antenna yagi 4g 1800

[Edel2020 15]

Hello friends, I found this antenna on my friend's channel https://www.youtube.com/@mul_onochannel1569, I would like someone to model this antenna to know how effective it is and if it could be optimized, it will also work with rods and a reflector. mesh? It is supposed to be for the 1800 mhz frequency.

[Admin 2426]

,,,the youtube channel is not working...!!!

[eco32 21]

3 hours ago, Admin said:

,,,the youtube channel is not working...!!!

https://www.youtube.com/@mul_onochannel1569/videos

[Admin 2426]

,,,yes, Mul_ono Chanel is the user "miloudsatdz" on this forum...!!!

[miloudsatdz 17]

On 01/12/2023 at 10:30 AM, Admin said:

,,,yes, Mul_ono Chanel is the user "miloudsatdz" on this forum...!!!

No its not my channel youtube 

[Admin 2426]

,,,sorry for the wrong information...!!!

[miloudsatdz 17]

3 hours ago, Admin said:

,,,sorry for the wrong information...!!!

no problem 

[clanon 215]

 

[clanon 215]

 

[Edel2020 15]

I see that in Asia it is very common to use antennas without impedance adapters and that they give good results, how is this possible?

[eco32 21]

20 hours ago, Edel2020 said:

I see that in Asia it is very common to use antennas without impedance adapters and that they give good results, how is this possible?

Only few types of the antennas dont need a impedance adapters. The others will have a high loss. Do they have good results without this? The results will be adequate for the price.

[Edel2020 15]

How much loss will the published model have?

[Edel2020 15]

Yes I know, it should be like that, but sometimes they surprise me, is this the case?

[Edel2020 15]

I could have a balance like that, simple and practical

[eco32 21]

On 4.12.2023 at 10:09 PM, Edel2020 said:

I could have a balance like that, simple and practical

thats how it is made:

 

[Admin 2426]

,,,this construction is a bit wrong, mcNeill doesn't really do good things...!!!

,,,on this forum there is such a dipole in the correct construction...!!!!

 

[Edel2020 15]

Thank you very much, Discarded Project

[clanon 215]

On 4/12/2023 at 4:43 PM, Edel2020 said:

How much loss will the published model have?

a Ratio between antenna Impedance and radio impedance the bigger the difference bigger the losses...let's sat 300 ohm antena/ 75 ohm radio 4:1 VSWR = close to 40% reflected power on TX...on RX it's gonna be WORSE...(small signal)

[clanon 215]

Correct adaptation from 50 ohms to 300 ohms antenna  (Quarter wave long should take velocity factor of Coax in length ) 0.66 PET , etc

[eco32 21]

On 6.12.2023 at 10:30 AM, Admin said:

 

@Admin

{,,,this construction is a bit wrong, mcNeill doesn't really do good things...!!!}

McNeil, He performs titanic antsy work in making phantoms, but do not fully understand it, for example, phase shifters are called load coil, and so on and so on...

 

{,,,on this forum there is such a dipole in the correct construction...!!!!}

HAMs do not know it, I have not yet seen any HAMs construction with the use of this type of matcher/balun. Most popular is this one:

This is material for a separate topic, LTE/Wifi antennas rarely have a balun.

 

[Edel2020 15]

So guys, what would the balum be like for this antenna?

 

[clanon 215]

On 23/12/2023 at 9:00 PM, eco32 said:

@Admin

{,,,this construction is a bit wrong, mcNeill doesn't really do good things...!!!}

McNeil, He performs titanic antsy work in making phantoms, but do not fully understand it, for example, phase shifters are called load coil, and so on and so on...

 

{,,,on this forum there is such a dipole in the correct construction...!!!!}

HAMs do not know it, I have not yet seen any HAMs construction with the use of this type of matcher/balun. Most popular is this one:

This is material for a separate topic, LTE/Wifi antennas rarely have a balun.

 

4:1 balun (50 ohms to 200 ohms , 75 ohm to 300 ohms , etc)