Two omni at one AP

RouterOS Wireless Networking
1

Hello,

Can I connect two omni antennas to R52nH card as one for TX and other for RX at my AP (802.11g) like the image?

Will be it some improvement then one TX/RX antenna?

Thanks a lot

Jan
2xOmni.jpg

2

I wouldn’t.

I did and it didn’t work well.

Two vertical antennas, one above and one below works pretty well. Two beside each other don’t work well at all.

Above and below typically shows over 100% CCQ, beside each other shows around 50% ccq even when connected at 54 or 65mb moving tons of data, all single stream, dual chain config.

3

its better that you use a dual-pol omniantenna.

for ex. rfelements stationbox whit ubiquiti omniantenna works great.

4

Hello,

Thanks for your answers.

I have another question. I use one P2P link with RB711G-5HnD and Jirous Gentle box MIMO (JM-220) on both sides. It works very well. But I don’t understand the 2 chain setup. I have both chains set for tx/rx (I copy the setup for P2P link with two SXT’s at Mikrotik website). I read somewhere at the forum that Mikrotik card’s can’t send and receive (one chain) in the same time. When I set horizontal polarization (chain 0) for link from AP to station and vertical polarization (chain 1) for link from station to AP it will be a full duplex link or not?

I work with Miktorik hardware for about 10 years, but with MIMO few months.

Thanks a lot

Jan

5

It is still half duplex.

This is a good start if you want to know how 802.11n works.

http://en.wikipedia.org/wiki/IEEE_802.11n-2009

6

Just a sec how do u mean u tried one for TX one for RX on N-standart with one radio card

7

No.

I had both chains enabled on a tower AP, both antennas on the same vertical plane about 4 feet apart, large scale the same way off the shelf routers are configured.

Doesn’t work worth a crap.

Both chains with one antenna above the case, the other below works pretty well, although they will likely be swapped out for dual polarity later on.