[time-nuts] Close in phase noise of microwave VCOs
jimlux at earthlink.net
Fri Jun 19 01:07:44 UTC 2015
On 6/18/15 1:46 PM, Brooke Clarke wrote:
> Hi Mark:
> Is there any documentation on the HB100?
first hit on google for "HB100 microwave sensor" (recognizing that what
comes up as *my* first hit will probably be different than *your* first
links to some data sheets.
There's people building arduino shields for these things. They're also
available with more electronics on the back that does the "motion
detector" kind of function with a single bit output.
I haven't found a $10 unit that has both I/Q yet
The old MA/Com gunnplexers didn't have I/Q either, but they did have a
varactor for modulating.
Of course, you can also modulate a gunn by just changing the bias
voltage. Wretchedly non-linear, but that's what a DAC and lookup table
Just for fooling around, I'd love something like the HB100, with the
ability to modulate it over a few hundred MHz (leaving out DROs as an
option) and with I/Q detection (doesn't have to be perfect quadrature,
"about 90 +/- 20 degrees" is good enough: the errors are easy to
Probably can't do it for $10, though. More like $100 (in small quantities)
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