This Special Issue solicits original research and review articles on recent advances in the development of novel electromagnetic structures for sensing applications. Electromagnetic structures such as antennas, frequency selective surfaces, electromagnetic band gaps, and split ring resonators can function as sensors when their properties can be engineered to react to external stimuli, including physical, chemical, and biological stimuli. High sensing resolution often necessitates the use of electromagnetic waves of short wavelength. Thus, these structures tend to be designed for operating at the high frequency end of the spectrum ranging from microwaves to optical frequencies. These same structures can also perform or enhance the non-sensing function in sensors such as signal transmission and reception for radar and wireless sensors.

Topics of interest include but are not limited to:
- Microwave/millimeter-wave antennas and arrays for sensing applications;
- Optical frequency antennas and arrays for sensing applications;
- Frequency selective surfaces for sensing applications;
- Electromagnetic band gaps for sensing applications;
- Split ring resonators for sensing applications.

The applications of interest include but not limited to:
- Human physiological sensing;
- Structural health monitoring;
- Crop health monitoring;
-Food safety analysis;
- Medical imaging.

Manuscripts can be submitted until 31 July 2021. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website.