Dan
I've proposed a microwave-based LO for the Pheonix receiver on the HPSDR
project (hpsdr.org); dunno if they'll use it or not.
The uW PLL ICs are usually a 24 pin leadless package, not BGA. But
nearly all microwave devices have a connection on the underside of the
package which must be soldered to ground. The only way to do this
reliably is using re-flow and solder paste, and the PCBs have to be PTH
so etching your own is not really an option.
The PLL ICs are programmed with a standard 3-wire serial interface -
there's nothing particularly difficult to do.
A uW LO is not necessarily the best option for every application, it's
just another that could be considered in addition to DDS and H+P.
regards
Grant
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