... R3,ratio = 0 .6 OBO = 4.4dB = 0.5 OBO = 6dB = 0.4 OBO = 8dB Fig. 16. R3,ratio as function of for different OBO () values. Advanced Microwave Circuits and Systems1 24 4. Advanced DPA ... R3,ratio = 0 .6 OBO = 4.4dB = 0.5 OBO = 6dB = 0.4 OBO = 8dB Fig. 16. R3,ratio as function of for different OBO () values. Advanced Microwave Circuits and Systems1 06 TheDohertyPowerAmplier ... S-band digital down converter for radar applications based on GaAs MMIC fast sample&hold’, IEE Proceedings -Circuits, Device and Systems, Vol.143, No .6 Dec. 19 96 pp.337-342 Advanced Microwave Circuits and Systems1 20...