What is a antenna in technology?
An antenna is a specialized transducer that converts radio-frequency (RF) fields into alternating current (AC) or vice-versa.
What is antenna Wiki?
In radio engineering, an antenna (plural: “antennas”) or aerial is the interface between radio waves propagating through space and electric currents moving in metal conductors, used with a transmitter or receiver.
What is antenna and how it works?
That’s more or less what an antenna (sometimes called an aerial) does: it’s the metal rod or dish that catches radio waves and turns them into electrical signals feeding into something like a radio or television or a telephone system. Antennas like this are sometimes called receivers.
What is the principle of antenna?
A transmitting antenna is one, which converts electrical signals into electromagnetic waves and radiates them. A receiving antenna is one, which converts electromagnetic waves from the received beam into electrical signals. In two-way communication, the same antenna can be used for both transmission and reception.
Who invented antenna?
The first antenna was devised by the German physicist Heinrich Hertz.
What are types of antennas?
Antenna Theory – Types of Antennas
| Type of antenna | Examples |
|---|---|
| Wire Antennas | Dipole antenna, Monopole antenna, Helix antenna, Loop antenna |
| Aperture Antennas | Waveguide (opening), Horn antenna |
| Reflector Antennas | Parabolic reflectors, Corner reflectors |
| Lens Antennas | Convex-plane, Concave-plane, Convex-convex, Concaveconcave lenses |
What are the properties of antenna?
Certain basic characteristics of antenna are listed below:
- Antenna Radiation Pattern.
- Radiation Intensity.
- Directivity and Gain.
- Radiation Efficiency and Power Gain.
- Input Impedance.
- Effective Length.
- Bandwidth.
- Effective Aperture.
Which are the four main types of antennas?
The dipole, monopole, array and large loop antenna types below typically function as resonant antennas; waves of current and voltage bounce back and forth between the ends, creating standing waves along the elements.
What are the parameters of antenna?
Typical parameters of antennas are gain, bandwidth, radiation pattern, beamwidth, polarization, and impedance. The antenna pattern is the response of the antenna to a plane wave incident from a given direction or the relative power density of the wave transmitted by the antenna in a given direction.
How many types of antenna are there?
There are three main antenna categories available for wireless LANs: Omnidirectional, Semidirectional and Highly directional. Omnidirectional – Omnidirectional antennas are designed to radiate a signal in all directions.
What is the history of antenna technology?
Multiple elements (a fed dipole, a director, and reflectors) were assembled in the 1920s to create narrow transmit and receive antenna patterns. The Yagi-Uda array, better known as the Yagi antenna, is still widely used. Edmond Bruce and Harald T. Friis developed directional antennas for shortwave and microwave frequencies during the 1930s.
How are antennas classified?
Antennas can be classified by operating principles or by their application. Wikimedia Commons has media related to Antennas.
Who owns antenna technologies?
Founded in 1998, the company was acquired by Pegasystems in 2013. Antenna’s core product was the Antenna Mobility Platform (AMP), which won the GSMA Global Mobile Award for Best Mobile Enterprise Solution at Mobile World Congress 2011 in Barcelona.
What is the best book on the history of antenna technology?
“Chapter 17: A History of Phased Array Antennas”. In Sarkar, Tapan K.; et al. (eds.). History of Wireless. John Wiley & Sons. pp. 567 –603. ISBN 978-0-471-71814-7. ^ Hugill, Peter J. (1999). Global Communications Since 1844: Geopolitics and Technology. Johns Hopkins University Press. p. 143. ISBN 978-0-8018-6039-3. ^ Douglas, Alan (1990).