This article discusses ways to optimize the range of low-power wireless systems while complying with Federal Communications Commission (FCC) regulations on devices classified as general purpose single-channel radios in the unlicensed ISM band (915 MHz or 2.4 GHz). For these devices, the output power of the fundamental frequency shall not exceed –1.25 dBm. It presents the basic considerations in calculating the expected range of wireless links and methods of improving the range. It also covers how to extend the system's range while keeping a focus on low-power and battery-powered applications.
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About the Author
Thomas Almholt is senior RF applications engineer for Texas Instruments Low-Power RF group. He has extensive experience as the technical lead for RF system validation of multiple fully-integrated, GSM/EDGE-compliant devices. Thomas received his Master's Degree in RF Systems and Telecommunications engineering from the University of Aalborg in Denmark.