MDPI Electronics Journal Special Issue "Advanced RF, Microwave, and Millimeter-Wave Circuits and Systems" Deadline for manuscript submissions (extended): 15 August 2023. Details: https://www.mdpi.com/si/107066 To submit a manuscript, please visit the above-mentioned link and click on the "Submit to Special Issue" tab located on the left menu. Dear Colleagues, RF/microwave circuits and systems play a crucial role in all modern wireless communication and Internet of Things (IoT) applications. It is no exaggeration to claim that not even a single aspect of our lives is untouched by RF/microwave technologies; they are ubiquitous—from the wireless doorbell to keyless entry to our cars, from cooking to industrial heating, from cell phone to computer systems, from medicine to space technologies, they are everywhere. The vast and rapid technological development at many levels (e.g., in semiconductor device technologies, simulation models, component miniaturization, and syst...