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2. Horn antenna - Wikipedia

   en.wikipedia.org/wiki/Horn_antenna

   Pyramidal horn (fig. a) – a horn antenna with the horn in the shape of a four-sided pyramid, with a rectangular cross section. They are a common type, used with rectangular waveguides, and radiate linearly polarized radio waves. [12] Sectoral horn – A pyramidal horn with only one pair of sides flared and the other pair parallel. It produces ...

3. Radiation pattern - Wikipedia

   en.wikipedia.org/wiki/Radiation_pattern

   The top shows the directive pattern of a horn antenna, the bottom shows the omnidirectional pattern of a simple vertical dipole antenna. In the field of antenna design the term radiation pattern (or antenna pattern or far-field pattern) refers to the directional (angular) dependence of the strength of the radio waves from the antenna or other ...

4. Antenna types - Wikipedia

   en.wikipedia.org/wiki/Antenna_types

   Horn A horn antenna has a flaring metal horn attached to a waveguide. It is a simple antenna with moderate gain of 15 to 25 dBi, used for applications such as radar guns, radiometers, and as feed antennas for parabolic dishes. Slot Consists of a waveguide with one or more slots cut in it to emit the microwaves. Linear slot antennas emit narrow ...

5. Direction finding - Wikipedia

   en.wikipedia.org/wiki/Direction_finding

   [26]: 257 For a rectangular horn, Gain ≈ 30000/BW h.BW v, where BW h and BW v are the horizontal and vertical antenna beamwidths, respectively, in degrees. For a circular aperture, with beamwidth BW c, it is Gain ≈ 30000/BW c 2. Two antenna types, popular for DF, are cavity-backed spirals and horn antennas.

6. File:Horn antenna types.svg - Wikipedia

   en.wikipedia.org/wiki/File:Horn_antenna_types.svg

   English: Common types of horn antenna. They are: (a) Pyramidal horn (b) E-plane sectoral horn (c) H-plane sectoral horn (d) Conical horn (e) Exponential horn. Date: 6 ...

7. Waveguide (radio frequency) - Wikipedia

   en.wikipedia.org/wiki/Waveguide_(radio_frequency)

   In radio-frequency engineering and communications engineering, a waveguide is a hollow metal pipe used to carry radio waves. [1] This type of waveguide is used as a transmission line mostly at microwave frequencies, for such purposes as connecting microwave transmitters and receivers to their antennas, in equipment such as microwave ovens, radar sets, satellite communications, and microwave ...