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The paper presents two designs of high-frequency, broadband frequency dividers. The designs are optimized for stability across process variations and high operating frequencies. The first design divides an input frequency range of 4-44GHz, drawing 4.4mA from a 1.2-V supply. The minimum input power is -5dBm at 40GHz. No performance degradation is observed at 50°C, and only 16% degradation at 75 °C. A second divider operates from dc-37GHz, consuming only 1.6mW at 30GHz. By not using inductive peaking, the designs achieve high bandwidth and small area (19μm by 40μm).