Chuck, Yes, that is right, it is the radiation characteristics that are specified, that must be met.
My point being "size" is not one of the criteria listed required to be met. Tom DeReggi RapidDSL & Wireless, Inc IntAirNet- Fixed Wireless Broadband ----- Original Message ----- From: "Chuck McCown - 3" <[EMAIL PROTECTED]> To: "WISPA General List" <[email protected]> Sent: Thursday, July 10, 2008 1:26 PM Subject: Re: [WISPA] Dragonwave antenna pattern for RM > Generally speaking, when the FCC specifies antennas they are more > interested > in the pattern than the gain. Specifically, they have a beamwidth and > sidelobe suppression mask that they insist upon. This is always true with > satellite uplink dishes. Not totally familiar with the point to point > fixed > microwave requirements but I would suspect this to be the case there as > well. For parabolic reflectors, gain=directivity*efficiency or > directivity > (beamwidth) = gain/efficiency. Most parabolics are about 50-60% > efficient. > So you can treat that as a constant. > ----- Original Message ----- > From: "Tom DeReggi" <[EMAIL PROTECTED]> > To: "WISPA General List" <[email protected]> > Sent: Thursday, July 10, 2008 12:29 PM > Subject: Re: [WISPA] Dragonwave antenna pattern for RM > > >>A couple notes... >> >> Because this is a Dragonwave thread, I'd recommend that you contact >> CharlesWu at cticonnect.com, I've been very pleased with his assistance >> in >> the past on Licensed. >> >> As for 11ghz dish size... The requirements are not size, it is gain >> characteristics of the dish. In most cases only a 4 ft dish demonstrated >> those characteristics. >> There is a 2.5ft dish on the market that DOES meet the requirements to be >> equivellent of a typical 4ft dish. If you need this 2.5ft dish, it will >> also effect your selection of gear, as some manufactyurers require use of >> a >> specific dish, based on the mounting and waveguide methods to be >> compatible. >> Take note that it is now legal to use smaller dishes, based on recent >> lobbying and FCC decission, but it is on a secondary basis that gives >> priority to the users of larger 4ft dishes. If you deploy smaller than >> the >> 2.5ft full spec'd dish, you should fully inform your self with exactly >> what >> that means, as far as rights you have under the license. >> >> With that said, we have been very pleased with our Trango 18Ghz Licensed >> gear. They are shipping 11Ghz stuff now also, and definately worth a >> look, >> if you have not yet made a purchasing decission. >> >> Tom DeReggi >> RapidDSL & Wireless, Inc >> IntAirNet- Fixed Wireless Broadband >> >> >> ----- Original Message ----- >> From: "Jonathan Auer" <[EMAIL PROTECTED]> >> To: "WISPA General List" <[email protected]> >> Sent: Thursday, July 10, 2008 11:46 AM >> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >> >> >>>I did not know that. >>> Can anyone suggest a good FAQ/Intro resource for someone just getting >>> into licensed backhauls? Or a collection of links so I can RTFM? >>> >>> On Thu, Jul 10, 2008 at 11:35 AM, Brad Belton <[EMAIL PROTECTED]> wrote: >>>> Doesn't 11Ghz have a 4' minimum or was that changed? >>>> >>>> Last rumor I heard was you might be able to get a 3' or possibly even a >>>> 2' >>>> approved for 11GHz, but if it becomes a problem then you'll be forced >>>> to >>>> change to an antenna that doesn't cause a problem with a tighter >>>> pattern...like 4'. >>>> >>>> Best, >>>> >>>> >>>> Brad >>>> >>>> >>>> >>>> -----Original Message----- >>>> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On >>>> Behalf Of [EMAIL PROTECTED] >>>> Sent: Thursday, July 10, 2008 11:26 AM >>>> To: WISPA General List >>>> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >>>> >>>> Regs are 6' minimum high performance dish at 6 GHz unless something >>>> changed >>>> recently. >>>> >>>> At 11 Ghz you should be able to get 99.99 and use the 5 Ghz to back it >>>> up >>>> Sent from my Verizon Wireless BlackBerry >>>> >>>> -----Original Message----- >>>> From: "Jonathan Auer" <[EMAIL PROTECTED]> >>>> >>>> Date: Thu, 10 Jul 2008 11:17:07 >>>> To: WISPA General List<[email protected]> >>>> Subject: Re: [WISPA] Dragonwave antenna pattern for RM >>>> >>>> >>>> Not really. The biggest I can use are 3' >>>> >>>> On Thu, Jul 10, 2008 at 11:14 AM, <[EMAIL PROTECTED]> wrote: >>>>> Do you have facilities to mount 6' antennas at any real height?? >>>>> >>>>> You may be able to get away with 11 GHz... >>>>> >>>>> Bob >>>>> Sent from my Verizon Wireless BlackBerry >>>>> >>>>> -----Original Message----- >>>>> From: "Jonathan Auer" <[EMAIL PROTECTED]> >>>>> >>>>> Date: Thu, 10 Jul 2008 10:57:06 >>>>> To: WISPA General List<[email protected]> >>>>> Subject: [WISPA] Dragonwave antenna pattern for RM >>>>> >>>>> >>>>> Does anyone have a Radio Mobile antenna pattern for the Dragonwave >>>>> Horizon Compact? >>>>> Is there a better tool/method for figuring out if the 6+Ghz licensed >>>>> freqs are appropriate for a link? >>>>> >>>>> I could be barking up the wrong tree with this... Are the higher freq >>>>> licensed links appropriate for ~15-25 mile links? >>>>> At the moment I'm using PTP600s and AN-50es to do the job but I can't >>>>> get the speed I'd like because of noise floor. >>>>> >>>>> >>>>> >>> >>> >>> -------------------------------------------------------------------------------- >>> WISPA Wants You! Join today! >>> http://signup.wispa.org/ >>> -------------------------------------------------------------------------------- >>> >>> WISPA Wireless List: [email protected] >>> >>> Subscribe/Unsubscribe: >>> http://lists.wispa.org/mailman/listinfo/wireless >>> >>> Archives: http://lists.wispa.org/pipermail/wireless/ >> >> >> >> -------------------------------------------------------------------------------- >> WISPA Wants You! Join today! >> http://signup.wispa.org/ >> -------------------------------------------------------------------------------- >> >> WISPA Wireless List: [email protected] >> >> Subscribe/Unsubscribe: >> http://lists.wispa.org/mailman/listinfo/wireless >> >> Archives: http://lists.wispa.org/pipermail/wireless/ >> > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! 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