i plan to connect 2 sites over a wireless link and don’t know exactly which antenna should I use to get the best result.
The distance between the sites is about 1km without any buildings, trees or other objects.
I will transfer large amounts of data over the link. The main goal is therefore to get the maximum transfer speed.
Which antenna is the best choice for this setup ?
Currently I prefer the SXT G-5HnD but is this sufficient to get full speed? Or is it better to take SEXTANT G-5HnD ?
I also see the SXT 5HPnD but this has no gbit …
at first - thanks for your reply (very interesting links).
It’s a private setup (outdoor-installation) and the regulations and laws in my country are very simmilar to germany because i am from Austria.
When i can reach the maximum throughput which is possbile by a SXT or SEXTANT (150Mbit - 200Mbit TCP) then is that enough for my needs.
The question is what is the best choice for my set up (1km clear LoS) ? SXT G-5HnD, SXT 5HPnD or SEXTANT G-5HnD.
Should the SXT G-5HnD suffice?
Currently I’m using two SXT G-5HnD on 400m distance. The TX-power lowered to 5dB to achieve -60-62dB TX/RX Signal on both ends. Real TCP-throughput is 135-140Mbit/sec with maximum latency 20ms at full load. Before I used two RB600a+r52Hn with Cyberbajt Gigaether Duo 19dB dual pol. panel antennas for same performance. I think SXT G-5HnD can perform same on 1km distance at 10-12dB output power.
For any link I would point out you need enough power to do the job.
Any of these radio’s will have enough power to do the task you want.
So the next step is to analyse your surroundings, you say no obstacles which is a very good start.
Do you know how much RF noise is apparent in the area?
The Sextant G 5 HPnD and QRT-5 seem to have the same base card inside them its the quality of the mount and the gain on the antenna that separates the two of them.
QRT-5 has a nice 23DBi Antenna while the Sextant G comes with an 18DBi antenna.
Again either will work fine over 1KM however you are looking for a high quality link to be able to maintain 200Mbps TCP across the link.
at the 3DB point the QRT-5 runs about 10.5 degrees as opposed to 16.5 for the Sextant G. Therefore if you have some possible interference off to the site it may be better to get the tighter angle and higher gain, if you are worried about a source of interference behind your site possibly a lower gain could help
As a side note the QRT-5 comes with a Level 4 license so you could use it as an AP on that very tight beam width.
The SXT-G (original one) had a 25 degree beamwidth and the new SAR2 model has a 90 degree beamwidth that dramatically increases the likelyhood of picking up interference from outside where your other site is.
Unless you need the extra gain or if you get severe weather in your location the Sextant G should give you great performance (expect 300 / 300 Mbps radio data rate and >90% CCQ), if not then you can look at clearer frequencies etc to ensure good quality link.
