Independent dual-beam control based on programmable coding metasurface

Field-programmable beam reconfiguring based on digitally-controlled coding metasurface

Digital phase shifters have been applied in traditional phased array antennas to realize beam steering. However, the phase shifter deals with the phase of the induced current; hence, it has to be in the path of each element of the antenna array, making the phased array antennas very expensive. Metamaterials and/or metasurfaces enable the direct modulation of electromagnetic waves by designing s...

Dynamical beam manipulation based on 2-bit digitally-controlled coding metasurface

Recently, a concept of digital metamaterials has been proposed to manipulate field distribution through proper spatial mixtures of digital metamaterial bits. Here, we present a design of 2-bit digitally-controlled coding metasurface that can effectively modulate the scattered electromagnetic wave and realize different far-field beams. Each meta-atom of this metasurface integrates two pin diodes...

A programmable metasurface with dynamic polarization, scattering and focusing control

Diverse electromagnetic (EM) responses of a programmable metasurface with a relatively large scale have been investigated, where multiple functionalities are obtained on the same surface. The unit cell in the metasurface is integrated with one PIN diode, and thus a binary coded phase is realized for a single polarization. Exploiting this anisotropic characteristic, reconfigurable polarization c...

Dynamic metasurface lens based on MEMS technology

Model Based Programmable Control Logic Design

The paper presents a methodology of designing control logic that is implemented by industrial programmable logic controllers. The approach is based on discrete-event model of a plant to be controlled and a set of interlock and sequential specification models. Supervisory control theory is used to test the controllability of the specifications and in the final stage, to derive a model of the adm...