2.4 & 5.8 GHz WIFI antenna can be devided?

[AmateurRadist 6]

Hi!

I had 2.4Ghz & 5-5.8GHz 14dbi panel antenna, I'm wondering if i want to have signle band antenna like only for 2.4Ghz and only 5.8GHz antenna - can i cut somewhere in middle and still have good vswr? Antenna made of galvanized steel, here is the drawings of it?

I tried to cut right next to the soldering pin and assembled antenna but vswr was around 1.8-2.2 while factory vswr is 1.3-1.5

any help is appreciated

thanks

[Admin 2545]

Hello, it would be good if you could post some dimensions for this dual band antenna...!!!!

[AmateurRadist 6]

here is the dxf file https://disk.yandex.ru/d/HBfm2j3BfYz5qA

spacers are made of plastic, bottom 4mm, top 8mm 

[Admin 2545]

It would be easier for me if you put some dimensions...!!!

 

[AmateurRadist 6]

10 minutes ago, Admin said:

It would be easier for me if you put some dimensions...!!!

have you seen dxf it's correct dimensions

[Admin 2545]

,, you can put the dimensions on the dxf drawing..!!

[AmateurRadist 6]

23 minutes ago, Admin said:

It would be easier for me if you put some dimensions...!!!

 

I tried both options vswr still high, i placed feed1 a bit higher, to upper square though, it was originally designed with N type connector but i replaced it with cable, should it effect? i will try check sizes and send 

Edited October 23 by AmateurRadist

[Admin 2545]

I can help you if you don't give me the dimensions,..!!

[AmateurRadist 6]

Most interesting part is that original factory antenna's vswr showing sometimes good vswr, sometimes bad depending on analyzer-antenna cable jumper's position, like if i bend it's good, i'm using jdsu celladvisor

[AmateurRadist 6]

16 hours ago, Admin said:

I can help you if you don't give me the dimensions,..!!

okay i will get dimensions asap

[Admin 2545]

,,,your antenna doesn't really give good results...

[AmateurRadist 6]

26 minutes ago, Admin said:

,,,your antenna doesn't really give good results...

Vswr is good why you think it is not good?

I cut right next to solder pin and it showed good results like peak 1.8 at 2.3-2.5ghz with a good cable, but 5.8 didn't work yet

[AmateurRadist 6]

I tried like this but still fail

[Admin 2545]

,,,the adaptation lines are not good...!!!

[AmateurRadist 6]

Which limes?

[AmateurRadist 6]

You mean lines connecting elements?

[Admin 2545]

[AmateurRadist 6]

I have at top corners, small square, can you help with that and check on simulation software?

[Admin 2545]

,,,you have the possibility of laser cutting...???

[AmateurRadist 6]

5 hours ago, AmateurRadist said:

Vswr 

1 hour ago, Admin said:

,,,you have the possibility of laser cutting...???

Yes it become just ordinary service recently,  can you give some advices how to change lines?

[AmateurRadist 6]

After 10 failed attempts I think deviding was not good idea, so friends just use antenna as it is, hope above information will be useful to someone thanks

[clanon 246]

[clanon 246]

2 hours ago, AmateurRadist said:

After 10 failed attempts I think deviding was not good idea, so friends just use antenna as it is, hope above information will be useful to someone thanks

The final impedance resonance vswr s11 , have the WHOLE as target...imho

[AmateurRadist 6]

@clanon thanks yes with that filter added vswr was good, is there a filter for 5.8 too? To make 5.8 at least workable 

[clanon 246]

Think of each Patch as Resistances , since you have 4 patches for 5.8 and two patches for 2.4...(and YOU NEED to end up on 50 ohms) cutting in a half doesn't work for ALL patches...Filters add complexity (BUT adapt impedances to EACH BAND)