Demonstrated By: Various photonics and RF labs
What Happens:
Metamaterials or dielectric objects are engineered to resonate at specific EM frequencies, enhancing interaction with the field. When exposed to the right frequency, these materials exhibit unique behaviors — absorbing, reflecting, or trapping EM waves in predictable patterns.

Relevance:
You could design vehicle “skins” or undercarriages to resonate selectively at specific atmospheric frequencies, making them interact only with certain “lanes” of the electromagnetic sky grid.