The 13 papers in the special issue of information metamaterials and their radar applications published by Journal of Radars introduce the research progress of electromagnetic metamaterials from different levels and perspectives, and also reflect the latest research trends.

The 5 overview papers mainly introduced the research progress in several aspects, such as the design and application of reconfigurable multi-functional electromagnetic metasurfaces based on multiple information, optically controlled electromagnetic metamaterials, metamaterials based on intelligent algorithm and intelligent electromagnetic sensing.

The 8 research papers mainly reported that the High-performance microwave computational imaging methods and systems based on information metamaterials，DNN-based intelligent beamforming on a programmable metasurface, time domain Coding metasurface, time-varying polarization-converting programmable metasurface, electromagnetic absorbent metamaterials, controllable manipulation of Wi-Fi signals used tunable metasurface, and Research on a phased electromagnetic surface-based W-band radar system.