Microwave absorbing properties of teflon coating for x-band frequencies

In this research, teflon coating for microwave absorption applications was investigated. The microwave absorption properties of teflon with thicknesses of 1, 2, 3, 4, 5, 6, 7, and 8 mm were investigated using a vector network analyzer (VNA) in the frequency range of 7–13 GHz. Based on the reflected signal (S11) and transmitted signal (S21), the complex permeability (μ) and permittivity (e) of teflon were resulted. The optimal absorption properties were achieved with a reflection loss of less than −10 dB (90% absorption) for −17.35 dB at 10.5 GHz at a thickness of 8 mm.