Antenna with gain over 10dbi for 868Mhz and 750Mhz

[antenna_kid 14]

Looking for ideas for two antennas  with gain ove 10 dbi - one for 868 Mhz and second one for 750Mhz.

Any suggestions ?

[Admin 2578]

Hello buddy...!!! are you interested in it being smaller?

[antenna_kid 14]

If it will be smaller then it will be additional good feature

[antenna_kid 14]

this design looks interesting:

[Admin 2578]

,,,who did the simulation and where is the feed point...???

[antenna_kid 14]

Found it some time ago. Feed point is on side of the middle element.
This is also for 2.4 ghz wersion

24 patch.webp

Edited January 24 by antenna_kid

[Admin 2578]

It's a bit complicated though,,,,!!!!

 

[antenna_kid 14]

I have small cnc and spare PCB blanks so it's doable.

 

[antenna_kid 14]

it looks like patch with parasitic element, and looks like easy tu manufacture because there are just only 3 round elements.

[Admin 2578]

,,,it's simpler that way...and it's broadband (0.75---0.865)MHz....

[antenna_kid 14]

 Any dimensions for that proposal ?

Generally dont looking for broadbang. At this moment looking for two antennas with higher gain:
One for 700MHZ and second for 750mhz. Easy to manufacture on CNC from FR4 laminate.
 

[Makesh 0]

Дать чертежи 

[Admin 2578]

9 hours ago, Makesh said:

Дать чертежи 

 

[clanon 258]

Could be made to ANY frequency , Circular pol (could be made lineal easy) efficiency could be better NOT using FR...

[clanon 258]

[clanon 258]

Easily 12 dbi at 725 mhz

[antenna_kid 14]

Thanks, but looks like has quite big footprint. 
this one i've provided is quite small - 200mm diameter. Generally i could sacriface those 10 dbi over smaller footprint.
Clanon. So such design but linear and for 750 ?

Can someone also simulate Yagi on FR4 for 750 ?

 

[clanon 258]

Easier ,for me, if  YOU choose ANY 2-3 patches design (10dbi)  ( need a frontal picture)

and then we'll make it work at 725mhz...

[antenna_kid 14]

On 27.02.2024 at 0:53 PM, clanon said:

Easier ,for me, if  YOU choose ANY 2-3 patches design (10dbi)  ( need a frontal picture)

and then we'll make it work at 725mhz...

As in begining. 
still interested in this design. 
Looks compact as for 915. For 750 will be biggeer but can still accept that. 

Eventually, if you have calculations for PCB Yagi antenna for such frequency  
I want to test aslo FR4 Yagi but for 868 and 915Mhz.

[Admin 2578]

,,,but this...

,,, is different from this one...

 

,,,where did you get the pictures from?

[antenna_kid 14]

the first one is for 2.4 ghz.

 

[Admin 2578]

antenna_kid,,,if you have any drawings, I would need more sizes...!!!

[antenna_kid 14]

Searched forum, and this looks like this Yagi antennas. But made form FR4 laminate.
THis is just example, picture took form other topic. AS I see this version is for 2.4
 

Edited March 12 by antenna_kid

[clanon 258]

FR4 have lots of disadvantages (efficiency at RX lost , losses at TX a lot ! , never know the Tangent loss and dielectric constant for each material , fr wouldn't be on POINT ever ) you'll need an antenna analyzer or vna to be on frequency PS: only "advantage" size is smaller than metal on air

[Admin 2578]

I think it is best to make a Bester antenna for the desired frequencies....