Fully monolithic Ku and Ka-band GaInP/GaAs HBT wideband VCOs

A family of fully monolithic VCOs utilizing GaInP/GaAs HBTs are presented for the first time. They operate at 14 GHz and 28 GHz with tuning bandwidths ranging from 10.7% to 19.6%. Output powers vary between -9 dBm and +3 dBm with an integrated 6 dB attenuator to reduce pulling. The fabrication yield is higher than 50%. On-wafer measurements show a very small dispersion, and good agreement with the small signal simulations.<
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