Amplitude Modulation (AM) has several applications in various fields. Here are some of the key applications of AM:
Broadcast Radio: AM is widely used for broadcasting radio signals. In AM radio broadcasting, audio signals are modulated onto a carrier wave by varying its amplitude. The modulated signal is then transmitted through the air and received by radio receivers, which demodulate the signal to retrieve the original audio content. AM radio is commonly used for long-distance communication and is utilized by numerous radio stations worldwide.
Citizen Band (CB) Radio: AM is also employed in Citizen Band radio communications. CB radios operate on specific frequencies within the AM band and are used for short-range communication in various applications such as personal and professional use, trucking, and emergency services.
Two-Way Radio Communication: AM modulation finds applications in two-way radio systems, including aviation communication, marine communication, and amateur radio. It allows voice communication over relatively long distances.
Radio Navigation Systems: Some radio navigation systems, such as Non-Directional Beacons (NDB), use AM modulation. NDBs transmit a carrier wave modulated with a unique identification signal, allowing aircraft and ships to navigate by receiving and interpreting the signal.
Analog Television: AM modulation has been historically used in analog television broadcasting. Video and audio signals are combined and modulated onto a carrier wave using AM. However, analog television systems have largely been replaced by digital television.
RFID (Radio Frequency Identification): AM modulation is utilized in certain types of RFID systems, particularly those operating in the LF (Low Frequency) and HF (High Frequency) ranges. AM is used to transmit data between RFID tags and readers.
Wireless Microphones: AM modulation is sometimes employed in wireless microphone systems, where the audio signal is modulated onto a carrier wave for wireless transmission to a receiver.
These are just a few examples of the applications of Amplitude Modulation. AM modulation is a fundamental technique in wireless communication and broadcasting, and its usage extends beyond the mentioned applications.