.." we have seen improvements in reflectors that can’t be explained by anything else in both high and noise environments. "
The explanation is very simple... just look at the physical position of how the radio is mounted.. The back side of the radio is pointing to the ground, and the reflector is only focusing the energy downwards.. Thus very little is picked up from the back side of the radio and the back side of the reflector.. Additionally there are pretty much no side lobes.. It's physics and geometry :) Regards. Faisal Imtiaz Snappy Internet & Telecom http://www.snappytelecom.net Tel: 305 663 5518 x 232 Help-desk: (305)663-5518 Option 2 or Email: supp...@snappytelecom.net > From: "Rory Conaway" <r...@triadwireless.net> > To: af@afmug.com > Sent: Wednesday, January 24, 2018 1:00:49 AM > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Thanks. I’ll have to do more testing at specific frequencies to be more > accurate > but so far we have seen improvements in reflectors that can’t be explained by > anything else in both high and noise environments. > Rory > From: Af [mailto:af-boun...@afmug.com] On Behalf Of ch...@wbmfg.com > Sent: Tuesday, January 23, 2018 9:14 AM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Depends on the design. > If the gains are the same, then go to F/B ratio to decide. > If approx equivalent then check the look of side lobes. > Nothing magic about parabolas. They are just highly characterized and easy to > do. > A good patch array can be just as good for some applications. > From: Rory Conaway > Sent: Monday, January 22, 2018 10:45 PM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > So Chuck, what’s your opinion? Parabolic or reflector that the manufacturers > spec out at approximately the same gain? > Rory > From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of Chuck McCown > Sent: Monday, January 22, 2018 8:16 AM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Gain of a parabolic reflector: > =10*LOG((0.55*((3.1415*Dia/Lamda)*(3.1415*Dia/Lamda))),10) > .55 is the efficiency factor. Most of them range between .55 and .60 > Diameter is in inches. Lamda is in inches. > From: Rory Conaway > Sent: Monday, January 22, 2018 7:08 AM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > If you are talking about the 2’ dishes, their gain in 5GHz is the same as the > KP > reflector. We may test that but honestly, between the price difference which > is > more than $100, the weight, and the complexity, it would have to be > significantly better and I doubt it is. > Rory > From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of Mike Hammett > Sent: Monday, January 22, 2018 6:58 AM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > They still work down there, just lose a couple dB. Their better rejection > makes > up for it. > ----- > Mike Hammett > Intelligent Computing Solutions > Midwest Internet Exchange > The Brothers WISP > From: "Rory Conaway" < r...@triadwireless.net > > To: af@afmug.com > Sent: Monday, January 22, 2018 7:57:40 AM > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Most Jirous antennas aren’t good for under 5.4GHz though. We started using > them > after being told more than 2 years ago they would have updated nose cones > shortly. I’m still waiting. > Rory > From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of Mike Hammett > Sent: Monday, January 22, 2018 6:30 AM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Jirous makes antennas with good patterns. > ----- > Mike Hammett > Intelligent Computing Solutions > Midwest Internet Exchange > The Brothers WISP > From: "David Coudron" < david.coud...@advantenon.com > > To: af@afmug.com > Sent: Sunday, January 21, 2018 9:04:56 PM > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > We love the KP Performance antennas for the CPEs, but haven’t used them yet > for > backhaul. Have you been using them for that as well? We were worried the wider > beamwidth would catch too much other noise. Or maybe that hasn’t been an > issue? > Thanks, > David Coudron > From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of Rory Conaway > Sent: Sunday, January 21, 2018 8:56 PM > To: af@afmug.com > Subject: Re: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > Right now the best antenna we have tested at 30dBi has been the KP Performance > antennas. We will be testing the RF Elements antennas next. > Rory > From: Af [ mailto:af-boun...@afmug.com ] On Behalf Of David Coudron > Sent: Sunday, January 21, 2018 6:49 PM > To: af@afmug.com > Subject: [AFMUG] Arc Wireless 30 dBi vs RocketDish RD-5G30 > We have traditionally been using the Arc Wireless 30 dBi 5 GHz parabolic dish > for our shorter backhaul links when using 5 GHz. The have been OK, but we have > a tough time getting them and the radomes from time to time. We are in that > situation again. They are priced quite competitively, and seem to do the job, > however we are looking for options since they are so spotty to get ahold of. > We > have messed around with the Ubiquiti RocketDish for CPE connectorized radios, > but haven’t tried them out for backhaul as of yet. The specs appear to be very > similar and I expect they’d perform about the same other than the N-Type vs > SMA > connectors. Anyone have experience with both of these dishes? Or is there a > better alternative that we should be looking at in the $120 range (dish only)? > Regard, > David Coudron
