Ka-Band SiGe HBT Low Noise Amplifier Design for Simultaneous Noise and Input Power Matching

This letter presents the design and implementation of a Ka-band low noise amplifier (LNA). The LNA is based on a cascode amplifier using 0.12 mum SiGe heterojunction bipolar transistors (HBT). A new design procedure for simultaneous noise and input power matching is developed considering the collector-base feedback capacitance . At 33-34 GHz, the LNA results in a measured gain of 23.5 dB, a return loss of2, consuming 6 mA from 1.8 V supply (11 mW). The output 1 dB compression power is -6 dBm. To our knowledge, these are state-of-the-art results and show the validity of the design technique.