Design principle of single- or double-layer wave-absorbers containing left-handed materials

The physical models of single- or double-layer microwave absorbers containing left-handed materials as well as their corresponding design principles and methods are proposed. The theoretically derived calculation formulae that may be used in the design procedures are also presented. Finally, a design example is given. The results obtained may be useful to the researchers and designers working in the area of microwave absorber theory, technology and engineering.