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Re: Any directional antennas recommendations?




On Saturday, November 24, 2018 4:28:01 PM -03 Alexander V. Makartsev wrote:
> On 24.11.2018 3:41, Hubert Hauser wrote:
> > Hello!
> > 
> > I need to connect to a distant Wi-Fi network. I consider buying a
> > parabolic antenna. I want to have 10 km range and long amplification.
> > Will TP-Link TL-ANT2424B be a good aerial?
> > 
> > --
> > 
> > Best wishes,
> > Hubert.
> 
> According to specifications of the TL-ANT2424B you should be getting
> around 30Mbps. [1]
> Of course, you have to install antennas on both sides, as Doug already
> suggested, to make them "talk" in both directions and also make sure
> there are minimal possible obstructions between them, especially
> concrete or wooden buildings, trees, high voltage power lines, etc.

And don't just think of line-of-sight but also take the Fresnel-Zone* into 
account because every dB counts. You might want to install WiMax, which is 
designed to cover distances of up to 50km instead of being bent on WiFi. Using 
high-gain directional antennas makes your installation illegal in most 
countries unless you are a licensed radio amateur. But even then you need to 
stay within the assigned frequenies for amateur radio and you are not allowed 
to encrypt.

[*] https://en.wikipedia.org/wiki/Fresnel_zone

> You have to mount them on a poles long enough to compensate for horizon
> curvature and direct them at each other to get maximum possible signal
> strength.
> Also keep in mind that this setup will be prone to weather conditions
> like rain, snow, wind and could temporally make signal strength worse.
> 
> [1]
> https://www.tp-link.com/us/products/details/cat-5067_TL-ANT2424B.html#specif
> ications

-- 
Eike Lantzsch ZP6CGE