HMC997 and HMC565 Demo-board Capacitors


I am experiencing some differences between my PCB's (replicas of the demo boards) using these integrated circuits and the demo board that I ordered from Hittite. As these differences are the same and occur on the same bands (approx 17 GHz) in both HMC997 and HMC565, I am concluding that my experience is due to different capacitors.

I would like to know, if possible, what are the manufacturers and models of the 100 pF RF choke capacitors used in both these demo boards.

P.S.: The transmission lines impedances (in CPW) were validated using HFSS. They were adjusted to be 50 Ohm.

Thanks in advance,

Hugo Santos