ARRT-Antenna
Encyclopedia
An ARRT-Antenna is the designation of a common type used on many AM broadcasting
sites in former Soviet Union
, Bulgaria
and Albania
. It consists of a cage antenna which is mounted around the lower parts of a mast radiator
insulated against ground and insulated from the mast. The mast and the cage antenna are fed separately.
The ARRT-antenna allows a radiation pattern
with less skywave
radio propagation
and is easier realizeable than a mast divided by insulator
s.
A variant of ARRT-antennas uses a grounded mast and a cage antenna reaching from the bottom to the top of the mast. Such antennas are used e.g. at the mediumwave
masts of Bolshakovo
transmitter.
Broadcasting
Broadcasting is the distribution of audio and video content to a dispersed audience via any audio visual medium. Receiving parties may include the general public or a relatively large subset of thereof...
sites in former Soviet Union
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....
, Bulgaria
Bulgaria
Bulgaria , officially the Republic of Bulgaria , is a parliamentary democracy within a unitary constitutional republic in Southeast Europe. The country borders Romania to the north, Serbia and Macedonia to the west, Greece and Turkey to the south, as well as the Black Sea to the east...
and Albania
Albania
Albania , officially known as the Republic of Albania , is a country in Southeastern Europe, in the Balkans region. It is bordered by Montenegro to the northwest, Kosovo to the northeast, the Republic of Macedonia to the east and Greece to the south and southeast. It has a coast on the Adriatic Sea...
. It consists of a cage antenna which is mounted around the lower parts of a mast radiator
Mast radiator
A mast radiator is a radio mast or tower in which the whole structure itself functions as an antenna. This design is commonly used for transmitting antennas operating at low frequencies, in the VLF, LF and MF ranges, in particular those used for AM broadcasting. The metal mast is electrically...
insulated against ground and insulated from the mast. The mast and the cage antenna are fed separately.
The ARRT-antenna allows a radiation pattern
Radiation pattern
In the field of antenna design the term radiation pattern most commonly refers to the directional dependence of the strength of the radio waves from the antenna or other source ....
with less skywave
Skywave
Skywave is the propagation of electromagnetic waves bent back to the Earth's surface by the ionosphere. As a result of skywave propagation, a broadcast signal from a distant AM broadcasting station at night, or from a shortwave radio station can sometimes be heard as clearly as local...
radio propagation
Radio propagation
Radio propagation is the behavior of radio waves when they are transmitted, or propagated from one point on the Earth to another, or into various parts of the atmosphere...
and is easier realizeable than a mast divided by insulator
Insulator
Insulator may refer to:* Insulator , a substance that resists the flow of electric current* Insulator , an element in the genetic code* Thermal insulation, a material used to resist the flow of heat...
s.
A variant of ARRT-antennas uses a grounded mast and a cage antenna reaching from the bottom to the top of the mast. Such antennas are used e.g. at the mediumwave
Mediumwave
Medium wave is the part of the medium frequency radio band used mainly for AM radio broadcasting. For Europe the MW band ranges from 526.5 kHz to 1606.5 kHz...
masts of Bolshakovo
Bolshakovo
Bolshakovo , also referred to as Bolshakovo-Novoye ; until 1938—Groß Skaisgirren, from 1938 to 1946—Kreuzingen) is a settlement located in the southern part of Slavsky District of Kaliningrad Oblast, Russia, 90 km from Kaliningrad...
transmitter.