# DC power consumption in Class-E power amplifier design using ADS

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#### eleka

##### Newbie level 1
I am trying to design a class-E power amplifier using ADS and using ideal elements (not transmission lines at this step), I have 2.8W DC power consumption while PAE is only 48%. The equation I use for DC power consumption is
Interpolated_Pdc=interpolate_y_vs_x(HB.Pdc,Pout_dBm,Desired_Pout_dBm,interpStepSize,interpType)
Pdc is
Pdc=real(Vs_high[0]*Is_high.i[0]+Vs_low[0]*Is_low.i[0])
which is multiplication of biasing (gate and drain) current a voltage.
Considering I'm using ideal elements, I can't find where's my fault... The above mentioned equations are correct or wrong? how can I solve this problem?