Kalim, Danish; Erkens, Holger; Wunderlich, Ralf; Heinen, Stefan (Chair of Integrated Analog Circuits, RWTH Aachen University, Aachen, Germany)
Kalim, Danish; Negra, Renato (Mixed Signal CMOS Circuits, UMIC Research Centre, RWTH Aachen University, Aachen, Germany)
Switching-mode power amplifiers are used in applications where linearity is not critical and efficiency is the utmost priority e.g. phased arrays. This paper presents the design of a differential class-E amplifier for a phased array radar application in 0.25 µm SiGe BiCMOS technology. The operating frequency range is 2.9GHz to 3.1GHz with center frequency at 3 GHz. The design approach of the amplifier which includes damping circuit, shunt charging capacitor and balun will be described. Simulations of the design predict an output power and PAE of 25.8dBm and 49% respectively. The output stage is biased with a 3.3V at the collector.