Engineering:Microwave antenna

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.

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

Microwave frequency bands

Radio bands where microwave antennas are commonly deployed in 2016 FCC

C band	4 to 8 GHz	3.75 cm to 7.5 cm	4 GHz, 6 GHz
X band	8 to 12 GHz	25 mm to 37.5 mm	10 GHz, 11 GHz
Ku band	12 to 18 GHz	16.7 mm to 25 mm	12 GHz, 18 GHz
K band	18 to 26.5 GHz	11.3 mm to 16.7 mm	18 GHz
Ka band	26.5 to 40 GHz	5.0 mm to 11.3 mm	23 GHz, 31 GHz
Q band	33 to 50 GHz	6.0 mm to 9.0 mm	38 GHz
W band	75 to 110 GHz	2.7 mm to 4.0 mm	70 GHz, 80 GHz, 90 GHz

Uses

• One-way (e.g. television broadcasting) and two-way telecommunication using communications satellites
• Terrestrial microwave relay links in telecommunications networks including backbone or backhaul carriers in cellular networks linking BTS-BSC and BSC-MSC.
• Radar
• Radio astronomy
• Communications intelligence
• Electronic warfare

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.

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.