A NLTL-Based Integrated Circuit for a 70-200 GHz VNA System

We present an integrated circuit, based on nonlinear transmission lines (NLTL), for network analysis within 70-200 GHz. This is the first integrated circuit containing all elements of a S-Parameter test set: A multiplier to generate the RF signal, couplers to separate the incident and reflected waves, and a pair of high speed sampling circuits for down-converting the signals to lower frequencies.