A self‐oscillating mixer with double‐conversion structure for 77 GHz applications

Abstract

We 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

High rejection self-oscillating up-conversion mixer for fifth-generation communications

“…Table 3 summarizes the main characteristic parameters of SOMs published in the literature. The conversion gain of our SOM is 6.385 dB which is greater than the one of the structures studied in [9], [11], [27], [28]. In addition, our circuit allows high rejection of unwanted harmonics at its output.…”

“…High integration also leads to a tangible reduction in the costs of semiconductor technologies [7], [8]. In this context, the research presented in Winkler et al [8] and Lee et al [9] is carried out. They propose the design of self-oscillating mixer (SOM) circuit, which combines the harmonic generation, and the frequency conversion functions in a single RF chip.…”

“…The experimental results exhibit a conversion gain of -30 dB under -38 dBm input power. An up-conversion SOM for 77 GHz applications is presented in the paper [9]. This circuit has a high conversion gain of 3.87 dB.…”