Well, if you want to penetrate trees, the lower frequencies do better. Wisps know 900 works better than 2.4 or 5GHz. I think that above 1GHz the leaves cause more attenuation.
Rich ----- Original Message ----- From: "Brian Rohrbacher" <[EMAIL PROTECTED]> To: "WISPA General List" <wireless@wispa.org> Sent: Saturday, October 01, 2005 9:46 PM Subject: Re: [WISPA] Leaves and SAP So is it leaves or sap. (I know, both.....) rcomroe wrote: >Just remember that the frequencies we use today were not used forever. In >WW2 they were using pretty low frequencies. During Vietnam 800MHz hadn't >been opened up yet. I don't believe that anecdotes about the effect of >leaves on Ghz frequencies learned from 30yrs ago or more are still valid. >But they may well have been true about the low frequencies in use at the >time. > >Rich >----- Original Message ----- >From: "Brian Rohrbacher" <[EMAIL PROTECTED]> >To: "WISPA General List" <wireless@wispa.org> >Sent: Saturday, October 01, 2005 8:43 PM >Subject: [WISPA] Leaves and SAP > > >A good friend of mine (ham guy) tells me that during....shoot I cant >remember....either WW2 or Vietnam that they used something to kill the >leaves but it did not improve signal for their radio communications. So >it was determined that it's the sap in the trees not the leaves that >kill the signal the most. Anyone got a link to something a little more >"scientific"? Oh ya, I do trust this guy. He knows his stuff....wrote >this book http://www.arrl.org/catalog/?item=8624 but I just want a 2nd >opinion. > >Brian > > -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/ -- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
