Rick:
I really agree especially since I've looked into the drone motor
controllers.
They typically emit so much onboard and radiated hash that special by-pass
precautions are taken with some of the onboard sensors, e.g. accelerometers
for orientation sensing. I disagree that modelling software is adequate for
the typical antenna environment, e.g. antennas below a wavelength. Also
conformation of directional antenna's front-to-back and forward gain for
optimization purposes would be nice if even perhaps extravagant.
73, Gary K5AMH
PS: Most drone controllers use the STM ARM processors for which there
is free open source drone software: https://betaflight.com/
On 3/10/2021 2:34 PM, Rick Hiller via BVARC wrote:
Comment: Is an FSD applicable?
Although an FSD would provide a close-in Far Field pattern of an
antenna antenna installation, which is very cool indeed. Is it really
necessary in the world of Ham Radio?
We already have antenna modeling software based on the NEC which is
quite accurate, depending on the set up parameters provided, of
course. That model analysis provides us with a pattern and a fair
amount of operational information.
But what do we (I) really want? I want to know what and how my
antenna is performing in the real world outside of my QTH. Is it
getting to Europe or VK? When is the best time and frequency to get
to Japan or South Africa? Questions like this are not to be answered
by a FSD.
What we really need is a world wide system to detect our signals
wherever they may occur. So let's start thinking of that. We just
need a few hams on every continent to participate........Wait! Not so
fast.......there is already a system that does this. WSPR and it is
available from a local amateur radio dealer -- SOTA Beams
*_https://www.sotabeams.co.uk/wsprlite-classic
<https://www.sotabeams.co.uk/wsprlite-classic>. _* QST Dec 2018
even has a review of this system.
*_https://www.sotabeams.co.uk/content/QSTREVIEW.pdf
<https://www.sotabeams.co.uk/content/QSTREVIEW.pdf> _*
Now look, I am not poo pooing the FSD concept , ideas, discussion,
etc. Very cool indeed to get a group of folks excited and discussing
antenna stuff. Woo Hoo! I'm all for it, being the antenna phreak
that I am. I'm just taking a step back and seeing if it is
necessary, practical or even applicable for Hams. Plus, maybe some
don't know about WSPR.
73...Rick -- W5RH
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On Wed, Mar 10, 2021 at 1:57 PM Jeffery MacMillian via BVARC
<[email protected] <mailto:[email protected]>> wrote:
Here is a good paper on this very topic.....
https://www.narda-sts.com/en/selective-emf/srm-3006-field-strength-analyzer/eID/pd/pdce/9063/pdfr/9500/
<https://www.narda-sts.com/en/selective-emf/srm-3006-field-strength-analyzer/eID/pd/pdce/9063/pdfr/9500/>
have Fun,
Jeff
KC5TT
On Wed, Mar 10, 2021 at 1:31 PM Tom Watson via BVARC
<[email protected] <mailto:[email protected]>> wrote:
Brilliant!
On Wed, Mar 10, 2021, 12:22 AM Mark Brantana via BVARC
<[email protected] <mailto:[email protected]>> wrote:
OK, what is an FSD? It is a Field Strength Drone. It’s an
idea I am sure others have had, and I don’t expect to get
around to designing or patenting such a thing. But
inventions are often just the merging of new technologies,
and this is not much different. I don’t see any YouTubes
about this or any other reference, so here’s the idea:
With all the capabilities of little drones I wonder if
anyone has designed one which can carry a field strength
meter and fly a grid around an antenna to evaluate antenna
performance. The guts of my little Radio Shack FSM would
have weighed way less than an ounce.
Ideally, the field strength meter could communicate to the
base through the drone transmitter, reducing weight.
Software at the base could link the drone 3D location data
with the FS reading. The drone would have to wait at test
locations for the operator to transmit, and ideally would
move to the next location. Finally, the software might be
able to link with existing simulation software for
comparison with theory and allow for simulation model
improvement. This looks like it would take a small team to
develop.
This sounds like it would have many uses besides antenna
evaluation, like RFI evaluation.
What about it? Has anyone done this?
Mark
N5PRD
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--
Rick Hiller
*/e-mail: [email protected] <mailto:[email protected]>/*
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--
Gary Sitton, K5AMH
[email protected]
SDR/DSP Consultant,
"Have FFTs, Will Travel."
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