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Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Sat Jul 12, 2014 1:07 pm
by speaksandeep
Hello,
I was using RB433 with 2.4Ghz Grid antenna, now I have to use the same hardware in other location as p2p in 5Ghz,
Can I use same 2.4Ghz Antenna with RB433, for point to point 5Ghz link

Regards,

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 3:12 pm
by rextended
why is called 2.4GHz antenna and not dual band antenna?

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 3:52 pm
by speaksandeep
It is not dual band, Its 2.4Ghz Grid Anteena,

we want to use it for 5 Ghz p2p link

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 6:13 pm
by rextended
...It is not dual band...
With my question I have forced you to answer yourself...

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 7:02 pm
by jarda
Just to be clear: no. Use 5GHz antenna for that.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 7:08 pm
by rextended
Just to be clear: no. Use 5GHz antenna for that.
Why you are everytime so clear? :lol:

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 9:28 pm
by troy
FWIW, I had a tower climber do this on accident. The signal was was considerably lower than expected, but the link did work.

Electrically speaking, the antenna will work (it puts the appropriate load on the transmitter), but you will never get the performance you would otherwise expect to get, as it's not tuned for that frequency.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Mon Jul 14, 2014 11:26 pm
by jarda
Rextended : not so many times I would like.

Troy : utp is also wire but using it for ac high voltage is not recommended. Everyone has to count with others also, at least not to make unnecessary noise and deal with local regulations if any. Therefore my NO.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 12:52 am
by plisken
FWIW, I had a tower climber do this on accident. The signal was was considerably lower than expected, but the link did work.

Electrically speaking, the antenna will work (it puts the appropriate load on the transmitter), but you will never get the performance you would otherwise expect to get, as it's not tuned for that frequency.
If you do that this blow up your radio card.

SWR (standing wave ratio) is to high and that can blow up your radio card
And you have not the full performance from the antenna.
The antenna is built according to the frequency properties.Otherwise it does not work well

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 12:58 am
by speaksandeep
In that case, shall I use 2.4Ghz for my new p2p link as I want to use the existing infrastructure.

distance of the p2p links are 1 km and 2 km

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 8:14 am
by plisken
May i ask why 2.4 GHz?
I give you advice use 5 GHz Point to point links the results in better performance.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 9:31 am
by speaksandeep
I know that 5Ghz is best option, but I need to utilize my spare 2.4Ghz Grid Antennas.
In case of 5Ghz link, I have to procure new antennas,

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 9:50 am
by plisken
I also grids, I use this only for site survey.
No longer able to build point to point links.
The grids are old, there are better things available.
Goodluck

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 11:30 am
by CyberTod
@speaksandeep so many people told you this is not a good idea and you still insist on doing it.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 12:31 pm
by rextended
Let make his steps.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 6:27 pm
by troy
@Jarda, I never said I would recommend it, just that it would work (however poorly).

@plisken, you're right, the SWR is too high, but didn't not consider that this would damage the radio, was only thinking from a tuning aspect.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 6:33 pm
by jarda
I also didn't say that utp could not lead high voltage. We all know that it could, especially in the cases we don't want to ☺. Everyone has his destiny in his hands.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 7:58 pm
by rextended
eMro batmoK oT meoK...

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Tue Jul 15, 2014 8:30 pm
by MrBarakat
Sit i think understand ur Q if u want make ptp with 5.8 u must use Antenna 5.8 not 2.4
and u have 433RB just want xr5 card + Antenna 5.8 and every thing will be ok
my regards

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Wed Jul 16, 2014 5:52 pm
by 0ldman
I've got a lot of dual band cards on single band antennas.

The only thing I've been able to do with them is scan to see what the rx strength is from my other devices on the tower. In my experience they won't even connect.

If you really have to make use of antennas that you have rather than antennas that were made to do the job no one is going to stop you.

You also won't get much help from the forum when the link doesn't behave as you think it should.

Re: Connect 2.4Ghz Grid Antenna to 5Ghz RB433

Posted: Sun Jul 20, 2014 2:55 am
by Petzl
i have a 5 ubnt device connected to a 2.4 ghz rubber duck, still working after 8 years ... distance is 25 meters .... and on the other side a nanostation loco ....

now i know better and wil alway's use the better solution ... in that time 5 ghz rubberduck antenna's where not so common ...