Time-domain measurement system using Track & Hold Amplifier applied to pulsed RF characterization of high power GaN devices

Summary form only given, as follows. This paper proposes a time-domain test bench for the pulsed characterization of a high Power GaN Amplifier. Our findings are based on a Track and Hold Amplifier for the down-conversion of RF spectra using the sub harmonic sampling principle. The use of wideband THA to replace samplers or mixers enables reducing component density in an analog domain. It permits direct digitization of entire pulsed RF spectrum, bringing more flexibility in the receiver´s performance by enhancing the bandwidth.