w00t! 5dbi antenna really packs a punch!

Eyecannon · 09-06-2002

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

/me wonders what a 12dbi omni would do...

ted · 09-06-2002

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.

Thunderforge · 09-06-2002

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.

Thorn · 09-06-2002

You guys might want to check the fourth post down on this thread: http://forums.netstumbler.com//showt...&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.

mentat · 09-06-2002

Quote:

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.

Thunderforge · 09-06-2002

Quote:

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.

Eyecannon · 09-06-2002

Quote:

Originally posted by Thorn
You guys might want to check the fourth post down on this thread: http://forums.netstumbler.com//showt...&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

09-06-2002	#1 (permalink)
Eyecannon Ward River Join Date: Aug 2002 Location: Santa Monix Posts: 679	w00t! 5dbi antenna really packs a punch! 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 /me wonders what a 12dbi omni would do... __________________ No, officer, YOU are under arrest! http://eyecannon.com/wardrive.html

09-06-2002	#3 (permalink)
Thunderforge Registered Member Join Date: Jun 2002 Location: Florida Posts: 342	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. __________________ Back to the forge, TF

09-06-2002	#4 (permalink)
Thorn Did you do the math? Join Date: Apr 2002 Location: Villa Straylight Posts: 10,096	You guys might want to check the fourth post down on this thread: http://forums.netstumbler.com//showt...&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. __________________ Thorn "I'm The Doctor. I'm a Time Lord. I am from the planet Gallifrey in the constellation Kasterborous. I'm 903 years old and I am the man who is going to save your lives and all 6 billion people on the planet below... You got a problem with that?"

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09-06-2002	#2 (permalink)
ted Stumbling on Join Date: Aug 2002 Location: Houston,TX Posts: 47	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.