Propagation and mismatch analysis of 50 GHz guided pulses based on optical sampling

We present a method to explore propagation behavior and mismatch characteristics of 50 GHz pulses using a pulsed optical sampling technique. The system employs a minute, external crystal sensor that is suitable for ultrabroad band sensing - even up to the THz regime. The external scheme of the sensor enables fast pulse detection at arbitrary points over a transmission line. In this paper, the propagating incident pulse and its reflected responses from standard mismatch loads are measured at various locations of a microstrip transmission line. In addition, the evolution of the pulses and their spectral responses are also discussed.