Abstract-A short range 3.1 -10.6 GHz single band ultrawideband (UWB) pulse radar system is presented. The transmitter consists of a pulse generator that is connected to a broadband monopole antenna. The generated pulse shape is similar to the fifth derivative of the Gaussian bell shape and makes efficient use of the allocated FCC UWB frequency mask. The receiver is realized with a single-ended low noise amplifier and active single-ended to differential converters that drive the input ports of an analog correlator which uses pulse sequences as template signals. Measurements show a resolution capability of the radar system in the millimeter range. All active circuits have been realized in a low cost 0.8 µm SiGe HBT technology.