Guest Editorial Mini-Special Issue on the 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre-Wave Circuits

This Mini-Special Issue of the IEEE Transactions on Microwave Theory and Techniques (TMTT) contains four expanded papers from the 2023 International Workshop on Integrated Nonlinear Microwave and Millimetre- Wave Circuits (INMMiC), which was held in Aveiro, Portugal, from November 8 to 10, 2023. The INMMiC is a forum for promoting, discussing, and spreading ideas in the field of nonlinear microwave and millimeter-wave circuits and systems. The INMMiC Workshop was originally launched in Duisburg, Germany, in 1990, and achieved its present form in Rome, Italy, in 2004, after a dormant period of several years. Subsequently, the INMMiC was held at different venues around Europe, namely: in 2006 in Aveiro, Portugal; 2008 in Málaga, Spain; 2010 in Gothenburg, Sweden; 2011 in Vienna, Austria; 2012 in Dublin, Ireland; 2014 in Leuven, Belgium; 2015 in Taormina, Italy; 2017 in Graz, Austria; 2018 in Brive-La-Gaillarde, France; and in 2022 in Cardiff, the U.K.