Radio-frequency engineering , or RF engineering , is a subset of electrical engineering that involves the application of transmission line , waveguide , antenna, and electromagnetic field principles to the design and application of devices. that produce or use signals within the radio band , the frequency range of around 20 kHz up to 300 GHz .
It is incorporated into almost everything that a radio wave transmits or receives , including, but not limited to, cell phones , radios , Wi-Fi , and two-way radios. RF engineering is a highly specialized field that typically includes the following areas of expertise:
Design of antenna systems to provide radiation coverage of a geographic area determined by an electromagnetic field or to provide the specified sensitivity to an electromagnetic field incident on the antenna.
Design of coupling structures and the transmission line to transport RF energy without radiation.
Application of circuit elements and transmission line structures in the design of oscillators, amplifiers, mixers, detectors, combiners, filters, impedance transform networks and other devices.
Verification and performance measurement of radio frequency devices and systems.
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