[time-nuts] Oscillator Phase Noise: A 50-Year Review

[Michael Wouters]

On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<time-nuts at febo.com> wrote:

> Leeson produced a somewhat random selection of papers , omitting important
> things like the sapphire based best in the word . This was not even
> referenced  .

The reference [145] at the end of the sentence that mentions sapphire
oscillators also discusses a hybrid photonic-microwave oscillator that
incorporates a room-temperature sapphire oscillator so I think he
tried to cover both subjects with that single reference.

The paper has a misleading title. It suggests that it is a history of
the last 50 years, when it is about events roughly 50 years ago. The
abstract makes this clear though. So I didn't really expect to read
much about developments past 1970.

Cheers
Michael


On Sat, Aug 6, 2016 at 9:34 AM, KA2WEU--- via time-nuts
<time-nuts at febo.com> wrote:
> Some of the cited references are poor, modern non-linear mathematic is kind
>  of omitted . After all the oscillator  phase noise speculation, I would
> have really liked to see at last a reference about the most modern
> measurements  techniques and it validation. How do you calibrate a phase noise test
> system.
>
> Leeson produced a somewhat random selection of papers , omitting important
> things like the sapphire based best in the word . This was not even
> referenced  .
>
> I think he is really out of it .
>
> 73 de N1UL
>
>
>
> In a message dated 8/5/2016 7:11:18 P.M. Eastern Daylight Time,
> john at miles.io writes:
>
>>
>> Very selected and incomplete references and the equally   important
>> question
>> of measurements strangely not  covered
>>
>> 73 de N 1  UL
>>
>
> I suppose he could  write an equally-lengthy article on measurements alone,
> but leaving out the  post-1970s history entirely was a little
> disappointing.  It was strange  to hit "ctrl-f Rohde" and see only one reference in the
> bibliography.   Same for "Hewlett."  "Rubiola" brings up one hit (but no
> citations) and  "Stein" brings up none at all.
>
> -- john, KE5FX
> Miles Design  LLC
>
>
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