The IEEE Microwave Theory and Technology Society (MTT-S) is a technical society within IEEE, bringing together a global community focused on microwave and wireless technologies. Its work spans high-frequency theory, circuits, and systems, from megahertz through terahertz applications. MTT-S supports members through technical publications, conferences, educational programs, professional networks, and volunteer-led chapters.

Its publication portfolio includes IEEE Transactions on Microwave Theory and Techniques, IEEE Microwave and Wireless Technology Letters, IEEE Transactions on Terahertz Science and Technology, IEEE Journal of Microwaves, and IEEE Microwave Magazine, alongside other journals and books. The Society technically and financially sponsors and co-sponsors conferences, including the International Microwave Symposium, and offers webinars, short courses, workshops, and Distinguished Microwave Lecturers. Membership resources include student programs, scholarships and graduate fellowships, young-professional activities, awards, standards work, and opportunities to participate in technical committees.

MTT-S also provides author and reviewer guidance, educational materials, and online resources such as Microwaves101. com. Through these activities, it advances knowledge sharing, learning, and collaboration across the microwave engineering community