Abstract
ABSTRACTWe demonstrated a novel self‐oscillating up‐conversion mixer with double‐conversion structure in order to overcome a high conversion loss of a self‐oscillating sub‐harmonic up‐conversion mixer. The self‐oscillating double‐conversion mixer consists of a self‐oscillating up‐conversion mixer and an up‐conversion gate mixer, based on two 100 nm pseudomorphic high electron mobility transistors (PHEMTs). The mixer has an operating frequency of 77 GHz due to the double‐conversion of self‐generated fundamental LO frequency of 38.5 GHz. The mixer exhibits a good conversion gain of 3.87 dB and a phase noise of −92.9 dBc/Hz at 10 MHz offset. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1989–1993, 2016
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