antenná

Antenná is a term often used as a misspelling or informal variant of "antenna," which refers to a device designed to transmit or receive electromagnetic waves. Antennas are crucial components in a wide range of electronic systems, enabling communication across various distances and frequencies. They are essentially conductive structures that interact with the electromagnetic field, converting electrical signals into radio waves for transmission or capturing radio waves and converting them back into electrical signals for reception.

The design of an antenna is highly dependent on its intended application. Factors such as frequency of operation, desired radiation pattern, polarization, and impedance matching all influence the physical shape and dimensions of an antenna. Common examples include dipole antennas, which are simple, straight conductors; parabolic antennas, used for highly directional transmission and reception; and loop antennas, which are closed conductive loops. Antennas are fundamental to technologies like radio broadcasting, television, mobile phones, Wi-Fi, radar, and satellite communication. Their ability to efficiently couple electrical energy to the electromagnetic field, and vice versa, is what makes modern wireless communication possible.