Generation of ultrawideband picosecond impulses with fast fall‐time

A method to generate ultrawideband picosecond impulses with fast fall-time is presented. This impulse generator is based on a broadband bipolar transistor and a nonlinear transmission line comb generator. The transistor works in fast switch-on mode and emits impulses with steep leading edges, which are further compressed by the comb generator. The experimental short impulses of 725 ps duration and 180 ps fall-time were generated with output harmonic up to 10 GHz. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2165–2167, 2014