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I'd like to install a wireless ip camera near the back of my property. It will be several hundred feet into some woods. I plan on using some large directional antennas to help me get the range I need. Is 5ghz or 2.4ghz better at penetrating the trees and leaves?

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Trying to catch an image of Slenderman? You might looking at directional wifi antennae, as you don't need a large area covered. –  SaintWacko Sep 14 '12 at 17:00
    
Can you put an antenna up high in one of the trees? There may be less stuff blocking the signal path up there. –  martineau Sep 14 '12 at 17:49
    
This is a possibility I'm looking at. –  Cody C Sep 14 '12 at 17:52
    
According to my neighbors, the longer the wavelength the more penetrating. ;) –  Louis Apr 13 '13 at 23:58
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4 Answers

Typically, higher frequencies have better penetration through solid objects, but have shorter range than lower frequencies.

I would suggest getting devices that support both, so that you can play with the settings.

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I think you've got this backwards based on WhoIsRich's answer and what everything else I've read. I wasn't sure if it was exactly the same for trees/leaves though so that is why I asked. –  Cody C Sep 14 '12 at 17:41
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No it is correct, do some googling and you will see. –  Keltari Sep 14 '12 at 17:46
    
I did, and everything says lower frequencies penetrate better. –  Cody C Sep 14 '12 at 17:51
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@Keltari - Can you provide any evidence. I agree with CodyC that lower frequencies penetrate better en.wikipedia.org/wiki/IEEE_802.11 & en.wikipedia.org/wiki/Line-of-sight_propagation –  ooo Sep 14 '12 at 22:05
    
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Several hundred feet sounds a bit far and demanding (really depending on how the actual location is, how much foliage, etc.).

I'd go with a dual band solution, but 5 GHz 2.4 GHz would most likely offer the more stable connection. If possible, you might get even better results using some repeater inbetween, but it's really hard to guess not knowing what's the location like (some small house in the garden or woods, door entrance, etc.). In general however, I'd suggest you use a camera with a cable (maybe even combined with a WiFi bridge to cover some problematic area (like a road or river) if possible.

Also keep in mind that directional antennas aren't allowed to be used everywhere. If in doubt, check with your local authorities.

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How is the camera getting power? If it is mains, you may want to look at buying a pair of 'Ethernet over powerline' adapters. They are cheap, allow you to use your mains wiring like a network cable, and I have found them to be a lot more reliable than wifi.

I believe that lower frequencies have better range and ability to get passed obstacles. From my own experience of having a dual band router, the 2.4ghz has a far better range than the 5ghz signal.

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This is what I would do. Easiest solution and makes transmission through the trees a moot point. –  Lee Harrison Sep 14 '12 at 16:56
    
You might have trouble with signals getting back with just battery power and trees in the way. If there is no direct line of sight, you may be able to go up, and get both antennas above the tree line. –  WhoIsRich Sep 14 '12 at 17:58
    
@CodyC if you're unable to get wifi working over that distance ethernet over coaxial boxes are available with more than sufficient range for your application. For ex StarTech EOC110R adapters with a 2.4km range can be found for ~$125 each (selected via google search, I've never used them). There're less expensive adapters available intended for running a network over existing coax runs; but I couldn't find max cable length data for them. –  Dan Neely Sep 14 '12 at 20:56
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The lower the frequency the better the penetration (Ignoring super high frequencies like X-RAY). Thus a 2.4 gig connection will be better then a 5 gig connection - although neither will be particularly good. If you don't need a lot of bandwidth, try something on 900 MHZ or even lower if you can get the gear.

(An extreme example, I believe submarines use extremely low frequencies for communication. This limits there bandwidth, but gives them a large range through water. Whales do the same thing).

If you are trying to use "off-the-shelf" 2.4 gig gear, look into gear with MIMO (multiple antennas). The trees are going to provide a lot of reflections, and using MIMO gear you may be able to filter some of it out - although a lot of it will be absorbed - particularly by the water content in the trees.

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