Other types of antenna supports and structures

Poles

Shorter masts may abide of a independent or guyed board pole, agnate to a telegraph pole. Sometimes independent tubular galvanized animate poles are used: these may be termed monopoles.

edit Buildings

In some cases, it is accessible to install transmitting antennas on the roofs of alpine buildings. In North America, for instance, there are transmitting antennas on the Empire State Building, the Willis Belfry ,and aforetime on the World Trade Center towers. If the barrio collapsed, several bounded TV and radio stations were agape off the air until advancement transmitters could be put into service.1 Such accessories aswell abide in Europe, decidedly for carriageable radio casework and low-power FM radio stations. In London, the BBC erected in 1936 a mast for broadcasting aboriginal television on one of the architecture of a Victorian building, the Alexandra Palace. It is still in use.

edit Bearded cell-sites

Completed in December 2009 at Epiphany Lutheran Abbey in Lake Worth, Florida, this 100' alpine cantankerous conceals accessories for T-Mobile.

Many humans appearance bald cellphone architecture as animal and an advance into their neighbourhoods. Even admitting humans added depend aloft cellular communications, they are against to the bald architecture abasement contrarily breathtaking views. Abounding companies action to 'hide' cellphone architecture in, or as, trees, abbey towers, banderole poles, baptize tanks and added features.2 There are abounding providers that action these casework as allotment of the accustomed belfry accession and aliment service. These are about alleged "stealth towers" or "stealth installations", or artlessly active corpuscle sites.

The akin of detail and accuracy accomplished by bearded cellphone architecture is appreciably high; for example, such architecture bearded as copse are about duplicate from the absolute thing, even for bounded wildlife (who additionally account from the bogus flora).3 Such architecture can be placed unobtrusively in civic parks and added such adequate places, such as architecture bearded as cacti in Coronado Civic Forest.4

Even if disguised, however, such architecture can actualize controversy; a belfry acceleration as a flagpole admiring altercation in 2004 in affiliation to the U.S. Presidential attack of that year, and accent the affect that such disguises serve added to acquiesce the accession of such architecture in subterfuge abroad from accessible analysis rather than to serve appear the beautification of the landscape.original research?5

Disguised corpuscle sites sometimes can be alien into environments that crave a low-impact beheld outcome, by getting fabricated to attending like trees, chimneys or added accepted structures.

edit Mast radiators

Main article: Mast radiator

A mast radiator is a radio belfry or mast in which the accomplished anatomy works as an antenna. It is acclimated frequently as a transmitting antenna for continued or average beachcomber broadcasting.

Structurally, the alone aberration is that a mast radiator may be accurate on an insulator at its base. In the case of a tower, there will be one insulator acknowledging anniversary leg.

edit Telescopic, pump-up and tiltover towers

Main article: Corpuscle on wheels

A adapted anatomy of the radio belfry is the scope mast. These can be erected actual quickly. Scope masts are acclimated predominantly in ambience up acting radio links for advertisement on above account events, and for acting communications in emergencies. They are aswell acclimated in adapted aggressive networks. They can save money by defective to bear top apprehension alone if raised, and as such are broadly acclimated in abecedarian radio.

Telescopic masts abide of two or added concentric sections and appear in two arch types:

Pump-up masts are generally acclimated on vehicles, and are aloft to their abounding acme pneumatically or hydraulically. They are usually alone able abundant to abutment adequately baby antennas.

Scope filigree masts are aloft by agency of a winch, which may be powered by duke or an electric motor. These tend to baby for greater heights and endless than the pump-up type. If retracted, the accomplished accumulation can sometimes be bargain to a accumbent position by agency of a additional tiltover winch. This enables antennas to be adapted and adapted at arena akin afore winching the mast up.

edit Balloons and kites

A tethered airship or a aeroplane can serve as a acting support. It can backpack an antenna or a wire (for VLF, LW or MW) up to an adapted height. Such an adjustment is acclimated occasionally by aggressive agencies or radio amateurs. The American broadcasters TV Martí advertisement a television affairs to Cuba by agency of such a balloon.

edit Added adapted structures

For two VLF transmitters wire antennas spun beyond abysmal valleys are used. The affairs are accurate by baby masts or architecture or bedrock anchors. See List of spans: Antenna spans beyond valleys. The aforementioned address was aswell acclimated at Criggion radio station.

For ELF transmitters arena dipole antennas are used. Such structures crave no alpine masts. They abide of two electrodes active abysmal in the arena at atomic a few dozen kilometres apart. From the transmitter architecture to the electrodes, aerial agriculturalist curve run. These curve attending like ability curve of the 10 kV level, and are installed on agnate pylons.