rezaee
Full Member level 2
Hi
i have designed a power amplifier circuit now i want to find the optim load impedance because of the maximum power transfer to the load and give the most PAE .
in one way i sweep the load impedance between two point with step size and i see which impedance give me best result ( for example Z1) in other way I use S-parameter simulation in ADS software ( all of supply short circuit and i add 50Ω terms in input and output) and with the equation of: Zout=50*(1+S(2,2))/(1-S(1,1)) i calculate output impedance of circuit ( for example Z2) Is it true that for transfer maximum power to load the load impedance must be complex conjugate of Z2??
If the answer to this question is YES then why Z1 isnt equal to complex conjugate of Z2 ???
i have designed a power amplifier circuit now i want to find the optim load impedance because of the maximum power transfer to the load and give the most PAE .
in one way i sweep the load impedance between two point with step size and i see which impedance give me best result ( for example Z1) in other way I use S-parameter simulation in ADS software ( all of supply short circuit and i add 50Ω terms in input and output) and with the equation of: Zout=50*(1+S(2,2))/(1-S(1,1)) i calculate output impedance of circuit ( for example Z2) Is it true that for transfer maximum power to load the load impedance must be complex conjugate of Z2??
If the answer to this question is YES then why Z1 isnt equal to complex conjugate of Z2 ???