Single-Feed Beam-Steering of Short Pulses via Time Reversal

In this letter, we present a new approach to beam-steering of short, ultrawideband (UWB) pulses using a single-feed radiating structure. Utilizing a radiator consisting of small apertures backed by a reverberating cavity, a time-reversal technique is applied to generate a short pulse at each aperture with the corresponding time delay for beamforming at a desired steering angle. In the process, we also employ a novel method to improve beamforming performance. This approach offers significantly simpler beamforming and steering of short pulses compared to conventional methods, which typically require a complex multifeed structure. Moreover, beam-steering of high-power short pulses is achievable using this approach with a suitable choice of feed.