研究目的
To model and analyze the scattering of a short pulse plane wave on a small metal sphere, focusing on the dipole component of the scattered field and deriving a closed-form solution for the convolution operator that relates the induced dipole moment to the incident electric field waveform.
研究成果
Closed-form expressions for the convolution operators describing the polarizability of a metal sphere were derived, showing both finite impulse response (FIR) and infinite impulse response (IIR) parts. These operators can be safely and efficiently used in time domain discrete dipole modeling without causing late time instability. The findings have potential applications in RCS calibration objects, pattern correcting and matching lenses for antenna applications, and simulating short range pulse timed array radar.
研究不足
The study focuses on small spheres compared to the signal duration, limiting the analysis to the dipole component of the scattered field. The approach may not be applicable to larger spheres or more complex scattering scenarios.
