A Generalized Nonlinear Model of 1-bit PIN-diode Based Transmitarray Unit Cell

This paper presents the results of an analysis of the nonlinear distortions in the transmitarray unit cell caused by the control element. The model of a unit cell with a one-bit PIN diode phase shifter was developed, to evaluate the loss and third-order intermodulation products dependencies on an applied voltage. The unit cell was manufactured and measured to prove the model simulation results. Measurements results of the transmission coefficient modules and third-order intermodulation products level as function of input power for different bias voltages are in a good agreement with the simulated results. It allows using this model for the estimation of the linear and nonlinear performance of the transmitarray.