Active Cloaking Without A Priori Incident Field Knowledge

Active scattering-cancellation cloaking employs an array of antennas to cancel out an object's scattering. Although promising in terms of versatility and performance, the past dependence on a priori knowledge of the incident field represents a major barrier to practical implementation. This work addresses this obstacle by presenting the initial development of a field estimator, enabling determination of the incident field from total field measurements near the target. Accordingly, simulated total field values are used to configure a cloak to hide a quasi-2D, conductive, circular target against impinging plane waves of various amplitudes and directions. Scattering cross-section simulations validate good performance matching between estimator based and known field cloak configurations.