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Re: An interesting calibration method ¡°Quickcal¡± on Agilent Fieldfox range


Dr. David Kirkby from Kirkby Microwave Ltd
 

On Mon, 16 Sep 2019 at 06:30, Rune Broberg <mihtjel@...> wrote:

It sounds like the kind of thing that would be patented. Maybe US6643597B1
is related?

Expired patents can be potential sources for how to do some of these
things.

--
Rune / 5Q5R

Yes, I could see a method like Quickcal could be patented. I can see an
obvious need to do that it you are producing hardware which is easily
copied. I am no expert, but it might be better not to disclose software
ideas, as you can bet that the Chinese will just ignore such patents.

I must admit to being confused by the US patent US6643597B1. I will need to
read it 100 times over to make any sense of it. At first glance it seems to
suggest that one doesn¡¯t needs a calibration kit.


I don¡¯t know what the position is regarding patents and non-commercial
products, or products that are sold commercially, but for which others have
developed GPL software. *Either way, I think the Chinese will ignore any
patent. *

The FieldFox instruments (perhaps with the exception of the brain dead
N9912A) don¡¯t need a calibration kit to make measurements on the ports as
they are calibrated there. This was the post that got me thinking Quickcal
was implemented by a time domain transfer but looking at it again, I
don¡¯t see why I assumed that



Quickcal relies on one having a good knowledge of the connector, as you
need to enter it - both the type and gender.

Dave
--
Dr. David Kirkby,
Kirkby Microwave Ltd,
drkirkby@...

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