AbstractU+2014This paper presents a 0.13 µm CMOS Class-E PA with 20.5 dBm maximum output power and 52.5% PAE. The PA covers a wide dynamic range from 1.5 dBm to 20.5 dBm. A novel configurable switch is applied for both ranging and communication. The measured fast rise time for ranging is merely 4.5 ns while the slow rise/fall time for communication is 90 ns, which allows a maximum data rate for return-to-zero BPSK modulation of 4 Mbps.