NetStumbler.org Forums - View Single Post - Point-to-multipoint basic questions

number9 · 09-16-2004

I know that the "Yagi or Parabolic" question has been asked dozens of times, indeed, I've just read 20 threads in the archives on this particular topic! However, I can't actually find a thread that will answer my question, so...

I want to do a point-to-multipoint network, for some low-speed low-traffic data connections (see my other thread asking for advice). I'll use an Omni antenna at the base, but for the clients I can't decide what to use.

I realise that Parabolics usually offer higher gains, but narrower beamwidth (I think?) and thus make for much more difficult pointing. And likewise I realise that Yagis usually offer slightly less gain, but are easier to point. BTW, if I'm wrong about either of this, someone please correct me

The nodes will be around ~3km away from each other, I'm gonna use Senao 100mW bridges on each side. My wifi supplier has stock of 12dB(i) omnis and 19dB(i) parabolics, but I'm not sure if that's overkill? I certainly don't want to be polluting the airwaves, making it harder for other people to use their own connections.

Oh yeah, and I can't even decide between 802.11b and 802.11g

09-16-2004	#6 (permalink)
number9 Registered Member Join Date: Jul 2004 Location: Bamako, Mali Posts: 10	Yagi or Parabolic with P-to-MP? I know that the "Yagi or Parabolic" question has been asked dozens of times, indeed, I've just read 20 threads in the archives on this particular topic! However, I can't actually find a thread that will answer my question, so... I want to do a point-to-multipoint network, for some low-speed low-traffic data connections (see my other thread asking for advice). I'll use an Omni antenna at the base, but for the clients I can't decide what to use. I realise that Parabolics usually offer higher gains, but narrower beamwidth (I think?) and thus make for much more difficult pointing. And likewise I realise that Yagis usually offer slightly less gain, but are easier to point. BTW, if I'm wrong about either of this, someone please correct me The nodes will be around ~3km away from each other, I'm gonna use Senao 100mW bridges on each side. My wifi supplier has stock of 12dB(i) omnis and 19dB(i) parabolics, but I'm not sure if that's overkill? I certainly don't want to be polluting the airwaves, making it harder for other people to use their own connections. Oh yeah, and I can't even decide between 802.11b and 802.11g