Publisher Summary It is the receiver that ultimately determines the performance of the short-range radio link. Given a particular transmitter power, which is limited by the regulations, the range of the link depends on the sensitivity of the receiver, which is not legally constrained. This chapter reviews various topologies that have been developed for different performance levels and applications. While the superheterodyne receiver is dominant, the simplicity and low cost, as well as low power consumption, of tuned radio frequency and superregenerative receivers can be taken advantage of for very short-range applications—up to several meters. Digital, or software, radios are also introduced in anticipation of their adoption for short-range applications in the future. The chapter describes how repeaters can be used to extend the range of low-power license-flee communication links.