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A cantenna (a portmanteau blending the words can and antenna) is a homemade directional waveguide antenna, made out of an open-ended metal can. Cantennas are typically used to increase the range (or discovery) of Wi-Fi networks.
Patch antenna gain pattern. A directional antenna or beam antenna is an antenna which radiates or receives greater radio wave power in specific directions. Directional antennas can radiate radio waves in beams, when greater concentration of radiation in a certain direction is desired, or in receiving antennas receive radio waves from one specific direction only.
A television antenna, also called a television aerial (in British English), is an antenna specifically designed for use with a television receiver (TV) to receive terrestrial over-the-air (OTA) broadcast television signals from a television station.
It is said to be the most widely-used antenna in the world. [3] [4] Monopoles shorter than one-quarter wavelength, called electrically short monopoles are also widely used since they are more compact. Monopoles five-eights (5/8 = 0.625) of a wavelength long are also common, because at this length a monopole radiates a maximum amount of its ...
In radio communication and avionics a conformal antenna or conformal array is a flat array antenna which is designed to conform or follow some prescribed shape, [1] for example a flat curving antenna which is mounted on or embedded in a curved surface.
The quarter-wave monopole, the most compact resonant antenna, may be the most widely used antenna in the world. The five-eighth wave monopole – length 0.625 λ , or 5 / 8 of a wavelength – is also popular, since at that length monopoles direct the greatest proportion of their radiated power horizontally, hence the best use of ...
Arnold B. Bailey was granted the US patent 2,184,729 Antenna System on December 26, 1939, after filing in 1937 for a vertical antenna providing coaxial element sleeve structures.
The Cambridge World History. Volume 1: Introducing World History, to 10,000 BCE, edited by David Christian. The Cambridge World History is a seven volume history of the world in nine books published by Cambridge University Press in 2015. The editor in chief is Merry E. Wiesner-Hanks. The history takes a comparativist approach.