Sum and difference beams are two kinds of field patterns, which have been commonly used in monopulse radar systems for detecting and tracking targets. This letter proposes to synthesize sum and difference beams based on a binary programmable metasurface (BPM). Moreover, the sum and difference beams can be steered by reprogramming digital coding schemes of the BPM. A prototype of the BPM is designed and tested at the Ka-band. Both simulations and experiments validate the presented functions of beam shaping and beam steering.

中文翻译：

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基于二元可编程超表面的可重构总和与差分光束

总和和不同波束是两种场模式，通常在单脉冲雷达系统中用于检测和跟踪目标。这封信建议基于二进制可编程超表面（BPM）合成和光束和差光束。此外，可以通过对BPM的数字编码方案进行重新编程来控制总和和差波束。BPM的原型是在Ka频段设计和测试的。仿真和实验都验证了所提出的光束整形和光束转向功能。