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What is an antenna? | Antenna store

An antenna is a transducer that converts radiofrequency (RF) fields into alternating current or vice versa. There are two receive and transmit antennas to send or receive radio transmissions. Antennas play an important role in the operation of all radio equipment. They are used in wireless local area networks, mobile telephony and satellite communication.


What are the antennas for? | Antenna store

The antennas have a metallic conductor arrangement with an electrical connection to the receivers or transmitters. The current is forced through these conductors by radio transmitters to create alternating magnetic fields. These fields induce voltage at the terminals of the antenna, which are connected to the receiver’s input. In the far field, the oscillating magnetic field is coupled with a similar oscillating electric field, which defines the electromagnetic waves capable of propagating the signal for long distances.

Radio waves are electromagnetic waves that carry signals through the air at the speed of light without any loss of transmission. The antennas can be omnidirectional, directional or arbitrary.

Types of Antennas | Antennas Store

Linear antennas

Omni-directional antennas
Those antennas that radiate uniformly in a certain plane (usually in the horizontal plane), in which the radiation pattern is a circle, are omnidirectional.

Elemental dipole
It is a dipole antenna with a length much shorter than the wavelength and in which the current is constant.

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