ABSTRACT: Vector-receiver load pull (VRLP) directly measures both incident and reflected waveforms (a- and b-waves) at the DUT reference plane. By providing full complex wave information, a VRLP system with the Maury Microwave NT series automated impedance tuner and powerful InsightProTM software enables real-time impedance verification, more accurate power and efficiency measurements, oscillation detection, and enhanced stability analysis at D-band.