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please help to have better design

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rezaee

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i have designed a power amplifier for 2.4ghz in ADS and i simulate it in S-Parametere simulation and plot Z(2,2) vs frequnce i see output impedance of circuit is 30.49Ω but the load impedance that give maximum power (RL-opt) is near 10Ω now i want to match the output to 50Ω but i have 2 question:1-is it true that i tell?? 2- which impedance i should match to 50Ω , 30.49Ω or 10Ω ??
you can see my simulation plot at picture.
 

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