A circuit implementation for time-reversal of short impulses

In this paper, a practical circuit is designed to time reverse very short impulses. The proposed circuit obtains the impulse´s discrete spectrum first; then accomplishes time-reversal in the frequency domain; and finally synthesizes the output using discrete continuous wave elements. This circuit consists of practical and commercially available components and is easy to implement. Its performance is demonstrated by advanced design system (ADS) simulation, with time-reversal of a 1.4-ns-wide impulse in noisy environments as an example.