Abstract
This article presents a two-channel 70-110-GHz frequency quadrupler in the GF8HP 0.12-μm SiGe BiCMOS process. The ×4 frequency multiplication is based on cascaded frequency doublers with an interstage bandpass filter to reject undesired harmonics. The measured peak output power is -1.5 to 3 dBm at 70-110 GHz, with a worst case harmonic rejection ratio (HRR) of >30 dBc. The chip size is 1.9 mm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> and consumes 240 mW for the two-channel operation. To the best of our knowledge, this article represents state-of-the-art in terms of bandwidth, output power, and excellent HRR. Application areas include mm-wave multi-channel, mm-wave network analyzers, and wideband sources for radar and imaging systems and reconfigurable E-band radios.
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