Community discussions

MUM Europe 2020
 
User avatar
acim
Member
Member
Topic Author
Posts: 424
Joined: Mon Sep 12, 2005 12:26 am
Location: Serbia
Contact:

Omni 12dBi vs grid 22dBi - both 5.8Ghz

Tue Jan 31, 2006 11:37 pm

I replaced Pacific Wireless grid antenna 5.8Ghz 22dBi with some black omni antenna which is supposed to be 12dB (as my supplier said), but I could see even better diagrams, something like 15-21dBi. Still, it works very badly and I have signal which is about 19dB weaker than with grid. I have signal with this omni arround -68 -69 and with grid it drops to -50. Is this normal? I used the same cable, so this is not anything else and omni antenna is brand new, no watter in cables and similar things. Any suggestions are welcome.
 
cibernet
Long time Member
Long time Member
Posts: 610
Joined: Fri Jan 28, 2005 7:22 pm
Location: Marcos Juárez, Córdoba, Argentina
Contact:

Re: Omni 12dBi vs grid 22dBi - both 5.8Ghz

Wed Feb 01, 2006 12:34 am

I replaced Pacific Wireless grid antenna 5.8Ghz 22dBi with some black omni antenna which is supposed to be 12dB (as my supplier said), but I could see even better diagrams, something like 15-21dBi. Still, it works very badly and I have signal which is about 19dB weaker than with grid. I have signal with this omni arround -68 -69 and with grid it drops to -50. Is this normal? I used the same cable, so this is not anything else and omni antenna is brand new, no watter in cables and similar things. Any suggestions are welcome.
:shock: Do you use the omni for a PtP link or PtmP... If you use for a PtP of course you will have much less signal, the omni if designed for PtmP it was 360º of radius but it have about 5º to 10º of aperture, and it have much less gain...

Regards..
José Ignacio Acosta
MikroTik Consultant IDAR0001
Mikronet

Movile: +54 9 3472-624722
Email/Msn: info[at]mikronet.com.ar
 
User avatar
acim
Member
Member
Topic Author
Posts: 424
Joined: Mon Sep 12, 2005 12:26 am
Location: Serbia
Contact:

Wed Feb 01, 2006 10:21 am

I use it for multipoint base, of course. I want to connect several links to it, short, 2-3km. This way worked with Hyperlink antenna in some other project. I had average signal of -65 in that case.
 
marecare
just joined
Posts: 4
Joined: Mon Jun 12, 2006 4:18 pm

Mon Jun 12, 2006 4:45 pm

well u must use somekind of quality antenna like Hiperlink and not that crap from Netiks

Sharane
 
MiruK
just joined
Posts: 12
Joined: Fri Dec 09, 2005 12:50 pm

Mon Jun 12, 2006 8:56 pm

what is the problem?? -68dB is very good signal
 
User avatar
djape
Member
Member
Posts: 469
Joined: Sat Nov 06, 2004 7:54 pm
Location: Serbia

Tue Jun 13, 2006 1:58 pm

well u must use somekind of quality antenna like Hiperlink and not that crap from Netiks

Sharane
:lol:
I drink like a pirate and smoke like a hippie...
 
User avatar
acim
Member
Member
Topic Author
Posts: 424
Joined: Mon Sep 12, 2005 12:26 am
Location: Serbia
Contact:

Tue Jun 13, 2006 3:28 pm

@marecare

Sharan ti tata :)

Sacu da vam iskljucim Internet brate, pa cemo posle da vidimo jos lepsu zajebanciju. Ja sam te bre naucio sta znaci sharan, ali sa'cu da te naucim i sta znaci tetreb :)

I prvo nauci engleski pa se javi :)

@djape

Jebacu ga ruzno :)

@all

Sorry for this non-English comment.

I had experience with 3 models of 5GHz omni antennas and conclusion is that you should use 5GHz omni just if it is completely necessary. The best one seems to be Hyperlink HG5812U-PRO, but still, this is far away from point to point link with grid antennas. Even worse thing is that this antenna is quite expensive.

Another one, quite good but cheaper antenna is Q-5100A. This is some small gray antenna, I don't know the manufacturer, probably Chinesse. It is declared for 5150-5250 MHz, but works quite fine up to 5.8GHz. It maybe gains few dB less than Hyperlink, but you can buy it for 65% of money you need for Hyperlink.

Finally, the small black antenna I mentioned when I started this thread is the worst of these three. This is some Chinesse antenna, but it seems that the same factory makes very good omni antennas for 2.4 band. This 2.4 omni antenna is white and much bigger than Hyperlink 15dB 2.4 and it gains few dB more than Hyperlink. That's all folks :)
Last edited by acim on Wed Jun 14, 2006 5:38 pm, edited 1 time in total.
 
User avatar
acim
Member
Member
Topic Author
Posts: 424
Joined: Mon Sep 12, 2005 12:26 am
Location: Serbia
Contact:

Tue Jun 13, 2006 3:33 pm

what is the problem?? -68dB is very good signal
This is 1-2km distance. I expected at worse -65, but more logical was to get something like -62 or -63.

Who is online

Users browsing this forum: arjanwixx and 26 guests