Antenna

An antenna is a telecommunications device that converts electrical signals to electromagnetic waves when transmitting converting electromagnetic waves into electrical signals when receiving. The received signals are broadcast in two frequency bands: UHF in the frequency range of 470 to 869 MHz and VHF in the frequency range of 170 to 230 MHz. The boundaries of each group may vary slightly across different countries. In mountainous areas or locations with obstacles and tall buildings, it is preferable to use antennas with both VHF and UHF frequency bands. Television antennas are manufactured in two types in terms of placement: indoor antennas (INDOOR) and outdoor antennas (OUTDOOR). Outdoor antennas are installed on the roof or terrace or any suitable point outside the house, while indoor antennas are installed inside the home near the television, on a table, wall, or next to the window (usually places that are not blind spots) and the advantages of indoor antennas are small size, freedom of movement and the absence of the need for cabling from the rooftop. Antennas are produced in two types: ACTIVE and PASSIVE antennas. ACTIVE re equipped with electronic circuits and transistor amplifiers that boost the received signal and direct it to the receiver via a cable. ACTIVE antennas are usually used in areas with weak signal reception. On the other hand, PASSIVE antennas have a simpler design, are more affordable, and are typically used in areas where signal reception is strong.