A review of metamaterial absorbers and their application in sensors and radar cross-section reduction

In the past few decades, metamaterial absorbers (MA) have become an important area of research due to their potential application as ultrathin perfect absorbers. There are various approaches proposed in the literature to obtain multiband and broadband absorption characteristics. This paper presents all the different approaches followed by different authors along with their respective drawbacks and advantages. Metamaterial absorbers have numerous applications in today's technological advancement. This paper presents the review of literature on previously proposed MA applied for radar cross-section reduction and used as sensors in several applications. The aim is to help the user choose a suitable approach for particular specifications and also develop new devices in the future.