I can backup the third bullet point as I saw it from an antenna vendor’s viewpoint. The radios vendors forbid the antenna vendor from selling the interface plate.
Sent from my iPad > On Feb 8, 2019, at 6:55 PM, Daniel White <dwh...@atheral.com> wrote: > > So on the why... a few things I can add: > Many manufacturers believed their direct connect interface was special, or > proprietary... and would not openly provide specifications (I seem to recall > a former employer zealous lawyers threatening to sue someone on this list... > :-) > There was no advantage, on the manufacturer side, to standardize > it would also inevitably prevent manufacturers from making other changes they > may see as beneficial > Manufacturers want to sell antennas, and by creating a special interface they > control the supply chain of new antennas (since the antenna manufacturers > sign agreements to prevent it) > The market didn't push back hard enough on proprietary interfaces. > > > Daniel White > Co-Founder - Business Development & Operations > phone: +1 (702) 470-2770 > direct: +1 (702) 470-2766 > > Mark Radabaugh wrote on 2/8/19 16:00: >> To add to what Chuck said - >> >> The manufacturers don’t make the antenna’s specific to the various >> manufacturers other than adding an adapter plate. You can remove the radio >> mount from a Andrew / Commscope antenna and replace it with the adapter kit >> for the radio brand. The adapter kits can be ordered individually as >> needed - the hard part is finding the part numbers. Radiowaves is the same. >> We have changed a number of antenna’s from Dragonwave, PTP800, and SAF to >> PTP820 or SAF over the years. >> >> If anyone wants Andrew Remec (PTP800) adapters we have a pile of them. >> >> Mark >> >>> On Feb 8, 2019, at 5:25 PM, Chuck McCown <ch...@wbmfg.com> wrote: >>> >>> On rectangular waveguide, almost everyone conforms to the inside dimensions >>> of the waveguide for the frequency. However for some frequencies there are >>> up to three different waveguide sizes that will work. Lots of overlap in >>> the bandwidths of wavelengths. >>> >>> But for dual pol antennas, the feeds all have a circular waveguide and >>> those are much less common and not standardized. So they pick a diameter >>> that fits the center of their bandwidth. .750”, .777” .780” are all common >>> sizes used for 11 GHz. And really you can mate them with each other with >>> almost no return loss issues. >>> >>> My transgender / interspecies adapter products generally use the exact >>> diameter the antenna it mates with uses. >>> >>> Now, that is the inside of the waveguide. The outside of the waveguide, >>> the “nose” of the antenna, that is a variety of inventions by the various >>> radio manufacturers. The Remec design is most common. A handful of radio >>> vendors used that form factor. It is a bit larger than it needs to be with >>> the exception of 6 GHz rectangular. That just barely fits in a Remec and >>> would not fit in a Dragonwave. >>> >>> Exalt is so close to Remec it is laughable. I really wish they would have >>> just used the same dimensions, but everybody has to be different. I think >>> they may have believe that if they had their own standard, it would >>> increase brand loyalty as nobody wants to change antennas. But in reality, >>> I can make any radio work with any antenna if the frequencies are similar. >>> >>> From: Colin Stanners >>> Sent: Friday, February 08, 2019 2:56 PM >>> To: AnimalFarm Microwave Users Group >>> Subject: [AFMUG] Why hasn't there been a radio-antenna waveguide standard? >>> >>> Probably more a question for Chuck then anyone else. >>> >>> There's (ignoring frequency-related size) at least a dozen waveguide >>> connector standards to interface radios with antennas... when buying a >>> licensed backhaul radio, pretty much every physical and software interface >>> on the unit conforms to a standard, except the antenna interface. But it >>> seems that a physical-only interface like that would be the easiest to >>> standardize. Any idea why that has never happened in the industry? >>> >>> >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> -- >>> AF mailing list >>> AF@af.afmug.com >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> >> >> > > -- > AF mailing list > AF@af.afmug.com > http://af.afmug.com/mailman/listinfo/af_af.afmug.com
-- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
