w00t! 5dbi antenna really packs a punch!

w00t! 5dbi antenna really packs a punch!

Postby Eyecannon » Thu Sep 05, 2002 11:02 pm

Before we'd get around 30-35 AP's in about 2 hours... tonight with the fab-corp magmount we got 102 AP's in 1 hour! That's 6 times as good :D

/me wonders what a 12dbi omni would do...
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Postby ted » Fri Sep 06, 2002 4:34 am

This has been discussed before: 12 dB omni will have so "flat" pattern that ther results will vary:

You would likely find some new access points and miss a few others (which 5 dBi omni catches). This is because 12 dBi antenna's gain falls rapidly when the target is off the antenna's plane, and APs elevated too high may go undetected.
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Postby Thunderforge » Fri Sep 06, 2002 4:51 am

I borrowed a 10 dBi from work a while back and could not pick up an AP we had on the 3rd floor from the street, but I can pick it up with my 5dBi. I considered a nice 8dBi to kind of "middle-road" it, but the 5 dBi was much easier for mounting/concealment.
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Postby Thorn » Fri Sep 06, 2002 6:27 am

You guys might want to check the fourth post down on this thread: http://forums.netstumbler.com//showthread.php?s=&threadid=2973 I've posted a very rough and simplified idea of how changes in gain changes the pattern that an antenna will pick up. It's enough to give you the idea.
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Postby mentat » Fri Sep 06, 2002 6:42 am

Originally posted by Thunderforge
I borrowed a 10 dBi from work a while back and could not pick up an AP we had on the 3rd floor from the street, but I can pick it up with my 5dBi. I considered a nice 8dBi to kind of "middle-road" it, but the 5 dBi was much easier for mounting/concealment.


I have a 9 dBi and I think it's works pretty well. The concealment part is definitely true. It's huge compared to the 5 dBis that I have on the trunk. It probably wouldn't be as bad if I put in on the trunk too, just don't have the right cables right now. It's also killing my gas mileage. :)
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Postby Thunderforge » Fri Sep 06, 2002 6:47 am

Originally posted by mentat


It's also killing my gas mileage. :)


I don't think anything could kill my gas mileage, the vehicle does that on it's own. I'm just glad it actually breaks double digits (even if it is only barely)

I'll have to post pics of the vehicle setup once I get the cable runs done.
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Postby Eyecannon » Fri Sep 06, 2002 9:47 am

Originally posted by Thorn
You guys might want to check the fourth post down on this thread: http://forums.netstumbler.com//showthread.php?s=&threadid=2973 I've posted a very rough and simplified idea of how changes in gain changes the pattern that an antenna will pick up. It's enough to give you the idea.


ahhh I really like that drawing... I think I'll be happy with my 5dbi and cantennas for a while ;)
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