[Make-wifi-fast] beamforming and antenna debugging

[Make-wifi-fast] beamforming and antenna debugging

[Dave Taht]

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It is really good to be completely over my head for a change, to some
extent. From:

https://forum.openwrt.org/t/tuning-beamforming-and-antenna-design/203720

It is very rare these days that I get permission to talk about what I'm
doing, but today I did! Somos Internet has been designing and building
their own MT79 based internet router and bridge for the past few months.
They engaged me to take a look at the reference board, and we were really
pleased to see how well all of OpenWrt, not just the make-wifi-fast
fq_codel bits, was working nowadays.

That was last month. This month, they got back the new boards with a new
antenna layout, and the 5ghz performance at range is *terrible*. I confess
that I no longer have even the slightest grip on how to go about debugging
and improving antenna performance - are there beamforming variables worth
sweeping in the mt76 driver? A piece of test gear we could use to see what
is going wrong? A design tool for antennas? A debugging strategy for
antenna placement?



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Donations Drive.
Dave Täht CSO, LibreQos

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Re: [Make-wifi-fast] beamforming and antenna debugging

[Bob McMahon]

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I think you may be talking about front end modules. These are hard to
engineer and to manufacture, typically requiring a semiconductor company
teamed with specialists to do well.

https://investors.broadcom.com/news-releases/news-release-details/broadcom-introduces-fifem-worlds-first-wi-fi-rf-fem-filter

Bob



On Thu, Jul 11, 2024, 9:42 AM Dave Taht via Make-wifi-fast <
make-wifi-fast@lists.bufferbloat.net> wrote:

> It is really good to be completely over my head for a change, to some
> extent. From:
>
> https://forum.openwrt.org/t/tuning-beamforming-and-antenna-design/203720
>
> It is very rare these days that I get permission to talk about what I'm
> doing, but today I did! Somos Internet has been designing and building
> their own MT79 based internet router and bridge for the past few months.
> They engaged me to take a look at the reference board, and we were really
> pleased to see how well all of OpenWrt, not just the make-wifi-fast
> fq_codel bits, was working nowadays.
>
> That was last month. This month, they got back the new boards with a new
> antenna layout, and the 5ghz performance at range is *terrible*. I
> confess that I no longer have even the slightest grip on how to go about
> debugging and improving antenna performance - are there beamforming
> variables worth sweeping in the mt76 driver? A piece of test gear we could
> use to see what is going wrong? A design tool for antennas? A debugging
> strategy for antenna placement?
>
>
>
> --
> https://www.linkedin.com/feed/update/urn:li:activity:7203400057172180992/
> Donations Drive.
> Dave Täht CSO, LibreQos
> _______________________________________________
> Make-wifi-fast mailing list
> Make-wifi-fast@lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/make-wifi-fast

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