radiation pattern and impedance. I also watched your ceiling antenna video from the past. I noticed that there is a ground plane. Moreover, the outer sleeve is not connected to the ground plane. Ceiling antenna looks like ground plane monopole with tricky resonator as the driven element. Why did you come up with the idea of shorting the outer with the inner tube? In an antenna often you have to short but in some distance (part of lambda) for matching impedance. (i.e J-pole). If you would not show Vistubler results, I could assume that you made RF 50 Ohm resistor in the 2.4 GHz band.

[@krzysztofswitkowski5364]

Sorry I missed the part, Now I see that you also put insulator disc between the connector and sleeves, It's DC Open and it might work.

[@oscar3611]

How on earth did the bandwidth get so wide?! That's very interesting. I'm experimenting for months with antenna builds to find the (theoretical non-existed) optimal "all-band" antenna for my RTL-SDR. This video of a sleeved monopole gave me some hope and inspiration to experiment with the sizes, trying to make it as broadband as possible, so I can receive FM broadcast, DAB+, 400+MHz en stops at est. 1GHz. My dongle doens'tgo higher anyway.

[@darrenhague6669]

If i was you i would look into the Discone Antenna as this would cover most of what you are wanting. Mount the thing as high as possible with minimal coax length and you should be good to go with a SDR receiver. Hope this helps.

[@TuttleScott]

since its rtlsdr, put it with the antenna and use a usb cable with a booster.

[@oscar3611]

@@darrenhague6669 The discone was the first one I tried. I don't like the gain (none) and I very much dislike the size. But the internet tells me that is the only one to have. Trying and testing is also a hobby, so I don't mind playing with different designs.

[@oscar3611]

@@TuttleScott I already did that. Weird enough I get better results with an rf amplifier at the antenna, and the dongle at the other end of the coax. Seems unlogical, but I guess the dongle is a bit deaf without help. But still, I am trying to find the perfect antenna voor SDR.

[@bengone1]

Any chance you could sort out the measurements for a 1080MHz ADS-B aircraft tracking antenna?

[@samsami1130]

thanks a lot for this video dear, i wonder if we can make the wider band antenna a 9db ?

[@DAVIDGREGORYKERR]

What about using LDF4-50A Corrugated Coax which is quite ridgid.

[@BrunoSouza-cf7xq]

Middle tube needs to be hollow?

[@prometheus4130]

Curious as to the theory, tried making this and got a not ideal outcome...would like to investigate where I might have gone wrong. Any pointers?

[@SimonShaws]

Very nice, kind of reminds me of a J pole but with the longer arm sitting inside the short arm.

[@krzysztofswitkowski5364]

I think it is so-called "Sperrtopf antenna". Sleeve version of the J pole.

[@mbielchris]

How does it compare to a dipole antenna? And when would you choose a sleeved mono vs a dipole?

[@carlocastelli7511]

Hi Andrew, sorry for my question which does not refer to this topic, I would like to boost the signal of a Bluetooth tx slightly, I have about 15-16 dBm you can give me some model of 2.4GHz amp from 23-25 dBm to put in series ? Thanks.

[@garabedfakrajian5149]

Hello andrew Can a 3mm rod be used instead of the 3mm tubing?

[@bobmick4984]

would love to see more 4g lte antenna and could you start selling them yours look like they i tried to get some on ebay but no luck goten 4 from ebay none beat my router antennas

[@davidvanson1786]

Is there any antenna i could make from copper tape on the inside of my phone case to increase the 4G signal my poor phone struggles with indoors?.

[@TuttleScott]

not likely

[@andrewmcneil]

No

[@markspc1]

Amazing antenna.

[@Bazrrrr]

I'm just about to make two of these for a cantenna wifi bridge. I'm using 2mm and 6mm copper tubing, so the dimensions you've specified will still work with the 2mm diameter as I'm using that instead of a 3mm?

[@andrewmcneil]

Yep

[@Bazrrrr]

@@andrewmcneil excellent many thanks for the quick reply.

[@MrYevelnad]

can these be use for fg lte?

[@khalifamohsin7]

Hi sir I see all of ur video thank you for all this video Sir can you show me haw u calculat the length of sleeve monopole Please help me with it thank you

[@fevzisantur6467]

Hello Sir, is it possible to make same antenna for 5.8ghz? What will be measurements? Thanks.

[@andrewmcneil]

It is posable but have not worked out the measurements yet

[@brainforce3428]

Hi. Sir kindly recomend antenna for remote areas like here in the philippines. I want to build one for my gsm and wifi but I cant decide what to build.. Our service provider uses 3G, H+ and LTE. We have poor signal in our place. Thank you for your answer sir.. I really love watching your videos.. :)

[@SimonShaws]

LTE Discovery app will tell you frequency you are using. For fixed installation a Yagi would be best, pointed at the tower.

[@beansfoundhere]

Great video as always Andrew. I want to make some of these to go on my LTE router! But it has TS9s so that will be fun lol.. I remember you saying something in the past about a video on stacking Dipoles for gain, and would love to see one that includes some wideband properties like this. Do you think it's wideband properties will effect the SNR of LTE signals due to all the noise it's picking up on crowded 2.4Ghz?

[@stephenstebbing9460]

Is there a know relationship between dBm and percent? Thanks. I always enjoy your videos.

[@djtahir7752]

Good job sir ...