Author Topic: 2.4hgz directional antenna build advice (Read 1101 times)

rick · « **on:** April 10, 2013, 01:17:33 PM »

Hi chaps
looking at acquiring a 2.4ghz directional antenna of some sort. Not for massinve long range bu for stronger medium range and interference capability.
1) Am I right in thinking that a directional would cope better for example with close/medium range when going around trees and buildings if the signal gets weakened/blocked a bit

2) What would you recommend. I'm happy to have a go at making one, a helical or something perhaps. I have made up some skew planars so would need circular polarisation.

All and any advice, build links gratefully received.

thanks

Cupid Stunt · « **Reply #1 on:** April 10, 2013, 01:42:20 PM »

Define "medium range"

rick · « **Reply #2 on:** April 10, 2013, 01:46:47 PM »

Let's say up to 2 miles for discussion sake.

Cupid Stunt · « **Reply #3 on:** April 10, 2013, 01:50:17 PM »

Then you won't need directional, you'll do fine with clover/skew combination, though direction or not I wouldn't be going through or around trees at 2 miles out and I probably wouldn't be that low either

For the best opf both worlds get an Eagle Tree "Eagle Eyes" ground station which has diversity and hook up two receivers, one with a helical, the other a skew

rick · « **Reply #4 on:** April 10, 2013, 02:03:07 PM »

ok, thanks CS. Just improving m ground station stuff to try and go a bit further, be a bit more adventurous and I like the idea of flying around things at closer range and maybe going further. So say a fly around a building like an old tin mine say and not losing signal as soon as I go behind something but maybe with 2.4 that's just going to happen as it can't penetrate well not even close up.

bigMouse · « **Reply #5 on:** April 12, 2013, 12:44:50 PM »

The chances are you will lose the signal behind buildings regardless of what freq you go for!
The old TV frequencies were even lower typ: 700~900mHz ish and you would lose those if the aerial was behind a wall...