Robust design of radar absorbent material with broadband characteristics

摘要

Recently, radar absorbent materials (RAM) with various characteristics have been developed according to applications. Since it is difficult to satisfy the required performance when errors occur in them during fabrication, it is necessary to have robustness of the electrical material constant. This paper shows robust design of RAM with broadband characteristics. The change magnification of relative permittivity is set to 0.3 of the limit value and that of thickness is set to 0.05. As a result, even when the design variables take the worst values with respect to the objective function, it is possible to realize broadband characteristics of relative bandwidth of 164.3% with respect to wave-absorption amount (Wa ) of 10 dB.