Antenna farm or satellite dish farm or just dish farm are terms used to describe an area dedicated to television or radio telecommunications transmitting or receiving antenna equipment, such as C, Ku or Ka band satellite dish antennas, UHF/VHF/AM/FM transmitter towers or mobile cell towers. The history of the term "antenna farm" is uncertain, but it dates to at least the 1950s. In telecom circles, any area with more than three antennas could be referred to as an antenna farm. In the case of an AM broadcasting station (mediumwave and longwave, occasionally shortwave), the multiple mast radiators may all be part of an antenna system for a single station, while for VHF and UHF the site may be under joint management. Alternatively, a single tower with many separate antennas is often called a "candelabra tower". Safety and security Commercial antenna farms are managed by radio stations, television stations, satellite teleports or military organizations and are mostly very secure facilities with access limited to broadcast engineers, RF engineers or maintenance technicians. This is not only for the physical security of the location (including preventing equipment/metal theft), but also for safety, as there may be a radiation (closer to daylight or radiant heat in energy level, much less disruptive to cellular activity than emissions from radioactive elements or x-ray machines) hazard unless stations are powered-down. Locations Where terrain and road access allows, mountaintop sites are very attractive for non-AM broadcast stations and others, because it increases the stations' height above average terrain, allowing them to reach further by avoiding obstructions on the ground, and by increasing the radio horizon. With a clearer line of sight in both cases, more signal can be received. While the same is true of a very tall tower, like Paris’ Eiffel tower, such towers are expensive, dangerous, and difficult to access the top of, and may collect and drop large amounts of ice in winter, or even collapse in a severe ice storm and/or high winds. Multiple small towers also allow stations to have backup facilities co-located on each other's towers for redundancy. Satellite antenna farms are usually located at remote locations, far away from urban development, especially high rise buildings or airplane flight paths, to avoid and minimize disruption to transmission and reception, and so as to not be an eyesore. Although most radio and TV stations are in fierce competition with each other in their