A 27dBm, SiGe-BiCMOS transmitter with 62% PAE and operation class control for large-bandwidth polar modulation and pulse-width modulated signals

This paper presents a SiGe BiCMOS transmitter for large bandwidth Polar Modulation and PWM signals. For flexibility, the transmitter presented in the paper has an externally controllable class of operation. Fabricated in a SiGe BiCMOS process (QUBIC4G), the measured saturated output power of the transmitter is 27 dBm and the measured PAE is 62%. It features an IMD3 of -30 dBc up to 25 dBm peak envelope power and fulfills the spectral mask for WLAN 802.11.a signals.