influencing the time-responses in transceiver terminals:
driving pulses and echo signals. These interactions are
neglected, or are only considered in a simplified way, in
conventional modelling approaches.
In this paper, the origin and effects of these non-linear
influences from electronics will be analysed by using new
alternatives for time-simulation. Previous simplified
approaches are improved by using more accurate circuital descriptions, specially indicated for the highfrequency range. Equivalent circuits are proposed for
the whole pulse-echo configuration, including nonconventional and parasitic influences of the electronic
stages, and used to simulate transceiver responses in
NDE schemes. Relative effects on emission and reception responses are analysed, by comparing alternative
simulation results and also experimental data.