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
o 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.
Logo <https://atheral.com/>
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 <[email protected]
<mailto:[email protected]>> 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
<http://grante.hu/products/passives/ordering.html> 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?
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