Dear IEEE JETCAS Readers,
The IEEE Journal on Emerging and Selected Topics in Circuits and Systems (JETCAS) proudly published its 2020 March issue to present a comprehensive perspective on the state of research in the field of programmable metamaterials. This issue begins with an overview paper by the guest editors that provides a tutorial on programmable metamaterials and surveys research lines from the metamaterial architecture, circuits, and technology standpoints. It is complemented by a total of 11 high-quality, novel contributions, touching upon (1) experimental prototypes with various functionalities, (2) cross-cutting issues of programmable metasurface design, and (3) the modeling of metamaterials. We hope you enjoy the contents of this special issue!
An-Yeu (Andy) Wu (Editor-in-Chief)
Ho Ching (Herbert) Iu (Associate Editor-in-Chief)
Wen-Hsiao Peng (Associate Editor-in-Chief for Digital Communications)