A technique for differential noise figure measurement with a noise figure analyzer [Technical Committee]

This article summarizes a new approach presented in [1] to measure the noise figure of a differential low-noise amplifier (LNA) based on familiar cold-hot single-ended noise figure measurements employed by the majority of noise figure analyzers/meters. This approach does not require external baluns or hybrids that have traditionally been employed in noise figure measurements of differential circuits. We envision that this technique could be automated in the future.