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S-parameter characterization of mm-wave IMPATT oscillators

Designing oscillators in a fully monolithically integrated technology requires accurate characterization of the active element, as well as the surrounding passive circuitry. Based upon S parameter measurements of Impatt diodes, millimeter wave oscillators up to 124 GHz have been designed,manufactured and measured. Two measurements setups covering the frequency range from 0.04-140 GHz were used and a careful calibration approach was applied