Hi mg777-
Thanks for the info. I don't have the vendor's evaluation board. I simply used the reference schematic and followed good layout practices in my own board. Vctl is set to Vcc in my board via a ucontroller's I/O.
My board is 10 mil FR-4. What RF choke are you referring to? In their reference schematic I don't see a choke listed... All my Ls and Cs are murata RF components. I'm going to try to sweep them on a network analyzer and make sure that @ 2.4GHz they are the correct inductance/capacitance.
I was indeed thinking that I should measure S12 of the PA by biasing the PA with a larger inductor and no C4. I'm going to try to do that tomorrow, but the equipment is pretty tied up these days
In general though, am I correct in stating that at the particular values for C4 and L1 given in the reference schematic that 2.4GHz will find a nice path to ground while 7.1GHz will easily be passed to the antenna? Thanks a lot for your help,
D