Calculating and designing the broadband diode micro-assembly based 50-75 GHz frequency doubler

Abstract

Calculatiing and designing the broadband diode micro-assembly based 50-75 GHz frequency doubler" is dedicated to topical issues of modeling non-linear microwave and extreme high frequency band based devices using new hardware components that is the diode micro-assemblies containing the most critical part of the designed device alongside with nonlinear elements (diodes) (R, C- self-bias circuits and supply lines for connection).When modeling the broadband waveguide frequency doubler, the technique was used which had earlier been proposed by authors and which is CAD based combining electrodynamic modeling (finite-element calculation method) and the nonlinear analysis (harmonic balance calculation method). The frequency doubler design features are examined, modeling of diode integral micro-assembly is executed and the calculation and design of the 50-75 GHz frequency doubler is performed. Modeling technique enables to analyze the effect of the device design features and of diode parameters including their non-identity as well as their VCC and CVC nonlinearity nature on the frequency doubler’s basic technical characteristics: conversion efficiency, AFC unevenness, parasitic harmonics level in the output spectrum. And that analysis can be performed avoiding expensive and labor-consuming experimental research. The analysis resulted in the selection of the best option device. Comparison of the frequency doubler’s estimated performance with experimental data indicates close agreement in conversion efficiency and parasitic components suppression level. Thus, using integral diode micro-assembly together with calculation and design proprietary know-how enables to develop frequency doublers in 50-75 GHz range  with 4÷12 MW  output power, and in the long term - 8÷14 MW with P_{input signal}= 100 MW and  that exceeds the known domestic and foreign counterparts.