Point to point connection tl-wa5210g and antenna

[Fjallbacka]

Hi, I need to setup a point to point connection from one place to another (in a city) which is 3-4 km apart. I have never done this, but I think that this router will be suitable for this purpose.

I first thought of buying a 5,8ghz one (there is less interference from other routers) but then I read that the disadvantage of that range of frequency is that is less powerfull (in terms of interference from threes and buildings, and reachable lenght) so I think that the 2,4ghz will be better. Is this correct?

I have another place that I want to transmit the signal but it is way farther (about 25km, and other direction) so I thought that an antenna could do this job (the tp link one has a range of up to 52km says the webpage). And now my question is, can I use the router and the antenna to transmit signal at the same time in diferent positions? (the router pointed to the first place, and the antenna to the other)

 

[Emerald]

Do you have direct line of sight? (no buildings or trees)

 

[Fjallbacka]

Do you have direct line of sight? (no buildings or trees)

I am not really sure that I don't have any kind of interference.. I'm pretty sure that not from threes but there might be some buildings in the middle (not too high, about 10-20 meters) and perhaps just one or two being unlucky (the city is not really big)..

Edit: I misunderstood you, in line of sight no, I don't see any interference. But in between, there could be. That is what I said before

But the other one that I told you I wanted to place an antenna will have interference, in fact the city is in a "hole" about 5-10 meters below the other place I want to transmit would that be an impediment?

Edit: in order to be more precise, here is the altitude that I've measured in a kind of straight line from the two points. Exact distance between each other is 22,77 km (14,14 miles).
The image altitude is presented in metres

 

[Emerald]

the tl-wa5210g is an external network device. You will need two of these pointing at each other without anything in between.

Up to 15km(9.32mi) with Integrated Antenna.
Up to 50km(31.07mi), external high gain directional antenna required.

However, these devices are not made to work in an urban environment. 2.4GHz is a very common frequency and you would have a lot of interference from other device operating in the city.

I would look at a Ubiquiti PowerBeam™ ac, or at least talk to someone over there to get a better understanding of what you are up against.

https://www.ubnt.com/airmax/powerbeam-ac/

 

[bill001g]

Even if you had flat bare ground between you there is a issue called fresnel distance. It tends to be rather complex but generally with a connection like this the main concern is reflection of the signals from the ground and absorption of signal by the ground.

A rough calculation would put you at more than 75ft above ground on both ends. If there is anything in the path you must be 75ft above that but the exact height depends how close to the end points it is but if you have 20meter exactly at the mid point you are now getting close to 150ft on each end.

The cost of the towers if you are even allowed to install them will likely stop you.

The devices you want to use are similar but I don't know where you came up with that crappy device. I am sure tplink must sell newer models. That is a old 802.11g device.

I would look at engeinus or ubiquiti and get a 802.11n. Both manufactures sell equipment for under $100 each end that could go 14 miles.

Still I suspect the clear line of sight and the distance above ground is going to make the project not possible.

 

[Emerald]

^+1

I would say the altitude could really be a problem.

You would need to raise the device device high enough to be able to transmit a signal over the two 65m elevations so it will reach the other location.