Two-Dimensional Barrage Jamming against SAR Using a Frequency Diverse Array Jammer.

Area of Science:

• Electronic Warfare
• Radar Systems Engineering
• Signal Processing

Background:

• Frequency Diverse Array (FDA) jammers can create multiple range-dimension point false targets against SAR.
• Existing research has focused on deception jamming using FDA jammers, with limited exploration of barrage jamming capabilities.
• Barrage jamming, which denies radar operation over a wide area, is a critical but underexplored application for FDA technology.

Purpose of the Study:

• To propose and validate a novel barrage jamming method against SAR utilizing an FDA jammer.
• To achieve a two-dimensional (2-D) barrage effect by combining stepped frequency offset and micro-motion modulation.
• To demonstrate the generation of flexible and controllable barrage jamming patterns.

Main Methods:

• Introduction of stepped frequency offset in the FDA jammer to generate range-dimensional barrage patches.
• Employment of micro-motion modulation to extend the barrage effect along the azimuth direction.
• Mathematical derivations and simulations to verify the proposed jamming strategy.

Main Results:

• The proposed method successfully generates range-dimensional barrage patches using stepped frequency offset.
• Micro-motion modulation effectively expands the barrage effect in the azimuth dimension, achieving a 2-D jamming area.
• Simulation results confirm the feasibility and controllability of the developed FDA-based barrage jamming technique.

Conclusions:

• The developed method offers a new approach for effective barrage jamming against SAR systems.
• The combination of FDA's stepped frequency offset and micro-motion modulation provides a flexible and controllable jamming solution.
• This research expands the application scope of FDA jammers in electronic warfare.