Column Control DTX
Active Load Pull Measurements at Millimeter-Wave and Sub-THz Frequencies

Active Load Pull Measurements at Millimeter-Wave and Sub-THz Frequencies

Solution Briefs

Upgrade your S-parameter test bench with accurate and repeatable gain compression and active load pull measurements at millimeter-wave and sub-THz frequencies

Performing device characterization measurements at millimeter-wave and sub-THz frequencies can be challenging for several reasons. First, it’s difficult to achieve accurate and repeatable power-control at the DUT reference plane when using waveguide extenders between 110 GHz and 1.1 THz, as the extenders typically output a fixed power. However, controlling the power delivered to the input of the DUT is critical in setting the device’s operating conditions and characterizing its performance over power, such as the large-signal characteristic gain compression. Second, load pull, which means changing the load impedance presented to the DUT to an arbitrary non-50Ω value, is difficult as passive load pull impedance tuners are typically unavailable above 110 GHz, and even then, are limited in their ability to present high mismatches at the DUT reference plane.

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Column Control DTX