915MHz

915 MHz refers to a specific radio frequency within the ultra-high frequency (UHF) portion of the radio spectrum. This frequency band is part of the ISM (Industrial, Scientific, and Medical) radio bands, which are allocated for unlicensed use by devices in these categories, as well as for telecommunications. The 915 MHz band is particularly significant in North America and parts of South America due to its allocation within the ISM band.

Devices operating at 915 MHz often utilize spread-spectrum modulation techniques, such as frequency hopping or direct-sequence spread spectrum. These techniques help to mitigate interference and improve the robustness of wireless communication. The relatively low frequency of 915 MHz allows for good propagation characteristics, meaning signals can travel considerable distances and penetrate obstacles like walls more effectively compared to higher frequencies. This makes it suitable for applications requiring broader coverage or operation indoors.

Common applications for devices operating in the 915 MHz band include wireless sensor networks, RFID (Radio-Frequency Identification) systems, automated meter reading (AMR) systems, and various short-range wireless communication devices. In the United States, this frequency falls within the 902-928 MHz range of the ISM band, which is also utilized by certain cellular technologies and other wireless services. The unlicensed nature of the ISM band allows for widespread adoption and innovation in wireless technologies without the need for expensive spectrum licensing.