Application of Device Electro-Thermal Models to the Design of Millimeter-Wave Frequency Multipliers

We present the application of two electro-thermal models developed for Schottky diodes to the design of millimeterwave frequency multipliers. First, we use a physics-based numerical self-consistent electro-thermal model integrated into a harmonic-balance code to obtain the diode physical parameters that optimize the multiplier performance. Then, we employ an analytical self-consistent electro-thermal model implemented into commercial circuit design software to determine the complete multiplier layout that optimizes the overall performance. The design and test of a tripler circuit with output frequency in the 75–105 GHz band validates the proposed methodology.