Table 1: Compositions and maximum absorbing properties of the developed nanocomposites.

Sample codeComposition (30% filler)minimum return loss (−dB)Frequency (GHz)Matching thickness (mm)

Sample-1Cu-NZF29.858.793
Sample-2Cu-NZF/PZT (3 : 1)43.828.953
Sample-3Cu-NZF/PZT (1 : 1)49.538.443
Sample-4Cu-NZF/PZT (1 : 3)46.369.042.75
Sample-5PZT37.468.373