yagi 2.4Ghz yagi

[eddyann 3]

1 hour ago, Admin said:

,,,you work with CST...???

I'm currently learning to draw and simulate disc antenna using CST software. Still new and learning. I still cannot find the formula to get the feed point / inset feed location. Some said it is about ~1/3 from the V or the radiator

[superolo 0]

On 25.01.2021 at 8:47 AM, Admin said:

,,,these are the real dimensions...

How much does the material of the antenna matter in this design? For example the difference between copper and steel or aluminum.

Edited May 21, 2023 by superolo

[Admin 2545]

h0 = 2mm

,,, the material for the antenna does not matter, but it must be able to be welded...!!!

[superolo 0]

1 hour ago, Admin said:

h0 = 2mm

,,, the material for the antenna does not matter, but it must be able to be welded...!!!

Thanks!!

[Admin 2545]

,,,a modification to Bester antenna...

,,,and even better...with truncated vibrator...!!!

 

[EvgenijK 0]

Hello. Who has the correct drawing with dimensions for bdm 2400 mimo and 75 ohm cable?

[Admin 2545]

On 5/22/2023 at 8:56 PM, EvgenijK said:

Hello. Who has the correct drawing with dimensions for bdm 2400 mimo and 75 ohm cable?

 

[papus 0]

i made one and it works really well ! What happens if the antenna is out in the rain? Will the water cause a short circuit and potentially damage my adapter (which I keep indoors) ? Or will it just not work properly ?

[Admin 2545]

,,,papus... if the antenna is out in the rain, you have to protect the antenna with a plastic case...

 

,,,or so...

 

 

[papus 0]

Beautiful ! Will do that

Thanks for sharing all this valuable information ! It is of great help

Edited September 12, 2023 by papus

[DavidER 2]

Which 2400 antenna with 75 ohm cable is suitable for a modem?

https://jekolo.com/jekolo1/product/zte-universal-portable-4g-lte-wifi-mifi-modem-mf920vs/

[Admin 2545]

75 ohm cable (for TV only), not for wireless(modem,antennas,etc) use...!!!

[DavidER 2]

1 hour ago, Admin said:

Кабель 75 Ом (только для телевизора), не для беспроводного использования (модемов, антенн и т. д.).!!!

Which one then? 50 ohm?

[Admin 2545]

Of course !!!

[ALecNET3993 1]

Hey i went through this entire thread. Can someone explain if the 15mm rim around the reflector really necessary for the antenna to work properly? Because I have seen a few people omit it while simulating 

[Admin 2545]

,,,hi buddy...!!!

The border has an influence on the directivity of the antenna.

[ALecNET3993 1]

Thanks for replying, this thread has been really helpful for me. But I one really dumb doubt about the coax connection.

The green wire  in the JoMy pic supposed to represent the braid or dielectric?

My initial guess was dielectric because the braid extending beyond the reflector felt wrong, but then i saw one of the photos your uploaded where the braid extends beyond the reflector till it is just 2mm away from the vibrator.

Again, sorry if this was a really dumb question.

[Admin 2545]

>>>this might help you somehow...!!!

 

[ALecNET3993 1]

YOO I BUILD THE ANTENNA AND IT WORKED. THANKYOU SM!!!

This is slightly off topic but could you link me to some resources or books thought which i could learn how you guys are able to come up with the dimensions for this type of disc yagi antennas? Is it just trial and error or do you use any equations? 

 

[clanon 246]

10 hours ago, ALecNET3993 said:

 

This is slightly off topic but could you link me to some resources or books thought which i could learn how you guys are able to come up with the dimensions for this type of disc yagi antennas? Is it just trial and error or do you use any equations? 

 

https://www.vinoth.org/rf-calculators/circular-patch-antenna-calculator

 

trial and error but several curves for director reflectors are well known ...NEED to run several SIMULATIONS , tho

Edited November 6 by clanon