Provided by: EMW Publishing
Date Added: Jan 2011
A WiMedia compliant CMOS RF Power Amplifier (PA) for Ultra-WideBand (UWB) transmitter in the 3.1 to 4.8GHz band is presented in this paper. The proposed two-stage PA employs a cascode topology on the first stage as driver while the second stage is a simple Common Source (CS) amplifier. In order to improve the efficiency and output power, the output impedance of the driver amplifier (first stage) is optimized so that it falls on the source-pull contours of the second stage amplifier.