[time-nuts] distribution amps for 200 MHz

[Richard (Rick) Karlquist]

I also need ~200 MHz buffers for a client.

See:

State-of-the-Art RF Signal Generation
 From Optical Frequency Division

Sept 2013 IEEE Trans UFFC, p 1796

In Table I (top of page 1798)
they list the RFMD RF2312 amplifier.
Table II top of page 1799 shows
that this is good for -150 dBc/Hz at 1 Hz
for a 5 MHz carrier. The bandwidth of this
amplifier goes way beyond 200 MHz, so
I am assuming the phase noise should be good
at 200 MHz.  Maybe not 150 dBc/Hz,
but still respectable for 200 MHz,
vs other amps.

RFMD went through a half dozen mergers and the RF2313
is now made by Qorvo and sold thru the usual
distributors.  I characterized it and it
wants to be used in a 75 ohm, not 50 ohm
system.  There are always transfomers...

My HP11848 went south so I was never able to
measure its phase noise at 200 MHz.  Anyone have have
an 11848 to sell?

If someone would like to measure it for me,
I will be happy to send an evaluation board.

Rick N6RK

On 9/15/2020 11:17 AM, jimlux wrote:
> For work, I'm looking to distribute 200 MHz to 44 widgets..
> The usual SRS, etc. boxes max out at 100 MHz.  Any ideas?
> 
> (The going in position is "buy a bunch of minicircuits amps and dividers 
> and assemble it")
> 
> Tnx
> Jim
> 
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