Microwave antenna

A microwave antenna[1] [2] is a physical transmission device used to broadcast microwave transmissions between two or more locations.[3] In addition to broadcasting, antennas are also used in radar, radio astronomy and electronic warfare.

A typical larger microwave antenna designed for mid to long range
A parabolic satellite antenna for Erdfunkstelle Raisting, based in Raisting, Bavaria, Germany.
C band horn-reflector antennas on the roof of a telephone switching center in Seattle, Washington, part of the U.S. AT&T Long Lines microwave relay network.

Microwave frequency bands
Radio bands where microwave antennas are commonly deployed in 2016 FCC[4]
C band4 to 8 GHz3.75 cm to 7.5 cm 4 GHz, 6 GHz
X band8 to 12 GHz25 mm to 37.5 mm 10 GHz, 11 GHz
Ku band12 to 18 GHz16.7 mm to 25 mm 12 GHz, 18 GHz
K band18 to 26.5 GHz11.3 mm to 16.7 mm 18 GHz
Ka band26.5 to 40 GHz5.0 mm to 11.3 mm 23 GHz, 31 GHz
Q band33 to 50 GHz6.0 mm to 9.0 mm 38 GHz
W band75 to 110 GHz2.7 mm to 4.0 mm 70 GHz, 80 GHz, 90 GHz

Uses
See also: Microwave transmission

Antenna types

Reflector antennas

A parabolic antenna is an antenna that uses a parabolic reflector, a curved surface with the cross-sectional shape of a parabola, to direct the radio waves. These devices range anywhere from 6" to more than 12' diameter depending on application and use.

Horn antennas

A horn antenna or microwave horn is an antenna that consists of a flaring metal waveguide shaped like a horn to direct radio waves in a beam. Horns are widely used as antennas at UHF and microwave frequencies, above 300 MHz.[5]

Lens antennas

A lens antenna uses a lens to direct or collect microwave radiation.

Array antennas

An array antenna is a high gain antenna consisting of an array of smaller antenna elements.

Leaky wave antenna

A leaky wave antenna uses a leaking transmission line to obtain radiation.

See also

References
  1. Silver, S. (1984), Microwave Antenna Theory and Design (Electromagnetic Waves), The Institution of Engineering and Technology; Reprint edition, p. 640, ISBN 978-0863410178
  2. Kildal, Per-Simon (2015), Foundations of Antenna Engineering: A Unified Approach for Line-of-Sight and Multipath (PDF), Kildal Antenn AB, p. 450, ISBN 978-91-637-8515-3
  3. Balanis, Constantine (2005), Antenna theory; analysis and design, Willey-Interscience
  4. http://wireless.fcc.gov/services/index.htm?job=service_home&id=microwave
  5. Bevilaqua, Peter (2009). "Horn antenna - Intro". Antenna-theory.com website. Retrieved 2010-11-11.
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