Dynamically tunable electromagnetic stealth surface

Electromagnetic stealth surface has important applications in the fields of radar, military communication, etc. First, we have introduced the recent progress about in-band transmission and out-of-band reflection stealth surface, in-band transmission/absorption stealth surface, and electromagnetic sensing stealth metasurface. Then a dynamically tunable electromagnetic stealth surface is proposed, whose pass band can be switched on/off by using PIN diodes. When the diodes are OFF, there is a narrow transmission band around 11.34 GHz and broad absorption band at 4.8−11 GHz and 13.5−16 GHz. When the diode is ON, the narrow transmission band is switched OFF, while the absorption band is almost unchanged. This work has a great prospect in the field of modern military radar.