Create an account
I'm Famous in St. Louis. - The Life and Thoughts of Zach
Mar. 24th, 2004
11:02 am -
I'm Famous in St. Louis.
Leave a comment
March 25th, 2004 08:00 pm (UTC)
The antennas we're using are openly marketted for 802.11b use. No one has told us we need a license.
The maximum power for 2.4GHz is much higher than the stock radios generate so there's a lot of headroom for adding gain before we hit the legal limits.
Our Omni's are 8dbB so they aren't "really high gain". There's gain but it isn't huge.
At one point our reading of the regs suggested that antennas were fine but amplifiers that weren't marketted as a single FCC approved package couldn't be used. So no homebrewing amplifiers.
The thing is that we really don't want to amplify our signal. We use the omni because we want good omni directional coverage and we need a little boost. But ultimately because this is point to multi-point mesh routing on a shared medium we want to use the minimum possible power that still gets the packet delivered reliably. That way we are keeping a minimum amount of the medium "busy" for any given packet and we reduce interference on nearby nodes that are not participating in a given packet transfer.