Abstract
This letter presents an ultra-broadband low-noise amplifier (LNA) with a 3-dB bandwidth of 80 GHz, covering the entire WR5 frequency band (140–220 GHz). Broadband gain and noise performance are obtained through optimal bias selection, dc coupling, and stagger tuning. <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$Y$ </tex-math></inline-formula> -factor noise figure (NF) measurement results are presented. A NF of 6.9, 6.1, and 8.2 dB is measured at 150, 180, and 210 GHz. Implemented in IHP 130-nm SiGe BiCMOS process, the LNA has a peak gain of 15.5 dB, while consuming 46-mW dc power.
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