Multi-frequency amplitude-programmable metasurface for multi-channel electromagnetic controls

Abstract The digital and programmable metasurfaces, as opposed to conventional offer a more sophisticated method of collaborating information physics, showcasing several real-time controls electromagnetic (EM) ways in succinct ways. In this work, we propose multi-frequency amplitude-programmable (MFAP) metasurface with multiple frequency channels enhance the presentation manipulation EM data. With metasurface, reflected amplitudes can be simultaneously independently encoded between high (digit “1”) low “0”) levels. amplitude code is unique, which exhibits both reflection coefficients radiation patterns allow for flexible multi-functional operations frequency. For instance, MFAP used design innovative communication systems by transmitting various signals individually across time domain. It also possible carry out multi-bit transmissions mixing these channels. By introducing complex coding space domain, it manipulate powers greater precision. A square-split ring meta-atom that achieve stable single-frequency control 1 bit features described proof-of-concept. Varactors loaded on metallic structures sizes are switched operating states modify codes at each channel. suggested metasurface’s validity confirmed simulations measurements from dual-channel prototype.