At the higher frequencies, like 11 GHz, circulators and filters are small
enough you can cobble together an outdoor only system. I cannot over emphasize
that Tim said about losses. 3.6 dB adds directly to the noise figure and that
is the holy grail of SNR and receiver sensitivity.
From: Tim Hardy
Sent: Friday, February 08, 2019 3:09 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Exalt Wireless Support
The circulator/filter method is used with virtually every 2+0 or more indoor
radio setup. Combiners are used for outdoor models such as those we have been
discussing here and a typical loss per side is about 3.6 dB or 7.2 dB on the
path. This shouldn’t be overlooked when designing high capacity / high
modulation systems since you will need every bit of system gain you can get (or
antenna sizes must be greatly increased).
Whenever looking at competing radios and their published capacities, it is also
important to closely examine and compare their system gains to see what works
on your proposed path. As an example, the Navigator High Capacity 80 MHz Bmw
radio has a 68.7 dB system gain at 4096 QAM vs. 77 dB system gain on the Aviat
WTM 4100 similarly configured.
Sent from my iPad
On Feb 8, 2019, at 4:13 PM, <ch...@wbmfg.com> <ch...@wbmfg.com> wrote:
You can put as many radios as you want on an antenna subject to bandwidth
limits of the antenna and everyone getting along frequency wise. This shows
the circulator/filter method. There is a hybrid combiner method too but I
think you lose more signal with that method.
<image[1].png>
From: Colin Stanners
Sent: Friday, February 8, 2019 2:02 PM
To: AnimalFarm Microwave Users Group
Subject: Re: [AFMUG] Exalt Wireless Support
You'd need two 11Ghz combiners to combine each of the AF11 polarities from
the radios to the antenna... I'm not sure if you'd need to have high/low-pass
filters as well, depends how good those radios are at filtering powerful
out-of-channel noise.
With the Bridgewave example those would be full 80mhz carriers, so 160Mhz of
spectrum on each polarity.
On Fri, Feb 8, 2019 at 2:14 PM Matt <matt.mailingli...@gmail.com> wrote:
Is it possible to do dual radios on one antenna with the AirFiber11 to
double throughput?
>>dual-polarity/XPIC and 4x carriers (2 on each polarity)
With the Bridgewave, does that mean you are transmitting on two 40mhz
carriers on each polarity or two 80mhz carriers or each polarity?
On Fri, Feb 8, 2019 at 12:40 PM Colin Stanners <cstann...@gmail.com> wrote:
>
> Depends on channel numbers and size. With dual-polarity/XPIC and 4x
carriers (2 on each polarity), at full 2048QAM the Bridgewave Navigator can do
2.5Gbps each direction.
>
> On Fri, Feb 8, 2019 at 12:17 PM Matt <matt.mailingli...@gmail.com> wrote:
>>
>> What is the most throughput you can get out of a single 11ghz dish and
how?
>>
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