Microwave transmitters is a research field and engineering discipline focused on the theory, design, development, and application of electronic systems capable of generating and emitting electromagnetic radiation within the microwave frequency spectrum, typically ranging from 300 MHz to 300 GHz. This academic area investigates the fundamental principles of high-frequency signal generation, power amplification, modulation, and transmission, encompassing the study of device physics, advanced circuit design methodologies, system architectures, and performance optimization concerning efficiency, power output, spectral purity, and frequency control. Its significance is paramount in enabling critical technologies across diverse sectors including telecommunications, radar systems, remote sensing, industrial heating, medical applications, and scientific research such as plasma physics and controlled fusion energy experiments.