MIMO antenna array design for airborne down-looking 3D imaging SAR

Airborne down-looking three dimensional imaging SAR (ADL-3D-SAR) is a new radar system developed in recent years, which overcomes the shadowing effects and can gather more information compared to the conventional side looking SAR systems. However, it still has many constraints, e.g. antenna array configuration designing, cross-track resolution and vibration errors. In this paper, we focus on the designing of antenna configuration and propose several new multiple-input-multiple-output (MIMO) antenna array models which can provide more reasonable properties for 3D SAR system's stability, applicability, and vibration errors reduction. The validity of these models is discussed in the end.