What can I find at radiocommunication and broadcasting installations?
At radiocommunication and broadcasting installations, you will generally find transmitters, transmission lines, antennas and their supporting structures. Radiocommunication and broadcasting transmitters are electronic devices that generate radio frequency (RF) signals which carry the information intended for receivers. The signals are transmitted by antennas, and after propagating through space, are picked up by receivers (via receive antennas) which then extract the information carried, be it a cell phone conversation, or a TV show. Antennas are the apparatus which transmit the RF energy. They are often located on top of a tower or other supporting structure. Occasionally a tower will be used as an antenna, but rarely and only with certain services such as AM broadcasting. As RF energy propagates away from the transmitting antenna, the RF power density (power per unit area, another way of expressing the RF signal strength, see Question #1) decreases very rapidly.
At radiocommunication and broadcasting installations, you will generally find radio transmitters and receivers, transmission lines and antennas, as well as their supporting structures. Radiocommunication and broadcasting transmitters are electronic devices that generate RF signals which carry the information intended for receivers. The signals are transmitted by antennas and then picked up by receivers (via receive antennas), which then extract the information carried, be it a cell phone conversation or a television program. Antennas are often located on top of a tower or other supporting structure, such as a building or water tower. Occasionally, the tower itself will be used as an antenna, but rarely and only with certain services such as AM broadcasting. As RF energy moves away from the transmitting antenna, the RF power density (see Question 1) decreases very rapidly.
Related Questions
- How does Industry Canada ensure that radiocommunication and broadcasting installations respect its regulatory limits for the protection of the public from radiofrequency (RF) energy?
- Who inspects or audits radiocommunication and broadcasting installations to ensure compliance with Industry Canada’s regulatory limits?
- Who inspects or audits radiocommunication and broadcasting installations to ensure compliance?
