--------
In message <[email protected]>, Attila Kinali
writes:
> >The diameter of the blank has to be scaled with its thickness, in
> >order not to compromise the f*Q product. Which in turn makes it
> >a bit problematic in terms of packaging, but nothing unsolvable.
>
> Isn't that where "whispering gallery" modes come into the picture ?
Different concept. Quartz oscillators are mechanical resonators.
I am pretty sure that the first Quartz resonators Bell Labs played
with, almost a hundred years ago, were whispering gallery mode:
https://archive.org/details/bstj8-3-493/page/n3/mode/2up
--
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