论文标题
总和规则在线性和时间不变的薄吸收器中超出Rozanov标准以外的界限
Sum Rule Bounds Beyond Rozanov Criterion in Linear and Time-Invariant Thin Absorbers
论文作者
论文摘要
Dallenbach层由连接到完美的电导体（PEC）纸上的吸收磁性层组成。在线性和时间不变性（LTI）假设下，Rozanov在分析上在预定义带宽上的吸收疗效与层厚度（即所谓的Rozanov结合）之间建立了总和规则的权衡。近年来，已经引入了几项建议，以绕过使用非LTI吸收器的限制。但是，实际上，他们的实施可能具有挑战性。在这里，我们在Rozanov的派生中揭示了其他隐藏的假设，因此我们为LTI层吸收器引入了几个新的总和规则，这些规则不受原始Rozanov的标准涵盖，并对吸收极限产生更轻松的约束。然后，我们展示了吸收薄层的实用LTI设计，这些层可提供超出罗扎诺夫结合的吸收。这些设计基于通过各种可渗透阻抗表替换原始PEC边界。
Dallenbach layer is composed of an absorbing magnetic-dielectric layer attached to a perfect electric conductor (PEC) sheet. Under linearity and time invariance (LTI) assumptions Rozanov has established analytically a sum-rule trade-off between the absorption efficacy over a predefined bandwidth and the thickness of the layer, that is the so-called Rozanov bound. In recent years several proposals have been introduced to bypass this bound by using non-LTI absorbers. However, in practice, their implementation may be challenging. Here, we expose additional hidden assumptions in Rozanov's derivation, and thus we introduce several new sum rules for LTI layer absorbers that are not covered by the original Rozanov's criterion, and give rise to more relaxed constraints on the absorption limit. We then, demonstrate practical LTI designs of absorbing thin layers that provide absorption beyond the Rozanov's bound. These designs are based on the replacement of the original PEC boundary by various types of penetrable impedance sheet.
