How to match the output impedance of PA?

[TerryADS]

pa output matching

Hi frieds,
We use MMIC (die) with PA integrated. Power of PA is supplied exterior, and I firstly measure the impedance (for bonding wire) and match to 50 Ohm. I hear that somebody said matching needs to be done without DC component .So I have a question: whether can i use VNA directly connect to MMIC PA output without DC decouple (My VNA: 8753E~+26dBm RF, 30VDC max) and the measure result is correct?
Another question, if I want to measure 32dBm RF signal using the same VNA, how can I measure the output impedance of PA?
Thanks,

 

[kspalla]

how to match impedance

Its better to use load pull technique. Take care that you will protect the VNA from PA DC(with AC couple).
You can use a pad to measure 32dBm as VNA can not handle this much power.

 

[vfone]

pa output load

**broken link removed**

 

[TerryADS]

how to match a pa

Thanks for kspalla's and vfone's help.Datasheet gives me Zlopt,and because it is die IC,the bonding wire and the PCB trace will impact the matching to 50 Ohm,Should i do load pull test or use VNA to measure the impedance that changed by adding bonding wire and trace,and then match to 50Ohm?

 

[vfone]

pa output impedance

If the output power is in the VNA input range you can use the VNA.