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On-Wafer Biasing Using Kelvin Bias Tees

February 23, 2020

The VectorStar ME7838x series of broadband systems covers a range of 70 kHz to 110/125/145/220 GHz. The distinctive architecture of the Anritsu NLTL mmWave modules offer a DC path between the baseband VNA and the DUT through the module. This beneficial design offers the opportunity to switch between the baseband VNA for non-broadband applications and the mmWave module for on-wafer broadband measurements. An additional benefit is the ability to attach a Kelvin bias tee to the input side of the module for DC Kelvin biasing. This unique ability offers the opportunity to optimize Kelvin bias tee performance for the application and DUT characteristics as needed without having to perform major design changes within the mmWave module as found in other designs.

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