impdance matching on pa

I use the loadpull simulation method in SpectreRF and get the Zo=104.7+j323.65ohm. So I use a common L-network to transform the 250ohm load to Zo. But I got small power at the load(indicated in figure B) while the voltage at Point A is the largest power.
There must be something wrong with my understanding of impedance transformation.
Anybody can explain why this happens and how to design the impedance transformation network?

is the load impedance is 50ohm or 250 ohm

khouly

250ohm

did u make the impedance of the port to be 250 ohm , or it is 50 ohm

khouly

Yes, I made it 250ohm.

what is the frequency of operation


khouly

fo=433MHz

make the inductor 164 nH and the capacitor 1.9 pF

khouly

Thank u very much. I am so careless.
I calculated it directly on calculator without writing down the process,which lead to a falsed value.
RF really needs careful step-by-step analysis and deduction.
The exact value should be 1.73pF 168.7nH.
Thanks again.

u welcome , but u need to read any article about impedance matching using smith chart , it will help u alot in designing these networks

khouly

I have read some, but I don't know whether it is suitable for my application.
I simulated my PA with the Chokes and Inductors replaced with murata models and the output power decreased about 1dB. Do u have any suggestions in practical design?
For example, PCB, practical loadpull and other.

Added after 7 minutes:

khouly,
Another question:
Do u know the harmonic requirements in constant wave modulation method(mine is FSK) or have any articles about that?
How much lower the second and third harmonic should be than the 1st?

yeah , when u use the models sure the power will degrade coz the loss of the inductors and the parasitic capacitances , u need to get high quality factor inductors.
about the PCB check this link
http://pesona.mmu.edu.my/~wlkung/ADS/ads.htm

about the harmonic requirements u should know that from the receiver performance

khouly