What is a multiband dipole antenna?
Multiband dipole antenna, also called doublet or half wave dipole, is a radio antenna electrically conductive bars or wires, which is half the wavelength long. The distribution in the center with the insulator is connected to the transmission pipe, which has a radiation formula with a maximum at right angles to the antenna. The dipole means "two poles" and is usually the simplest type of antenna, such as the well -known "rabbit ears" on television. Multiband concerns radio communication across frequencies reserved for use, such as air groups, public services, seabel group and civic group, television and commercial radio broadcasts. Short -heading radio enthusiasts often build their own vertical or hanging antennas. These antennas allow users to listen to air waves around the world with accurate intake and stereo abilities and cover a wide range of frequencies. Public agencies similar to the fact that police or firefighters work on their own dedicated frequencies, but in integrated operations where it is necessary toOmunikation between agencies, multiband technology provides better coordination between departments.
Dipo antennas are usually movable to adapt to changing local conditions. The well-known set-top TV antenna can be modified in length and angle. Larger dipole antennas made of wire are suspended in V -shaped, while shorter are suspended vertically. The folded dipole antenna is folded back almost to the supply point and the short -wave dipole antenna can be inverted over the tree branches for portability. Scanners and radios that use multiband dipole antennas, sometimes have external connectors for adding fitness antennas; Digital displays of digital tuning and liquid crystals (LCD) can be used to indicate the frequency of a selected station or broadcast.
In addition to accessing official transismissions, Multiband Technology also allow users to pick up entertainment and weather scanning, nouzové broadcasts of the first reacting and civic group. Typical multiband radio can be able to scan dozens of channels per second and 100 or more total channels. These antennas can appear on analog or digital devices, for home, office, travel, hand -creamy standby and units with global location technology. Military radio operators can carry several dipole antennas with multi -bibandmi to access different frequencies; These can be shortened to the length of the required communication zone, such as frequencies used by medical evacuation, clean control stations or tactical stations. The efficiency of the receiver for multi -bank depends on the performance of the antenna.