A Wideband Envelope Tracking Solution for WLAN Systems

Envelope tracking (ET) has become popular for enhancing battery life in mobile communication devices that employ high peak-to-average power ratio (PAPR) signals. Most of the published ET systems have focused on narrow-bandwidth cellular standards. However, as the demand for higher bandwidths and data rates increases, so does the need for wideband ET solutions. This presentation will cover the design details of a fully integrated, reconfigurable WLAN ET system with digital baseband ina 28nm CMOS technology for bandwidths up to 40MHz. The ET modulator directly interfaces with a battery and is fully integrated within a complete WLAN transceiver.