Based on the avalanche multiplication effect of the avalanche transistor, a novel ultra-wideband (UWB) pulse generator has been designed. The UWB pulse technologies are described, and then different approaches for UWB pulse are analyzed and compared. The con- sidered pulse generation technologies are based on logic gates, Step-Recovery Diodes (SRD), and avalanche transistors. The basis of the proposed generator is a precision oscillator, an avalanche transistor, and an unique pulse-shaping circuit composed of the SRD and Schottky diode, which is used to reduce the pulse width and maintain the pulse amplitude high. Every component in the UWB pulse generator should be picked out, and the radio-frequency (RF) characteristics of the circuit must be considered. Finally, the UWB pulse generator with pulse duration of 356 ps, pulse amplitude of 3.1 V and ringing level of −15.9 dB has been simulated and fabricated. The measured result agrees with the simulation. Besides, the measured result is analyzed and the expectation is presented. With the features such as simple structure, stable performance and low cost, the proposed design is ideal for the UWB wireless communication system.