Single-shot and single pixel measurement of 3D radiation pattern

Accurate characterization of antenna radiation patterns typically requires point-by-point scanning in anechoic chambers equipped with robotic arms and precision positioning systems. These traditional approaches are inherently time-consuming, expensive, and spatially constrained. In this work, we provide an experimental demonstration of a novel method (originally presented in [1]) for real-time three-dimensional (3D) radiation pattern measurement. The method is based on passive spatial sampling and hardware compressive sensing within a rich scattering medium. Unlike conventional techniques that suppress reflections, the proposed approach harnesses multiple wave reflections in a chaotic cavity to encode spatial-temporal information, thereby enabling a single-shot acquisition of both spatial and spectral field distributions. This paper introduces the proposed methodology and reports preliminary results.