the Curtice-Ettenberg model is traditionally used to model
MESFETs, it was found to be a useful tool in accurately
predicting the performance trends in the Doherty. The finite
output impedance was found to have the biggest impact on
the performance and it can reduce the ideal Doherty P AE by
as much as 25 %. Finally, a 71-76 GHz DPA is proposed and
implemented in a 90-nm RF-CMOS process. The footprint
of the DPA is 1.53 mm2 and it has a P1dB of 11.7 dBm,
a P AE of 30.6 % and a P AE at 6-dB back-off of 15.6
%. At P1dB the DPA is consuming 21.7 mA from the 1.5
V supply. The reconfigurable option improves the gain by
3.2 dB and draws an additional 7.1 mA. This option makes
the circuit more functional at mm-wave frequencies. The
efficiency characteristics of the implementation are within 5
% of the model predictions.