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Analysis of mesfet injection-locked mixer

In this paper, the formulation, simulation and measurement results of a MESFET injectionlocked mixer (ILM) are presented. This novel mixer is shown to have high conversion gain, low LO power level, and a wide IF operation frequency range. In the analysis, both quasilinear and nonlinear state equations to describe ILM are derived based on the use of power series expression for the MESFET nonlinear elements. Results of ILM conversion gain at different RF power level and LO frequency are presented. Both the quasi-linear and nonlinear approaches are shown to give good agreements with the measurement results.