IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES《IEEE微波理论与技术汇刊》(月刊). The IEEE Transactions on Microwave Theory and Techniques is published monthly with a focus on that part of engineering and theory associated with microwave/millimeter-wave technology and components, electronic devices, guided wave structures and theory, electromagnetic theory, and Radio Frequency Hybrid and Monolithic Integrated Circuits, including mixed-signal circuits, from a few MHz to THz.