A 60-GHZ HEMT-MMIC ANALOG FREQUENCY-DIVIDER BY 2

This paper describes an analog frequency divider by two working in the millimeter wave frequency range around 60 GHz, This circuit is analyz ed with a new method that allows to determine the steady-state regime of any synchronized circuits with standard CAD commercial software. Th e method proposed relies upon the concept of open loop systems and is applicable to any feedback transistors circuits, The designed circuit was processed using a standard 0.25-mu m HEMT technology, Four transis tors were used for realizing the frequency division function as well a s the input and output amplification. More than 10% frequency lock-in bandwidth was achieved, and conversion gain was obtained using input a nd output buffers, Measured results were found in good agreement with simulated ones.