2.4 in 10 MHz channels goes through a decent amount of trees within 1-2 miles max, if all the CPEs are nanobridge m5-25 dishes or similar sized reflectors...
I've seen such setups with clients in trees and signals right around -69 on both chains. Not a lot of aggregate capacity per sector however. On Feb 17, 2016 2:13 PM, "Sean Heskett" <[email protected]> wrote: > I've never had any luck with 2.4 going through much more than the side of > an aspen tree. > > can you set up some 900 test shots? > > On Wed, Feb 17, 2016 at 3:09 PM, Rory Conaway <[email protected]> > wrote: > >> So given this scenario, would 2.4GHz be better? I can use 5GHz inside >> the houses. >> >> >> >> Rory >> >> >> >> *From:* Af [mailto:[email protected]] *On Behalf Of *Chuck McCown >> *Sent:* Wednesday, February 17, 2016 2:57 PM >> *To:* [email protected] >> *Subject:* Re: [AFMUG] Cambium 450i 900Mhz >> >> >> >> I have not measured one, but if someone has a pine tree nearby and an ohm >> meter, measure the resistance of the needle. Make sure you jam the probe >> into the interior of the thing. >> >> >> >> I am guessing that the water content of the needle absorbs some of the RF >> energy al la a microwave oven. But anecdotal evidence over the past 10-15 >> years has shown that pine trees are worse than others so if the needle >> itself has a fairly low resistance, like 100 ohms, it is acting like a >> dipole with a termination resistor. That is really going to suck up the >> signal. >> >> >> >> Stealth aircraft have microwave absorbing foam on some of their surfaces >> that operate by similar principles. >> >> >> >> *From:* Sean Heskett <[email protected]> >> >> *Sent:* Wednesday, February 17, 2016 2:13 PM >> >> *To:* [email protected] >> >> *Subject:* Re: [AFMUG] Cambium 450i 900Mhz >> >> >> >> the wavelength of 900Mhz is ~33.3cm so a quarter wave length is ~8.33cm >> (~3 1/4 inch). Ponderosa pine needles (and many other pine needles) are >> around the same 3 1/4 inch length >> https://en.wikipedia.org/wiki/Pinus_ponderosa >> >> >> >> so with water in the needles you have a big 900Mhz RF >> scattering/reflector ;-) >> >> >> >> -Sean >> >> >> >> >> >> On Wed, Feb 17, 2016 at 1:47 PM, Sam Lambie <[email protected]> wrote: >> >> So if you have a minute to please explain how evergreen trees are >> terrible on 900 mhz, I would greatly appreciate it. >> >> >> >> On Wed, Feb 17, 2016 at 1:14 PM, Chuck McCown <[email protected]> wrote: >> >> Ponderosa? Fir? Cedar? >> >> >> >> The length of the needles matter. >> >> >> >> *From:* Rory Conaway <[email protected]> >> >> *Sent:* Wednesday, February 17, 2016 12:51 PM >> >> *To:* [email protected] >> >> *Subject:* [AFMUG] Cambium 450i 900Mhz >> >> >> >> Realistically, what kind of distances do you get through these types of >> trees? >> >> >> >> >> >> *Rory Conaway **• Triad Wireless •** CEO* >> >> *4226 S. 37th Street • Phoenix • AZ 85040* >> >> *602-426-0542 <602-426-0542>* >> >> *[email protected] <[email protected]>* >> >> *www.triadwireless.net <http://www.triadwireless.net/>* >> >> >> >> “The ultimate measure of a man is not where he stands in moments of >> comfort or convenience, but where he stands at times of challenge or >> controversy” – Martin Luther King >> >> >> >> >> >> >> -- >> >> -- >> *Sam Lambie* >> Taosnet Wireless Tech. >> 575-758-7598 Office >> www.Taosnet.com <http://www.newmex.com> >> >> >> > >
