RF engineering, or radio frequency engineering, is a specialized field within electrical engineering that deals with the design, implementation, and maintenance of radio frequency systems. This includes the design and optimization of radio frequency circuits, antennas, transmitters, receivers, and other components used in wireless communication systems such as cell phones, radar systems, satellite communication, and Wi-Fi networks. RF engineers must have a strong understanding of electromagnetic theory, signal processing, and communication principles in order to effectively design and troubleshoot radio frequency systems. The demand for RF engineers is high in industries such as telecommunications, aerospace, defense, and consumer electronics.