So Broadcom and CEL axed all their 3-GHz class pHEMTs, but CEL has introduced some interesting new 12 GHz ones, e.g. .
That one has a typical 0.3 dB noise figure at 12 GHz! I'll have to get a few and measure their 1/f noise. The SKY65050 (which you can still get) has about a 30 MHz 1/f corner, but is otherwise very nice. So hopefully these ones don't have 100 MHz corners.
As with most pHEMTs, it has a horribly low drain impedance of about 200 ohms, and like most SS microwave parts, it has a low V_DSmax (4V).
It would make a dynamite cascode with a BFP640 though, if I can keep it from oscillating. The 3-GHz pHEMTs are very well behaved by themselves.
Cheers
Phil Hobbs