The resonance effect of a wire in response to transient waves

A resonance effect of transient fields on thin conducting wires is observed and analyzed. The resonant response essentially depends on the matching of the spectrum of the incident pulse with the characteristic spectrum of the wire. It has been found, accordingly, that a one-cycle sine waveform with appropriate time interval can excite resonant responses in backscatter, bistatic, and specular scattering. The responding waveform can be well interpreted by the concept of a travelling wave. It gives insight into the resonance phenomenon, showing that the pulse illuminating the wire excites very strong surface waves at resonance. The resonant time interval of the sine waveform is determined by the wire length and the angle between the incident direction and the wire axis; it becomes narrower as the angle gets closer to the wire axis.<>