This article needs additional citations for verification. (May 2008) (Learn how and when to remove this template message)
|Competencies||Technical knowledge, Management skills, Professionalism|
|Mathematics, Physics, Electronics, Information technology|
|Radio, Television, Military|
|Technologist, Broadcast engineer, Engineering technician, Technical Operator|
Radio-frequency engineering, or RF engineering, is a subset of electrical engineering involving the application of transmission line, waveguide, antenna and electromagnetic field principles to the design and application of devices that produce or utilize signals within the radio band, the frequency range of about 20 kHz up to 300 GHz.
It is incorporated into almost everything that transmits or receives a radio wave, which includes, but is not limited to, mobile 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 radiative coverage of a specified geographical area by an electromagnetic field or to provide specified sensitivity to an electromagnetic field impinging on the antenna.
- Design of coupling and transmission line structures 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 transforming networks and other devices.
- Verification and measurement of performance of radio frequency devices and systems.
To produce quality results, the RF engineer needs an in-depth knowledge of mathematics, physics and general electronics theory as well as specialized training in areas such as wave propagation, impedance transformations, filters and microstrip printed circuit board design to name a few.
Typically, such circuits must operate at radio frequency and power levels, which imposes special constraints on their design. These constraints increase in their importance with higher frequencies. At microwave frequencies, the reactance of signal traces becomes a crucial part of the physical layout of the circuit.
List of radio electronics topics:
- RF oscillators: PLL, Voltage-controlled oscillator
- Transmitters, transmission lines, RF connectors
- Antennas, antenna theory, list of antenna terms
- Receivers, tuners
- Modulators, demodulators, detectors
- RF filters
- RF shielding, Ground plane
- PCB layout guidelines
- DSSS, noise power
- Digital radio
Radio-frequency engineers are specialists in their respective field and can take on many different roles, such as design, installation, and maintenance. Radio-frequency engineers require many years of extensive experience in the area of study. This type of engineer has experience with transmission systems, device design, and placement of antennas for optimum performance. The RF engineer job description at a broadcast facility can include maintenance of the station's high-power broadcast transmitters and associated systems. This includes transmitter site emergency power, remote control, main transmission line and antenna adjustments, microwave radio relay STL/TSL links, and more.
In addition, a radio-frequency design engineer must be able to understand electronic hardware design, circuit board material, antenna radiation, and the effect of interfering frequencies that prevent optimum performance within the piece of equipment being developed.
- Broadcast engineering
- Mathematics of radio engineering
- Overlap zone
- SPLAT! A software program for visualizing terrain and performing Longley-Rice path loss and coverage prediction using the Irregular Terrain Model.
- A. A. Ghirardi, Radio Physics Course, 2nd ed. New York: Rinehart Books, 1932, p. 249
- Signal Corps U.S. Army, The Principles Underlying Radio Communication, 2nd ed. Washington, DC: U.S.G.P.O., 1922, p. 191
- Technical Manual TM 11-665: C-W and A-M Radio Transmitters and Receivers. Dept. of the Army, US Government Printing Office. 1952. p. 2.
- "How to Measure Requirement for RF Equipments".