Hybrid Intelligent Reflective Surface for Low-Power Radar Detection

The intelligent reflective surface is divided into two distinct segments: active elements that provide amplification and passive elements that provide phase shifting only. This segmentation allows the system to achieve signal-to-noise ratio improvement through selective amplification while limiting power consumption by restricting active elements to only those positions where amplification is most beneficial, rather than deploying active elements across the entire surface.

Different regions of the intelligent reflective surface are assigned different functional qualities based on local propagation conditions. Active elements are strategically placed in regions where signal amplification provides the greatest benefit to the received signal-to-noise ratio, while passive elements are used in regions where only phase control is needed. This local differentiation optimizes the balance between power consumption and performance.

The system segments the reflective surface into active and passive elements, where active elements are strategically positioned to compensate for path loss in specific propagation paths. By placing amplification capabilities only where most needed, the system reduces overall power consumption compared to fully active systems while still mitigating path loss effects in critical signal paths.

Passive elements act as intermediaries that provide phase control and signal redirection without consuming power, while active elements serve as intermediaries that provide amplification only where necessary to overcome path loss. This intermediary approach allows the system to manage energy loss efficiently by combining the complementary strengths of both passive and active components.