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From: Bill Sloman <bill.sloman@ieee.org>
Newsgroups: sci.electronics.design
Subject: Re: Yttrium iron garnet
Date: Thu, 30 May 2024 15:45:21 +1000
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On 30/05/2024 3:37 am, john larkin wrote:
> On Wed, 29 May 2024 17:12:21 -0000 (UTC), Cursitor Doom
> <cd999666@notformail.com> wrote:
> 
>> On Wed, 29 May 2024 13:52:34 +1000, Bill Sloman wrote:
>>
>>> Yttrium iron garnet tuned oscillators were around back then, but their
>>> 2GHz to 8GHz range was too high for me to count with the integrated
>>> circuits around then - we had to go the Gigabit Logic's GaAs parts to
>>> get to 800MHz, and that became the unique selling point of the system.
>>
>> YIG oscillators were quite the thing back in the day, but I'm guessing
>> they've been completely superseded by now to get to ever higher
>> frequencies. Seems we've gone from -

This misses Jan Panteltje's thread "Small magnetic tunable filter for 6G 
and beyond" which is about Yig being used today.

>> R/C to L/C to Xtal to YIG since about 1900. Did I miss any development(s)
>> out pre-YIG?
> 
> Tuning forks, SAWs, BAWs,  mechanical ceramic resonators, dielectric
> ceramic resonators, coaxial ceramic resonators, sapphire, cavities,
> atomic things.

As usual, John Larkin hasn't noticed that most of his list can't be 
rapidly tuned to a different frequency.

-- 
Bill Sloman, Sydney