In this article, a fully reconfigurable frequency selective rasorber (FR-FSR) is presented. To establish systematic design guidelines, initially the conditions for full reconfigurability are derived. Then, a specific equivalent circuit model (ECM) is proposed which satisfies all the derived conditions. The circuit model is separately simulated to verify the proposed concept and further extensively analyzed to provide an in-depth design methodology for all three modes of operation. The ECM is further synthesized into a simple planar structure to obtain the design of the rasorber. In the proposed rasorber, both layers are independently reconfigurable with p-i-n diodes embedded in the top layer and varactors in the bottom layer, all symmetrically mounted to achieve polarization insensitivity. P-i-n and varactor diodes are seperately operated to achieve the desired mode of operation with minimum insertion loss. A simple and efficient bias network is proposed in such a way that it does not affect the performance of the rasorber. The sample prototype is also fabricated and experimentally tested where a good agreement between simulated and measured result is obtained.

中文翻译：

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基于 FSS 的完全可重构 Rasorber 具有增强的吸收带宽和简化的偏置网络

在本文中，介绍了一种完全可重构的频率选择性吸收器 (FR-FSR)。为了建立系统的设计指南，首先推导出完全可重构性的条件。然后，提出了满足所有导出条件的特定等效电路模型（ECM）。单独仿真电路模型以验证所提出的概念，并进一步广泛分析以提供适用于所有三种操作模式的深入设计方法。ECM 被进一步合成为一个简单的平面结构以获得 rasorber 的设计。在所提出的光吸收器中，两层都可以独立重构，pin 二极管嵌入顶层，变容器位于底层，全部对称安装以实现极化不敏感。引脚和变容二极管分别操作，以实现所需的操作模式，同时插入损耗最小。提出了一种简单有效的偏置网络，其方式不会影响吸收器的性能。还制造了样品原型并进行了实验测试，其中获得了模拟和测量结果之间的良好一致性。