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Loadpull analysis of CGHV40100

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romilpatel

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Hi all,

I did loadpull analysis of the cree CGHV40100 for 2.492 GHz frequency with 40dBm input power as follows:

1.png

Output : (PAE = 54.301 and Pmax = 50.027).

2.png

After that, I designed stability network and DC bias network for the device. Loadpull analysis of the CGHV40100 along with designed network are as follows:
3.png
Where detailed schematic of the circuit including DC bias & Stability network is as follows:
4.png

Output : (PAE = 5.567 and Pmax = 36.625)

5.png

why is that so? what could be the possible flaws in the circuit?
 

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