A simple method for the selection of the appropriate choice of surface‐mounted loading resistor required for a thin radar absorber based on a high‐impedance surface (HIS) principle is demonstrated. The absorber consists of a HIS, (artificial magnetic ground plane), thickness 0.03λ0 surface‐loaded resistive‐elements interconnecting a textured surface of square patches. The properties of absorber are characterized under normal incident using a parallel plate waveguide measurement technique over the operating frequency range of 2.6–3.95 GHz. We show that for this arrangement return loss and bandwidth are insensitive to ±2% tolerance variations in surface resistor values about the value predicted using the method elaborated in this letter, and that better than −28 dB at 3.125 GHz reflection loss can be obtained with an effective working bandwidth of up to 11% at −10 dB reflection loss.
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Munir et al. (2009) studied this question.
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